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01 August 2000, Volume 21 Issue 4 Previous Issue    Next Issue

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The Plate Tectonic Conditions and Their Controls on Hydrocarbon in Turpan-Hami Basin Zhang Kai 2000, 21 (4):  261-265.  Abstract ( 124 )   PDF (507KB) ( 245 )   Save Turpan-Hami basin, located in the southeasterm part of Junggar -Turpan ancient landmass, is a superimposed petroliferous basin with a long period of geologic development history. It is related closely to the evolution and formation of Bogeda parageosyncline rift belt for its northern part; to evolution of west end of north Tianshan mountain in narrow ocean and formation of collision foreland basin for its northwestern margin and southern part; and subjected to influence of movement between Siberia old plate and Xinjiang ancient landmass for its northeastern part. Marine and marine-continental altermating deposits are found in the Paleozoic, while continental deposits mainly in the Mesozoic. Two period uplifting movements of thermal ground anchor occurred in the deep crust-mantle of it, which forned plate tectonic conditions superimposed and enriched with two major hydrocarbon sources consisted of biogenic sediment and non-biogenie one. It is believed that Turpan-Hami basin is a medium-sized petroliferous basin with abundant oil and gas resources in its deep part. References | Related Articles | Metrics

Characteristics of Fluid Inclusions in Lukeqin Structural Belt and Its Hydrocarbon Migration and Accumulation in Turpan-Hami Basin Yuan Mingsheng, Li Huaming, Su Chuanguo 2000, 21 (4):  266-269.  Abstract ( 68 )   PDF (376KB) ( 199 )   Save There exist two types of organic inclusions in the quartzose grain cracks of oil sandstone reservoir in Lukeqin structural belt, Turpan-Hami basin. The first type is one with pure liquid hydrocarbons, which is different in size, brown in color, yellow in fluorescence, 86~118 C in temperature, and cannot tell from gas or liquid state; the second one is dominated by gas state which accounts for 10%~30%, with light yellow in color, brown in fluorescence, 113~157 C in temperature, showing gas and liquid states. Two-period hydrocarbon inflow can be reflected from the inclusions. The first period took place in early Y anshan movement, with relatively low maturity; the second one in middle Yanshan movement, with relatively high maturity of crude oil. All of the hydrocarbon came from the Upper Permian in Taibei sag, characterized by oil phase and mixed oil-water phase, and migrated from northwest to southeast and then accumulated into reservoirs. During the migration, densification of crude oil occurred in some degree, due to low maturity of hydrocarbons generation in source rocks and continuous uplifting for the structural belt during the period of Middle Late Jurassic. References | Related Articles | Metrics

Approach to the Research Method for Determination of Hydrocarbon Generation-Migration-Accumulation Stage in Petroleum System Yan Liecan, Huang Weidong 2000, 21 (4):  270-274.  Abstract ( 99 )   PDF (649KB) ( 169 )   Save Based on oil and gas prospecting practice, this paper presents the contradictions between studied conventional reservoir-formed stages and field situations,and evaluates the application of technologies as fluid inclusion enclaves analysis, autogenous llite isotopic dating to determination of reservoir-ormed stage, then points out some mistakes existed in precondition assumptions, tchnical principles and practical ranges. Also, positive connections between seismic infornation and petroleum systems are analyzed. The result shows that a principal kinetic factor for reservoir fluid migration is fault-fold structural movement in which episode potential hydrocarbon source rock could provide large-scale hydrocarbons drainage, migration, accumulation and forming reservoirs. References | Related Articles | Metrics

