东营、沾化凹陷压力结构差异及其影响因素

发布时间：2018-10-05 18:26

【摘要】：根据东营、沾化凹陷的实测地层压力的统计、泥岩声波时差测井响应以及超压剖面发育特征的研究,将东营、沾化2个凹陷的超压划分为单一强超压和复合超压2种超压系统。单一强超压系统分布在东营凹陷,纵向上发育1个超压系统(沙三—沙四段),超压系统发育规模大、分布范围广、超压幅度强,压力系数可达2.0。复合超压系统分布在沾化凹陷,纵向上发育3个超压系统,上超压系统位于沙一段,超压幅度较弱,最大压力系数不超过1.4;中超压系统位于沙三段,超压幅度较强,压力系数可达到1.8;下超压系统位于沙四下亚段,超压幅度也较强。压力结构的差异性与烃源岩的发育层系、热演化的程度、压力封闭层的分布以及断裂活动密切相关。
[Abstract]:According to the statistics of measured formation pressure in Dongying and Zhanhua sag, the response of mudstone acoustic time difference logging and the development characteristics of overpressure profile, the overpressure of Dongying and Zhanhua sag is divided into two kinds of overpressure systems: single strong overpressure and compound overpressure. The single strong overpressure system is distributed in Dongying sag and has a longitudinal overpressure system (Sha-3-Sha 4 member). The overpressure system has a large scale, wide distribution range, strong overpressure amplitude, and pressure coefficient can reach 2.0. The compound overpressure system is distributed in Zhanhua sag, and there are three overpressure systems developed in the longitudinal direction. The upper overpressure system is located in the first section of the sand, the overpressure amplitude is weak, the maximum pressure coefficient is not more than 1.4, the middle overpressure system is located in the third section of the Shahejie formation, and the overpressure range is strong. The pressure coefficient can reach 1.8, and the lower overpressure system is located in the sub-section of Sha 4, and the overpressure amplitude is also strong. The difference of pressure structure is closely related to the development of the source rock, the degree of thermal evolution, the distribution of the pressure closed layer and the fault activity.
【作者单位】：中国石化股份胜利油田分公司勘探开发研究院;
【基金】：国家科技重大专项“渤海湾盆地精细勘探关键技术”(编号:2016ZX05006)
【分类号】：P618.13

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