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01 December 2001, Volume 22 Issue 6 Previous Issue    Next Issue

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The Geologic Foundation, Countermeasure and Significance for Accelerating Exploration and Development of Hydrocarbon Resources in Xinjiang WANG Yi-lin, ZHANG Yi-jie, WANG Xu-long 2001, 22 (6):  459-461.  Abstract ( 0 )   PDF (150KB) ([an error occurred while processing this directive])   Save Xinjiang is vast in territory. There exists in total 25 basins of hydrocarbon-bearing potential, with exploratary areas of 90x104km2. Particularly in Junggar basin, Tarim basin and Turpan-Hami basin that have abundant natural hydrocarbon resources. Since their proved degrees are recently very low,they are still of great potential for prospecting. As a major province containing hydrocarbon resources in China, Xinjiang should seize the opportunity or right time for “the western development”, and speed up the step of further exploration in natural hydrocarbon resources. For this reason, it is required to work out the sound countermeasures. Firstly, additional investment will be needed with reducing costs. Secondly, actively applying crude and gas from mid-Asia countries by means of regional superiority. Thirdly, coordinating the relationship with the local authorities to promote the local economy. Finally, lay down related policies in order to speed up the exploration, development and utilization of natural gas resources in these basins. References | Related Articles | Metrics

Analysis of the Formation Stages of Oil and Gas Reservoirs in Tarim Basin KANG Zhi-hong, WEI Li-ling, KANG Yan-fang 2001, 22 (6):  462-464.  Abstract ( 101 )   PDF (375KB) ( 224 )   Save Tarim basin is characterized by multistage hydrocarbon generation and migration, formation of reservoir,regulation and destruction. This paper, by means of trap-forming and hydrocarbon generation/ drainage analysis method, organic reservoir rock analysis method, diagenetic mineral(e.g.ilite) isotopic dating method, and calculation by saturation pressure/ dew point pressure in hydrocarbon reservoirs, makes a systematic analysis of reservoir formed stages in Tarim basin. The results show that the oil reservoirs are primarily formed in Indo-China-Late Himalayan movement, dominated by Middle-I ate Himalayan movement. In addition, the different petroleum systems in Tarim basin have been drawn and analyzed, pointing out that Tarim basin is characterized by forming reservoirs in late stage. References | Related Articles | Metrics

The Evidence and Characteristics of Vertical Micro-Migration of Upper Pool's Hydrocarbons in Northern Tarim Basin HOU Wei-guo, SU Jiang-yu 2001, 22 (6):  465-468.  Abstract ( 71 )   PDF (505KB) ( 252 )   Save The hypothesis of“Stack effect” is fundamental basis for directly finding out reservoir by means of techniques of non-seismic geophysical prospecting and geochemical prospecting. The study, of direct information such as surface soil, multiwell cutings of diferent depth, light hydrocarbons constituent, fingerprint fluorescence spectrum, methane carbon isotope, lithic acidolysis hydrocarbon and vertical light hydrocarbon distribution that indicate existence of deep oil reservoir, of indirect information as magnetic capacity,magnetic hysteresis loop,magnetic component of drilling cuttings and altered mineral/ mineralization that reveal vertical micro-migration of hydrocarbons, show that in northern Tarim area, its hydrocarbon constituent existed in oil reservoirs buried beneath 5000 m could still move up to the surface vertically,under effct of which,various geophysical and geochemical anomalies that can be detected over the oil reservoirs and subsurface. References | Related Articles | Metrics

Tectonic Inversion and Its Relationship with Hydrocarbon Accumulation ZHAO Guo-lian 2001, 22 (6):  469-470.  Abstract ( 74 )   PDF (258KB) ( 234 )   Save A basin may have a complex history of tectonic evolution, and it tends to be affected by tectonic inversion. The study of tectonic inversion means that tectonic inversion may control the development of oil-gas reservoir. Presently,the theory about remained basin predicts a new way for oil-gas exploration. The study of tectonic inversion will play an important role in the formation of oil-gas reservoir. This paper presents the definition,classification of tectonic inversion and its relationship with forming hydrocarbon reservoirs. Some examples are given to show this kind of relationship. References | Related Articles | Metrics

