东营凹陷永8断块断层调节带及其对油气分布的控制作用
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摘要
利用高精度的三维地震资料,结合油田地质资料对永8块断层几何学、运动学和动力学进行了研究。结果表明,该断块为一典型东西向展布的同向叠覆型断层调节带,西侧主断层(辛120断层)与调节断层在剖面上呈阶梯状组合样式,东侧主断层(永105断层)与调节断层呈地垒状组合;辛120断层活动性减弱时,其位移量传递给永105断层和调节断层;力学分析认为该断层调节带是在左旋张扭构造应力场作用下形成的。通过对永8块油气分布、油气来源以及断裂活动性与封闭性研究,建立了永8断层调节带油气成藏模式:主成藏期东侧主断层作为油源断层沟通了烃源灶和储集层并输导油气;调节断层停止活动时间早形成断块圈闭,成为遮挡断层。永8块西侧是有利滚动勘探开发区。
Based on the study of fault geometry,kinematics,and dynamics in Yong 8 fault block using 3-d high-resolution seismic data with oil field geological data,we discovered an east-west striking synthetic-overlapping fault accommodation zone.The western side of the major fault(Xin 120 Fault) with adjusting faults shows a step-style structural pattern,and the eastern side of the major fault(Yong 105 Fault) with adjusting faults shows a horst-style structural pattern.When Xin 120 fault activity becomes weak,Yong 105 Fault and adjusting faults accommodate the displacement.Stress field of Yong 8 accommodation zone is left-lateral,transextensional.Through the analysis of distribution and source of Yong 8 fault block,characteristics of fault activities,and fault sealing properties,we constructed the accumulation model of Yong 8 block fault.The eastern side of the major fault is oil source fault which connected the source and the reservoir,and migrated hydrocarbon during the main hydrocarbon accumulation period,and adjusting faults stopped activities in the earlier period,formed fault traps,and became barrier faults.Western part of Yong 8 fault block is the target region for progressive exploration and development.
Based on the study of fault geometry,kinematics,and dynamics in Yong 8 fault block using 3-d high-resolution seismic data with oil field geological data,we discovered an east-west striking synthetic-overlapping fault accommodation zone.The western side of the major fault(Xin 120 Fault) with adjusting faults shows a step-style structural pattern,and the eastern side of the major fault(Yong 105 Fault) with adjusting faults shows a horst-style structural pattern.When Xin 120 fault activity becomes weak,Yong 105 Fault and adjusting faults accommodate the displacement.Stress field of Yong 8 accommodation zone is left-lateral,transextensional.Through the analysis of distribution and source of Yong 8 fault block,characteristics of fault activities,and fault sealing properties,we constructed the accumulation model of Yong 8 block fault.The eastern side of the major fault is oil source fault which connected the source and the reservoir,and migrated hydrocarbon during the main hydrocarbon accumulation period,and adjusting faults stopped activities in the earlier period,formed fault traps,and became barrier faults.Western part of Yong 8 fault block is the target region for progressive exploration and development.
引文
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Morley C K,Nelson R A and Patton T L.1990.Transfer zones in the EastAfrican Rift system and their relevance to hydrocarbon explorationin rifts[J].AAPG,74(8):1234-1253.
Peacock D C P,Knipe R J and Sanderson D J.2000.Glossary of normalfaults[J].Jurnal of Structural Geology,22(3):291-305.
陈书平,漆家福,王德仁,等.2007.东濮凹陷断裂系统及变换构造[J].石油学报,28(1):44-49.
金强,王端平,何瑞武,等.2009.小型断块油藏识别和描述[J].石油学报,30(3):367-371.
刘华,蒋有录,龚永杰,等.2008.东营凹陷新立村油田稠油成因[J].新疆石油地质,29(2):179-181.
马丽娟,郑和荣.2006.渤海湾盆地东营凹陷中央隆起带构造特征[J].石油实验地质,28(2):103-108.
孙思敏,黄述旺,彭仕宓,等.2005.东辛油田营13断块区调节带特征及成因探讨[J].中国海上油气,17(4):225-227.
王端平,柳强.2000.复杂断块油田精细油藏描述[J].石油学报,21(6):111-116.
王家豪,王华,任建业,等.2010.黄骅坳陷中区大型斜向变换带及其油气勘探意义[J].石油学报,31(3):354-360.
杨明慧.2009.渤海湾盆地变换构造特征及其成藏意义[J].石油学报,30(6):816-823.
赵贤正,金强,张亮,等.2010.渤海湾盆地冀中坳陷北部石炭—二叠系煤成油气成藏条件及勘探前景[J].石油实验地质,32(5):459-464.
周心怀,余一欣,魏刚,等.2008.渤海辽东湾海域JZ25-1S转换带与油气成藏的关系[J].石油学报,29(6):837-840.
朱光有,金强,戴金星.2004.东营凹陷油气成藏期次及其分布规律研究[J].石油与天然气地质,25(2):209-215.
邹华耀,周心怀,鲍晓欢,等.2010.渤海海域古近系、新近系原油富集/贫化控制因素与成藏模式[J].石油学报,31(6):887-893.
Dahlstrom C D A.1970.Structural geology in the eastern margin of theCanadian Rocky Mountains[J].Bull of Canadian Petroleum Geology,187(3):332-406.
Elena K A,Harris L B,Poulin J,et al.2007.Transfer zones and faultreactivation in inverted rift basins:Insights from physical modelling[J].Tectonophysics,441:1-26.
Faulds J E and Varga R J.1998.The role of accommodation zones andtransfer zones in the regional segmentation of extended terranes[G]//Faulds J E,Stewart J H.Accommodation zones and transferzones:The regional segmentation of the basin and range provinces.Boulder Colorado:the Geology Society of America:323:1-45.
Frankowicz E and McClay K R.2010.Extensional fault segmentation andlinkages,Bonaparte Basin,outer North West Shelf,Australia[J].AAPG,94(7):977-1010.
Su J B,Zhu W B,Wei J,et al.2011.Fault growth and linkage:Implications for tectonosedimentary evolution in the Chezhen Basinof Bohai Bay,eastern China[J].AAPG,95(1):1-26.
Morley C K,Nelson R A and Patton T L.1990.Transfer zones in the EastAfrican Rift system and their relevance to hydrocarbon explorationin rifts[J].AAPG,74(8):1234-1253.
Peacock D C P,Knipe R J and Sanderson D J.2000.Glossary of normalfaults[J].Jurnal of Structural Geology,22(3):291-305.
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