Reservoir Characteristics of Composite Petroleum System in Santanghu Basin Li Weimin, Zhang Ruiying 2000, 21 (4):  275-278.  Abstract ( 132 )   PDF (412KB) ( 172 )   Save The relations among the geological factors of composite petroleum system are set forth from the view point of petroleum system in Santanghu basin. Three petroleum systems exist which can be divided into upper, middle and lower sections. The middle petroleum system, the most important one, is characterized by single source, multi-reservoir and multi-stage pools. The hydrocarbon source comes from Lucaogou formation(Permian), including two stages of reservoirs due to early Indosinian movement and late Y anshan movement, dominated by the former. The major hydrocarbon distribution area is Permian hydrocarbon-generating center surrounded with Heidun-Niujuan -Mazhong zone ir Malang sag. V ertical and short- distance lateral hydrocarbon migrations are suggested and accompanied with high-filling capacity. The major reservoirs are Lucaogou formation in Permian and Xishanyao formation in Jurassic,with high efficiency in drainage and accumulation, being the most important petroleum system for its abundant hydrocarbon resources. The upper petroleum system's hydrocarbon comes from Xiaoquangou formation in Triassic, where the key stage of forming reservoirs is late Yanshan movement episode, lasting from Middle-I ate Triassic to the end of Cretaceous, while the preservation stage in from Late Cretaceous to present. The hydrocarbon is mostly distributed within the scope of matures source rock in Triassic of Tiaohu sag, and centered in Lower Jurassic vertically. References | Related Articles | Metrics

Analysis of Potentials from Subtle Pool Prospecting in Taibei Sag of 'Tur-pan-Hami Basin Liu Huchuang, Wang Wenhui 2000, 21 (4):  279-281.  Abstract ( 90 )   PDF (327KB) ( 222 )   Save The subtle traps of lithological type and stratigraphic type are found in Taibei sag of Turpan-Hami basin.The authors discussed the factors, conditions and features of these two traps, and evaluated the areas conformed to con-ditions of them,based on sandmud combination characters and their filling relations to the structures for each area ofTaibei sag. The result shows that these traps are difficult to be shaped in most part of the area,due to their special de-pendence on the geological factors. When some of the area are ready to be denied for poor potentials,predictions forfinding potentials for the two types of subtle trap in Taibei sag are made again. Related Articles | Metrics

Formation Reservoir Characteristics of Complex Hydrocarbon Ac-cumulation Zones in Yuguo-Yanmuxi Area of Turpan-Hami Basin Jiao Lixin, Tu Xiaoxian, Wang Jiahui 2000, 21 (4):  282-285.  Abstract ( 133 )   PDF (442KB) ( 212 )   Save From analysis of reservoir characters in Yuguo-Yanmuxi Petroliferous area, the middle-late Yanshanmovement episode is considered to be primary stage of controlling the hydrocarbons by structures. There are five sets ofeffective reservoir-cap rock assemblages developed in Lower Jurassic to Tertiary,where many hydrocarbon-bearing sequences and reservoir types are found,and dominated by lateral hydrocarbon migration. It reflects the characters oflate-stage formation reservoirs.Hence, to grasp the way of the hydrocarbon migration in order to detailed determinethe prospecting targets in favorable directions could be as principle train of thought for further exploration of this areain future. References | Related Articles | Metrics

Reservoir Description of Yanmuxi Oifield in 'Turpan-Hami Basin Wang Jingsong, Zhang Zonghe 2000, 21 (4):  286-289.  Abstract ( 117 )   PDF (385KB) ( 175 )   Save By utilizing reservoir description software system on computer workstation,a series of tools are adoptedto describe Tertiary and Cretaceous reservoirs in Yanmuxi oilfield, including structural configuration, reservoir geomet-ric shape, reservoir parameter, oil-gas-water distribution and pool types. The reserve calculation is also made. Related Articles | Metrics

On Technologies for Hydrocarbon Exploration in Steep Structure in Downthrow of HuoyanshanFault in Turpan-Hami Basin Sun Hao 2000, 21 (4):  290-291.  Abstract ( 69 )   PDF (227KB) ( 168 )   Save Using time depth conversion and depth migration technologies for data processing,more proper struc-tural imaging profiles in steep structure were obtained.The author analyzed the fold and transformation of structure inlower block of Huoyanshan fault in terms of shaping mechanism,and developed a geophysical model. Based on these,the reflected impedance on steep fault was determined, detailed seismic interpretation was made, and then mapped outafter velocity corrections. References | Related Articles | Metrics