Characteristics and Preliminary Knowledge of Inner-Crustal Low Resistivity Zone in Qiangtang Area WANG Yi-chang, WANG Yong-tao 2001, 22 (6):  472-474.  Abstract ( 76 )   PDF (463KB) ( 196 )   Save The inner-crustal low resistivity zones over the profile of crustal magneto-electrotelluric survey beneath 100 km in Qiangtang area show district images which are characterized by massive body symbolided as“△”in southern segment and tremendous mushroom body in northern segment ranging from-100 km up to-10 km in depth. From the view of plane contour diagram, the northern Qiangtang area is characterized by large area of depression-uplift and bulking in its east and west parts, while the southern Qiangtang area by strip depression-uplift and zoning in its south and north parts. The results show that the low resistivity zone is related closely to the landscapes, not only indicating reliability about the zone interpretation,but that the distinctive features like block high mountain range are expressions of active deep tectonic movements. The crustal bodies in studied area are neither cold nor thermal, but cold crust alternates with thermal crust in form of wedge,,along the Quedancuo area may exist thermal plume,all of which has greater effect on its petroleum accumulation, generation and secondary origin. References | Related Articles | Metrics

Characteristics of Unconformity and Its Relations to Hydrocarbon in Bachu-Mageti Area LI Xin-min, DING Yong, ZHANG Xu, GUO Shu-yuan, MA Jian-xin 2001, 22 (6):  475-476.  Abstract ( 126 )   PDF (229KB) ( 230 )   Save The Bachu-Mageti area in Tarim basin underwent multistage tectonic movements,forming a certain number of unconformities，which were closely related to formation of the oil-gas reservoirs. Up to now，Niaoshan gas reservoir and Hetian gas field have been found and confimned their relationship with the unconformities. The study showed that there exist six unconformities in total development from Sinian to Quaternary. The important is the tops of Ordovician and Tertiary and the bottom of Pliocene series. According to the properties and relations to hydrocarbons, the unconformity can be classified into four types which could control the types and distribution of oil reservoirs to a certain extent. References | Related Articles | Metrics

On Mechanism of Forming Ancient Karst Landform of Ordovician in Tahe Oilfield WANG Liang-jun, LI Gui-qing 2001, 22 (6):  480-482.  Abstract ( 74 )   PDF (146KB) ( 287 )   Save In view of plate movement and hydrodynamic conditions, a mechanism of forming ancient karst land-form of Ordovician in Tahe oilfield is discussed. It is pointed out that the most favorable developed zones of pores, caves and fractures are firstly the steep coast and concave coast of solution channel as well as gentle slope zone of higher relief; secondly the monadnocks of higher relief; finally the zones such as pothole surroundings, dissolution potholes and slope area. The important factors for forming ancient karst landform in Tahe area are powered as plate movement, back grounded as uplift，conditioned as faulting and water, of which the key is timing, while foot cave is the foundation of forming big cavity-developed zones. References | Related Articles | Metrics

Petroleum Geologic Characteristics and Resource Potential in Tarim Basin ZHOU Hao, ZHOU Yong-chang 2001, 22 (6):  483-486.  Abstract ( 97 )   PDF (527KB) ( 258 )   Save In view of studies of the strata, sedimentary facies structure, hydrocarbon source rock, source-reservoir-seal assemblage and resource status in Tarim basin, it is considered that Tarim basin is characterized by complete strata of marine and terrestrial facies, with complicated structures constructions due to craton basin superimposed with fore-land basin; with three sets of major hydrocarbon source beds and developed reservoirs and cap rocks, forming complete sets of source-reservoir-seal assemblages; with various types of local structures and traps; paticularly with characteristics of multistage hydrocarbon generation, multistage formation reservoir and late-stage preservation generation. There are five kinds of conditions for controlling hydrocarbon in it. In addition, the status of hydrocarbon resources is analyzed or estimated in detail. It is predicted that 25x108~35x108t(OOIP) could be found in Tarim basin. This paper offers four exploratary domains and eight major prospecting blocks，including recent strategic plan for exploration. Such provides sound basis for the basin's further exploration and development. References | Related Articles | Metrics

