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Determination of paleo-pressure for a natural gas pool formation based on PVT characteristics of fluid inclusions in reservoir rocks——A case study of Upper-Paleozoic deep basin gas trap of the Ordos Basin

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Science china Earth sciences 2004年第6期47卷 507-513页

作者： mi jingkui1,2.xiao xianming1,{2.,& shen jiagui1 1.state key laboratory of organic geochemistry,guangzhou Institute of geochemistry,chinese academy of sciences,guangzhou 510640,china 2.Institute of Sedimentary mineral and Resources,Department of Civil Engineering,Xiangtan Polytechnic University,Xiangtan 4112.1,china state key {2. of organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangz China Institute of Sedimentary mineral and Resources Department of Civil Engineering Xiangtan Polytechnic University Xiangtan China

It has been proved to be a difficult problem to determine directly trapping pressure of fluid inclusions. Recently, PVT simulation softwares have been applied to simulating the trapping pressure of petroleum inclusions in reservoir rocks, but the reported methods have many limita- tions in practice. In this paper, a method is suggested to calculating the trapping pressure and temperature of fluid inclusions by combining the isochore equations of a gas-bearing aqueous inclusion with its coeval petroleum inclusions. A case study was conducted by this method for fluid inclusions occurring in the Upper-Paleozoic Shanxi Formation reservoir sandstones from the Ordos Basin. The results show that the trapping pressure of these inclusions ranges from 2. to 32.MPa, which is 6─7 MPa higher than their minimum trapping pressure although the trapping temperature is only 2.3℃ higher than the homogenization temperature. The trapping pressure and temperature of the fluid inclusions decrease from southern area to northern area of the basin. The trapping pressure is obviously lower than the state water pressures when the inclusions formed. These data are consistent with the regional geological and geochemical conditions of the basin when the deep basin gas trap formed.

关键词： Ordos Basin, fluid inclusion,PVTsim,trapping pressure.

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The generation kinetics of natural gases in the Kela-2.gas field from the Kuqa Depression, Tarim Basin, northwestern china

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chinese Journal Of geochemistry 2013年第2期32卷 157-169页

作者： LI Xianqing FENG Songbao xiao xianming TANG Yongchun xiao Zhongyao mi jingkui TIAN Hui liu dehan shen jiagui state key {2. of Coal Resources and Safe mining China University of Mining and Technology state key {2. of organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Environmental and Energy Research Center California Institute of Technology 738 Arrow Grand Circle Covina California 91722 USA Power Research Institute of Exploration and Development Tarim Oilfield CompanyPetroChina Research Institute of Petroleum Exploration and Development PetroChina

The Kela-2.gas field, found in the Kuqa Depression of the Tarim Basin, northwestern china, is a large-sized dry gas field (C1 /C1-5 =0.992.0.999) and characterized by ultra-high pressure (pressure factor up to 2.0 2.2.. The pyrolysis experiment was carried out under isothermal gold-tube closed system, with samples collected from the Jurassic coal, Jurassic mudstone and Triassic mudstone in the Kuqa Depression. The result of gas yield showed that the middle and Lower Jurassic source rocks have higher gas generation potential than the Triassic source rocks. The kinetic modeling of gas generation and methane carbon isotope fractionation suggested that the Kela-2.gases belong to the products of high-over mature stages and were mainly derived from the middle and Lower Jurassic coal-bearing strata. The Triassic source rocks made a minor contribution to the Kela-2.gases. The Kela-2.gases chiefly generated from coal-bearing source rocks with R o values from 1.3% to 2.5%, and thus primarily accumulated after 5 Ma.

