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Biogas charging and dissipating process and its accumulation in the Sebei gasfield,Qaidam basin,China

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 2.7061,China 2.Geological Institute of Shengli Oilfield,SINOPEC,Dongying,Shandong 2.7015,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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Characteristics of transfer zones under the influence of preexisting faults and regional stress transformation:Wenchang A subsag,Zhujiang River Mouth basin,northern South China Sea

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Journal of Oceanology and limnology 2024年第3期42卷 744-759页

作者： Wei li Mingyue CAO Meifang MENG Caiwei FAN Hui li Jia li Wanqiu WU Ruiqing QIN Xingan li Yiming liU State Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China School of Geosciences China University of Petroleum(East China)Qingdao 266580China Zhanjiang Branch China National Offshore Oil Corporation CompanyZhanjiang 524057China

A transfer zone in rift basins preserves important information on regional tectonic evolution and plays significant roles in hydrocarbon *** on the systematic analysis of 3D seismic data and hydrocarbon accumulation conditions,the geometry,kinematics,and reservoir control of a large synthetic overlapping transfer zone in the south of the Wenchang A subsag in the Zhujiang(Pearl)River Mouth basin were *** indicate that the development and evolution of the transfer zone was controlled by the interaction between pre-existing faults and regional stress *** intense rifting of the main faults of the transfer zone controlled the development of source rocks and faultcontrolled slope break *** strike-slip overprint since the Oligocene is conducive to the formation of a large-scale fault-anticline trap,and the secondary faults in the transfer zone contribute to the hydrocarbon *** conjugate intersection area of the NE-and NW-trending faults offers more opportunity for hydrocarbon migration and accumulation.

关键词： transfer zone pre-existing fault regional stress transformation Cenozoic Wenchang A Subsag Zhujiang(Pearl)River Mouth basin

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Late stage thermal history of the Songliao basin and its tectonic implications: Evidence from apatite fission track (AFT) analyses

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Science China Earth Sciences 2007年第10期50卷 1479-1487页

作者： XIANG CaiFu1,2., FENG ZhiQiang3, PANG XiongQi1,2. WU HeYong3 & li JunHong1,2.1 basin and {2. Research center, China university of petroleum, beijing 102.4., China 2.Key Laboratory for Hydrocarbon Accumulation in China university of petroleum, Ministry of Education, beijing 102.4., China 3 Prospecting and Exploration Institute of Daqing Oil Field, Daqing 163458, China 1. basin and reservoir Research {2. China University of Petroleum Beijing 102249 China 2. Ministry of Education Key Laboratory for Hydrocarbon Accumulation in China University of Petroleum Beijing 102249 China 3. Prospecting and Exploration Institute of Daqing Oil Field Daqing 163458 China

Apatite Fission Track (AFT) data from the Songliao basin indicates that the late stage tectonic movements in the Songliao basin have zoning in space and episodes in time. The late stage tectonic movements started from the east part of the basin and migrated westward. AFT ages in the east part of the basin are older than those in the west part of the basin, suggesting that the uplift occurred earlier in the east than in the west. The denudation thickness in the east part of the basin is significantly greater than that in the centre and west. The thermal history evolved two episodes of rapid cooling and subsequent slow cooling processes. Age-depth relationship derived from the AFT data indicates a four-episode denudation history. Further Monte Carlo random simulation of the AFT data reveals the four changing points of the thermal evolution at 65 Ma, 43.5 Ma, 2. Ma and 15 Ma, respectively. The uplifting and denudation rates from different episodes of evolution are proportional to the plate convergence rate. Based on the above analyses and the regional geologic background, it is concluded that the late stage thermal events in the Songliao basin are the far field response to the subduction of the Pacific Plate under the Eurasian Plate. The first episode of the rapid cooling probably started at the end of the Nenjiang Formation, climaxed at the end of the Cretaceous and ceased at the Late Eocene. The subsequent slow cooling lasts another 15 Ma. The first episode of the evolution is the far field response to the major episode of the Yanshan Movement and subsequent series of the tectonic reorganization, especially the directional change of the Pacific Movement and also the subduction of the Indian Plate underneath the Eurasian Plate. While the second episode of the evolution is the far field response to the extension and closure of the Sea of Japan. Extension led to the migration and converging of the mantle heat flow to the Sea of Japan and resulted in the rapid cooling of

