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Origin and accumulation of the oils from Bamianhe Oilfield, Bohai Bay Basin, Eastern china

Science china Earth Sciences 2004年第Z2期47卷 177-189页

作者： PANG Xiongqi1,2, LI Sumei1,2, JIN Zhijun3, LI Maowen4, LI Pilong5., LI Xue5.& BAI Guoping1,2 1. Key Laboratory of Hydrocarbon Accumulation, Ministry of Education, Beijing 102249, china 2. Basin & Reservoir Research Center, University of petroleum, Beijing 102249, china 3. Sinopec petroleum exploration and Exploitation Institute, Beijing 100083, china 4. Geological Survey of Canada, Calgary T2L 2A7, Canada 5. shengli petroleum exploration bureau, dongying 257015, china Key Laboratory of Hydrocarbon Accumulation Ministry of Education Beijing 102249 China Basin & Reservoir Research Center University of Petroleum Beijing 102249 China Sinopec petroleum exploration and Exploitation Institute Beijing 100083 China Geological Survey of Canada Calgary T2L 2A7 Canada shengli petroleum exploration bureau Dongying 257015 China

Utilizing basic principles and methodologies of geology and organic geochemistry, kinetics of hydrocarbons generation and accumulation, quantitative assessment of crude oils sourced from different source rocks, and hydrocarbons migration pathways for the oils from the Bamianhe Oilfield, the Bohai Bay Basin, Eastern china are discussed. Results of oil-rock corre-lation showed that the oils were mainly derived from Es4 member (with buried depth >2700 m) of Niuzhuang and Guangli Sags within normal oil window though there is a little amount of mixed immature oils. Quantification of mixed oils with different sources indicated that mature oils ac-count for about 80% of the total oils discovered and immature oils for only 20%. Migration of the oils sourced from the sags is controlled by predominant hydrocarbons migration passages de-termined by faults, unformalities and favored sandstone reservoir. Results of the origin and mi-gration models for the oils have been recently further testified by considerable quantity of oils discovered in the Bamianhe area, which is obviously playing an important role in guiding further oil exploration.

关键词： Bamianhe Oilfield, mixed oil, oil-rock correlation, oil migration, oil-pool forming dynamics.

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Biogas charging and dissipating process and its accumulation in the Sebei gasfield,Qaidam Basin,china

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Science china Earth Sciences 2008年第S1期51卷 36-44页

作者： JIN Qiang 1,CHENG FuQi 1,2 ,SU AiGuo 3 ,ZHU GuangYou 3 ,WANG Li 1 &CAO Qian 1 1 china University of petroleum,dongying,Shandong 25.061,china 2 Geological Institute of shengli Oilfield,SINOPEC,dongying,Shandong 257015,china 3 petroleum exploration and Development Institute,Petrochina,Beijing 100083,china china Univ Petr Shandong 257061 Peoples R China SINOPEC Geol Inst Shengli Oilfield Shandong 257015 Peoples R China Petrochina Petr Explorat & Dev Inst Beijing 100083 Peoples R China

The Sebei gasfield is the largest biogas accumulation found in china and many reservoirs and seal rocks superposed on a syndepositional anticline in *** biogas charging and dissipating process and its distribution have been a research focus for many *** authors suggest a diffusing and accumulating model for the biogas,as they find that the shallower the gas producer,the more methane in the biogas,and the lighter stable carbon isotope composition of *** on the diffusing model,diffused biogas is quantitatively estimated for each potential sandy reservoir in the gasfield,and the gas charging quantity for the sandy reservoir is also calculated by the diffused gas quantity plus gas reserve in-place.A ratio of diffusing quantity to charging quantity is postulated to describe biogas accumulating state in a sandy reservoir,if the ratio is less than 0.6,the reservoir forms a good gas-pool and high-production layer in the gasfield,which often occurs in the reservoirs deeper than 900 m;if the ratio is greater than 0.6,a few gas accumulated in the reservoir,which frequently exists in the reservoirs shallower than 900 ***,a biogas accumulation model is built up as lateral direct charging from gas source for the sands deeper than 900 m and indirect charging from lower gas-bearing sands by diffusion at depth shallower than 900 *** this charging and diffusion quantitative model,the authors conducted re-evaluation on each wildcat in the central area of the Qaidam Basin,and found many commercial biogas layers.

