断层封堵能力定量评价
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摘要
断层封堵性分析是断层构造圈闭评价的重要内容,断层封堵能力的优劣将直接决定其成藏的可能性。依据对接封堵机理,将砂岩视为渗透性地层,泥岩视为非渗透性地层,通过地震及区域地质资料,确定目的盘和封堵盘整体高度、各层厚度及砂地比等参数。通过随机模拟建立断层两侧岩性柱子,对砂岩储集层进行逐层判断,统计每层被封堵的百分比,将出现概率最大的封堵百分比值视为该目的层的封堵百分比。从定量计算结果可总结出断层两侧砂岩含量、地层层数等参数对封堵能力的影响规律:目的盘含砂量越低、层数越多,砂岩被封堵的百分比越高;封堵盘含砂量越低、层数越少,目的盘砂岩被封堵的百分比越高。将该方法应用于珠江口盆地深水区构造圈闭断层封堵性研究,认为目的盘砂岩的封堵百分比为4 0%~5 0%,属于中等封堵。图9表3参1 8
Fault sealing analysis is an important aspect of the fault trap evaluation.Probability statistics is used to quantitatively evaluate fault sealing.According to the fault sealing mechanism,sands are permeable strata and clay stones are impermeable strata.The paper determines the sedimentary facies and sand content of target stratum and plugged zone using seismic data and regional geological data,and then establishes the lithologic columns on both sides of the fault using random simulation,counts the sealing percentage of every sand layer,and confirms the sealing percentage of the whole reservoir rocks by probability statistics calculation.The results show: the lower content of sand and the more strata reservoir rocks contain,the higher the percentage of the fault sealing sandstones;the lower content of sand and the less strata sealing rocks contain,the higher the percentage of the fault sealing reservoir rocks.The method is applied in the deepwater area of the Pearl River Mouth Basin without wells and indicates that its sealing percentage is 40%-50%.
Fault sealing analysis is an important aspect of the fault trap evaluation.Probability statistics is used to quantitatively evaluate fault sealing.According to the fault sealing mechanism,sands are permeable strata and clay stones are impermeable strata.The paper determines the sedimentary facies and sand content of target stratum and plugged zone using seismic data and regional geological data,and then establishes the lithologic columns on both sides of the fault using random simulation,counts the sealing percentage of every sand layer,and confirms the sealing percentage of the whole reservoir rocks by probability statistics calculation.The results show: the lower content of sand and the more strata reservoir rocks contain,the higher the percentage of the fault sealing sandstones;the lower content of sand and the less strata sealing rocks contain,the higher the percentage of the fault sealing reservoir rocks.The method is applied in the deepwater area of the Pearl River Mouth Basin without wells and indicates that its sealing percentage is 40%-50%.
引文
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[3]Sorkhabi R,Suzuki U,Sato D.Structural evaluation of petro-leum sealing capacity of faults[J].SPE 59405,2000.1-9.
[4]Knipe R J.Faulting processes and fault seal[A].Larsen R M,Brekke H,Larsen B T.Structural and tectonic modeling and itsapplication to petroleum geology[C].Stavanger:NorwegionPetroleum Society,1992.325-342.
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[6]Smith D A.Theoretical consideration of sealing and nonsealingfaults[J].AAPG Bulletin,1996,15(1):14-27.
[7]曹瑞成,陈章明.早期勘探区断层封闭性评价方法[J].石油学报,1992,13(1):13-22.
[8]吕延防,陈章明.非线性映射分析判断断层封闭性[J].石油学报,1995,16(2):36-41.
[9]付广,薛永超,杨勉.利用地震资料判断断层封闭性的方法探讨[J].石油物探,2000,39(1):70-76.
[10]Allen U S.Model for hydrocarbon migration and entrapmentwithin fault[J].AAPG Bulletin,1989,73:803-811.
[11]张永华,贾曙光,杨春峰,等.断层封堵性的应用研究[J].石油物探,2001,40(4):83-87.
[12]邓俊国,王贤,王伟锋.模糊综合评判技术在柳堡断块圈闭评价中的应用[J].断块油气田,1999,6(6):5-9.
[13]童亨茂,曹代勇.中国沉积盆地复杂性的成因剖析及其油气赋存特征[J].石油与天然气地质,2004,26(5):415-420.
[14]周新桂,孙宝珊,谭成轩,等.现今地应力与断层封闭效应[J].石油勘探与开发,2000,27(5):127-131.
[15]吕延防,付广,张运峰,等.断层封闭性研究[M].北京:石油工业出版社,2002.100-108.
[16]邹华耀,金燕,黄光辉.断层封闭与油气运移和聚集[J].江汉石油学院学报,1999,21(1):9-14.
[17]Hooper E C D.Fluid migration along growth faults in compactionsediments[J].Journal of Petroleum Geology,1991,14(2):161-180.
[18]孙家振,李兰斌.地震地质综合解释教程[M].武汉:中国地质大学出版社,2002.121-127.
[2]Watts K J.Theoretical aspects of cap-rock and fault seals forsingle and two-phase hydrocarbon columns[J].Marine andPetroleum Geology,1987,31(4):274-307.
[3]Sorkhabi R,Suzuki U,Sato D.Structural evaluation of petro-leum sealing capacity of faults[J].SPE 59405,2000.1-9.
[4]Knipe R J.Faulting processes and fault seal[A].Larsen R M,Brekke H,Larsen B T.Structural and tectonic modeling and itsapplication to petroleum geology[C].Stavanger:NorwegionPetroleum Society,1992.325-342.
[5]鲁兵,丁文龙,刘忠,等.断层封闭性研究进展[J].地质科技情报,1998,7(3):75-80.
[6]Smith D A.Theoretical consideration of sealing and nonsealingfaults[J].AAPG Bulletin,1996,15(1):14-27.
[7]曹瑞成,陈章明.早期勘探区断层封闭性评价方法[J].石油学报,1992,13(1):13-22.
[8]吕延防,陈章明.非线性映射分析判断断层封闭性[J].石油学报,1995,16(2):36-41.
[9]付广,薛永超,杨勉.利用地震资料判断断层封闭性的方法探讨[J].石油物探,2000,39(1):70-76.
[10]Allen U S.Model for hydrocarbon migration and entrapmentwithin fault[J].AAPG Bulletin,1989,73:803-811.
[11]张永华,贾曙光,杨春峰,等.断层封堵性的应用研究[J].石油物探,2001,40(4):83-87.
[12]邓俊国,王贤,王伟锋.模糊综合评判技术在柳堡断块圈闭评价中的应用[J].断块油气田,1999,6(6):5-9.
[13]童亨茂,曹代勇.中国沉积盆地复杂性的成因剖析及其油气赋存特征[J].石油与天然气地质,2004,26(5):415-420.
[14]周新桂,孙宝珊,谭成轩,等.现今地应力与断层封闭效应[J].石油勘探与开发,2000,27(5):127-131.
[15]吕延防,付广,张运峰,等.断层封闭性研究[M].北京:石油工业出版社,2002.100-108.
[16]邹华耀,金燕,黄光辉.断层封闭与油气运移和聚集[J].江汉石油学院学报,1999,21(1):9-14.
[17]Hooper E C D.Fluid migration along growth faults in compactionsediments[J].Journal of Petroleum Geology,1991,14(2):161-180.
[18]孙家振,李兰斌.地震地质综合解释教程[M].武汉:中国地质大学出版社,2002.121-127.
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