Application of Prestack Noise Elimination to Seismic Data Pro-cessing in Turpan-Hami Basin Chen Xingsheng, Zhou Jianjun, Chen Xin 2000, 21 (4):  292-293.  Abstract ( 71 )   PDF (244KB) ( 280 )   Save The poor quality of field collected seismic data with multiple noise is found due to complex and variedsurface or subsurface layer in Turpan-Hami basin. this paper presents several conventional and practical prestack noiseelimination methods and analyzes their application and effects. References | Related Articles | Metrics

3D Prestack Depth Migration Processing:Example and Result Wang Zhongjie, Li Quansheng 2000, 21 (4):  294-296.  Abstract ( 55 )   PDF (368KB) ( 258 )   Save Because areal series distribution were found in seismic velocity from Shengbei area(Turpan-Hami basin),local structures were difficult to be clarified in two exploratory wells.3D prestack depth migration processing was then made based on geological model to solve the problem. This paper reviewed the migration processing and related modeldevelopment,including some key techniques applied in processing and 3D interpretation demonstration. These tech-niques and interpretation results can be as guide for the processing in the future and provide favorable objectives for ex-panding petroleum reserves scale in this area. References | Related Articles | Metrics

Formation of A Source-Mixed Type of Pool and Its Geochemical Characteristics in Turpan-Hami Basin Li Qiaomei 2000, 21 (4):  297-300.  Abstract ( 88 )   PDF (372KB) ( 188 )   Save Turpan-Hami basin is a composite petroliferous basin developed under multiple periods of tectonicmovement with multiple series of hydrocarbon source roeks including Permian,Triassic and _Jurassic. The periods ofearly,middle-late Yanshan movement and Himalayan movement are its major periods for hydrocarbon generation andexpelling. By influence of multi-period structural movements,not only are “coal-type”and “oil-type”pools with singleorigin found, but“source-mixed-type”pools existed,, and the higher degree of exploration, the more of the pools arefound. This paper analyzed the formation mechanism and geochemical features of this type of reservoir,and discussedthe method for using crude carbon isotope quantitative analysis to determine the mixed ratio. It is indicated that thismethod is feasible, thus making the mixed ratio problem arisen in the basin be solved finally. References | Related Articles | Metrics

Sedimentary Environment of Coal Measures Strata and Coal Swamp Organic Phase of Mid-dle-Lower Jurassic in Turpan-Hami Basin Li Huaming 2000, 21 (4):  301-303.  Abstract ( 79 )   PDF (323KB) ( 200 )   Save This paper analyzed in detail the sedimentary environment of Middle-Lower Jurassic in Turpan-Hamibasin by dissection of sporopolla assemblage characters in coal measure strata,structures of fossil wood and plant re-mains along with study of some special geologic phenomena such as bio-trace fossils,clay minerals and trace elements,etc. and classified coal swamp organic phase based on sedimentary environment of Shuixigou group coal measure strataand classification. Studies showed that the climate of Early-Middle Jurassic in Turpan-Hami basin belongs to subtropicwarm humid climate; sedimentary environment is dominated by shallow river swamp and lake swamp; water is by freshwater with a little acid. The sedimentary environment of coal swamp can be classified into eight types and four organicphases. References | Related Articles | Metrics

Laboratory Study onDamages of llite/Montmorillonite Interbeded Minerals in Waterflooding to Oil Reservoirs in Turpan-HamiOilfield Jiang Zuguo, Wang Yicai, Han Runjing, Huang Tianxue, Wei Guoliang, Qin Enpeng 2000, 21 (4):  304-306.  Abstract ( 107 )   PDF (346KB) ( 250 )   Save Waterflooding is a kind of conventional measure for improving production and recovery factor in an oil-field, but there exist some formation damages such as water sensitivity, emulsification, etc. In terms of geological fea-tures of reservoirs and waterflood condition in Turpan-Hami oilfield,laboratory waterflood simulation test is conducted in order to check damages of illite/montmorillonite interbeded minerals to the reservoirs by means of centrifugal tech-nique, scanning electron microscope analysis,X-ray diffraction analysis, fluorescent microscope identification and per-meability detections.This paper proposed an idea that emulsion block in migrated illite/montmorillinite interbededminerals has greater damages to oil reservoirs during waterflooding. References | Related Articles | Metrics

