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Distribution of the indigenous microorganisms and mechanisms of their orientational activation in Daqing oilfield

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Science china Earth Sciences 2009年第S1期52卷 128-134页

作者： XIANG TingSheng1,LIU XiaoBo2.ZHANG Min1,LIU Fang2.LI BaiGuang2.FU HuaE1,ZHAO Li3 & HU WangShui1 1 Department of Geochemistry,Yangtze University,Key Laboratory of exploration Technologies for oil and {2. Resources of Ministry of Education of china,Jingzhou 43402.,china 2.The 2.d oil Production Factory,Daqing 163414,china 3 Daqing Victex Company,Daqing 163411,china 1. Department of Geochemistry Yangtze University Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Education of China Jingzhou 434023 China 2. The 2.d oil Production Factory Daqing 163414 China 3. Daqing Victex Company Daqing 163411 China

The distribution of indigenous microorganisms was surveyed in Block 1 of Daqing oilfield. Based on this survey,the indigenous microorganisms in the formation water were activated with different activator systems at the simulated stratum ecological environment. The changes of the number of bacteria of various physiological groups were determined during the process of activation. Also changes of pH value and composition of gas productions were analyzed at the end of culturing. The results showed that the selected block formation water contained a great number of saprophytic bacteria,hydrocarbon-oxidizing bacteria,fermentative bacteria,methane-producing bacteria and sulfate-reducing bacteria. Under the conditions that the growth of sulfate-reducing bacteria was controlled the block had the potential to enhance oil recovery by activating beneficial bacteria. The growth of sulfate-reducing bacteria can be inhibited through the activation of nitrate-reducing bacteria. The number of nitratereducing bacteria reached 106―107 cells/mL,but sulfate-reducing bacteria reached only 0―45 cells/mL in A system. Methane-producing bacteria can be activated by C,D activators. The relative content of biological methane in the light hydrocarbon gas reached 80% in C,D systems. B activator was conducive to the propagation of acid-producing bacteria,so that the pH value of the culture medium decreased from 7.5 to around 5.0. Hydrocarbon-oxidizing bacteria can be activated by various activator systems. There was low molecular light hydrocarbon in gas production according to the analysis of gas chromatograph. According to the content of methane and the number of methane-producing bacteria,methane only can be generated through activating methane-producing bacteria. By choosing different activator systems,various populations of indigenous microorganisms can be activated accordingly.

关键词： indigenous microorganisms metabolites MEOR(microbial enhanced oil recovery) mechanisms

The controlling factors of oil and gas charging and accumulation of Puguang gas field in the Sichuan Basin

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Science Bulletin 2007年第S1期 193-200页

作者： MA YongSheng1, CAI XunYu1 & GUO TongLou2.1 exploration Company, SINOPEC, Beijing 10002., china 2.exploration Company in Southern china, SINOPEC, Chengdu 610041, china

Combined with oil and gas transport and accumulation, structure-lithology evolution history, and with geochemistry and synthesizing geology methods, this paper studies the oil and gas discharge history of Puguang large scale gas field and the main controlling factors of oil accumulation. The natural gas in Puguang gas field is mainly coal-derived gas and oil-racked gas. The main hydrocarbon is Upper Permian coal mudstone and Lower Silurian mud shale with organic material. Puguang gas field has gone through discharge and adjustment 3 times, and it has favorable palaeostructure location, high quality dredge and effectively conserving conditions.

