东濮凹陷北部沙三段古压力恢复及油气运聚动力构成
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摘要
综合应用流体包裹体法和盆地模拟法,恢复了东濮凹陷北部沙三段古压力,并分析了成藏期油气运聚动力构成。研究结果表明,沙三段超压分布受构造格局、沉降中心、生烃中心控制明显,超压幅度表现为洼陷区大、中央隆起带次之、西部斜坡带最小,受盐岩层发育影响,濮卫—文留地区盐岩下部层系表现为压力系数高值区。成藏期超压和浮力是研究区沙三段油气运聚的主要动力,压力过渡带和正常压力带是油气的主要聚集场所。研究区主要存在超压驱动、超压-浮力联合驱动和浮力驱动等3种类型的驱动机制,其中斜坡带和洼陷带等超压带主要为超压驱动,部分中央隆起带上的压力过渡带为超压-浮力联合驱动,西部斜坡带和部分中央隆起带等正常压力带主要为浮力驱动。
With the application of fluid inclusions and basin simulation method,we restored the paleo-formation pressure of the third member of Shahejie formation( Es3) in North Dongpu sag,and analyzed the dynamic mechanism for hydrocarbon migration and accumulation. The results showed as follows: The formation pressure of Es_3 during accumulation period was mainly controlled by the structural framework and the centers of subsidence and hydrocarbon generation,and the overpressure amplitude was largest in the sub-sag area with relatively larger in the central uplift belt and smallest in the west slope area. Controlled by the salt layer,the residual pressure of the lower formation was relatively high in Puwei and Wenliu. The overpressure and buoyancy were the main driving forces for the hydrocarbon accumulation of Es_3,and the normal pressure zone and transitional zone were the main hydrocarbon accumulation places. There are three types of dynamic mechanism for hydrocarbon migration and accumulation in the study area including overpressure drive,overpressure-buoyancy drive and buoyancy drive. Overpressure zone including the slope zone and the sub-sag zone is mainly overpressure driven. Overpressure transition zone including part of the central uplift belt is mainly overpressure-buoyancy driven. And normal pressure zone including the west slop and part of the central uplift belt is mainly buoyancy driven.
With the application of fluid inclusions and basin simulation method,we restored the paleo-formation pressure of the third member of Shahejie formation( Es3) in North Dongpu sag,and analyzed the dynamic mechanism for hydrocarbon migration and accumulation. The results showed as follows: The formation pressure of Es_3 during accumulation period was mainly controlled by the structural framework and the centers of subsidence and hydrocarbon generation,and the overpressure amplitude was largest in the sub-sag area with relatively larger in the central uplift belt and smallest in the west slope area. Controlled by the salt layer,the residual pressure of the lower formation was relatively high in Puwei and Wenliu. The overpressure and buoyancy were the main driving forces for the hydrocarbon accumulation of Es_3,and the normal pressure zone and transitional zone were the main hydrocarbon accumulation places. There are three types of dynamic mechanism for hydrocarbon migration and accumulation in the study area including overpressure drive,overpressure-buoyancy drive and buoyancy drive. Overpressure zone including the slope zone and the sub-sag zone is mainly overpressure driven. Overpressure transition zone including part of the central uplift belt is mainly overpressure-buoyancy driven. And normal pressure zone including the west slop and part of the central uplift belt is mainly buoyancy driven.
引文
[1]解习农,李思田,刘晓峰.异常压力盆地流体动力学[M].武汉:中国地质大学出版社,2006.XIE Xi-nong,LI Si-tian,LIU Xiao-feng.Basin fluid dynamics in abnormally pressured environments[M].Wuhan:China University of Geosciences Press,2006.
[2]杜栩,郑洪印,焦秀琼.异常压力与油气分布[J].地学前缘,1995,2(4):137~148.DU Xu,ZHENG Hong-yin,JIAO Xiu-qiong.Abnormal pressure and hydrocarbon accumulation[J].Earth Science Frontiers,1995,2(4):137~148.
[3]查明,曲江秀,张卫海.异常高压与油气成藏机理[J].石油勘探与开发,2002,29(1):19~23.ZHA Ming,QU Jiang-xiu,ZHANG Wei-hai.The relationship between overpressure and reservoir forming mechanism[J].Petroleum Exploration and Development,2002,29(1):19~23.
[4]Hunt J M.Generation and migration of petroleum from abnormally pressured fluid compartments[J].AAPG Bulletin,1990,74(1):1~12.
[5]郝芳.超压盆地生烃作用动力学与油气成藏机理[M].北京:科学出版社,2005.HAO fang.Kinetics of hydrocarbon generation and mechanisms of petroleum accumulation in overpressure Basins[M].Beijing:Science Press,2005.
[6]陈中红,查明.断陷湖盆超压分布特征及其与油气成藏的关系[J].石油学报,2008,29(4):509~515.CHEN Zhong-hong,ZHA Ming.Distribution characteristics of overpressure and its controlling to hydrocarbon accumulation in terrigenous faulted basin[J].Acta Petrolei Sinica,2008,29(4):509~515.
