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Control of coupling among three major factors for formation of high-efficiency gas reservoir——A case study on the oolitic beach gas reservoir in Feixianguan Formation in the northeast Sichuan Basin

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Science Bulletin 2007年第S1期 201-214页

作者： WANG ZeCheng1, ZHAO WenZhi2, ZHANG ShuiChang3, WANG HongJun1 & YU Qian4 1 institute of geology, research institute of petroleum exploration and development, Beijing 100083, china 2 research institute of petroleum exploration and development, Beijing 100083, china 3 Testing Center of petroleum geology, research institute of petroleum exploration and development, Beijing 100083, china 4 Chengdu institute of geology and Mineral Resources, Chengdu 610082, china

Through a case study of the high-efficiency gas reservoir in Feixianguan Formation in the northeast Sichuan Basin, quantitative and semi-quantitative analyses of key elements such as hydrocarbon generation, migration and accumulation, and reservoir evolution as well as their interplay in the critical moment of reservoir formation controlled by the energy field were carried out, by means of numerical modeling of the energy field. It was found that the climax time for Permian hydrocarbon generation was Late Triassic-Early Jurassic and accumulation of oil and gas has resulted in large-scale paleoreservoirs in paleostructural traps in Feixianguan Formation, a process facilitated by fractures connecting the sources. The paleoreservoirs have been turned into high-efficiency gas kitchens due to pyrolysis, which resulted from deep burial at a temperature of 170―210 ℃ as induced by tremendously thick sedimentation in the foreland basin of Daba Mountain in Late Jurassic-Cretaceous period. Meanwhile, abundant acid gas like H2S produced from thermo-chemical sulfate reduction (TSR) at high temperatures leads to extensive dissolution of dolostone in the paleoreservoirs, which may in turn result in modification of the reservoirs and preservation of the reservoir rock porosity. The present distribution of gas reservoirs was ultimately determined in the processes of adjustment, cooling and decompression of the paleoreservoirs resulting from intense deformation in the front of Daba Mountain during the Himalayan orogeny.

关键词： energy field coupling numerical modeling high-efficiency gas reservoir Feixianguan Formation Sichuan Basin

Stratigraphic thermohistory and its implications for regional geoevolution in the Tarim Basin,NW china

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Science china Earth Sciences 2010年第10期53卷 1495-1505页

作者： WANG TieGuan1,DAI ShiFeng2,LI MeiJun1,ZHANG WeiBiao1,3,Qiu NanSheng1 & WANG GuangLi1 1 State Key Laboratory of petroleum Resources and Prospecting,china University of petroleum,Beijing 102249,china 2 State Key Laboratory of Coal Resources & Safe Mining,china University of Mining & Technology,Beijing 100083.china 3 exploration research Center,exploration & development institute,china Petrochemical Corporation,Beijing 100083.china State Key Laboratory of petroleum Resources and Prospecting China University of Petroleum Beijing China State Key Laboratory of Coal Resources & Safe Mining China University of Mining & Technology Beijing China exploration research Center Exploration & Development Institute China Petrochemical Corporation Beijing China

Fourteen vitrinite reflectance profiles from the Tarim Basin,NW china,show that the vitrinite reflectance profiles of individual wells follow a faulted and dislocated dual-stage pattern in the eastern section of the Tazhong Uplift and in the Tabei *** reflectance values in these profiles change sharply at the unconformity beneath the Lower Carboniferous Bachu or Upper Devonian Donghetang Formations,where the overlying Triassic to Carboniferous strata are still in a mature phase within the "liquid oil window".However,the underlying Lower Paleozoic reached the overmature phase beyond the "liquid oil window" towards the end of the Silurian,or in the Early Devonian at the *** the vitrinite reflectance profiles are attributed to a continuous,single-stage pattern in the western section of the Tazhong Uplift,in which the Lower Paleozoic is also in an overmature phase,their overmaturity would have been achieved relatively late in geological *** stratigraphic thermohistory has the following implications to regional geoevolution:(1) The overmature Lower Ordovician to Cambrian strata in the eastern section of the Tazhong Uplift and in the Tabei Uplift,as well as in the Manjiaer Depression,could not have acted as the source kitchen for normal oil(so-called black oil);(2) The dissimilarity in vitrinite reflectance profiles between the eastern and western sections of the Tazhong Uplift reveals Early Paleozoic paleotectonic features,i.e.,lower at the east and higher at the west,whereas recent tectonic features formed since the Late Paleozoic are in reverse,i.e.,higher in the east and lower at the west;(3) Reconstruction of the denuded thickness of sediments overlying the Lower Ordovician strata suggests reconsideration on the paleotectonic features in the Tarim Basin;(4) Based on the sustained duration of the "liquid oil window" for overmature source beds,it is predicted that the Suntuoguole Lower Uplift between the Awati and Manjiaer Depressions is a