The Effectiveness for Applying FMI Well Logging in Carbonate Reservoir of Tahe Oilfield LIU Jian-hua 2001, 22 (6):  487-488.  Abstract ( 93 )   PDF (124KB) ( 311 )   Save Because of extremely serious heterogeneity and anisotropy,great limitations occur for just applying conventional well logging techniques in Lower Ordovician carbonate reservoir with fractures and caverns in Tahe oilfield. In view of the recent year oilfield application of FMI well log in drilling of Tahe oifield, the results showed that this technique has an important value for use in reservoir identification log response calibration from conventional logging and fracture-cavity reservoir logging, modern ground stress analysis and karst zone classification. References | Related Articles | Metrics

The Fan-Delta Sedimentary System and Oil and Gas Characteristics of Tertiary in Ganchaigou Area of Qaidam Basin FU Guo-min, LU Xin-bian, SU Jian-ping, LIANG Zhi-lu 2001, 22 (6):  489-491.  Abstract ( 83 )   PDF (527KB) ( 207 )   Save There are two types of fan-delta sedimentary systems-retrogradation type and perch aggradation type that are developed at different lake evolvement in Ganchaigou area of the Qaidam basin. The two systems formed under special geologic background have different composite shapes of genetic facies and reservoir capabilities in which the sand body in underwater distributary channel and mouth bar, the sand-conglomerate body forming in down-coastal gravity flow deposit, the sand body forming in distal turbidite deposit at the delta front of the retrogrative fan-delta have better capability of reservoir and easily form hydrocarbon traps. References | Related Articles | Metrics

The Origin of Low Porosity and Low Permeability in Badaowan Formation Reservoirs of Jurassic, Shixi Area of Junggar Basin KUANG Jun, YAO Gen-shun, ZHU Guo-hua, WANG Xing-xin 2001, 22 (6):  493-495.  Abstract ( 92 )   PDF (428KB) ( 250 )   Save A systematic analysis of clastic reservoir characteristics of Badaowan formation in Jurassic in Shixi area of Junggar basin was made. It showed that the reservoir rock is characterized by low composition maturity and high texture maturity; that the diagenesis belongs to progressive buried compaction that is extensively distributed, with weak cementation, which primarily occurred in stage A1 of late diagenesis; that main types of pores is dominated by residual intergranular space with partial grain solutional voids. It is believed that the important cause of low permeability of the reservoir is resulted from the serious diagenetic compaction and enriched plastic clastic as phyllite. References | Related Articles | Metrics

The Relationship of Depositional Microfacies to Petroleum Productivity of Sangonghe Formation in Baobei District of Yanqi Basin LIU Bin, HUANG Zheng, SUN Shang-ru, LONG Guo-qing 2001, 22 (6):  499-500.  Abstract ( 83 )   PDF (345KB) ( 183 )   Save Sangonghe formation(JIs) in Baobei district of Baolang oilfield, Yanqi basin, is a braided river delta-lacustrine depositional system of shallow gentle slope with coarse grains. It has five microfacies developed, including underwater distributary channel, underwater distributary interchannel, crevasse channel(fan), overband flood deposit and lakeshore swamp deposit. The sand body of underwater distributary channel accounts for over 90 percent of reservoir in study area, which can be classified into flled channel, abandoned channel and progradational channel, based on the .sand body's petrofacies assemblage, scour extent, variation of current energy size. Of which the petrophysics of abandoned channel is the best, the well productivity is the highest too; the flled channel is secondary; progradational channel and crevasse channel(fan) are relatively poor. The study shows that the oil-gas productivity is controlled by types locations and distribution of depositional microfacies in Sangonghe reservoir. References | Related Articles | Metrics