On Research Strategy for Enhancing Oil Recovery Factor Yu Qitai 2000, 21 (4):  307-310.  Abstract ( 96 )   PDF (501KB) ( 217 )   Save The research strategy run by three steps for enhancing oil recovery factor has been proposed. The firststep is the study of distribution type and exploration technology of “megascopic scale”unswept remaining oil. The sec-ond step is the study of distribution type and exploration technology of “macroscopic scale”unswept remaining oil. Thethird one is, on the basis of above-mentioned two steps, when making sweep efficient reach as high as possible, the meth-ods for enhancing oil displacement efficiency in the swept areas. And ten technologies for developing three enriched ar-eas of “megascopic scale”unswept remaining oil are proposed. lt is indicated that: ①the horizontal sidetracks will actthe most important part in producing "megescopic scale”unswept remaining oil;②the oil displacement agent with lowmobility ratio will act an important part in producing "macroscopic scale”unswept remaining oil;③the foamed systemadding to the chemical with different effect as base WAG with comprehensive function will act an important part in enhancing displacement efficiency in the swept areas much importantly;④thermal method can enhance displacement ef-ficiency for high water-cut oil reservoir, but can not increase sweep efficiency in most of the cases;⑤ MEOR and VEORcan not act a decisive effect to EOR; ⑥an economic evaluation is very important to EOR. References | Related Articles | Metrics

Using Water Drive Curves for Determination ofPiston Displacement Degree Index Gao Wenjun, Xu Bingtao, Wang Qian, Yang Xinghua 2000, 21 (4):  311-314.  Abstract ( 95 )   PDF (296KB) ( 194 )   Save On the basis of analyzed A,B,C,D-type water drive curves,two categories of water drive curves areproposed, which can not only be applied to predict recoverable reserves and recovery factor in a waterflooding oilfield,but can delermine piston displacement degree indexes. The study shows that the more close to 1 the degree indexes, themore obvious the piston displacement is; whereas the more close to 0, the less obvious the piston displacement. References | Related Articles | Metrics

On Effect of Injection-Production Well Patternon Recovery Factor by Water Drive Process Peng Changcheng, Gao Wenjun, Li Zhengke, Yuan Shao 2000, 21 (4):  315-317.  Abstract ( 90 )   PDF (399KB) ( 321 )   Save Previews researches of influence factors on waterflooding recovery efficiency ae studied in-depth, bywhich well pattern density, injection-production well number ratio, well patterm parameter, reservoir heterogeneity coef-ficient vs. waterflooding recovery efficiency are derived.And then a model with multi-considerations and convenient calculations is developed for recovery factor and sweep efficiency of waterlood heterogeneous reservoir. This model is alsoconverted as a waterflooding recovery efficiency model proposed by Sherkajov,Fan Jiang,Yang Fengbo et al. in certainsupposing conditions, being worth dissemination and application. References | Related Articles | Metrics

Effects and Experiences from Rolling Exploration and Develop-ment in ShenQuan Composite Oilfield of Turpan-Hami Basin He Yong, Luo Quansheng, Zhao Ming 2000, 21 (4):  318-322.  Abstract ( 140 )   PDF (462KB) ( 277 )   Save Shenquan oilfield is a typical composite oilfield in Turpan-Hami basin, containing Jurassic, Cretaceous,Tertiary (upper,middle and lower part) reservoirs in vertical,and twelve oil-bearing fault blocks developed in plane.Each block has an oil-water systern of its own with different oil/ gas enriched degrees. Since implementation of rollingexploration and development schemes in 1996, eight new petroliferous fault blocks like Shen-213, Shen-220, etc. havenot only been found, but Upper and Middle Tertiary reservoirs have been discovered, with results of increase in reservesamount year by year,and productivity added from 1x10' t to 11x10' t. Hence,to review the petroleum accumulationcharacteristics,their major controlling factors and technical route, policy and operation mode of the rolling explorationand development possess practical and useful significance. References | Related Articles | Metrics