关键词： Puguang gas field oil and gas charging carbonate rock main controlling factors of oil accumulation Sichuan Basin

Formation and evolution of the Chinese marine basins

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Science Bulletin 2007年第S1期 1-11页

作者： JIA ChengZao1, LI BenLiang2. 3, ZHANG XingYang3 & LI ChuanXin1 1 Research Institute of Petroleum exploration and development, Petro{2., Beijing 100083, china 2.Resources and Information Institute, china University of Petroleum, Beijing 102.49, china 3 Central Laboratory of Petroleum Geology Research, Research Institute of Petroleum exploration and development, Beijing 100083, china

There are plenty of petroleum resources in the Chinese marine basins, which will be the potential exploration regions of petroleum in the 2.st century. The formation and evolution of the Chinese marine basins have mainly undergone two major tectonic epochs and five tectonic evolution stages. The first major tectonic epoch is the early Paleozoic plate divergence and drifting epoch during which the marine basins were formed, and the second one is the late Paleozoic plate convergence and collision epoch during which the pre-existent marine basins were superimposed and modified. The five tectonic evolution stages include: ① the drifting of micro-continental plates in Oceans and the formation of marine basins mainly filled with carbonate rocks during Proterozoic-Middle Carboniferous; ② the northward collage and convergence of continental plates and the development of the paralic sedimentary basins during Late Carboniferous-Middle Triassic; ③ the tectonically stabilized stage after the plate collage and the superimposition of lacustrine basins controlled by the inland subsidence during Late Triassic-Early Cretaceous; ④ the stage of the inland deformation and successive deep burial, uplifting, erosion or breakage of marine basins influenced by the plate tectonic activities of Neo-Tethys Ocean and the West Pacific developed in Late Cretaceous-Paleocene; ⑤ the stage of the foreland compression and basin-range coupling in the margin of the marine basins caused by the collision between India and Eurasia Plates and its long-distance effect since Neocene. The process of the tectonic evolution has controlled the petroleum geologic characteristics of Chinese marine basins, and a material foundation for the formation of {2. and gas reservoirs has been built up via the formation of Paleozoic ma- rine basins, and the Mesozoic-Cenozoic tectonic superimposition and modification have controlled the key conditions of hydrocarbon accumulation and preservation. From the Late Proterozoic to

关键词： marine basin plate tectonics tectonics evolution petroleum exploration

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对翁氏预测模型的推导及应用

天然气工业 1996年第2期16卷 22-26页

作者：陈元千中国石油天然气总公司石油勘探开发科学研究院

基于概率统计中的x^2.布,对原翁氏预测模型进行了系统的推导,得到了预测油气田产量、可采储量、最高年产量及其发生时间的广义模型,并提出了求解模型的线性试差法,并在两个油田进行了实际应用。

关键词：产量可采储量油气田翁氏预测模型

A NEW METHOD FOR PREDICTION OF PRODUCTIVITY OF FRACTURED HORIZONTAL WELLS BASED ON NON-STEADY FLOW

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Journal of Hydrodynamics 2007年第4期19卷 494-500页

作者： LEI Zheng-dong CHENG Shi-qing LI Xiang-fang XIAO Hua-ping Research Institute of Petroleum exploration and development Beijing 100083 China CMOE Key Laboratory of Petroleum Engineering China University of Petroleum Beijing 102249China BeiJing Huayou Natural gas Co. Itd Beijing 100100 China

Hydraulic fracturing technologies of horizontal well are important ways to develop oil-gas field with low permeability. Productivity forecast of fractured horizontal wells is a difficult problem of hydraulic fracturing technologies. Basing on non-steady flow of fractures fluid during production, applying potential function principles, superposition principle and mathematical method for solving, coupling of seepage flow in the formation and pipe flow in the well bore, a new model on multi-fracture interference productivity forecast of fractured horizofltal well is established in this article. The results indicate the coincidence rate between this model and practice is high. The pressure loss in the horizontal well bore has definite influence on the production status of fractured horizontal wells. The productions of different fractures in horizontal well bore are unequal, the productions of outer fractures are higher than middle fractures; the pressure in the well bore shows an uneven distribution, the pressure declines gradually from finger tip to heel end. Asymmetry of fractures may make productivity of fractured horizontal wells decline. The conclusions are instructive in designing fractured horizontal well for low permeability reservoir.