关键词： biogas charging and diffusing model relative dissipated quantity Qaidam Basin

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Numerical simulation and application of three-dimensional oil resources migration-accumulation of fluid dynamics in porous media

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Science china(Physics,Mechanics & Astronomy) 2008年第8期51卷 1144-1163页

作者： YUAN YiRang1 & HAN YuJi2 1 Institute of Mathematics,Shandong University,Ji’nan 25.100,china 2 Physical exploration Institute of shengli petroleum Administration,dongying 25.022,china Institute of Mathematics Shandong University Ji’nan 250100 China Physical exploration Institute of shengli petroleum Administration Dongying 257022 China

Numerical simulation of oil migration and accumulation is to describe the history of oil migration and accumulation in basin evolution. It is of great value in evaluation of oil resources and determination of the location and amount of oil deposits. Based on such actual conditions as the effects of fluid mechanics in porous media and 3-dimensional geology characteristics,a kind of modified method of second order upwind finite difference fractional steps implicit interactive scheme was put forward. As for the actual problem of dongying hollow,Huimin hollow,Tanhai region and Yangxin hollow in shengli petroleum Oil Field,a numerical simulation test was carried out,and the result is basically coincident with the actual conditions. For the model problem,optimal order estimates were derived. Thus the well-known problem on oil resources was solved.

关键词： nonlinear mechanics of immiscible flow 3-dimensional migration-accumulation of oil resources upwind fractional steps numerical simulation numerical analysis

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Geochemical characteristics and origin of gases from the Upper,Lower Paleozoic and the Mesozoic reservoirs in the Ordos Basin,china

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Science china Earth Sciences 2008年第S1期51卷 183-194页

作者： HU AnPing 1 ,Li Jian 2 ,ZHANG WenZheng 3 ,LI ZhiSheng 2 ,HOU Lu 4 &LIU QuanYou 5.1 Department of Earth Sciences,Zhejiang University,Hangzhou 310027,china 2 Langfang Branch,Reasearch Institute of petroleum exploration and Development,Petrochina,Langfang 065.07,china 3 Institute of exploration and Development,Petrochina Changqing Oilfield Company,Xi’an 710021,china 4 University of petroleum,Beijing102249,china 5.Petrochina Research Institute of petroleum exploration and Development,Beijing 100083,china 1. Department of Earth Sciences Zhejiang University Hangzhou 310027 China2. Langfang Branch Reasearch Institute of Petroleum Exploration and Development PetroChina Langfang 065007 China3. Institute of Exploration and Development PetroChina Changqing Oilfield Company Xi’an 710021 China4. University of Petroleum Beijing 102249 China5. PetroChina Research Institute of Petroleum Exploration and Development Beijing 100083 China

The Ordos Basin,the second largest sedimentary basin in china,contains the broad distribution of natural gas *** far,several giant gas fields have been discovered in the Upper and Lower Paleozoic in this basin,each having over 1000×10 8 m 3 of proven gas reserves,and several gas pools have also been discovered in the *** paper collected the data of natural gases and elucidated the geochemical characteristics of gases from different reservoirs,and then discussed their *** hydrocarbons preserved in the Upper Paleozoic,the elevatedδ13C values of methane,ethane and propane indicate that the gases would be mainly coal-formed gases;the singular reversal in the stable carbon isotopes of gaseous alkanes suggests the mixed gases from humic sources with different *** the Lower Paleozoic,theδ13C 1 values are mostly similar with those in the Upper Paleozoic,but theδ13C 2 andδ13C 3 values are slightly lighter,suggesting that the gases would be mixing of coal-type gases as a main member and oil-type *** are multiple reversals in carbon isotopes for gaseous alkanes,especially abnormal reversal for methane and ethane(i.e.δ13C 1 >δ13C 2 ),inferring that gases would be mixed between high-mature coal-formed gases and oil-type *** the Mesozoic,the δ13Cvalues for gaseous alkanes are enriched in 12C,indicating that the gases are mainly derived from sapropelic sources;the carbon isotopic reversal for propane and butane in the Mesozoic is caused by microbial oxidation and mixing of gases from sapropelic sources with different *** contrast to the Upper Paleozoic gases,the Mesozoic gases are characterized by heavier carbon isotopes of iso-butane than normal butane,which may be caused by gases generated from different kerogen types. Finally,according toδ13C 1 -Ro relationship and extremely low total organic carbon contents,the Low Paleozoic gases would not be generated from the Ordovician source as a main gas source,bycontrast, the Upper Pale