[7]刘华,蒋有录,宋国奇,等.渤海湾盆地东营凹陷沙四下亚段地层压力演化与天然气成藏沉积学报[J].2012,30(1):197~203.LIU Hua,JIANG You-lu,SONG Guo-qi,et al.Pressure evolution and gas accumulation of the Fourth Member of the Shahejie Formation in Dongying Depression,Bohai Bay Basin[J].Acta Sedimentologica Sinica,2012,30(1):197~203.
[8]刘士林,郑和荣,林舸,等.渤海湾盆地东营凹陷异常压力分布和演化特征及与油气成藏关系[J].石油实验地质,2010,32(3):233~237.LIU Shi-lin,ZHENG He-rong,LIN Ge,et al.Distribution and evolution characteristics of abnormal pressure and its relationship with hydrocarbon accumulation in the Dongying sag of Bohai Bay Basin[J].Petroleum Geology&Experiment,2010,32(3):233~237.
[9]Fillippone W R.Estimation of formation parameters and the prediction of overpressures from seismic data[J].Geophysics,1983,48(4):482~483.
[10]邹海峰.大港探区前第三系古流体和古温压特征及演化[D].长春:吉林大学地球科学学院,2000.ZOU Hai-feng.The characteristics and evolution of paleo-fliud and paleo-temperature-pressure of Pre-Tertiary in Dagang exploration area[D].Changchun:College of Earth Sciences,Jilin University,2000.
[11]刘福宁.异常高压区的古沉积厚度和古地层压力恢复方法探讨[J].石油与天然气地质,1994,15(2):180~185.LIU Fu-ning.An approach to reconstruction of paleo-sedimentary thickness and paleo-formation pressure in abnormal high pressure region[J].Oil&Gas Geology,1994,15(2):180~185.
[12]米敬奎,肖贤明,刘德汉,等.利用储层流体包裹体的PVT特征模拟计算天然气藏形成古压力——以鄂尔多斯盆地上古生界深盆气藏为例[J].中国科学:D辑,2003,33(7):679~685.MI Jing-kui,XIAO Xian-ming,LIU De-han,et al.Using PVT features of reservoir fluid inclusion to model and calculate formation palaeopressure of gas pool:Case study from deep basin gas pool of the Upper Palaozoic,Ordos Basin[J].Science in China:Series D,33(7):679~685.
[13]李善鹏,邱楠生.利用盆地模拟方法分析昌潍坳陷古压力[J].新疆石油学院学报,2003,15(4):5~8.LI Shan-peng,QIU Nan-sheng.Analyzing the paleopressure of Changwei depression by the use of basin modeling method[J].Journal of Xinjiang Petroleum Institute,2003,15(4):5~8.
[14]陈中红,查明.盆地流体与油气成藏[M].北京:科学出版社,2013.CHEN Zhong-hong,ZHA Ming.Basin fluid and hydrocarbon accumulation[M].Beijing:Science Press,2013.
[15]刘景东,蒋有录.东濮凹陷中央隆起带北部古近系异常高压与油气成藏的关系[J].天然气工业,2012,32(12):30~36,126.LIU Jing-dong,JIANG You-lu.Relationship between abnormally high pressure and hydrocarbon accumulation of the Paleogene reservoirs in the northern part of central uplift,Dongpu sag,Bohai Bay Basin[J].Natural Gas Industry,2012,32(12):30~36,126.
[16]孙波,蒋有录,石小虎,等.渤海湾盆地东濮凹陷压力演化与超压形成机制[J].中国石油大学学报:自然科学版,2013,37(2):28~35.SUN Bo,JIANG You-lu,SHI Xiao-hu,et al.Pressure evolution and formation mechanism of overpressure in Dongpu depression,Bohaiwan Basin[J].Journal of China University of Petroleum:Edition of Natural Science,2013,37(2):28~35.
[17]刘景东,蒋有录.东濮凹陷北部地区古近系烃源岩热演化特征[J].中国地质,2013,40(2):498~507.LIU Jing-dong,JIANG You-lu.Thermal evolution characteristics of Paleogene source rocks and their maincontrolling factors in northern part of Dongpu depression[J].Geology in China,2013,40(2):498~507.
[18]ZHANG Yi-gang,FRANTZ J D.Determination of the homogenization temperatures and densities of supercritical fluids in the system Na Cl-KCl-Ca Cl2-H2O using synthetic fluid inclusions[J].Chemical Geology,1987,64(3):335~350.
[2]杜栩,郑洪印,焦秀琼.异常压力与油气分布[J].地学前缘,1995,2(4):137~148.DU Xu,ZHENG Hong-yin,JIAO Xiu-qiong.Abnormal pressure and hydrocarbon accumulation[J].Earth Science Frontiers,1995,2(4):137~148.
[3]查明,曲江秀,张卫海.异常高压与油气成藏机理[J].石油勘探与开发,2002,29(1):19~23.ZHA Ming,QU Jiang-xiu,ZHANG Wei-hai.The relationship between overpressure and reservoir forming mechanism[J].Petroleum Exploration and Development,2002,29(1):19~23.
[4]Hunt J M.Generation and migration of petroleum from abnormally pressured fluid compartments[J].AAPG Bulletin,1990,74(1):1~12.
