Xinjiang Petroleum Geology

Internal Configuration of Channel Sand Body of Reservoir in Dagang Oilfield

DOU Song jiang, SUN Chao-nan, ZHANG Yan-jun, KONG Ling-jiang

2009, 30 (3): 284-286.

Abstract ( 110 )

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Taking meandering reservoir in Minghuazhen area in Huanghua depression in western Dagang oilfield, the point bar mode and scale, the recognizing marks of abandoned channel and point bar and its internal configuration quantitative distribution in this meandering sand body are presented, including inclination, dip angle and width of the lateral deposit. And integrated with single well interpretation and dynamic analysis, the prediction of interwell distribution of argillaceous lateral deposit is conducted.

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Method for Calculation of Volcanic Reservoir Porosity Based on ECS Log

KUANG Li-chun, DONG Zheng, SUN Zhong-chun, LUO Xing ping

2009, 30 (3): 287-288+296.

Abstract ( 108 )

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The mineral components of volcanics are complicated and variable. The density of matrix of each type volcanic rock varies widely, so it is difficult for using conventional methods to calculate its porosity. Element capture spectrum (ECS) log can present two measurement results including the percentage of primary rock-forming elements and various oxides of formation, which are closely related to density of rock matrix. According to this, the model for calculating density of matrix of volcanic rocks is established. Integrated with density log, it is used to calculate porosity of volcanic reservoir. Practice shows that the method has good geological application effect in Junggar basin.

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Depositional Environment of Paleogene Anjhaihe Formation in Southern Margin of Junggar Basin and Its Significance in Petroleum Geology

QI Xue-feng, WU Xiao-zhi

2009, 30 (3): 289-292.

Abstract ( 107 )

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Based on the study of depositional features, papeoecological features of Paleogene Anjhaihe formation in southem margin of Junggar basin, combining with the characteristics of clay minerals and microelements, it is shown that this formation was dominated by shallow lake environment, with relatively low salinity of lake water in the early stage of deposition; but in the middle stage, the lake was rapidly expanded and deepened, with salinity growing, the halophytic molecules in the biological groups flourished and marine algae fossils occurred; in the late stage the lake basin shrank and was rapidly desalinated. It is inferred that in the middle stage, the deposits of Anjihaihe formnation was once influenced by the seawater of Tethys Sea, forming brackish water environment, with developed halophytic molecules such as Kassinina, Hemicyprideis, etc. of Ostracoda, and marine Dinflagellate appeared. In condition of the highly saline water, it tends to form the lake-bottom anaerobic environment, favorable for preservation and conversion of organic matters, thus most favorable for the shaping of the source rocks.

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Impact of Structural Migration and Reverse on Oil-Gas Migration and Accumulation in Eastern Linqing Depression

CHU Qing-zhong

2009, 30 (3): 293-296.

Abstract ( 74 )

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This paper studies the structural migration and reverse phenomenon and its effect on petroleum migration and accumulation in eastern Linqing depression. It is the multiple structural migration and reverse that results in no subsiding and/or sedimentary center occurred in this area, which have negative effects on the deposit thickness and maturity of source rocks here.

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The Prospects for Petroleum Exploration of Carboniferous in Sannan-Dishuiquan Sag and Adjacent Areas in Junggar Basin

LAI Shi-xin, HAN Xiao-li, QU Wei, WANG Li-lei

2009, 30 (3): 297-299.

Abstract ( 119 )

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Sannan-Dishuiquan sag in Junggar hasin has heen ocurred in continental depressed and sedimentary stalus in Carboniferous period. The seismie geologic interpretation shows thal upper voleanics sequence. sedimenlary rock and lower volranics sequenee ar developed in Upper Carboniferous in this area. And god! soure rork developed in the sedimentary rock ('onstituters the major gas sourve rocks of Upper Carloniferous gas reservoir in this area together with Dishuiquan source rock of Iower Carboniferuus. 'This paper presrents the studies of the Carboniferous ocurrence. source-reservoir-cap rock conditions of gas rservoir. resoure amnou ssessent and petroleum accunulation model. It is indiraterd that the upper and lower sequencrs of voleanir rocks in the slusdied arera are all gonxd oil-gas reservoirs. The Carboniferous voleanic rourks in Sannan-Dishuiquan sag and is adjacent areas are of gond prsperts for petroleum exploration. with massive gas resourees. being as favorable largets for gas exploration in Junggar basin.

