渤海湾盆地东营背斜构造塌陷成藏机制研究

STUDY ON POOL-FORMING MECHANISM BY TECTONIC COLLAPSE IN THE DONGYING ANTICLINE OF THE BOHAIWAN BASIN

赵密福 冯春丽 刘亚丽

ZHAO Mi-fu FENG Chun-li LIU Ya-li

中国地质大学, 北京, 100083 2. 胜利油田地质科学研究院, 山东, 东营, 257000

China University of Geology, Beijing 100083, China 2. Institute of Geological Sciences, Shengli Oilfield, Dongying, Shandong 257000, China

渤海湾盆地东营背斜油气主要聚集在东营组和馆陶组,而其东西两侧的辛镇背斜和现河断阶带,油气则主要聚集在沙二段.在油源、储集、运移、圈闭及保存等条件研究的基础上,认为东营背斜油气藏在平面、纵向分布上有很大的差异,这与区域构造背景、区域盖层、断裂活动及三者之间的时空匹配关系密切相关.构造活动期间,构造塌陷作用能导致油气大面积、快速的纵向运移,并且这种运移具有很大的突发性和事件性;在构造活动的平静期,多数断裂逐渐失去通道性,油气可能沿着少数大的、活动的断裂发生单相渗流.上述二者共同构成了东营背斜复杂的油气垂向运移.

In the Dongying Anticline of the Bohaiwan Basin, hydrocarbon was mainly accumulated in the Dongying and the Guantao formations. And on its eastern and western two sides, i.e., the Xinzhen Anticline and the Xianhe Fault Step Zone, hydrocarbon was mainly accumulated in the Sha-2 Member. Based on the study of hydrocarbon source, accumulation, migration, trapping and preservation conditions, it was considered that the distribution of hydrocarbon pools in the Dongying Anticline was of great differences on the plane from longitudinally, which were closely related to regional structural background, regional cap-rock, fault activities and the time-space matching relations among the three. During the active periods of structures, tectonic collapse resulted in the rapid longitudinal migration of hydrocarbon in wide area, which was characterized by paroxysmal and eventful. As during the calm periods of tectonic activities, most of faults lost the behaviours of passages gradually and hydrocarbon may seep monophasically along a few big active faults. The two mentioned above formed together the complex vertical migration of hydrocarbon in the Dongying Anticline.

中国石油化工总公司课题(KT99 T103)

https://doi.org/10.11781/sysydz200406547