Characteristics of Field by Gas Injection Miscible Flooding in Pubei Oilfield, Turpan-Hami Basin DING Guo, LI Dong-qing 2001, 22 (6):  501-502.  Abstract ( 76 )   PDF (225KB) ( 179 )   Save Pubei oilfeld is the first oifield recovered by gas injection miscible process in China. The project of gas injection miscible flooding is one of the critical tasks proposed in the Ninth Five-Year Plan” of the state. Since putting into production by gas injection process in 1998, stable production has been maintained at present in the whole oilfield with recovery rate of 5.6%,current recovery percent of 15.74% and composite water cut of zero,,achieving remarkable results for development. This paper studied the variation of fluid property since gas-injection production and numerical simulation results, showing that current gas-injection blocks in this oilfield have reached requirements of the miscible phase project design. It will provide significant guide for oilfields, especially for those having high gasoil ratio in westerm China developed by abundant associated gas or gas-injection miscible phase process. References | Related Articles | Metrics

Establishment of Permeability Estimation Model for Reservoir Rocks Based on Mercury Injection Curve LIAO Ming-guang, LI Shi-lun, TAN De-hui 2001, 22 (6):  503-505.  Abstract ( 85 )   PDF (317KB) ( 324 )   Save By the analysis of large number of sample mercury injection capillary pressure data, it is found that capillary pressure curve shows distinct hyperbola characteristics under log-log coordination, and any capillary pressure can only be determined by three parameters, Ps, S and Fg. The apex of hyperbola shows the situation where non-wetting phase completely occupy the effective pore volume controlling fluid flow. The absolute permeability of reservoir rock is determined by the parameters about position and shape and apex of hyperbola. The estimating model of rock absolute permeability is established successfully by position-shape and apex parameters respectively, and its reliability has been proved by plenty of measured data. References | Related Articles | Metrics

Percolation Theory of Logistic Production Decline Equation GAO Wen-jun, ZHANG Yuan-ping, YANG Xing-hua, LU Yi 2001, 22 (6):  506-507.  Abstract ( 91 )   PDF (189KB) ( 259 )   Save References | Related Articles | Metrics

Reservoir Heterogeneity of Ordovician in District No.4 of Tahe Oilfield TAN Cheng-jun, ZHOU Ying-jie, DU Yu-shan, YAN Wen-xin 2001, 22 (6):  509-510.  Abstract ( 88 )   PDF (126KB) ( 218 )   Save This paper provides qualitative and quantitative descriptions of the whole reservoir and typeⅠ、Ⅱ、Ⅲ reservoirs respectively from cross section interlayer heterogeneity to areal heterogeneity,based on the characteristics of having strong reservoir heterogeneity in the karst-fracture-cavity type carbonate hydrocarbon reservoir related to Paleocrust of weathering of Ordovician in District No.4 of Tahe oilfield. References | Related Articles | Metrics

The Formation Pressure Analysis of Ordovician Reservoir in Tahe Oilfeld, Tarim Basin LI Zong-yu, YANG Lei, LONG Xi-bi 2001, 22 (6):  511-511.  Abstract ( 89 )   PDF (273KB) ( 250 )   Save Reservoir formation pressure is a very important parameter in reservoir engineering study. In Tahe oilfield, the reservoir pressure obtained from its Ordovician reservoir often appears variations in late up and early down, which bring much trouble for analysis in reservoir engineering. This paper presents a detailed interpretation of them occurred in the carbonate reservoir, according to characteristics of the Ordovician reservoir, by applying conventional reservoir engineering method intergrated with the actual reservoir feature followed by calculated formation pressure gradient that should change with formation depth from crude vertical gravitational differentiation. References | Related Articles | Metrics

Application of Numerical Simulation Technique in Early Development of Carbonate Reservoir- an example from Ordovician reservoir in District No.3 of Tahe oilfield SUN Peng, YUAN Yu-ling, ZHANG Yong-sheng, MA Xu-jie 2001, 22 (6):  513-515.  Abstract ( 95 )   PDF (206KB) ( 190 )   Save The Ordovician reservoir in Tahe oilfield is characterized by extremely strong heterogeneity with enormous thickness of solution fissure-cavity reservoir rocks, during its development, most wells appear quick water breakthrough, quickly raising water-cut and quick production decline. This paper studied the geologic factors, recovery mechanisms and water coning of Ordovician reservoir in District No.3 by means of numerical simulation technique, put forward the principle of small oil well perforated extent,contolling recovery rate during production and early water or gas injection for supplementary energy. These provide foundation for reference for promoting high effective development of Ordovician reservoir in District No.3, Tahe oilfield. References | Related Articles | Metrics