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Sedimentary Characteristics of Late Permian in Western Hubei Province and Evolution of Inter-Platform Rift

ZHUO Jie-wen, WANG Jian, W ANG Zheng-jiang, XIE Yuan, YANG Ping, LIU Jian-qing, ZHAO Zhan

2009, 30 (3): 300-303.

Abstract ( 91 )

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In the Middle-I ate Permian, with the open of paleo-tethys, on the regional tension background, the westerm Hubei provinct(Exi area) was transformed from the gulf into the trough, and developed into an inter-platform rift (trough) in the northesterm margin of carbonate platform in the Middle -Upper Yangtze block, which was controlled by Jianshi-Y ushan-Pengshui fault. This inter-platform rift (trough) plays an important role in the control of sedimentary facies and distribution of the organic reefs of Late Permian- -Early Triassic in eastem Sichuan and Exi area.

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Sedimentary Features and Favorable Reservoirs of Permian in Wu-Xia Area of Junggar Basin

YAN Jji-hua, CUI Yong-bei, CHEN Shi-yue, LU Zhen-yu

2009, 30 (3): 304-306.

Abstract ( 94 )

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The Permian of Wuerhe-Xiazjie (Wu-Xia) area in Junggar basin was in the early-middle period of foreland basin. Being affected by different factors, such as fault movement, volcanic action and sedimentary source, in the Early Permian, there developed volcanic rock, pyroclastic rock and normal clastic rock. The volcanic action was weakened gradually upward. In the Middle-Late Permian, the foreland basin changed to down-warped basin gradually. And its Fengcheng depositional stage there was a big lake transgression and the depocenter migrated to the south. In Xiazijie depositional stage and Lower W uerhe depositional stage, there widely developed fan delta and lacustrine facies assemblage with a basal level cycle of ascending- descending- ascending from botom to top. The development of volcanic reservoirs are controlled by lithology and structure, while that of clastic reservoirs by sedimentary facies. In general, the most favorable reservoir space types include the intragranular dissolved pore in the sands of underwater distributary channel of fan delta front, the fissures of pyroclastic rock in mobile belt and the vesicular pore of volcanic rock in deep zone.

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The Es³ Provenance System of Eogene Shahejie Formation in Minfeng Sub-Sag

YANG Yong-qiang, QIU Long wei, ZHANG Bo ming, MENG Tao

2009, 30 (3): 307-310.

Abstract ( 85 )

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The study of provenance system includes the clastic composition type and microscopic feature, heavy mineral assemblage, typical element distribution, sands distribution and palaeogeographic framework, etc of Es³ of Eogene Shahejie formation in Minfeng sub- sag. The results show that the metamorphic rock, granite pegmatite, mid-basic effusive rock, basic-ultra basic intrusion rock and sedimentary rock are the main types of parent rocks. There exist NES directions of provenance systems in the studied area where obvious differences in the heavy mineral assemblages, the typical element ratio and the rock composition occur, thus forming the inshore submarine fan in the north, the Yong'an delta in the east and Dongying delta in the south. With the stratigraphic younging, the progradational boundaries of sediments appear towards the basin, with the shrinkage of north provenance system. The intersection area of the three directional provenance systems could be favorable prospecting area of turbidites.

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Analysis of Sedimentary Provenance of the Lower Segment of Paleogene Lower Ganchaigou Formation in Wunan-Lvcaotan Area, Qaidam Basin

YI Ding-hong, CHEN Qi-lin, WANG Bin-ting, PEI Ming-li, TIAN Guang-rong, ZHOU Hui-wen

2009, 30 (3): 311-312.