关键词： apatite fission track, late stage tectonic movement, episodic movement, plate tectonics, Songliao basin

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Hierarchy modeling of subsurface palaeochannel reservoir architecture

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Science China Earth Sciences 2008年第S2期51卷 126-137页

作者： WU ShengHe1,YUE Dali1,liU JianMin2.SHU Qinglin2.FAN Zheng1,3 & li YuPeng1 1 Earth Sciences and Geoinformatics School,China university of petroleum,beijing 102.4.,China 2.SINOPEC Shengli Oilfield Co. Ltd.,Dongying 2.7000,China 3 beijing Telon High-tech Corporation,beijing 100085,China China Univ Petr Earth Sci & Geoinformat Sch Beijing 102249 Peoples R China SINOPEC Shengli Oilfield Co Ltd Dongying 257000 Peoples R China beijing Telon Hightech Corp Beijing 100085 Peoples R China

The studies on fluvial reservoir architecture are mainly aimed at outcrop and modern deposition,but rarely at the subsurface reservoir,so there are few effective methods to predict the distribution of subsurface reservoir architectures. In this paper,taking the meandering river reservoir of Guantao formation Gudao Oilfield,Jiyang depression,Baohai Gulf basin,East China as an example,the archi-tectural modeling method of complex meandering belt reservoir is proposed,that is hierarchy con-straint,pattern fitting and multi-dimensional interaction. Architectures of meandering river reservoir can be divided into three hierarchies: meandering channel sandbody,point bar and lateral accretion body. Different hierarchies of the quantitative architecture pattern are fitted to subsurface well data (including dynamic monitoring data) in different hierarchies through one-dimensional hole,2. profiles and plane and 3D space,which are verified by each other. And then 3D model in different hierarchies is established. At the same time,the quantificational relationship between width of active river and the scale of point bar is set up,and the scale of lateral accretion sand body and shale beddings is con-firmed with horizontal well data. The study not only has significant meaning on the development of geology,but also can improve the oilfield exploitation greatly.

关键词： reservoir architecture hierarchical modeling meandering river point bar lateral accretion body

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鄂尔多斯盆地罗庞塬地区长7沉积微相研究

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云南化工 2024年第2期51卷 149-154页

作者：宁波李杰马钰凯延长油田股份有限公司勘探开发技术研究中心陕西延安716000

罗庞塬地区长7储层底部广泛发育的张家滩高阻泥岩,为中生界优质烃源岩,源储接触关系明显,砂体含油饱和度高,是勘探开发的重要储层。以岩心观察的岩石相标志及测井相分析为基础,通过地层砂地比、单井相剖面的相序分析,对鄂尔多斯盆地罗... 详细信息

罗庞塬地区长7储层底部广泛发育的张家滩高阻泥岩,为中生界优质烃源岩,源储接触关系明显,砂体含油饱和度高,是勘探开发的重要储层。以岩心观察的岩石相标志及测井相分析为基础,通过地层砂地比、单井相剖面的相序分析,对鄂尔多斯盆地罗庞塬地区长7储层沉积相类型及发育规律进行了综合研究。结果表明,其主要沉积体系属于河流三角洲相和湖泊相沉积体系,发育三角洲前缘亚相和深湖-半深湖亚相,主要沉积微相类型包括有水下分流河道、水下天然堤、分流间湾、浊积水道、湖泥。根据沉积微相展布和演化规律可以得出研究区的沉积模式。

关键词：沉积微相罗庞塬长7 浊积

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Genesis of ultra-deep dolostone and controlling factors of largescale reservoir:A case study of the Sinian Dengying Formation and the Cambrian Longwangmiao Formation in the Sichuan {2.