关键词： Ordos Basin natural gas chemical composition carbon isotope genesis

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Hydrocarbon accumulation in network and its application in the continental rift basin

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Science china Earth Sciences 2008年第S2期51卷 88-100页

作者： PANG XiongQi1,2,CHEN DongXia1,ZHANG ShanWen3,HAO Fang1,LIU Zheng1,LIU KeYu3,SONG GuoQi4,WANG YongShi4,LUO XiaoRong5.& WU XiaoChun61 State Key Laboratory of petroleum Resource and Prospecting,Chinese University of petroleum,Beijing 102249,china 2 Basin and Reservoir Center,Chinese University of petroleum,Beijing 102249,china 3 SINOPEC {5. Oilfield,dongying 25.05.,china 4 CSIRO petroleum,P. O. Box 1130,Bentley,WA 6102,Australia 5.Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100029,china 6 china National petroleum Corporation,Beijing 100724,china Chinese Univ Petr State Key Lab Petr Resource & Prospecting Beijing 102249 Peoples R China Chinese Univ Petr Basin & Reservoir Ctr Beijing 102249 Peoples R China SINOPEC shengli Oilfield Dongying 257051 Peoples R China CSIRO Petr Bentley WA 6102 Australia Chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China china Natl Petr Corp Beijing 100724 Peoples R China

The concept of hydrocarbon accumulation in network was presented on basis of the overall analysis of the formation and evolution characteristics of the continental faulted basin and of the systemic re-search on the major controlling factors on the hydrocarbon accumulation. The hydrocarbon accumu-lation in network can be defined as hydrocarbon accumulation in a three-dimensional network system which is constituted by the hydrocarbon migration passages under multiple dynamics,following the hydrocarbon generation from source rocks. The research shows that the hydrocarbon accumulation in network is composed of four elements,i.e.,hydrocarbon source (source rock kitchen),hydrocarbon accumulation terminal (trap),network pathway connecting source and terminal (transporting system),and network potential driving hydrocarbon migration in the network pathway (migration dynamics). Compared with other networks,hydrocarbon accumulation in network has three basic characteristics: the irreversible geological process of material and information flow in the network; the loss of material and information in the flow process in the network; the multiple dynamics in the flow process. Interac-tion of all the elements in the geological process can be called hydrocarbon accumulation in network. There are three basic models for hydrocarbon accumulation in network,that is,hydrocarbon accumu-lation in the network source area,hydrocarbon accumulation in the network pathway,and hydrocarbon accumulation in the network terminal. The key in the application of the hydrocarbon accumulation models in network in practice is to confirm the major accumulation stage and the function range of the four elements controlling the hydrocarbon firstly,to predict the profitable accumulation region by su-perposition of the favorable areas confirmed by four elements consequently,and to evaluate the oil-bearing property of the trap as well as confirm drilling targets. This paper takes the dongying De-pression in the

关键词： continental rift basin hydrocarbon accumulation theory hydrocarbon network hydrocarbon accumulation in network Bohai Bay Basin

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Quantitative description of characteristics of high-capacity channels in unconsolidated sandstone reservoirs using in situ production data

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petroleum Science 2010年第1期7卷 106-111页

作者： Wang Xuezhong Wang Jianyong Wang Chuanfei Zeng Liufang Liu Xuewei Xinjiang exploration ＆ Production Center Shengli Oilfield Company Sinopec Dongying Shandong 257000 China Sinopec Beijing 100728 China china University of petroleum Dongying Shandong 257061 China Gudong Oil Production Plant Shengli Oilfield Company Sinopec Dongying Shandong 257237 China Institute of Porous Flow ＆ Fluid Mechanics CNPC ＆ Chinese Academy of Sciences Langfang Hebei 065007 China

Quantitative description of the high-capacity channels in unconsolidated sandstone reservoirs, into which water was injected to improve oil recovery, is a hot topic in the field of reservoir development. This paper presents a novel approach to describing quantitatively the characteristics of connected macropores in unconsolidated sandstone reservoirs using in situ production data. Based on physical simulation for formation mechanisms of high capacity channels and interwell tracer test data, a mathematical model was established to describe high-capacity channels by grey correlation theory, flow mechanism of fluid in porous media and reservoir engineering, and a program was developed to describe quantitatively the channel characteristics. The predicted results were consistent with field monitoring data （80%）, so this model could be economically and effectively used to identify high-capacity channels.

