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The special sealing mechanism of caprock for Quaternary biogenetic gas in Sanhu area,Qaidam Basin,china

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Science china Earth Sciences 2008年第S1期51卷 45-52页

作者： LI Jian 1 ,YAN QiTuan 1 ,ZHANG Ying 1 ,LIU GuangDi 2 &WANG XiaoBo 1 1 Research Institute of petroleum Exploration and Development-Langfang,Langfang 065007,china 2 university of petroleum,beijing 102249,china Research Institute of petroleum Exploration and Development-Langfang Langfang China university of petroleum Beijing China

The Quaternary biogenetic gas reservoirs in the east of Qaidam Basin have many characteristics such as late forming time,shallow burial depth,low diagenetic grade,high porosity and high permeability and so *** cannot be considered as caprock according to the traditional evaluation ***, the large scale and high efficient biogenetic gas reservoirs of the Qaidam Basin are really formed under these kinds of caprocks,so it does have some specialty in its sealing *** at the special sealing mechanism,some simulating experiments have been *** research results show that the sealing ability of biogenetic gas caprock is related with water saturation,the caprock that is saturated with salt water can effectively block seepage and ***,the multiple reservoir-caprock groups have accumulated sealing effect,causing the formation of big gas *** evaluation method with traditional caprock parameters cannot be adopted in evaluating the study area.

关键词： Qaidam Basin biogenetic gas caprock sealing mechanism diffusion water saturation accumulated sealing

Productivity analysis of horizontal wells intercepted by multiple finite-conductivity fractures

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petroleum Science 2010年第3期7卷 367-371页

作者： Wang Xiaodong Li Guanghe Wang Fei School of Energy Resources China University ofGeosciences Beijing 100083 China china university of petroleum Beijing 102249 China Heriot-Watt university Edinburgh England

Horizontal wells in the anisotropic reservoirs can be stimulated by hydraulic fracturing in order to create multiple finite-conductivity vertical fractures. Several methods for evaluating the productivity of the horizontal wells have been presented in the literature. With such methods, however, it is still difficult to obtain an accurate result. This paper firstly presents the dimensionless conductivity theory of vertical fractures. Then models for calculating the equivalent wellbore radius and the skin factor due to flow convergence to the well bore are proposed after analyzing the steady-state flow in porous reservoirs. By applying the superposition principle to the pressure drop, a new method for evaluating the productivity of horizontal wells intercepted by multiple finite-conductivity fractures is developed. The influence of fracture conductivity and fracture half length on the horizontal well productivity is quantitatively analyzed with a synthetic case. Optimum fracture number and fracture space are further discussed in this study. The results prove that the method outlined here should be useful to design optimum fracturing of horizontal wells.

关键词： Production rate analysis fractured horizontal wells finite-conductivity vertical fractures,fracturing design optimization

Diagenesis and Restructuring Mechanism of Oil and Gas Reservoir in the Marine Carbonate Formation,Northeastern Sichuan:A Case Study of the Puguang Gas Reservoir

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Acta Geologica Sinica(English Edition) 2009年第6期83卷 1173-1181页

作者： DU Chunguo1, 2, WANG Jianjun1, ZOU Huayao2, ZHU Yangming3 and WANG Cunwu4 1 Research Institute of petroleum Exploration and Development, beijing 100034, china 2 petroleum university of china, beijing 102249, china 3 Department of Earth Science, Zhejiang university, Hangzhou 310027, china 4 Faculty of Earth Resources, china university of Geosciences, Wuhan 430074, china Research Institute of petroleum Exploration and Development Beijing 100034 China petroleum university of china Beijing 102249 China Department of Earth Science Zhejiang University Hangzhou 310027 China Faculty of Earth Resources China University of Geosciences Wuhan 430074 China