关键词： horizontal well fracturing productivity couple non-steady flow

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,{2. 2.Research Institute of Petroleum exploration and development, Beijing 100083,{2. 3 Testing Center of Petroleum Geology, Research Institute of Petroleum exploration and development, Beijing 100083,{2. 4 Chengdu Institute of Geology and Mineral Resources, Chengdu 610082.{2.

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―2.0 ℃ as induced by tremendously thick sedimentation in the foreland basin of Daba Mountain in Late Jurassic-Cretaceous period. Meanwhile, abundant acid gas like H2. 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

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双曲线递减的简化及确定可采储量的截距法

天然气工业 1994年第4期14卷 32-37页

作者：陈元千中国石油天然气总公司石油勘探开发科学研究院

双曲线递减对于产量预测是一个非常有用的方法。Ａｒｐｓ（阿浦斯）的产量递减分析法，在油气藏工程计算中得到了广泛的应用，当根据递减阶段的实际数据判定递减类型之后，可建立相应的相关公式，并对油气藏或油气井的未来产量、累积产... 详细信息

双曲线递减对于产量预测是一个非常有用的方法。Ａｒｐｓ（阿浦斯）的产量递减分析法，在油气藏工程计算中得到了广泛的应用，当根据递减阶段的实际数据判定递减类型之后，可建立相应的相关公式，并对油气藏或油气井的未来产量、累积产量能够进行有效的预测。文章对Ａｒｐｓ的双曲线递减给予简化，得到了一个累积产量和产量变化关系的通式，当取递减指数ｎ＝０和０．５时，可分别得到指数递减和修正的卡彼托夫递减的累积产量和产量的关系式。同时提出了利用不同ｎ值的直线截距法，确定油气藏（田）递减阶段的最大累积产量和可采储量。

关键词：双曲线递减储量截距法油气田

对我国石油科技期刊出版工作中苦干标准化问题的讨论

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天然气工业 1995年第4期15卷 73-79页

作者：陈元千中国石油天然气总公司石油勘探开发科学研究院

对我国石油科技期刊出版工作中苦干标准化问题的讨论陈元千（中国石油天然气总公司石油勘探开发科学研究院）【编者按】陈元千教授撰写的这篇讨论性文章，对我国石油科技期刊出版工作中的若干问题提出了许多宝贵的意见和建议，值得认真... 详细信息

对我国石油科技期刊出版工作中苦干标准化问题的讨论陈元千（中国石油天然气总公司石油勘探开发科学研究院）【编者按】陈元千教授撰写的这篇讨论性文章，对我国石油科技期刊出版工作中的若干问题提出了许多宝贵的意见和建议，值得认真一读。同时我们也欢迎大家能参与这一...

关键词：科技期刊出版标准化石油专业中国

Types of Organic Fades and Source Rock Assessment of the Coal-Measure Mudstone in the Turpan-Hami Basin

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Acta Geologica Sinica(English Edition) 1998年第2期72卷 169-179页

作者： ZHAO Changyi, DU Meili, SHAO Longyi, CHEN Jianping,CHENG Kerning and HE ZhonghuaResearch Institute of Petroleum exploration and development,{2. national Petroleum corporation, 2. Xueyuan Rd., Beijing 100083Beijing Graduate School of china University of Mining and Technology,11 Xueyuan Rd., Beijing 100083

This paper discusses the enviromental characteristics of carbonaceous mudstone and mudstone (coal-measure mudstone in short) of the Early and Middle Jurassic in the Turpan-Hami basin, which were formed in swamps. Through the organic facies study of the coal-measure mudstone in this area, the authors clarify that the flowing-water swamp is the most advanced organic facies belt. Furthermore, according to the practical materials of coal-measure mudstone in the area and with the evaluation criteria of lacustrine mudstone in the past, the authors have established the integrated symbol systems from the abundance of organic matter and the type of organic matter, which can be used in the source rock evaluation of the coal-measure mudstone.

关键词： hydrocarbon from coal coal-measure mudstone organic facies source rock assessment Turpan-Hami basin