关键词： vitrinite reflectance profile faulted and dislocated dual-stage pattern paleotectonic features sustained "liquid oil window" period source kitchen

Complex petroleum accumulating process and accumulation series in the buried-hill trend in the rift basin:An example of Xinglongtai structure trend,Liaohe subbasin

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Science china Earth Sciences 2008年第S2期51卷 108-116页

作者： GAO XianZhi1,PANG XiongQi1,LI XiaoGuang2,CHEN ZhenYan2,SHAN JunFeng2,LIU Feng1,ZOU ZhiWen1 & Li WeiLian1 1 Faculty of Resources and Information Technology,china University of petroleum,Beijing 102249,china 2 exploration and development institute of Liaohe Oilfield,petrochina Liaohe Oil Company,Panjin 124010,china Faculty of Resources and Information Technology China University of Petroleum Beijing China exploration and development institute of Liaohe Oilfield Petrochina Liaohe Oil Company Panjin China

The buried-hill trend is a typical style of the petroliferous structure in the faulted basin of eastern china. The Xinglongtai structure trend in the Liaohe subbasin,Bohai Bay Basin is a buried faulted-hill trend resulting from the periodic faulting of the Tai’an-Dawa faults. The structure was cut by various faults,which are interlinked and constitute the conduits for petroleum migration. petroleum accumulated in the Tertiary sandstones and pre-Tertiary basement of metamorphosed rocks through the migration pathways of the fault system. petroleum in the structure was derived from different hydrocarbon kitchens to form a hybrid field complex. petroleum charged the structure from different directions and accumulated in various reservoirs through different pathways in different times. The accumulations in the buried hill trend of Xingongtai are composed of two types of traps in the two stratigraphic systems: traps in the Tertiary sandstones were formed by the fault blocks and by the pinchout of the sandstone,and traps in the pre-Tertiary basement of metamorphosed rocks were formed by fissures in the inner part of the buried hills and by the unconformity near the surface of the buried hills.

关键词： faulted basin petroleum migration and accumulation petroleum occurrence buried hills Achaean basement Liaohe subbasin Bohai Bay basin

GEOCHEMICAL　CHARACTERISTICS　OF　THE　COAL－FORMED　GASES　IH　THE　EAST　OF　THE　CENTRAL－ASIA　COAL－FORMED　GAS　ACCUMULATION　DOMAIN──SERIES　STUDY　Ⅱ　ON　THE　CENTRAL－ASIA　COAL－FORMED　GAS　ACCUMULATION　DOMAIN

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石油勘探与开发 1995年第4期 102-107页

作者： Dai Jin-xing Li Xian-qi Song Yan Chen Ying(Scientific research institute of petroleum exploration and development, Beijing, 100083).

ＧＥＯＣＨＥＭＩＣＡＬＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＴＨＥＣＯＡＬ－ＦＯＲＭＥＤＧＡＳＥＳＩＨＴＨＥＥＡＳＴＯＦＴＨＥＣＥＮＴＲＡＬ－ＡＳＩＡＣＯＡＬ－ＦＯＲＭＥＤＧＡＳＡＣＣＵＭＵＬＡＴＩＯＮＤＯＭＡＩＮ──Ｓ... 详细信息

ＧＥＯＣＨＥＭＩＣＡＬＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＴＨＥＣＯＡＬ－ＦＯＲＭＥＤＧＡＳＥＳＩＨＴＨＥＥＡＳＴＯＦＴＨＥＣＥＮＴＲＡＬ－ＡＳＩＡＣＯＡＬ－ＦＯＲＭＥＤＧＡＳＡＣＣＵＭＵＬＡＴＩＯＮＤＯＭＡＩＮ──ＳＥＲＩＥＳＳＴＵＤＹⅡＯＮＴＨＥＣ...

关键词： Natural gas Geochendstry Carbon isotope Helium isotope.