Based on the technology of balanced cross-section and physical simulation experiments associated with natural gas geochemical characteristic analyses, core and thin section observations, it has been proven that the Puguang gas reservoir has experienced two periods of diagenesis and restructuring since the Late Indo-Chinese epoch. One is the fluid transfer controlled by the tectonic movement and the other is geochemical reconstruction controlled by thermochemical sulfate reduction (TSR). The middle Yanshan epoch was the main period that the Puguang gas reservoir experienced the geochemical reaction of TSR. TSR can recreate the fluid in the gas reservoir, which makes the gas drying index higher and carbon isotope heavier because C2+ (ethane and heavy hydrocarbon) and 12C (carbon 12 isotope) is first consumed relative to CH4 and 13C (carbon 13 isotope). However, the reciprocity between fluid regarding TSR (hydrocarbon, sulfureted hydrogen (H2S) , and water) and reservoir rock results in reservoir rock erosion and anhydrite alteration, which increases porosity in reservoir, thereby improving the petrophysical properties. Superimposed by later tectonic movement, the fluid in Puguang reservoir has twice experienced adjustment, one in the late Yanshan epoch to the early Himalayan epoch and the other time in late Himalayan epoch, after which Puguang gas reservoir is finally developed.

关键词： diagenesis and restructuring mechanism marine carbonate formation thermochemical sulfate reduction Puguang gas reservoir

The evolution and present status of the study on peak oil in china

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petroleum Science 2009年第2期6卷 217-224页

作者： Pang Xiongqi Zhao Lin Feng Lianyong Meng Qingyang Tang Xu LiJunchen china university of petroleum Beijing 102249 China Association for the Study of Peak Oil ＆ Gas-china Beijing 102249 China

Peak oil theory is a theory concerning long-term oil reserves and the rate of oil production. Peak oil refers to the maximum rate of the production of oil or gas in any area under consideration. Its inevitability is analyzed from three aspects. The factors that influence peak oil and their mechanisms are discussed. These include the amount of resources, the discovery maturity of resources, the depletion rate of reserves and the demand for oil. The advance in the study of peak oil in china is divided into three stages. The main characteristics, main researchers, forecast results and research methods are described in each stage. The progress of the study of peak oil in china is summarized and the present problems are analyzed. Finally three development trends of peak oil study in china are presented.

关键词： Peak oil oil resources forecast model trends of study

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中国油气资源潜力及勘探战略

石油学报 2004年第2期25卷 1-6页

作者：潘继平金之钧石油大学盆地与油藏研究中心北京102249 中石化勘探开发研究院北京100083

保障经济的持续高速发展给油气资源勘探开发提出了更高的要求。在石油供求矛盾日益突出的新形势下 ,加强油气勘探 ,实现资源战略接替 ,增储上产 ,增强国内油气资源对经济社会可持续发展的保障能力已迫在眉睫。近年勘探实践和资源评价表... 详细信息

保障经济的持续高速发展给油气资源勘探开发提出了更高的要求。在石油供求矛盾日益突出的新形势下 ,加强油气勘探 ,实现资源战略接替 ,增储上产 ,增强国内油气资源对经济社会可持续发展的保障能力已迫在眉睫。近年勘探实践和资源评价表明 ,我国沉积盆地发育 ,油气资源总量多 ,勘探潜力较大 ,但勘探难度加大。为此提出了“深化东部 ,加强西部 ,加快海上 ,开拓新区”

关键词：中国油气资源油气勘探资源潜力勘探战略

水平井筒气液两相变质量流动流型转变实验研究

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石油学报 2004年第3期25卷 83-85页

作者：薄启亮吴宁石油大学北京102249 中国石化勘探开发研究院北京100083

在对水平井筒气、液两相变质量流动的流型转变进行了理论研究 ,在此基础上 ,设计并建立了流型转变实验装置 ,对水平井筒气、液两相变质量流动的流型转变进行了模拟实验研究。在轴向为气、液两相流动的前提下分别进行了上管壁单孔眼注入... 详细信息

在对水平井筒气、液两相变质量流动的流型转变进行了理论研究 ,在此基础上 ,设计并建立了流型转变实验装置 ,对水平井筒气、液两相变质量流动的流型转变进行了模拟实验研究。在轴向为气、液两相流动的前提下分别进行了上管壁单孔眼注入和下管壁单孔眼注入的流型转变实验研究 ,获得了大量的实验数据。根据实验数据修正了理论计算模型。

关键词：水平井筒气液两相流动变质量流型模拟实验计算模型

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四维试井理论研究

石油学报 2003年第5期24卷 57-62页

作者：吴洪彪刘立明陈钦雷孙波北京大学北京100871 石油大学北京102249 大庆油田有限责任公司黑龙江大庆163453

把信息源的分布、信息的录取、信息的再现和信息的再生有机地结合起来 ,提出并建立了完整的“四维试井”理论体系。运用该理论体系研究了动态监测信息在空间分布上的科学性、合理性 ,以及试井参数在空间上的分布、延拓及随时间变化的规... 详细信息