关键词： High-capacity channel unconsolidated sandstone quantitative description physical simulation interwell tracer grey correlation theory

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Ancient Changjiang channel system in the East china Sea continental shelf during the last glaciation

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Science china Earth Sciences 2005年第11期48卷 1972-1978页

作者： LI Guangxue1,2, LIU Yong1, YANG Zigeng3, YUE Shuhong4, YANG Wenda5.& HAN Xibin1 1. College of Marine Geo-science, Ocean University of china, Qingdao 266003, china 2. Shandong Key Laboratory of Sea Floor Resource and exploration Technique, Qingdao 266003, china 3. Qingdao Institute of Marine Geology, Qingdao 266071, china 4. College of Marine Environment, Ocean University of china, Qingdao 266003, china 5. First Survey Team of Marine Geology, Shanghai bureau of petroleum, Shanghai 201208, china 1. College of Marine Geo-science Ocean University of China 266003 Qingdao China 2. Shandong Key Laboratory of Sea Floor Resource and exploration Technique 266003 Qingdao China 3. Qingdao Institute of Marine Geology 266071 Qingdao China 4. College of Marine Environment Ocean University of China 266003 Qingdao China 5. First Survey Team of Marine Geology Shanghai Bureau of Petroleum 201208 Shanghai China

Based on the data of high-resolution seismic profiles, an ancient river channel sys-tem of the last glaciation occurred along the Zhedong and Xihu depression in the southeast of Hupijiao rise. The distribution of the channel fill system shows that the ancient Changjiang River went through the Changjiang depression into the low land plain of the outside continental shelf during the low sea level cycle of the last glaciation. The big channel fill into Okinawa Trough is not found due to the depletion of the river kinetic energy in the low land plain. The river discharge dispersal was of an important role to the dilution of the northern Okinawa Trough sea at that time. Six ancient river channel systems (A―F), which are main distributaries of ancient Changjiang in the East china Sea continental shelf during the last glaciation, may be buried off the modern Changjiang estuary. The distribution of these channels coincides with the zonal elevations in the sea floor.

关键词： last glaciation, continental shelf plain, Changjiang River, ancient channel fill

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Formation mechanism of carbonate cemented zones adjacent to the top overpressured surface in the central Junggar Basin,NW china

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Science china Earth Sciences 2010年第4期53卷 529-540页

作者： YANG Zhi1,2,ZOU CaiNeng1,3,HE Sheng2,LI QiYan1,HE ZhiLiang3,WU HengZhi5.CAO Feng1,MENG XianLong4,WANG FuRong2 & XIAO Qilin21 State Key Laboratory of EOR,Research Institute of petroleum exploration & Development,Petrochina,Beijing 100083,china 2 Key Laboratory of Tectonics and petroleum Resources of Ministry of Education,china University of Geosciences,Wuhan 430074,china 3 State Key Laboratory of EOR,Research Institute of petroleum exploration & Development,Petrochina,Beijing 100083,china 4 Research Institute of petroleum exploration and Production,SINOPEC,Beijing 100083,china 5.Southwest Branch Company,SINOPEC,Chengdu 61005.,china 1. State Key Laboratory of EOR Research Institute of Petroleum Exploration & Development PetroChina Beijing 100083 China2. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education China University of Geosciences Wuhan 430074 China3. State Key Laboratory of EOR Research Institute of Petroleum Exploration & Development Petrochina Beijing 100083 China5. Southwest Branch Company SINOPEC Chengdu 610051 China4. Research Institute of Petroleum Exploration and Production SINOPEC Beijing 100083 China

Carbonate cemented zones are normally adjacent to the top overpressured surface in the central Junggar Basin,NW *** carbon and oxygen isotopic compositions and petrological investigations of carbonate cements in the carbonate cemented zones indicate that:(1) carbonate cements are composed dominantly of ferrocalcite,ferroan dolomite,and ankerite;(2) carbonate cements are formed under a high temperature circumstance in the subsurface,and organic fluid migration has an important effect on the formation of them;and(3) carbon and oxygen ions in the carbonate cements migrate from the underlying overpressured *** suggests that the occurrence of carbonate cemented zones in this region results from multiple phases of organic fluid expulsion out of the overpressure compartment through geological *** study provides a plausible mechanism of the formation of carbonate cemented zones adjacent to the top overpressured surface in the clastic sedimentary basins,and has an important implication for understanding the internal correlation between the formation of carbonate cemented zones adjacent to top overpressured surface and geofluids expulsion out of overpressured system.