Discussion on marine source rocks thermal evolvement patterns in the Tarim Basin and Sichuan Basin,west china

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Science Bulletin 2007年第S1期 141-149页

作者： ZHANG Bin, ZHAO Zhe, ZHANG ShuiChang & CHEN JianPing Central Laboratory of petroleum geology research, research institute of petroleum exploration and development, petrochina, Beijing 100083, china

Taking marine source rocks of lower Paleozoic in the Tarim Basin and Paleozoic ones in the Sichuan Basin as examples, their sedimentation process could be classified into four styles: continuous subsidence with deep sedimentation in early stage, continuous subsidence with deep sedimentation in later stage, that deeply buried-uplift-shallowly buried, and that shallowly buried-uplift-deeply buried. Unlike that in East china, the marine source rocks evolvement patterns did not accord with sedimentation styles one by one in superimposed basins in west china. Taking local geothermal field into account, four types of source rock evolvement patterns were built: that evolved fast in early stage, evolved fast in middle stage, evolved continuously and evolved in multistage. Among them, the 1st pattern contributed little to the present industrial oil pools directly, but paleo-oil reservoirs and gases cracked from crude oils were main exploration targets. Although some gases were found in the 2nd pattern, the scale was not big enough. For the 3rd and 4th patterns, the hydrocarbon potential depended on organic matters maturity in early stage. For relatively low mature rocks, it was possible to generate some oils in later stage; otherwise the main products were gases. Paleo-oil reservoirs remained fairly well in the Sichuan Basin, and most source rocks underwent kerogen-oil-gas processes, which was useful reference to gas exploration in the Tarim Basin.

关键词： thermal evolvement patterns marine source rocks hydrocarbon potential sedimentary style superimposed basins

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华北东部盆地油气勘探潜力与发展方向

石油学报 2003年第4期24卷 7-12页

作者：王毓俊田在艺中国海洋石油勘探研究院河北高碑店074010 中国石油勘探开发研究院北京100083

华北东部盆地是典型的多旋回叠加改造型盆地 ,中上元古界、下古生界、上古生界、中生界和新生界普遍具有生烃潜力和储盖组合条件。漫长的地质演化和新生代构造断裂活动形成了上第三系至太古界多层系多类型的油气藏 ,在凹陷、凸起的各部... 详细信息

华北东部盆地是典型的多旋回叠加改造型盆地 ,中上元古界、下古生界、上古生界、中生界和新生界普遍具有生烃潜力和储盖组合条件。漫长的地质演化和新生代构造断裂活动形成了上第三系至太古界多层系多类型的油气藏 ,在凹陷、凸起的各部位 ,分布着大型油气聚集带。根据盆地历史演化、勘探程度差异性及油气发现的特点 ,对华北东部盆地油气勘探潜力进行了分析。在该地区应着重研究多勘探层系、勘探程度的差异性和地质理论的新进展 ,充分挖掘各探区内各单元的油气资源潜力 ,第三系深层、前第三系、滩海和浅海应是华北东部盆地 2

关键词：华北东部多旋回叠加盆地多层系油气藏第三系深层前第三系滩海浅海勘探潜力

Total alkyl dibenzothiophenes content tracing the filling pathway of condensate reservoir in the Fushan Depression,South china Sea

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Science china Earth Sciences 2008年第S2期51卷 138-145页

作者： LI MeiJun1,WANG TieGuan1,LIU Ju2,ZHANG MeiZhu2,LU Hong3,MA QinLin2 & GAO LiHui2 1 State Key Laboratory of petroleum Resources and Prospecting,Earth Sciences and Geoinformatics School,china University of petroleum,Beijing 102249,china 2 Southern Oil exploration and development Company,petrochina,Guangzhou 510640,china 3 Guangzhou institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510240,china State Key Laboratory of petroleum Resources and Prospecting Earth Sciences and Geoinformatics School China University of Petroleum Beijing China Southern Oil exploration and development Company PetroChina Guangzhou China Guangzhou institute of Geochemistry Chinese Academy of Sciences Guangzhou China