Abstract ( 85 )

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On the basis of comprehensive researches of the driling, well logging, 3D seismic data and paleogeographic setting in this area, this paper proposes a new point of view that when E! deposited, Lvcan-1 well area was a developed area of Tiemulike provenance, while Nancan-2 well area was convergence site of Tiemulike, Kunlunshan and Dongchaishan provenances. Based on this recognition, the range of braided stream delta shaped from Tiemulike provenance can be extended toward the east.

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Geochemical Characteristics of Oil Bitumen in Ordos Basin

LI Hong-ying, HE Ying, YANG Lei, PAN Ai-fang

2009, 30 (3): 313-315.

Abstract ( 99 )

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Geochemical characteristics of trace elements and rare earth element (REE) of oil bitumen in Ordos basin are studied, and results show that such oil bitumen is rich in trace elements of iron group, sulphur group and alkali metals, relative absence of REE and radioactive element. The REE is similar to those of upper crust and Chinese sedimentary rock, indicating that the original materials for forming oil in Ordos basin are not only from organic matter of upper crust, but also partly from deep materials.

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1-D Forward Modeling of Y anchang Formation in Jiyuan Area in Ordos Basin

ZHANG Chun-lei, WANG Xin-min, GUO Yan-ru, YU Xiao-wei

2009, 30 (3): 316-318.

Abstract ( 66 )

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Based on the characteristic of mid-lower part of lithosome or sand body of Y anchang formation of late Triassic in Jiyuan area, Ordos basin, multiple geologic models for sand-shale-based combinations are designed for the purpose of reducing the interpretation ambiguity of sedimentary system, and the forward modeling is conducted. The seismic response features of individual model are summarized. The results of forward modeling are proven to be helpful to interpret and predict the thickness and distribution of lithosome or sand bodies qualitatively and quantitatively.

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Major Control Factors of Petroleum A ccumulation in Huanghekou Sag

TIAN Li-xin, YU Hong-zhong, ZHOU Xin-huai, PENG Wen-xu, WANG Yu-jin

2009, 30 (3): 319-321.

Abstract ( 86 )

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Huanghekou sag is prolific hydrocarbon sag, in which discovered reservoirs and oil-gas bearing structures are most characterized by medium to shallow buried depth, medium density of crude, good oil quality and high productivity. Multiple sets of oil- bearing sequences are found in vertical direction, mainly distributed in Neogene system. The major control factors of petroleum accumulation in Neogene are as follows: 1) near the hydrocarbon source and rapid accumulation in late period; 2) shallow-water delta deposit system provides the reservoir spaces for forming premium reservoir, and 3) late strike-slip associated fault is the key of oil-gas enrichment in central structure zone in Huanghekou sag.

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Characteristics and Influencing Factors of Low Permeability Sandstone Reservoirs-An example from Xishanyao formation in Baka oilfield

WANG Wei, CHEN Wen-wu, WANG Guo-hong, ZHOU Hong-yan

2009, 30 (3): 322-324.

Abstract ( 92 )

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Based on the lab data of cast thin section, scanning electron microscope and high pressure mercury injection, etc., the study of sandstone reservoir of Xishanyao formation in Baka oilfield in Tuha basin is conducted. The result shows that the lithology of this reservoir is feldspar lithic sandstone, with low maturity of composition and texture; the pore space of reservoir is dominated by intergranular pore and dissolved pore, belonging to the reservoir with poor quality, low original productivity and serious heterogeneity. The reservoir is influenced by sedimentary mirofacies, diagenesis, microfracture, among which the channel mouth bar and underwater distributary channel act as favorable microfacies for reservoir development. In the early stage of diagenesis, the large quantities of clay films were formed, which were favorable for preservation of original pores and throats, while existence of numerous microfractures allowed various pores to be efectively connected, thus improving the permeability of the reservoir.