[5]郝芳.超压盆地生烃作用动力学与油气成藏机理[M].北京:科学出版社,2005.HAO fang.Kinetics of hydrocarbon generation and mechanisms of petroleum accumulation in overpressure Basins[M].Beijing:Science Press,2005.
[6]陈中红,查明.断陷湖盆超压分布特征及其与油气成藏的关系[J].石油学报,2008,29(4):509~515.CHEN Zhong-hong,ZHA Ming.Distribution characteristics of overpressure and its controlling to hydrocarbon accumulation in terrigenous faulted basin[J].Acta Petrolei Sinica,2008,29(4):509~515.
[7]刘华,蒋有录,宋国奇,等.渤海湾盆地东营凹陷沙四下亚段地层压力演化与天然气成藏沉积学报[J].2012,30(1):197~203.LIU Hua,JIANG You-lu,SONG Guo-qi,et al.Pressure evolution and gas accumulation of the Fourth Member of the Shahejie Formation in Dongying Depression,Bohai Bay Basin[J].Acta Sedimentologica Sinica,2012,30(1):197~203.
[8]刘士林,郑和荣,林舸,等.渤海湾盆地东营凹陷异常压力分布和演化特征及与油气成藏关系[J].石油实验地质,2010,32(3):233~237.LIU Shi-lin,ZHENG He-rong,LIN Ge,et al.Distribution and evolution characteristics of abnormal pressure and its relationship with hydrocarbon accumulation in the Dongying sag of Bohai Bay Basin[J].Petroleum Geology&Experiment,2010,32(3):233~237.
[9]Fillippone W R.Estimation of formation parameters and the prediction of overpressures from seismic data[J].Geophysics,1983,48(4):482~483.
[10]邹海峰.大港探区前第三系古流体和古温压特征及演化[D].长春:吉林大学地球科学学院,2000.ZOU Hai-feng.The characteristics and evolution of paleo-fliud and paleo-temperature-pressure of Pre-Tertiary in Dagang exploration area[D].Changchun:College of Earth Sciences,Jilin University,2000.
[11]刘福宁.异常高压区的古沉积厚度和古地层压力恢复方法探讨[J].石油与天然气地质,1994,15(2):180~185.LIU Fu-ning.An approach to reconstruction of paleo-sedimentary thickness and paleo-formation pressure in abnormal high pressure region[J].Oil&Gas Geology,1994,15(2):180~185.
[12]米敬奎,肖贤明,刘德汉,等.利用储层流体包裹体的PVT特征模拟计算天然气藏形成古压力——以鄂尔多斯盆地上古生界深盆气藏为例[J].中国科学:D辑,2003,33(7):679~685.MI Jing-kui,XIAO Xian-ming,LIU De-han,et al.Using PVT features of reservoir fluid inclusion to model and calculate formation palaeopressure of gas pool:Case study from deep basin gas pool of the Upper Palaozoic,Ordos Basin[J].Science in China:Series D,33(7):679~685.
[13]李善鹏,邱楠生.利用盆地模拟方法分析昌潍坳陷古压力[J].新疆石油学院学报,2003,15(4):5~8.LI Shan-peng,QIU Nan-sheng.Analyzing the paleopressure of Changwei depression by the use of basin modeling method[J].Journal of Xinjiang Petroleum Institute,2003,15(4):5~8.
[14]陈中红,查明.盆地流体与油气成藏[M].北京:科学出版社,2013.CHEN Zhong-hong,ZHA Ming.Basin fluid and hydrocarbon accumulation[M].Beijing:Science Press,2013.
[15]刘景东,蒋有录.东濮凹陷中央隆起带北部古近系异常高压与油气成藏的关系[J].天然气工业,2012,32(12):30~36,126.LIU Jing-dong,JIANG You-lu.Relationship between abnormally high pressure and hydrocarbon accumulation of the Paleogene reservoirs in the northern part of central uplift,Dongpu sag,Bohai Bay Basin[J].Natural Gas Industry,2012,32(12):30~36,126.
[16]孙波,蒋有录,石小虎,等.渤海湾盆地东濮凹陷压力演化与超压形成机制[J].中国石油大学学报:自然科学版,2013,37(2):28~35.SUN Bo,JIANG You-lu,SHI Xiao-hu,et al.Pressure evolution and formation mechanism of overpressure in Dongpu depression,Bohaiwan Basin[J].Journal of China University of Petroleum:Edition of Natural Science,2013,37(2):28~35.
[17]刘景东,蒋有录.东濮凹陷北部地区古近系烃源岩热演化特征[J].中国地质,2013,40(2):498~507.LIU Jing-dong,JIANG You-lu.Thermal evolution characteristics of Paleogene source rocks and their maincontrolling factors in northern part of Dongpu depression[J].Geology in China,2013,40(2):498~507.
[18]ZHANG Yi-gang,FRANTZ J D.Determination of the homogenization temperatures and densities of supercritical fluids in the system Na Cl-KCl-Ca Cl2-H2O using synthetic fluid inclusions[J].Chemical Geology,1987,64(3):335~350.