摘要
针对鄂尔多斯盆地伊陕斜坡北部上古生界气水关系复杂、探评井成功率低等问题,通过对伊陕斜坡北部的地震资料进行精细解释,发现这一地区发育复杂的断裂体系。研究表明:断裂走向主要分为EW、NW、NE这3组,正、逆及走滑断层均有发育,由南向北断裂逐渐趋于密集。分析其演化可划分为3个期次:Ⅰ期形成于海西期挤压作用,Ⅱ期形成于燕山期挤压作用,Ⅲ期形成于喜山期走滑拉张作用。结合钻探成果,认为断裂活动可改善储层物性、提供运移通道,控制上古生界低幅度构造圈闭,而后期改造形成的通天断裂对原生气藏具有调整分配或破坏作用。
Aiming at the problems of complex gas-water relationship and low success rate of exploration evaluation wells in the upper Paleozoic in the north of Yishan slope in Ordos Basin,it is found that complex fault system is developed in this area through the fine interpretation of seismic data.The seismic interpretation shows that the faults are distributed by EW,NW and NE trend,characterized by coexistence of normal,reverse and strike-slip properties,and the faults become dense gradually from south to north.The fault evolution can be divided into three stages:stage I formed under the action of Hercynian compression,stage II formed under the action of Yanshanian compression,and stage III formed under the action of Himalayan strike-slip tension.Combined with the drilling results,it is held that the fault activity can improve the reservoir physical properties,provide hydrocarbon migration channels and control the development of low amplitude structural traps of the upper Paleozoic,while the exposed faults which formed in late reconstruction redistribute or destroy the primary gas reservoir.
作者
冯保周
于长录
何太洪
王玉善
冯琦
刘永涛
常圆
FENG Baozhou;YU Changlu;HE Taihong;WANG Yushan;FENG Qi;LIU Yongtao;CHANG Yuan(Changqing Branch of Geophysical Research Institute,BGP Inc.of CNPC,Xi’ an,Shaanxi 710021,China;Sulige Branch,Bohai Drilling Engineering Company Limited of CNPC,Wushen Banner,Inner Mongolia 017300,China;Sulige Gas Field Branch,Xibu Drilling Engineering Company Limited of CNPC,Wushen Banner,Inner Mongolia 017300,China;Hainan Branch,CNOOC (China) Limited,Haikou,Hainan 570312,China)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2022年第2期1-8,共8页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家“十三五”科技攻关重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(2016ZX05050007)。