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Simulation of Natural Gas Altered by Thermochemical Sulfate Reduction

DING Kang-le, LI Shu-yuan, YUE Chang tao, ZHONG Ning ning

2009, 30 (3): 325-328.

Abstract ( 89 )

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High H₂S-bearing natural gas is usually referred to the thermochemical sulfate reduction (TSR). The thermosimulation experimental study of reaction between natural gas and magnesium sulfate is made in unsaturated water vapor of HTHP. Its possible reaction pathways are determined, and the geochemical characteristics of natural gas in TSR are presented. The possible geologic factors influencing the process of TSR are investigated. The results show that MgO, H₂S, CO₂ and coke are the main products of such a reaction. With the simulated temperature increasing, the degree of conversion of TSR is increasing, and the total hydrocarbon content in natural gas is decreasing, showing CH₄ gas ratio is gradually increasing, accompanied by the decreasing of contents of C₂H₆ and C₃H₈ The apparent positive correlation between the gas dryness and CO₂ content, the low positive correlation between gas dryness and H₂S content, and CO₂ and H₂S content indicate there are different control factors in different stages of TSR. The study shows that the origin and evolution of high H₂S-bearing natural gas are probably controlled by temperature, carbochain length, metallic ion, water content and H₂S concentration in geologic settings.

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Effects of Deep Fluid on Biomarkers in Crude Oil

LIANG Ting, ZHANG Liu-ping

2009, 30 (3): 329-332.

Abstract ( 88 )

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This paper presents the varied characteristics of biomarkers of saturated hydrocarbon and aromatic hydrocarbon in process of deep thermal fluid. Under the impact of thermal energy of deep fluid, the values of m($\sum{n}C_{21-}$)/m($\sum{n}{C_{22}}^{+}$) and m(Pr)/m(Ph) increase while the n-alkane's odd-even carbon number predominance gets weaken; the values of m(C₃₁ hopane)/m(C₃₀ hopane) and m(C₃₅ hopane)/m(G₃₄ hopane) decrease, while those of m(C₂₇-C₂₉ sterane 20S)/m[C₂₇-C₂₉ sterane (20S+20R)] and m(C₂₇-C₂₉ steran ββ)/m[C₂₇-C₂₉ steran (ββ+αα)] increase, aromatic hydrocarbons are enriched. If the deep thermal fluid is rich in hydrogen, the biomarkers like m($\sum{n}C_{21-}$)/m($\sum{n}{C_{22}}^{+}$),m(Pr)/m(Ph), m(Ts)m(Ts+Tm), etc. will fail in indicating matunity and sedimentary environment. Based on these, the identified biomarkers of organic matter in crude oil or hydrocarbon source rock that influenced by the deep thermal fluid are proposed preliminarily in this paper.

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Application of Hilbert-Huang Transformation to Noise Elimination of Seismic Data

LIU Qing-rmin, YANG Wu-yang, TIAN Lian-yu, XU Yun-ze, LI Lin

2009, 30 (3): 333-336.

Abstract ( 95 )

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Hilbert-Huang transformation is a newly developed time- frequency analysis method for dealing with non-linear and non-stationary signals. This paper briefly introduces the basic principle, several key technology and advantage of Hilbert-Huang transformation. And its application to the decomposition of seismic signals with random noise shows that the original signals can be reconstructed with this method, being worthy of further research and popularization.

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Technique and Application of Converted-Wave Spltting for Multi-Layer Fracture Media

ZHANG Xue-ying, MA Zhao-jun, XU Mei

2009, 30 (3): 337-339.

Abstract ( 90 )

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Based on S-wave spliting theory, this paper presents a converted-wave splitting analysis method for getting energy ratio using radial and transverse components of wide-azimuth converted-wave data, and proposed the layer stripping S-wave splitting technique for multi-layer fracture media. Firstly, the energy ratio method is used to obtain the azimuth and time delay of the first layer fracture medium. Then, the time delay is applied to compensation of slow-wave time delay. Lastly, the fast-wave and compensated slow wave are rotated back to original radial and transverse components. After the first fracture medium is converted into isotropic medium, the fractural parameters are obtained by lower multi-layer anisotropic media analysis. The technique has been applied to prediction of stratigraphic fractures in western Sichuan and good results have been acquired.