关键词： carbonate cemented zones formation mechanism stable carbon and oxygen isotopic top overpressured surface central Junggar Basin coal-bearing strata

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Gas formation mechanism of marine carbonate source rocks in china

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Science china Earth Sciences 2005年第4期48卷 441-453页

作者： ZHAO Wenzhi1, WANG Zhaoyun1, HE Haiqing2, ZHANG Mingjie3, WANG Hongjun1, WANG Yunpeng4 & QIN Yong5.1. Research Institute of petroleum exploration & Development, Petrochina, Beijing 100083, china 2. Petrochina exploration & Production, Beijing 100011, china 3. Department of Geology, Lanzhou University, Lanzhou 730000, china 4. Guangzhou Geochemical Institute, Chinese Academy of Sciences, Guangzhou 5.0640, china 5. china University of Mining and Technology, Xuzhou 221000, china 1. Research Institute of petroleum exploration & Development 100083 PetroChinaBeijin China 2. Petrochina exploration & Production 100011 Beijing China 3. Department of Geology Lanzhou University 730000 Lanzhou China 4. Guangzhou Geochemical Institute Chinese Academy of Sciences 510640 Guangzhou China 5. china University of Mining and Technology 221000 Xuzhou China

By breaking through the conventional ideology on the study of gas-formation mechanism of source rocks which focused on merely the characteristics of source rocks them- selves, and based on the development and distribution characteristics of marine carbonate source rocks in the medium-to-bottom parts of the Chinese superimposed sedimentary basins as well as various processes in the course of gas generation and reservoir forming, the complex hydrocarbon-generating model of carbonates is established. Such a model concerns not only the “three-stage” gas formation characteristics of carbonates, but also the gas generation process due to a thermal cracking of oil and the re-generation process of gas from heated secondary organic matters during the gas-generation and reservoir-forming course. The high-quality hy- drocarbon generating matter of marine carbonate source rocks determined a high gas-oil ratio and tended to form paleo-oil-reservoirs, representing an enrichment process of organic matters. The thermal cracking of oil in palaeo-oil-reservoirs is an important means for the effective forma- tion of gas reservoirs. The secondary organic matters in carbonate reservoirs may regenerate gas after a secondary deep burial, thus becoming an effective gas source.

关键词： carbonate, three-stage hydrocarbon generation, inhibitive effect of maturity, oil-cracking gas, second-ary asphalt gas.

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Deep seismic reflection profiling revealing the complex crustal structure of the Tongling ore district

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Science china Earth Sciences 2004年第3期47卷 193-200页

作者： L5. Qingtian1, HOU Zengqian1, ZHAO Jinhua1, SHI Danian1, WU Xuanzhi1, CHANG Yinfo1, PEI Rongfu1,HUANG Dongding2 & KUANG Chaoyang2 1. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, china 2. The Sixth Geophysical exploration Brigade, petroleum bureau of East china, Nanjing 210009, china Chinese Acad Geol Sci Inst Mineral Resources Beijing 100037 Peoples R China Petr Bur E china Geophys Explorat Brigade 6 Nanjing 210009 Peoples R China

The deep seismic profiling across the Tongling ore district reveals a complex crustal structure. Strong contrasting dipping layered reflections (4—11 s, TWT),which dominate the lower crust of the northern part of the profile, are interpreted as the underplating of the basalt related to extensional tectonism. In the south of the profile, the Yangtze craton is characterized by strong reflections in the middle crust, showing a distinct two-layer crustal structure. Over the region of the Tongling uplift, there appear the complex arc shape reflections, suggesting folded, faulted and intruded structures, and the transparent zone below them reveals the existence of batholith. The south dipping strong reflections between the upper crust and lower crust (4—7 s, TWT) suggest a detachment between them. The detachment provided space for the magma intrusion, and caused the formation of the batholith. The Yangtze craton has a clear Moho re-flection, while the Tongling uplift has a weak Moho, whereas below the reflective lower crust in the northern part of the profile, there are sub-Moho reflections. The abrupt variation of the Moho characteristics within a short distance indicates the complexity of magmatic activity.

关键词： metallogenic belt, ore district, deep seismic profiling, crustal structure.

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