Research on the Development Scheme for 'Tuyuke DeepHeavy Oil Field in Turpan-Hami Basin Zhao Jian, Xu Jun, Cui Yinghuai, Yang Wenzhan 2000, 21 (4):  323-325.  Abstract ( 109 )   PDF (295KB) ( 228 )   Save Tuyuke oilfield is characterized by deep burial, high crude viscosity and poor physical properties ofreservoir. There is no successful precedent for its development to date in the world. In view of mechanisms of various re-covery processes applied to heavy oil field, this paper selected some development schemes for Tuyuke oilfield, and con-ducted optimization and correlation among depletion drive,waterflooding and chemical injection,including analysis ofsensitivity parameters by chemical flooding process. In addition,the productivity equations for pseudoplastic fluid isproposed based on its plastic fluid property of crude oil, which can be as guide to economical and effective developmentof Tuyuke oilfield. References | Related Articles | Metrics

Application of Horizontal Well to Development of OilReservoir with Bottom Water in Hongnan Oilfield of Turpan-Hami Basin Xu Jun, Li Hongcheng, Liu Quanzhou, Gong Zhuo 2000, 21 (4):  326-328.  Abstract ( 82 )   PDF (343KB) ( 196 )   Save According to geological features in Hongnan oilfield,reservoir numerical simulation method is applied tocorrelate and analyze the recovery effects by using horizontal well and vertical well in lower oil measure in Cretaceousreservoir.The results have been used to make the geologic design and productivity analysis of horizontal well along withits reasonable productivity determinations. By comparison with production peformance data,it is indicated that em-ploying horizontal well to reservoirs with bottom water is of better development effectiveness,and the determined resultfor productivity of horizontal wells is creditable and the technology is feasible. References | Related Articles | Metrics

Application of Earth Vision Software in NumericalSimulation in Turpan-Hami Basin Huang Shibin, Shi Xiaoyan, Pang Huihua, Guo Suhua 2000, 21 (4):  329-330.  Abstract ( 104 )   PDF (294KB) ( 169 )   Save The Earth Vision Software is generally accepted as adeveloping geologic model software in petroleum indus-try. Since introduction into Turpan-Hami oilfield in 1997, it has played an important part in petroleum exploration, particu-larly for prospecting subtle oil reservoirs. In numericalsimulation of oilfield exploration,the software canbe applied to de-velopfaulting model, structural model,reservoir rock model andfluid model,followed by the final petrolem reservoir modelthat is the most coincident with actual situations, providing proper and reliable geologic parameters field, increasing accura-cies of thesimulation and prediction, and improvingthe levels of comprehensive reservoir management. Related Articles | Metrics

Application of Invermod Tech-nique to Reservoir Study in Shenquan Oilfield Luo Quansheng Wu Yongfu, Chen Xuan, Yang Huijuan, Wang Fengying 2000, 21 (4):  331-332.  Abstract ( 87 )   PDF (220KB) ( 228 )   Save Inversion technique is an important tool used in reservoir prediction at present. The technic principle is toconvert conventional contact-type reflection profile into stratigraphic log response,providing convenience of direct re-search areal reservoir variations、The inversion module introduced from Jason Company in Holland in 1998 is one oftechniques intended to realize the conversion. This paper briefly introduced basic principle and working flowsheet, andsuggested that using nonimpedance inversion combined with wave impedance to investigate thin layer will be more ef-fective. After applied for one year in development and prediction of shallow reservoirs in Shenquan oilfield,better re-sults have been obtained by using Invermod technique. References | Related Articles | Metrics