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Method for Reserves Calculation of Gas Reservoir with Restricted W ater

GUO Chun-hua, ZHOU Wen, YAN Ning-ping, LI Hai-peng, YANG Yu

2009, 30 (3): 340-342.

Abstract ( 79 )

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The quantity of gas reservoir with water has been increasing year by year. Material balance equation integrated with optimum auto-simulation method can be effectively used for calculation of water influx and reserves in gas reservoir. For a gas reservoir with limited aquifer influx, a special material balance equation is proposed for the purpose of simplification. The case study shows that this simplified method is reasonable and feasible for reserves calculation of gas reservoir with inactive water yield.

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Impact of Reservoir Deformation on Phase Equilibrium in Depletion of Low Permeability Condensate Gas Pool

YAO Jun-hui, YANG Xiao-song

2009, 30 (3): 343-345.

Abstract ( 87 )

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In the process of natural depletion of condensate gas reservoir, with decline of formation pressure and increase of effective stress, the pore volume of reservoir will decrease, allowing such a process to assume a declining process of the pore volume in physics rather than a process of constant volume depletion. For this reason, the mathematic model for phase equilibrium of condensate oil-gas system depletion, considering the pore volume decreasing is proposed on the basis of stress sensitivity test. The case study indicates that with respect to constant volume depletion process, the reservoir deformation will result in decrease of the pore space in it, and the lighter gas in the pore will be more discharged, forming "heavier fluid" and bigger retrograde condensed liquid saturation. So, for a reservoir with more intensive stress sensitivity, the influence of such a decline of pore volume on phase equilibrium process of condensate oil-gas depletion should be considered.

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Study on Reaction Kinetics Behaviors of New Cross-Linked Acid with Dolomite

W ANG Hai-tao, YI Xiang-yi, LI Xiang-fang, LU Yuan

2009, 30 (3): 346-348.

Abstract ( 75 )

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Based on the reaction kinetics models between acid and dolomite under the control of temperature, integrated with newly developed cross-linked acid system, the experimental research is conducted. The testing principle and method for reaction kinetics behaviors between acid and dolomite are presented and tested. The related parameters and equations on them in different conditions are obtained. The correlation of field common acid and gelled acid with dolomite is made in the same testing condition. It is concluded that such reaction kinetics behaviors as low reaction rate and low effective mass transfer coefficient of the cross-linked acid will be favorable for reducing the acid filtration loss for the purpose of deep acid fracturing treatment.

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Study on Cut-Off Net Pay Thickness of Heavy Oil Reservoirs in Junggar Basin

HE Ai-dong

2009, 30 (3): 349-350.

Abstract ( 89 )

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This paper analyzes the development effectiveness of heavy oil reservoirs with different oil viscosities in Junggar basin, discusses the economic limit oil-steam ratio for them and proposes the cut-off net pay thickness under different oil viscosities developed by steam injection process. And obvious results have been obtained using the cut-off net pay thickness to calculate the proved heavy oil reserves in Junggar basin.

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Productivity and Influencing Factors of Oil Reservoir with Low Permeability and Pressure Sensitivity

WEN Hua

2009, 30 (3): 351-354.

