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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 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 University of Petroleum Dongying China Geological Institute of Shengli Oilfield SINOPEC Dongying China Petroleum exploration and Development Institute PetroChina Beijing 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

Influence of Ordovician carbonate reservoir beds in Tarim Basin by faulting

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Science china Earth Sciences 2008年第S2期51卷 53-60页

作者： L XiuXiang1,2.YANG Ning1,2.ZHOU XinYuan3,YANG HaiJun3 & LI JianJiao1,2.1 Faculty of Natural Resource & Information Technology,china University of Petroleum,beijing 102.49,china 2.State Key Laboratory of Petroleum Resource and Prospecting,china University of Petroleum,beijing 102.49,china 3 Tarim Oilfield,petrochina,Korla 841000,china Faculty of Natural Resource & Information Technology China University of Petroleum Beijing China State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing China Tarim Oilfield PetroChina Korla China

The quality of the Ordovician carbonate reservoir beds in the Tarim Basin is closely related to the development of secondary pores,fractures and cavities. Karstification is important in improving the properties of reservoir beds,and karstification related to unconformity has caught wide attention. Compared with the recent research on the unconformity karst reservoir bed improvement,this paper shows a new way of carbonate reservoir bed transformation. Based on field survey,core and slices observation,transformation of Ordovician carbonate reservoir beds by faulting can be classified into three types: (1) Secondary faults and fracturs generated by faulting improved carbonate reservoir bed properties,which were named the Lunnan or Tazhong82.model; (2. upflow of deep geothermal fluids caused by faulting,with some components metasomatizing with carbonate and forming some secon-dary deposit,such as fluorite. It can improve carbonate reservoir bed properties obviously and is named the Tazhong 82.model; and (3) the faulting extending up to the surface increased the depth of supergene karstification and the thickness of reservoir bed. It is named the Hetianhe model. Trans-formation effect of carbonate reservoir beds by faulting was very significant,mainly distributed on the slopes or on the edge or plunging end of the uplift.

关键词： carbonate faulting reservoir transformation Ordovician Tarim Basin

Alkaline diagenesis and its genetic mechanism in the Triassic coal measure strata in the Western Sichuan Foreland Basin,china

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Petroleum Science 2009年第4期6卷 354-365页

作者： Jiang Zaixing Qiu Longwei Chen Guiju College of Energy China University of GeosciencesBeijing 100083China College of Earth Resources and Information China University of PetroleumShandong 257062China Sinopec exploration and production Research Institute Beijing 100083China

The reservoir of the upper Triassic Xujiahe Formation (T3x) in the Western Sichuan Foreland Basin is a set of terrigenous clastic rocks in an environment of coal measure sediments. Diagenesis greatly controls the physical properties of the reservoir through different responses of minerals to acidic and alkaline diagenetic environment. The dissolution of unstable components such as feldspar, rock fragments, carbonate cement, and clay minerals is the major source of secondary pores under acidic diagenesis, while the dissolution of quartz increases the reservoir space in the fault-fold zone of Longmen Mountain and Leikoupo paleo-hills. The dissolution of quartz is a result of cross-formation flow of fluid in the Himalaya epoch and the invasion of alkaline formation water from the Triassic Leikoupo and Jialingjiang formations through fault and fracture systems. In the vertical succession, acidic dissolution occurs at a shallow depth of less than 2.180 m, and alkaline dissolution occurs at a greater depth of more than 2.2.0 m. The reservoir space is formed by the influence of both acidic and alkaline dissolution in the depth interval of 2.180–2.2.0 m.

关键词： Sichuan Basin upper Triassic alkaline diagenesis porosity genetic mechanism

按SEC标准进行油气证实储量评估的基本原则

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石油学报 2004年第2期25卷 19-24页

作者：胡允栋萧德铭王永祥中国地质大学国土资源部油气储量评审中心北京100083 国土资源部油气储量评审中心中国石油勘探与生产分公司

SEC的证实储量定义是在美国上市的石油公司必须遵循的储量标准。该标准归纳起来着重于 10个方面 ,即合理的确定性、现行经济和操作条件、经济生产能力、流体界面和含油气面积、岩石物理资料的证实程度、提高采收率的储量、证实已开发储... 详细信息

SEC的证实储量定义是在美国上市的石油公司必须遵循的储量标准。该标准归纳起来着重于 10个方面 ,即合理的确定性、现行经济和操作条件、经济生产能力、流体界面和含油气面积、岩石物理资料的证实程度、提高采收率的储量、证实已开发储量的界定、证实未开发储量的界定、经济评价以及概率法的应用等。其中 ,在含油气面积的确定原则和提高采收率及其储量方面 ,中、西方评价标准存在着差异。

关键词： SEC标准油气证实储量评估采收率含油气面积天然气石油经济评价概率法

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 102.49,china 2.Southern Oil exploration and Development Company,petrochina,Guangzhou 510640,china 3 Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 5102.0,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

Kinetics of hydrocarbon generation for Well Yingnan 2.gas reservoir,Tarim Basin,china

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Science china Earth Sciences 2008年第S1期51卷 107-114页

作者： XIAO ZhongYao 1,2.,XIAO XianMing 3 ,MA DeMing 4 ,LU YuHong 2.&YANG ChaoShi 2.1 china University of Mining&Technology,beijing 100083,{2. 2.Research Institutes of exploration and Development,Tarim Oilfield Company,petrochina,Korla 841000,{2. 3 Guangzhou Institutes of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,{2. 4 Department of Synthetic Physical-Chemical Prospecting,BGP,Zhuozhou 072.56,{2. china University of Mining & Technology Beijing China Research Institutes of exploration and Development Tarim Oilfield Company PetroChina Korla China Guangzhou Institutes of Geochemistry Chinese Academy of Sciences Guangzhou China Department of Synthetic Physical-Chemical Prospecting BGP Zhuozhou China

