歧口凹陷歧深地区古近系多层超压体系特征
|
摘要
通过钻井实测储层压力、测井资料计算泥岩压力以及地震资料计算的地层压力的分析,查明了歧深地区超压体系空间展布。研究结果表明:纵向上,地层压力结构可划分为静水压力体系、上部超压体系和下部超压体系;平面上,在北大港东翼、歧口凹陷及部分板桥凹陷均显示超压,且在凹陷深部出现明显的2个超压体系;超压体系的出现不仅有效抑制了深层砂体的压实作用,而且对深部油气藏运移和聚集起到有效的控制作用。准确地识别歧深地区超压体系的展布对该区油气勘探具有重要的指导作用。
Spatial distribution of the overpressure system in the Qishen area of the Qikou depression is revealed through analysis of reservoir pressure measured during drilling,shale pressure calculated from log data and formation pressure calculated from seismic data.The research results indicate that the formation pressure system can be vertically divided into hydrostatic system,upper overpressure system and lower overpressure system;laterally,overpressure shows in east Beidagang flank,Qikou depression and part of Banqiao depression,and two obvious overpressure systems appear in the deep Qikou depression;the overpressure systems had restrained the compaction process of deeper sands,and controlled hydrocarbon migration and accumulation in deeper reservoirs.Accurate identification of spatial distribution of overpressure systems is helpful to hydrocarbon exploration in the Qishen area.
Spatial distribution of the overpressure system in the Qishen area of the Qikou depression is revealed through analysis of reservoir pressure measured during drilling,shale pressure calculated from log data and formation pressure calculated from seismic data.The research results indicate that the formation pressure system can be vertically divided into hydrostatic system,upper overpressure system and lower overpressure system;laterally,overpressure shows in east Beidagang flank,Qikou depression and part of Banqiao depression,and two obvious overpressure systems appear in the deep Qikou depression;the overpressure systems had restrained the compaction process of deeper sands,and controlled hydrocarbon migration and accumulation in deeper reservoirs.Accurate identification of spatial distribution of overpressure systems is helpful to hydrocarbon exploration in the Qishen area.
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,2006:14-41.
[2]闫桂京,陈建文,等.超压与油气的关系[J].海洋地质动态,2005,21(9):1-2.
[3]柳广第,王德强.黄骅坳陷歧口凹陷深层异常压力特征[J].石油勘探与开发,2001,28(3):22-24.
[4]张立新,李军,刘淑芝,等.试析歧北凹陷异常压力在深层油气藏成藏过程中的控制作用[J].石油勘探与开发,2000,27(5):19-21.
[5]李会军,程文艳,张文才,等.深层异常温压条件下碎屑岩成岩作用特征初探[J].石油勘探与开发,2001,28(6):28-31.
[6]崔勇等.深层砂岩次生孔隙的成因及其与异常超压泄露的关系—以黄骅坳陷板桥凹陷板中地区滨Ⅳ油组为例[J].成都理工学院学报,2002,29(1):49-52.
[7]李会军,吴泰然,等.板桥凹陷超压抑制作用及成烃特征[J].天然气工业,2004,24(12):20-22.
[8]孟元林,刘德来,等.歧北凹陷沙二段超压背景下的成岩场分析与储层孔隙度预测[J].沉积学报,2005,23(3):389-394.
[9]赵学平,付立新,张服民,等.第三系石油地质基础[M]//大港油田科技丛书.北京:石油工业出版社,1999:8-22.
[10]Hunt J M.Generation and migration of petroleum fromabnormally pressured fluid compartments[J].AAPGBulletin,1990,74:1-12.
[11]LawB E,Ulmishek G F,Slavin VI.Abnormal pressuresin hydrocarbon environments[M].AAPG Memoir,1998,70:1-11.
[2]闫桂京,陈建文,等.超压与油气的关系[J].海洋地质动态,2005,21(9):1-2.
[3]柳广第,王德强.黄骅坳陷歧口凹陷深层异常压力特征[J].石油勘探与开发,2001,28(3):22-24.
[4]张立新,李军,刘淑芝,等.试析歧北凹陷异常压力在深层油气藏成藏过程中的控制作用[J].石油勘探与开发,2000,27(5):19-21.
[5]李会军,程文艳,张文才,等.深层异常温压条件下碎屑岩成岩作用特征初探[J].石油勘探与开发,2001,28(6):28-31.
[6]崔勇等.深层砂岩次生孔隙的成因及其与异常超压泄露的关系—以黄骅坳陷板桥凹陷板中地区滨Ⅳ油组为例[J].成都理工学院学报,2002,29(1):49-52.
[7]李会军,吴泰然,等.板桥凹陷超压抑制作用及成烃特征[J].天然气工业,2004,24(12):20-22.
[8]孟元林,刘德来,等.歧北凹陷沙二段超压背景下的成岩场分析与储层孔隙度预测[J].沉积学报,2005,23(3):389-394.
[9]赵学平,付立新,张服民,等.第三系石油地质基础[M]//大港油田科技丛书.北京:石油工业出版社,1999:8-22.
[10]Hunt J M.Generation and migration of petroleum fromabnormally pressured fluid compartments[J].AAPGBulletin,1990,74:1-12.
[11]LawB E,Ulmishek G F,Slavin VI.Abnormal pressuresin hydrocarbon environments[M].AAPG Memoir,1998,70:1-11.
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