Abstract ( 70 )

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Low permeability reservoir is not only of existence of threshold pressure gradient, but also could be deformed when the reservoir permeability exponentially decreases with formation pressure decline. This phenomenon most occurred in reservoirs with abnormal pressure and low or super-low permeability. Based on the pseudosteady state theory of non-Darcy flow and deformed media percolation and relative flow behavior equation of oil and liquid phases, the three-phase flow IPR curves with maximum flow rate point in low permeability and pressure sensitivity oil reservoir are derived, by which the allowable minimum flowing pressure in oil well o reservoir can. be calculated. Also, combining with the production data from Puxi oil field in Daqing, the threshold pressure gradient, deformation cofficient, drainage radius, average formation pressure and water cut that affect the reservoir productivity are studied. The results show that the threshold pressure gradient, deformation coefficient have remarkably influences on the reservoir productivity and the allowable minimum flowing pressure. This method can be used to effectively evaluate and forecast the variation of productivity in oil reservoir with low permeability and pressure sensitivity, meanwhile, provide bases for determination of reasonable flow pressure and routine of work as well as sufficiently displaying well flow capacity.

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Well Test Interpretation Model for Dual-Porosity Sulfur Deposit in High Sulfur-Bearing

Gas Reservoir

2009, 30 (3): 355-357.

Abstract ( 71 )

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In high sulfur-bearing gas reservoir, with decline of formation energy, the hydrogen polysulfide of gas will be decomposed and the sulfur element will be precipitated. When the sulfur amount precipitated reaches a critical value and the fuid hydrodynamic force is insufficient to carry it, the sulfur will deposit and accumulate in pores of formation, in which contamination will occur, and two characteristic regions will be formed such as contaminated zone and uncontaminated one of sulfur deposit. This paper presents such two- zone compound well test interpretation mathematical model for high sulfur-bearing gas reservoir with dual porosity media. Using Stehfest inverse algorithm the corresponding typical curves of botom-hole pressure are calculated, the correlate parameters' sensitivity to the bottom pressure performance is analyzed. .

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Numerical Simulation of Low Temperature Oxidation Mechanism for Air Injection in Light Oil Reservoirs

YANG Bao-quan, REN Shao-ran, YU Hong-min, WANG Jie-xiang

2009, 30 (3): 358-361.

Abstract ( 99 )

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Air injection low temperature oxidation (LTO) process is a inovel technique for enhanced oil recovery (EOR) in light oil reservoirs. In order to study the mechanism of air injection LTO, the kinetic model of LTO process under reservoir conditions is presented on the basis of crude oxidation experiments. Using thermal recovery numerical simulation technique, the variation of oil saturation, temperature, gas migration and oil viscosity after air injection in high water cut reservoir is studied, and the effects of flue gas composition and injected air on recovery ratio are compared. The result shows that oil saturation after air injection decreases obviously, the maximum temperature of oxidation front is up to 190℃, and oxygen consumption per cubic meter of crude oil is 589m³ at nornal condition. All the oxygen is consumed before it reaches the production well, so air injection is safe and guaranteed. The smaller N₂/CO₂ volume ratio in the flue gas is, the higher recovery ratio will be. .

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Identification of Water Flooded Zone of Lower Wuerhe Formation in District No.8 of Karamay Oilfield

YAO Zhen-hua, TAN Jian-hua, LI Shi-hong, XU Bin, FAN Xiao-qin, JIANG Tao, SHI Yong1

2009, 30 (3): 362-365.

Abstract ( 86 )

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Based on the geologic feature and the development performance data of Lower W uerhe reservoir in District No.8 of Karamay oilfield, its well log response characteristic is analyzed. The comprehensive identification method for water flooded zone of fractured low permeability conglomerate reservoir at the mid-late stage by water flooding process is proposed. The water flooded zones in tertiary infilling adjustment wells are explained. According to the production rates from these adjustment wells, the results from this method are coincident with the actual conditions by 93.8%. Also, the factors affecting the water flooded degree are analyzed. It is recognized that the distribution of water flooded zone is mainly controlled by fracture and water injection rate. In plane, the water flooded feature is dominated by injected water flooded type of EW direction followed by NS direction; while in the vertical, dominated by bedding water flooded type, in which the water flooded degree is generally affected by the openness of corresponding oil layer and the development o fracture system. The water flooded degrees of P₂W₃ and P₂W₄ are relatively serious, with 80~120 m in water flooded height, 300~500 m in the length and about 100 m in thickness.

