辽河盆地大民屯凹陷流体压力特征(英文)

被引：2

作者：

叶加仁

郝芳

陈建渝

陈振岩

机构：

[1] 中国地质大学资源学院

[2] 辽河石油勘探局勘探开发研究院

来源：

海洋地质与第四纪地质 | 2003年 / 04期

关键词：

压力分布; 压力演化; 超压强度; 大民屯凹陷;

D O I：

10.16562/j.cnki.0256-1492.2003.04.020

中图分类号：

P544.4 [];

学科分类号：

摘要：

大民屯凹陷是辽河断陷内 4个下第三系凹陷之一。在综合利用钻井、试井及地震等资料的基础上 ,系统研究并论述了大民屯凹陷流体压力特征。基于 5 7口井的声波测井资料 ,凹陷内泥岩压力特征可区分为正常压力、异常压力或强超压等类型 ;根据 15 2口井 391个点的压力测试数据 ,凹陷内产油层段的压力梯度多接近于 1;利用公式法模拟计算了 4 7条地震剖面的流体压力、剩余压力及压力系数的分布特征 ,凹陷内剖面压力系统自上而下一般由正常压力、弱超压和强超压 3部分组成。此外 ,还根据流体压力演化的基本原理及钻井、岩性与试井等实际资料 ,模拟恢复了大民屯凹陷的压力演化史 ,其可划分为超压原始积累、超压部分释放及超压再积聚 3个阶段。总体上 ,大民屯凹陷的超压强度低于渤海湾盆地其他地区的超压强度

引用

页码：83 / 94

页数：12

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