Application of Transient Well Test in Hutubi Gas Field LIU Ying, ZHANG Hong, HU Xin-ping, LI Quan-wei, SHAN Jiang, YUAN Tie-qun 2001, 22 (6):  517-519.  Abstract ( 79 )   PDF (247KB) ( 231 )   Save Hutubi gas field is the biggest field development by Xinjiang Oilfield Company. This paper analyzed the reservoir parameters, well-controlled reserves and reasonable production scale from the gas field, based on three-year various data from transient well test interpretation, providing sound basis for further determination of development policy of it. Also, it is pointed out that such a method is of certain values for reference in fully playing a role of the modern transient well test interpretation information, promoting the level of analyzing a gas field's performance as well as ensuring appropriate development of a gas field. References | Related Articles | Metrics

Application of VIP Parallel Reservoir Numerical Simulation Software in Oilfield Development ZHENG Qiang, NIU Jin-lu, YANG Xin-ping, DING Yi, PAN Qian-ying 2001, 22 (6):  520-523.  Abstract ( 94 )   PDF (306KB) ( 343 )   Save The parallel numerical simulation software is a new technique developed in recent years. It is characterized by either dealing with large-scale and extra-large-scale reservoir numerical simulation,or speeding up calculation of the small-scale simulation, providing greater, quicker and more accurate modeling, shortening cycles for studying. This paper presents the VIP 5.0 introduced in 1999 from Landmark Company, which includes black oil compositional (containing fracture) software packages with eight CPU and accessory software, by which meganode big block oil compositional model can be run. The overall test has been made in solution stability, parallel efficiency, etc. by taking a complex fault-block reservoir in an oilfield of Xinjiang, a carbonate condensate field in abroad and a weak volatile reservoir of Carboniferous in Xinjiang as example. The tested results show that the software can reach stable solution, acer before through aplication in regulatory scheme of a foreign carbonate field contracted by Xinjiang Oilfield Company and in infilling adjustment scheme of Xishanyao reservoir in major regulatory block operated by Xinjiang Oilfield Company. The results provide convenience for in-time working out development regulatory schemes and gain time. It is indicated that all indexes of recommended schemes predicted by VIP sofware are in higher conformity with field conditions during its implementation for one year. References | Related Articles | Metrics

On Crustal Movement and Its Relation to Distribution of Oil and Gas Field PENG Wei, GUO Zhan-qian 2001, 22 (6):  527-528.  Abstract ( 86 )   PDF (428KB) ( 251 )   Save The tectonic domains with active crustal movement may include circum-Pacific tectonic zone, oceanic ridge tectonic zone and northern continental tectonic zone nowadays, in which there exist active natural earthquakes, removement of deep faults. Following a natural earthquake, oil shows could always be found on the surface. This is reason why the oilfields in USA are mostly distributed between ruinous earthquake belts, while the oilfields discovered in China are dominantly associated with active fauling. It is confirmed that more than a half of oilfields in the world is distributed within circum-Pacific and northern continental tectonic zones，indicating that the distribution of oilfield has internal relations to crustal movements, natural earthquake in a force of exo-drainage of the eath's deep fluid or material that may contain crude oil or hydrocarbon gas. Therefore these active tectonic zones in nowadays active crustal movement will be as important targets for petroleum exploration. References | Related Articles | Metrics

The Hydrocarbon Reservoir Types of Vendian in Southern Siberia Platform B.A.TOBISHIC, L.B.LANBUKOVA 2001, 22 (6):  530-537.  Abstract ( 89 )   PDF (1366KB) ( 166 )   Save The classification is presented for the hydrocarbon reservoirs in southern Siberia platform, followed by description of effect of lithology, stratigraphy, geologic structural factors on hydrocarbon reservoir shapes, origins. It is pointed out that the reservoirs in northeastern Siberia platform are mainly developed in anticlinal traps, while the southwestern reservoirs in non-anticlinal traps. This paper studied, recommended optimal program for petroleum reconnaissance survey, exploration Related Articles | Metrics