Well Yingnan 2.an important exploratory well in the east of Tarim Basin,yields high commercial oil and gas flow in *** gas components and carbon isotopic composition indicate that it belongs to sapropel type *** this region presents many suits of hydrocarbon source rocks,there are some controversies that natural gases were generated from kerogen gas or crude oil cracking gas at *** using the kinetics of hydrocarbon generation and carbon isotope,natural gas of Well Yingnan 2.is composed mainly of crude oil cracking gas,about 72.,it is generated from secondary kerogen gas of Cambrian-Lower Ordovician source rock and crude oil cracking gas of Mid-Upper Ordovician oil *** main oil and gas filling time is 65 Ma later in the Jurassic gas reservoir of Well Yingnan 2.so the gas reservoir belongs to late accumulation and continuous filling type.

关键词： kinetic migration and accumulation process crude oil cracking gas Well Yingnan 2 Tarim Basin

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中国陆上天然气资源的特征及发展策略

石油学报 2004年第5期25卷 1-5页

作者：赵贤正赵政璋李景明李东旭石油大学北京102249 中国石油勘探与生产公司北京100011 中国石油勘探开发研究院廊坊分院河北廊坊065007

对中国陆上天然气资源的基本特征作了全面分析 ,其特征主要表现为 :①天然气勘探程度不高 ,资源相对丰富 ,主要集中分布于四个气区 ;②天然气成藏特点明显 ,类型差别较大 ;③目前天然气勘探进入大发现时期 ,天然气产量大幅度增长 ,储采... 详细信息

对中国陆上天然气资源的基本特征作了全面分析 ,其特征主要表现为 :①天然气勘探程度不高 ,资源相对丰富 ,主要集中分布于四个气区 ;②天然气成藏特点明显 ,类型差别较大 ;③目前天然气勘探进入大发现时期 ,天然气产量大幅度增长 ,储采比暂时较高。根据目前勘探开发状况 ,今后加快天然气发展的策略应是 :①突出重点 ,继续加强天然气勘探 ;②加强提高单井产能的工程技术攻关 ,降低开发成本 ;③转变开发理念 ,提高管理水平 ;④通过体制创新 ,提高开发效益。

关键词：天然气工业发展策略中国天然气资源储量复合圈闭岩性

Genetic types and distribution of shallow-buried natural gases

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Petroleum Science 2010年第3期7卷 347-354页

作者： Gao Yang Jin Qiang Zhu Guangyou College of Geo-resources and Information China University of Petroleum Dongying Shandong 257061 China Petroleum exploration and Development Institute PetroChina Beijing 100083 China

Great volumes of shallow-buried （〈2.000 m） natural gases which are mainly composed of biogases and low-mature gases have been found in the Mesozoic-Cenozoic sedimentary basins in china. Many shallow gas reservoirs in china are characterized by coexistence of biogas and low-mature gas, so identifying the genetic types of shallow gases is important for {2. and development in sedimentary basins. In this paper, we study the gas geochemistry characteristics and distribution in different basins, and classify the shallow gas into two genetic types, biogas and low-mature gas. The biogases are subdivided further into two subtypes by their sources, the source rock-derived biogas and hydrocarbon-derived biogas. Based on the burial history of the source rocks, the source rock-derived biogases are divided into primary and secondary biogas. The former is generated from the source rocks in the primary burial stage, and the latter is from uplifted source rocks or those in a secondary burial stage. In addition, the identifying parameters of each type of shallow gas are given. Based on the analysis above, the distributions of each type of shallow gas are studied. The primary biogases generated from source rocks are mostly distributed in Quaternary basins or modem deltas. Most of them migrate in watersoluble or diffused mode, and their migration distance is short. Reservoir and caprock assemblages play an important role in primary biogas accumulation. The secondary biogases are distributed in a basin with secondary burial history. The oil-degraded biogases are distributed near heavy oil pools. The low-mature gases are widely distributed in shallow-buried reservoirs in the Meso-Cenozoic basins.

关键词： Primary biogas secondary biogas oil-degraded biogas low-mature gas genetic type gas identification gas accumulation distribution

Efficient computation of the compositional model for gas condensate reservoirs

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Communications in Nonlinear Science and Numerical Simulation 2000年第4期5卷 141-146页

作者： Jifu ZHOU, Jiachun LI and Jigen YE (Institute of Mechanics, Chinese Academy of Sciences, beijing 100080, china The Research Institute of Petroleum {2. and Development, beijing 100083, china) (Received December 2. 2.00) Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China Res. Inst. Petrol. Explor./Devmt. Beijing 100083 China

In this paper, a direct method, unsymmetric-pattern multifrontal factorization, for a large sparse system of linear equations is applied in the compositional reservoir model. The good performances of this approach are shown by solving the Poisson equation. And then the numerical module is embedded in the compositional model for simulating X15(3) gas condensate reservoir in KeKeYa gas field, Northwest china. The results of oil/gas reserves, variations of stratum pressure and oil/gas production, etc. are compared with the observation Good agreement comparable to COMP4 model is achieved, suggesting that the present model is both efficient and powerful in compositional reservoir simulations.

关键词： gas condensate reservoir compositional model sparse matrix