把信息源的分布、信息的录取、信息的再现和信息的再生有机地结合起来 ,提出并建立了完整的“四维试井”理论体系。运用该理论体系研究了动态监测信息在空间分布上的科学性、合理性 ,以及试井参数在空间上的分布、延拓及随时间变化的规律。把优化理论应用到信息源的分布上 ,利用模拟退火算法给出了动态监测系统优化部署的方法 ,实现了科学布井、经济布井。以黑油模型为基础 ,建立了考虑层间窜流的多层、多相数值试井理论模型 ,实现了压力场和含油饱和度的“四维试井理论”分析。把神经网络技术和地质统计学理论应用到“四维试井”理论中 ,给出了动态监测信息空间分布。

关键词：四维试井压力监测系统优化数值试井时间推移试井空间延拓试井

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利用核磁共振测井评价储层的捕集能力

石油学报 2004年第4期25卷 38-41页

作者：肖立志刘堂宴傅容珊石油大学资源与信息学院北京102249 同济大学海洋和地球科学学院上海200092 中国科学技术大学地球和空间科学学院安徽合肥230026

在常规油藏评价中常常忽略对盖层和储层组合的评价。特定储盖层组合下的综合储集能力主要取决于盖层孔隙半径和储层孔隙半径之间的相对数值关系 ,这个数值关系可以用临界油柱高度表征。盖层一般为泥岩或其他类型的致密岩石 ,对其取心... 详细信息

在常规油藏评价中常常忽略对盖层和储层组合的评价。特定储盖层组合下的综合储集能力主要取决于盖层孔隙半径和储层孔隙半径之间的相对数值关系 ,这个数值关系可以用临界油柱高度表征。盖层一般为泥岩或其他类型的致密岩石 ,对其取心和岩心分析都很困难 ,导致盖层孔隙半径的计算精度不高或根本不能计算。根据核磁共振测井对岩石孔隙结构的敏感性 ,提出了利用核磁测井计算盖层和储层孔隙半径的方法 ,经过压汞资料的刻度后 ,核磁共振测井可以计算连续的孔隙半径。在渤海湾井区的实际应用表明 ,利用核磁共振测井计算的岩石孔隙半径对于确定储盖层的临界油柱高度、评价特定储盖层组合下的油气捕集能力。

关键词：储层盖层储集能力油柱高度孔隙结构油藏评价核磁共振测井

Structural features and petroleum geology of the fold-thrust belt in the southern Tarim basin, china

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Science china Earth Sciences 2004年第Z2期47卷 66-73页

作者： ZHOU Xinyuan1,2, LUO Jinhai2,3 & WANG Qinghua2 1. university of petroleum, beijing 102249, china 2. Tarim Oilfield Company, Petrochina, Korla 841000, china 3. Northwest university, Department of Geology, Xian 710069, china university of petroleum Beijing 102249 China Tarim Oilfield Company PetroChina Korla 841000 China Tarim Oilfield Company PetroChina Korla 841000 China Northwest university Department of Geology Xi'an 710069 China Tarim Oilfield Company PetroChina Korla 841000 China

The west Kunlun fold-thrust belt (WKFTB) and the Altun fold-thrust belt (AFTB) are respectively located in the southern margin of the Tarim basin, NW china. The analyses of typical structures and regional dynamics of the fold-thrust belts reveal their different structural and pe-troleum features and mechanisms. WKFTB differs from AFTB by abundant fault-related folds and triangles zones, and was formed by northward extrusion of the west Kunlun orogen. AFTB was affected synchronously by northward extrusion of the Altun orogen and the sinistral strike-slipping of the Altun Fault, so it is characterized by the minor scale and the monotonous structural styles. The Aqike anticline and the Aqike fault, of which the strikes are orthogonal to the strike of the fold-thrust belts, are regarded as the adjustive structures between both of the fold-thrust belts. The oil-gas pools of WKFTB develop mainly in the faulted-related anticline traps, but the oil-gas pools of AFTB develop mainly in the low fault-block and anticlines traps related with the pa-leo-uplifts. There are different exploration countermeasures for both of the fold-thrust belts.

关键词： Tarim, west Kunlun orogen, Altun orogen, fold-thrust belt, structural features, petroleum geology.