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Analysis and Comparison of Liquid Loading Models with Gas Well Information in Baimiao Gas Field

GAO Wu-bin, LI Min, HONG Shu-na, JIANG Yi-we, BI Jian-xia

2009, 30 (3): 366-368.

Abstract ( 89 )

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There are four famous models for calculation of liquid loading critical flow rate in a gas well, such as Turner model, Coleman model, Nosseir model and Li Min model. Among these models, the first three models are of small discrepancies, but Li Min model only accounts for 38 percent of Turner model in calculated value. In order to make good use of these critical flow models, a comparative study of Turner model and Li Min model is conducted using the actual field data in this paper. The result shows that the liquid loading critical flow rate in gas well determined by Li Min model is more accurate than that by Turner model.

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Application of Imaging Logging to Study of Terrestrial Stress in Chezhen Sag, Shengli Oilfield

ZHOU Lun-xian

2009, 30 (3): 369-372.

Abstract ( 97 )

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Taking Che-66 well area in Chezhen sag as an example, the horizontal direction of terrestrial stress is studied using electric imaging logs and dipole acoustic logs. The drilling-induced fractures given by the imaging logging interpretation are accordant with the maximum horizonta! stress orientation, while the minimum horizontal stress orientation is obtained by the hole collapse direction and macroaxis orientation. The fast S-wave orientation from anisotropic imaging map by dipole acoustic logs means the maximum horizontal stress azimuth. The orientation frequency diagram of maximum horizontal stress for drilling induced fractures, hole collapse and fast S-wave azimuth is presented according five wells' electric imaging logs and dipole acoustic logs. The major orientation indicates that the present maximum horizontal stress azimuth of Che-66 well area is the orientation of NWW --SEE, basically accordant with the strike of basin-dipping fractures adjacent to this well area, reflecting the hereditabilty of terrestrial stress field.

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Streamline Numerical Well-Testing Interpretation Model for Irregularly Contaminated Wells with Application

WU Ming-lu, YAO Jun

2009, 30 (3): 373-375.

Abstract ( 79 )

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The pressure response characteristic curves for irregularly contaminated wells are obtained by solving the models of the two stages using streamline method and finite difference method, respectively. It is indicated from analysis of pressure response characteristie curves that in radial flow period, the pressure derivative curves will coincide in condition of different skin factors, when the contaminated degrees of testing well in different directions are the same, otherwise, they will not coincide, and radial flow formns under the two circumstances do not change. Also, the streamline numerical well-testing interpretation software is worked out. The case study indicates the feasibility of the software and the models in field application.

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The Seismic Data Loading Method for Interpretation Project Database of Junggar Basin

MENG Zhao-xu, YU Hui-song, ZHAO Guo-ai

2009, 30 (3): 376-378.

Abstract ( 94 )

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Junggar basin is characterized by complicated seismic data, non-uniform datum level and iregular data quality. The amplitude normalization of oniginal seismic data is conducted so as to unify the datum level to a constant water level, thus forming a set of seismic database with good quality and uniform datum for the purpose of meeting the demand of research and production nowadays.

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Digital Geophysical Prospecting Engineering Construction in Tuha Oilfield

YANG Biao, HE Ming-zhi, LIN Ming-qiang, NI Lian-bin, YANG Bin

2009, 30 (3): 379-380.

Abstract ( 79 )

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In view of the difficulties of various types, big scope and difficult inquiry of seismic prospecting data in Tuha field, a solution approach is proposed for realizing the correlation, inquiry based on the computer geographic information system, the complete unification between workflow and software function based on the geophysical prospecting project management process design software system and the management platform for network geographic information system (GIS), finally establishing the GeoMark geographic information system of Tuha field. This solution approach has been applied to Tuha basin and Santanghu basin in aspects of seismic deployment, work area reconnaissance, quality monitor, acquisition supervision, project assessment and information inquiry of the geophysical engineering construction, and good results have been obtained.

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