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Science China Earth Sciences 2024年第7期67卷 2352-2382页

作者： Xi li Guangyou ZHU Zhiyao ZHANG PetroChina Research Institute of petroleum Exploration and Development Beijing 100083China School of Geosciences Yangtze UniversityWuhan 430100China School of Earth Resoures China University of GeosciencesWuhan 430074China

This paper investigates the origin of ultra-deep dolostone and the factors influencing large-scale dolostone reservoirs,focusing on the Sinian Dengying Formation and the Cambrian Longwangmiao Formation in the Sichuan *** study involves petrology,microscale X-ray diffraction,trace element analysis,and C-O-Sr-Mg isotope experiments to provide a detailed *** research findings indicate that the Dengying and Longwangmiao formations comprise six types of matrix dolostone and four types of *** Dengying Formation,which developed under a sedimentary background of a restricted platform,contains special microbial and microcrystalline *** dolomite grains are small(2.)Mg value is small(Min=-2.31‰).Powder crystal,fine-crystalline,and calcite dolostones with coarser and more ordered crystals exhibit similar δ^(13)C and^(87)Sr/^(86)Sr values to microbial and microcrystalline *** the sedimentary period of the Dengying Formation,ancient marine conditions were favorable for microbial *** induced the direct precipitation of primary dolomite in seawater,forming microbial and microcrystalline dolostones during the seawater diagenesis *** the subsequent diagenesis period,dolostones underwent the effects of dissolution-recrystallization,structures,and hydrothermal *** resulted in the formation of dolostone with coarser crystals,a higher degree of order,and various types of *** Longwangmiao Formation was developed in an interplatform beach characterized by special particle *** particle dolostone has a large grain size(>30μm),high order degree(Min=0.7),small unit cell parameters,high Na content

关键词： Ultra-deep layers Dolostone Supercontinent evolution Microscale geochemistry Dengying Formation Longwangmiao Formation Sichuan basin

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Controlling Factors Affecting Pressure Differential Development of the Upper Paleozoic Gas reservoir in the Sulige and Yulin Area of the Ordos basin

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地学前缘 2009年第S1期16卷 126-127页

作者： Hao Xu~1,Junfeng Zhang~2.Chengzao Jia~3,Dazhen Tang~1,Ming li~3,Wenzhong Zhang~1 1.Key Laboratory of Marine reservoir Evolution and Hydrocarbon Accumulation Mechanism,Ministry of Education,China {2. of Geosciences(beijing),beijing 100083,China. 2.PetroChina Exploration and Production Company,beijing 10072.,China 3.Research Institute of petroleum Exploration & Development,beijing 100083,China

The origin and distribution of Upper Paleozoic reservoirs pressure in mid-northem Ordos basin has attracted widespread attention in recent *** reservoir pressure of Sulige area shows characteristics of basically subnormal pressure,and the reservoir pressure of Yulin area shows characteristics of basically normal hydrostatic *** the sense of structural location,

关键词： Ordos basin Sulige area Yulin area formation pressure controlling factors

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Mechanical characteristics and reservoir stimulation mechanisms of the Gulong shale oil reservoirs, the northern Song{2.ao basin

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petroleum Science 2024年第3期21卷 2023-2036页

作者： Si-Wei Meng Jia-Ping Tao Tian-Jiao li Dong-Xu li Su-ling Wang liu Yang Xin liu li-Hao liang He liu PetroChina Research Institute of petroleum Exploration Development Beijing100083China National Key Laboratory of Continental Shale Oil Daqing 163002HeilongjiangChina Dalian university of Technology Dalian116024LiaoningChina PetroChina Daqing Oilfield Co.Ltd. Daqing163002HeilongjiangChina Northeast petroleum university Daqing163002HeilongjiangChina China university of Mining and Technology(beijing) Beijing100083China