The condensates are generally characterized by high maturity,low concentration of steranes and ter-panes biomarkers and low content of non-hydrocarbon fraction. In this case commonly used steranes,terpanes and carbazoles parameters cannot be effectively applied in the reservoir-filling tracing. The hydrogen bond formed by sulfur atom in the dibenzothiophenes (DBTs) results in molecule adsorption and fractionation during oil migration in reservoir. Like carbazoles,total DBTs content decreases with the increasing of oil migration distance. Therefore,a new parameter——total DBTs content is proposed to be used to trace the oil migration orientation and filling pathway. In present study,total DBTs con-tents of condensates and light oils are obtained by adding internal standard——eight deuterium atoms substituted DBT during Gas Chromatography-Mass Spectrometry analysis of aromatic fraction. Except for a few samples with much lower content of non-hydrocarbon fraction,the total DBTs content shows a fine positive correlation with that of carbazoles. Large errors can be caused in the process of pyrrolic nitrogen compounds separation. The application of this new parameter in the Fushan Depression of Beibu Gulf Basin,South china Sea indicates that this parameter is a reliable one to trace filling pathway in condensate reservoirs. Combined with other DBTs-related parameters,such as 4-/1-methydibenzo-thiophene and 2,4-/1,4-dimethyldibenzothiophene,oil migration orientation and filling pathway of the Fushan Depression was determined. The accumulations of Huachang oil field in the Fushan Depres-sion are mainly migrated and charged from northeast to southeast along the Huachang uplift. It can be predicated that the light oil and condensates in the Huachang oil field should be sourced from the source kitchen at the Bailian Sag. It shows that total DBTs content is an effective parameter to tracing oil migration orientation and filling pathway.

关键词： dibenzothiophene alkyl dibenzothiophene condensate reservoir filling pathway molecular markers the Fushan Depression

The controlling factors and distribution prediction of H2S formation in marine carbonate gas reservoir,china

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Science Bulletin 2007年第S1期 150-163页

作者： ZHU GuangYou, ZHANG ShuiChang & LIANG YingBo research institute of petroleum exploration and development, petrochina, Beijing 100083, china

Generally, there are some anhydrites in carbonate reservoir, as H2S is also familiar in carbonate oil and gas reservoirs. Nowadays, natural gas with high H2S concentration is usually considered as TSR origin, so there is close relationship between H2S and anhydrite. On the contrary, some carbonate rocks with anhydrite do not contain H2S. Recently, researches show that H2S is only a necessary condition of H2S formation. The reservoir porosity, sulfate ion content within formation water, reservoir temperature, oil/gas and water interface, hydrocarbon and some elements of reservoir rock have great controlling effects on the TSR occurrence. TSR deoxidizes hydrocarbon into the acidic gas such as H2S and CO2, and the H2S formation is controlled by TSR occurrence, so the relationship among reaction room, the contact chance of sulfate ion and hydrocarbon, the reservoir temperature has great influence on the TSR reaction. H2S has relatively active chemical quality, so it is still controlled by the content of heavy metal ion. Good conditions of TSR reaction and H2S preservation are the prerequisite of H2S distribution prediction. This paper builds a predictive model based on the characteristic of natural gas reservoir with high H2S-bearing. In the porosity reservoir with anhydrite, the formation water is rich in sulfate and poor in heavy metal ion. Oil and gas fill and accumulate in the gas reservoir with good preservation conditions, and they suffered high temperature later, which indicates the profitable area of natural gas with high H2S-bearing.

关键词： H2S carbonate rock distribution prediction controlling factors TSR Sichuan Basin

SEQUENCE STRATIGRAPHIC FRAMEWORK AND HYDROCARBON DISTRIBUTION OF THE TERTIARY NONMARINE STRATA IN THE BOHAI BAY RIFT BASIN

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Scientia Geologica Sinica 2001年第2期 73-86页

作者： Xue Liangqing, Chi Yingliu, and Cao Yinghui research institute of petroleum exploration & development of petrochina, Beijing 100083, china

The Tertiary strata in the Bohai Bay basin consist of the Lower Tertiary sequence deposited at the rift stage and the Upper Tertiary sequence deposited at the post-rift stage. The Lower Tertiary sequence is composed of the three second-order sequences Ek, Es4-3, and Es2-Ed. Every second-order sequence corresponding to one rifting episode can be divided into the lowstand, transgressive, and highstand third-order sequence sets, which are represented as sedimentary products of the initial rifting, lacustrine expanding and contracting stages. The late transgressive and early highstand sequence sets are favorable periods for forming regional source and seal rocks. Three sets of major source and seal rocks and four sets of source-reservoir-seal combinations are recognized in the Tertiary strata. Differences of Tertiary tectonic history in different sags or depressions result in differences of developing periods and features of source-reservoir-seal combinations.

关键词： Bay SEQUENCE STRATIGRAPHIC FRAMEWORK AND HYDROCARBON DISTRIBUTION OF THE TERTIARY NONMARINE STRATA IN THE BOHAI BAY RIFT BASIN