基于地化-测井-地震联合反演的优质烃源岩研究方法及其应用——以涠西南凹陷为例
|
摘要
优质烃源岩(TOC>2.0%)的空间刻画是油气勘探研究关注的基础问题,而烃源层中沉积有机质的非均质性分布以及烃源岩有机碳三维空间刻画一直是烃源岩研究的难题。综合运用地球化学、测井及地球物理信息,参考沉积相和岩性组合特征,首次建立了基于地化-测井-地震联合反演的优质烃源岩研究方法,并应用于北部湾盆地涠西南凹陷流沙港组,结果表明流沙港组二段发育的3个次一级的优质烃源层段是涠西南凹陷油气资源的重要贡献者。该方法的反演结果与实测资料相关性较好,精度较高,对烃源岩有机碳三维空间"体"的连续性刻画可以有效解决少井或无井海域烃源岩评价的缺陷。将测井和地球物理反演技术从储层扩展至烃源岩的研究对于海上油气勘探是一个全新的尝试。
The space distribution of organic carbon in high-quality source rocks(TOC>2.0%)is a basic issue needed to be solved in petroleum exploration,but it has been difficult to identify the heterogenetic distribution of sedimentary organic carbon and to describe it in three dimension.By comprehensively using geochemistry,logging and seismic data and considering sedimentary facies and lithological associations,a method to evaluate high-quality source rocks based on geochemistry-logging-seismic joint-inversion was firstly established and has been applied to the source rock of Liushagang Formation in Weixinan sag,Beibuwan basin,showing that the three subzones of high-quality source rock in Member 2of Liushagang Formation are the major contributors to the hydrocarbon resources in Weixinan sag.The results from this method may have agood correlation with the measured data and be in higher accuracy,and the obtained continuous description of 3D TOC"volumes"in source rocks can efficiently fill the gap of source rock evaluation in some offshore areas with no or scarce wells.Expanding the application of logging and geophysical inversion from reservoir description to source rock analysis is a new attempt in offshore hydrocarbon exploration.
The space distribution of organic carbon in high-quality source rocks(TOC>2.0%)is a basic issue needed to be solved in petroleum exploration,but it has been difficult to identify the heterogenetic distribution of sedimentary organic carbon and to describe it in three dimension.By comprehensively using geochemistry,logging and seismic data and considering sedimentary facies and lithological associations,a method to evaluate high-quality source rocks based on geochemistry-logging-seismic joint-inversion was firstly established and has been applied to the source rock of Liushagang Formation in Weixinan sag,Beibuwan basin,showing that the three subzones of high-quality source rock in Member 2of Liushagang Formation are the major contributors to the hydrocarbon resources in Weixinan sag.The results from this method may have agood correlation with the measured data and be in higher accuracy,and the obtained continuous description of 3D TOC"volumes"in source rocks can efficiently fill the gap of source rock evaluation in some offshore areas with no or scarce wells.Expanding the application of logging and geophysical inversion from reservoir description to source rock analysis is a new attempt in offshore hydrocarbon exploration.
引文
[1]袁东山,王国斌,汤泽宁,等.测井资料评价烃源岩方法及其进展[J].石油天然气学报,2009,31(4):194.
[2]王贵文,朱振宇,朱广宇.烃源岩测井识别与评价方法研究[J].石油勘探与开发,2002,29(4):50-52.
[3]王方雄,侯英姿,夏季.烃源岩测井评价新进展[J].测井技术,2002,26(2):89-93.
[4]FERTL W H,RIEKE H H.Gamma ray spectral evaluation tech-niques identify fractured shale reservoirs and source rock charac-teristics[J].Journal of Petroleum Technology,1980,31(11):2053-2062.
[5]PASSEY Q R.A practical model for organic richness from po-rosity and resistivity logs[J].The American Association ofPetroleum Geologists Bulletin,1990,74(12):1777-1794.
[6]MEYER B L,NEDERLOF M H.Identification of source rocks onwireline logs by density/resistivity and sonic tran-sit time/resis-tivity crossplots[J].AAPG Bulletin,1984,68(2):121-129.