Shale oil of the Qingshankou Formation of the Gulong Sag,the northern Songliao basin,represents the first attempt at large-scale development of pure-shale-type shale oil in *** integrating the multiscale refined {2. characterization with macro-micro-scale mechanical testing,it is clarified that the Gulong shale is characterized by high clay mineral content,high rock plasticity,highly-developed bedding,and prominent mechanical anisotropy.A three-dimensional(3D)fracture propagation model of hydraulic fracturing was built for the Gulong shale,which fully captures the hydraulic fracture distribution pattern affected by the high bedding density,in-situ stress,and fracturing treatment *** research showed that due to influences of bedding,hydraulic fracturing in the Gulong shale forms a complex fracture morphology featuring the main fracture with multiple perpendicular branches that have different lengths(like the outdoor directional TV antenna);however,the vertical propagation of fractures is inhibited,and the fracture height is commonly less than 10 *** limited stimulated {2. volume(SRV)is the main problem facing the fracturing stimulation of the Gulong shale *** density has vital effects on fracture morphology,so case-specific fracturing designs shall be developed for shale intervals with different bedding development *** {2.s with welldeveloped bedding,it is suggested to properly increase the perforation cluster spacing and raise the volume and proportions of viscous fluids of the pad,so as to effectively promote vertical fracture propagation and improve {2. stimulation *** study integrates multi-scale fine {2. characterization and macro-micro-scale mechanical testing,as well as the construction and numerical simulation of hydraulic fracturing models for high-density layered shale {2.s,providing a new approach and methodological framework for the fracturing research of high-density layer

关键词： Shale oil Hydraulic fracturing High bedding density Fracture propagation model

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A Study on Identification of Conglomerate reservoir Parameters and Oil/Water Beds in Ke82.Well Areas of Junggar basin

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Journal of China university of Geosciences 2002年第4期13卷 338-344页

作者： Wang Guiwen Zhang Qing li Mingrui Resources and Information Institute, university of petroleum,{2. Resources and Information Institute University of Petroleum Beijing 102249

This paper is mainly about the calculation of reservoir parameters and theinterpretation method for identifying oil/water beds in Ke82.well areas of Junggar basin. It isdifficult to determine the reservoir parameters with common logging methods such as core calibrationlog because of the diversity of minerals and rocks and the complexity of pore structures in theconglomerate reservoir of Junggar basin. Optimization logging exploration is a good method todetermine the porosity by establishing the multi-mineral model with logging curves based on theintegration of geological, core and well testing data. Permeability is identified by BP algorithm ofneural network. Hydrocarbon saturation is determined by correlating Archie's and Simandouxformulas. Comparing the exploratory result and core data, we can see that these methods areeffective for conglomerate logging exploration. We processed and explained six wells in the Ke82.ell areas. And actual interpretation has had very good results, 85 % of which conform to welltesting data. Therefore, this technique will be effective for identifying conglomerate parameters.

关键词： reservoir parameters log interpretation model conglomerate reservoir junggar basin

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Characteristics,genesis and accumulation history of natural gas in Hetianhe gasfield,Tarim basin,China

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Science China Earth Sciences 2008年第S1期51卷 84-95页

作者： WANG ZhaoMing 1 ,WANG QingHua 1 ,ZHAO MengJun 2.,li Yong 1 &XU ZhiMing 3 1 Tarim Oilfield Company,PetroChina,Kuerle 841000,China 2.Research Institute of petroleum Exploration&Development,PetroChina,{2. 100083,China 3 Southwest petroleum Institute,Nanchong 637001,China PetroChina Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China PetroChina Tarim Oilfield Co Kuerle 841000 Peoples R China SW Petr Inst Nanchong 637001 Peoples R China

Hetianhe gasfield in Bachu region of the Tarim basin is mainly composed of three reservoir-caprock assembly,namely regional caprock of upper mudstone,middle mudstone and lower mudstone of the Carboniferous and reservoir of Bachu bioclastic limestone,glutenite and the Ordovician carbonate buried *** gas in Hetianhe gasfield sourced from the Cambrian source *** is thought that gases in Ma4 well block in the east of Hetianhe gasfield are mainly crude-oil cracked gases,while those in Ma3 and Ma8 well blocks in the west are the mixture gases of kerogen cracked gases and crude-oil cracked *** gas is rich in H2. and accumulated in multiply stages as the result of *** accumulation history is divided into three stages,namely accumulation and breakage in the late Caledonian-early Hercynian,migration and dissipation in the late Hercynian and accumulation in Himalayan. The main accumulation of reformed gas reservoir is in Himalayan.

关键词： gas characteristics gas genesis accumulation history Hetianhe gasfield Tarim basin

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