关键词：克拉2.田塔里木盆地中国西北部天然气产量动力学建模库车坳陷煤系烃源岩含煤地层

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The generation and accumulation of natural gas from Yinan 2.gas pool in Kuqa Depression

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chinese Science Bulletin 2004年第S1期49卷 107-114页

作者： LI Xianqing xiao xianming TANG Yongchun xiao Zhongyao Ml jingkui liu dehan shen jiagui liu Jinzhong The state key {2. of organic geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China key laboratory of Coal Resources Ministry of EducationChina University of Mining and TechnologyBeijing 100083China The Research Center of Petroleum Energy and Environment California Engineer and Technology College21910 Currier RdWalnutCA 61769USA Research Institute of Exploration and Development Tarim Oil Field Sub-CompanyPetroChinaKorla 841000China

By using the methods of hydrocarbon generation kinetics and carbon isotope kinetics, combined with geological background of natural gas pool formation, the generation and accumulation of natural gas from Yinan 2.gas pool was studied in Kuqa Depression of the Tarim Basin. Natural gas of Yinan 2.gas pool is mainly derived from middle and Lower Jurassic coal-bearing source rocks, and generally belongs to long time-accumulated gas. It is suggested that Yinan 2.gas is chiefly accumulated in the last 5 Ma, its Ro ranges from 1.2.% to 1.95%, and the loss rate of natural gas is about 2.%-30%. This work not only complements and reduces the deficiency of formation model of natural gas pools which traditionally depends on the matching relationships between source rock, reservoir, cap rock, and trap, but also is a useful reference in the study of other gas pools.

关键词： natural gas formation hydrocarbon generation kinetics carbon isotope source rock Yinan 2 gas pool Kuqa Depression.

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Kinetic Parameters of Methane Generated from Source Rocks in the Kuqa Depression of Tarim Basin and Their Application

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 154-163页

作者： LI Xianqing xiao xianming {2. jingkui TANG Yongchun xiao Zhongyao liu dehan shen jiagui YANG Yunfeng WANG Yan DONG Peng state key {2. of organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China state key {2. of Coal Resources and Safe mining China University of Mining and Technology Beijing 100083 China Research Center of Petroleum Energy and Environment California Institute of Technology 21910 Currier Rd Walnut CA 61769 USA Research Institute of Exploration and Development Tarim Oil Field Company PetroChina Korla Xinjiang 841000 China

In a thermal simulation experiment of gold tubes of closed-system, calculating with the KINETICS and GOR-ISOTOPE KINETICS software, kinetic parameters of gas generation and methane carbon isotopic fractionation from Triassic-Jurassic hydrocarbon source rocks in the Kuqa depression of Tarim Basin are obtained. The activation energies of methane generated from Jurassic coal, Jurassic mudstone and Triassic mudstone in the Kuqa Depression are 197-2.8 kJ/mol, 180-2.0 kJ/mol and 2.4-2.9 kJ/mol, respectively, and their frequency factors are 5.2.5×10^13 s^-1, 9.761×10^11 s^-1 and 2.2.0×10^14 s^-1. This reflects their differences of hydrocarbon generation behaviors. The kinetic parameters of methane carbon isotopic fractionation are also different in Jurassic coal, Jurassic mudstone and Triassic mudstone, whose average activation energies are 2.8 kJ/mol, 2.5 kJ/mol and 2.1 kJ/mol, respectively. Combined with the geological background, the origin of natural gas in the Yinan-2.gas pool is discussed, and an accumulation model of natural gas is thus established. The Yinan- 2.gas is primarily derived from Jurassic coal-bearing source rocks in the Yangxia Sag. Main gas accumulation time is 5-0 Ma and the corresponding Ro is in the range from 1.2. %-1.95 %. The loss rate of natural gas is 2. %-30 %.

关键词： hydrocarbon source rock methane generation carbon isotopic fractionation kinetics Kuqa Depression Tarim Basin

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塔里木盆地克拉2.气田天然气的成因探讨

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天然气工业 2004年第11期24卷 8-10页

作者：李贤庆肖贤明米敬奎刘德汉申家贵唐永春肖中尧中国科学院广州地球化学研究所有机地球化学国家重点实验室美国加州理工学院石油能源与环境研究中心中国石油塔里木油田分公司勘探开发研究院