[7]FERTL W H,CHILINGAR G V.Total organic carbon con-tent determined from well logs[C].SPE,1988:407-419.
[8]徐建永,张功成,梁建设,等.北部湾盆地古近纪幕式断陷活动规律及其与油气的关系[J].中国海上油气,2011,23(6):362-368.
[9]龚再升,李思田,谢泰俊,等.南海北部大陆边缘盆地分析与油气聚集[M].北京:科学出版社,1997:328-337.
[10]朱伟林,米立军,高乐,等.2007年中国近海油气勘探回顾[J].中国海上油气,2008:20(1):1-8.
[11]董贵能.涠西南凹陷流一段扇三角洲沉积特征及其对隐蔽油气藏形成的控制作用[J].中国海上油气,2008,20(5):298-301.
[12]朱伟林,米立军,钟锴,等.油气并举再攀高峰——中国近海2010年勘探回顾及“十二五”勘探展望[J].中国海上油气,2011,23(1):1-6.
[13]张宽,胡根成,吴克强,等.中国近海主要含油气盆地新一轮油气资源评价[J].中国海上油气,2007,19(5):289-294.
[14]刘震,常迈,赵阳,等.低勘探程度盆地烃源岩早期预测方法研究[J].地学前缘,2007,14(4):159-167.
[15]顾礼敬,徐守余,苏劲,等.利用地震资料预测和评价烃源岩[J].天然气地球化学,2011,22(3):554-560.
[16]张寒,朱光有.利用地震和测井信息预测和评价烃源岩——以渤海湾盆地富油凹陷为例[J].石油勘探与开发,2007,34(1):55-59.
[2]王贵文,朱振宇,朱广宇.烃源岩测井识别与评价方法研究[J].石油勘探与开发,2002,29(4):50-52.
[3]王方雄,侯英姿,夏季.烃源岩测井评价新进展[J].测井技术,2002,26(2):89-93.
[4]FERTL W H,RIEKE H H.Gamma ray spectral evaluation tech-niques identify fractured shale reservoirs and source rock charac-teristics[J].Journal of Petroleum Technology,1980,31(11):2053-2062.
[5]PASSEY Q R.A practical model for organic richness from po-rosity and resistivity logs[J].The American Association ofPetroleum Geologists Bulletin,1990,74(12):1777-1794.
[6]MEYER B L,NEDERLOF M H.Identification of source rocks onwireline logs by density/resistivity and sonic tran-sit time/resis-tivity crossplots[J].AAPG Bulletin,1984,68(2):121-129.
[7]FERTL W H,CHILINGAR G V.Total organic carbon con-tent determined from well logs[C].SPE,1988:407-419.
[8]徐建永,张功成,梁建设,等.北部湾盆地古近纪幕式断陷活动规律及其与油气的关系[J].中国海上油气,2011,23(6):362-368.
[9]龚再升,李思田,谢泰俊,等.南海北部大陆边缘盆地分析与油气聚集[M].北京:科学出版社,1997:328-337.
[10]朱伟林,米立军,高乐,等.2007年中国近海油气勘探回顾[J].中国海上油气,2008:20(1):1-8.
[11]董贵能.涠西南凹陷流一段扇三角洲沉积特征及其对隐蔽油气藏形成的控制作用[J].中国海上油气,2008,20(5):298-301.
[12]朱伟林,米立军,钟锴,等.油气并举再攀高峰——中国近海2010年勘探回顾及“十二五”勘探展望[J].中国海上油气,2011,23(1):1-6.
[13]张宽,胡根成,吴克强,等.中国近海主要含油气盆地新一轮油气资源评价[J].中国海上油气,2007,19(5):289-294.
[14]刘震,常迈,赵阳,等.低勘探程度盆地烃源岩早期预测方法研究[J].地学前缘,2007,14(4):159-167.
[15]顾礼敬,徐守余,苏劲,等.利用地震资料预测和评价烃源岩[J].天然气地球化学,2011,22(3):554-560.
[16]张寒,朱光有.利用地震和测井信息预测和评价烃源岩——以渤海湾盆地富油凹陷为例[J].石油勘探与开发,2007,34(1):55-59.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心