文章研究了塔里木盆地库车坳陷侏罗系煤系烃源岩在封闭体系下热模拟生成甲烷的碳同位素特征及其动力学参数,探讨了克拉2.气田天然气的成因。碳同位素动力学研究表明,库车坳陷侏罗系煤系烃源岩热模拟生成甲烷的碳同位素值介于-37‰^-2.... 详细信息

文章研究了塔里木盆地库车坳陷侏罗系煤系烃源岩在封闭体系下热模拟生成甲烷的碳同位素特征及其动力学参数,探讨了克拉2.气田天然气的成因。碳同位素动力学研究表明,库车坳陷侏罗系煤系烃源岩热模拟生成甲烷的碳同位素值介于-37‰^-2.‰之间;可以用动力学方法将煤系烃源岩热模拟实验数据外推,应用于地质条件。克拉2.气田天然气主要来源于中下侏罗统煤系烃源岩,属阶段捕获气,主要聚集了-5^-1 Ma阶段的天然气,其成熟度R(?)为1.3％-2.5％。这不仅得到早期相关研究成果的支持,而且也符合该区天然气的勘探实际。

关键词：煤系烃源岩大气田成因探讨碳同位素塔里木盆地侏罗系下侏罗统天然气库车坳陷热模拟实验

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用显微镜和拉曼光谱研究四川盆地高科1井、五科1井、普光5井、普光3井高密度甲烷包裹体特征与天然气成因

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地球化学 2023年第6期52卷 673-684页

作者：刘德汉肖贤明田辉戴金星彭平安王云鹏米敬奎汪泽成李剑李腾飞程鹏中国科学院广州地球化学研究所有机地球化学国家重点实验室广东广州510640 中国地质大学(北京) 北京100083 中国石油勘探开发研究院北京100083

用光学显微镜和显微激光拉曼等技术手段综合研究了四川盆地4个钻孔中甲烷包裹体密度和热演化程度,以及甲烷包裹体、盐水包裹体与固体沥青的共生组合形式。结果表明,高密度甲烷包裹体主要形成于原油–沥青和干酪根高温–高压裂解的不混... 详细信息

用光学显微镜和显微激光拉曼等技术手段综合研究了四川盆地4个钻孔中甲烷包裹体密度和热演化程度,以及甲烷包裹体、盐水包裹体与固体沥青的共生组合形式。结果表明,高密度甲烷包裹体主要形成于原油–沥青和干酪根高温–高压裂解的不混溶体系。研究样品中甲烷包裹体的拉曼位移为2.09.76~2.11.69 cm-1,计算对应的密度为0.2.1~0.351 g/cm3,其变化范围不仅与包裹体形成的温度、压力有关,而且还受到矿物包裹体保存条件的影响。样品的甲烷包裹体拉曼镜质体反射率(RMVRo)为3.07%~3.85%,多数>3.15%,其大小取决于地层中局域平衡体系的温度、压力和有效受热时间。各种包裹体与固体沥青的共生产出形式,反映了不同钻孔油气成因演化的重要信息:高科1井石英团块中捕获的高密度甲烷包裹体与储层焦沥青–碳沥青的产出特征,反映本区震旦系–寒武系碳酸盐岩气藏主要为储层油裂解气成因;五科1井志留系黑色页岩中的高密度甲烷包裹体产出形式和气体组成特征,反映志留系页岩气主要为残留烃和干酪根高温裂解成因,一般不含H2.并具有超压现象,据志留系黑色页岩石英脉中个别轻烃包裹体特征,推测部分奥陶系碳酸盐岩储层可能保存少量轻烃;普光5井富含H2.的高密度甲烷包裹体和焦沥青特征,提供了飞仙关组和长兴组碳酸盐岩储层中的油裂解气藏明显受硫酸盐热化学反应(TSR)影响的证据;普光3井须家河组石英脉中捕获的高密度包裹体不含H2.,甲烷包裹体中焦沥青反射率高达3.40%,而须家河组地层中固体沥青反射率为2.48%,两者热演化程度明显不匹配,提供了本区可能有深部含烃热流体沿逆冲断裂带上侵的重要信息。

关键词：高密度甲烷包裹体焦沥青油裂解气页岩气

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