摘要
为了查明四川盆地川东北地区北西向构造天然气勘探效果不佳的原因,从研究区构造应力场分布特征出发,探讨构造应力对油气运移的影响,分析了北西向构造的勘探潜力。研究表明,北西向构造距离开江—梁平海槽生烃中心相对较远,并且其构造轴线和断裂展布方向与碳酸盐岩台地上的烃类运移方向垂直相交,加之构造形成时间较晚(以喜山期为主),各类因素综合作用使北西向构造成藏条件较差,最终导致大多数北西向构造勘探失利。
In order to understand the reason of ineffective gas exploration in the NW structure in Northeast Sichuan Basin, this paper studies tectonic stress distribution and its impact on hydrocarbon migration, and analyzes the exploration potential in the NW structure. The study shows that the NW structure is relatively far away from Kaijiang—Liangping submarine-channel hydrocarbon generation center, its tectonic axis and fracture propagation direction are perpendicular to the hydrocarbon migration direction in the carbonate platform, and the structure was formed in a later time(mainly in Himalayan period). All these factors work together to lead to poor conditions of hydrocarbon accumulation in the NW structure, and finally result in exploration failure in most of the NW structure.
出处
《特种油气藏》
CAS
CSCD
2008年第3期14-19,共6页
Special Oil & Gas Reservoirs
基金
四川省重点学科建设项目"矿产普查与勘探"(SZD0414)资助
关键词
构造应力场
成藏条件
油气运移
勘探潜力
川东北地区
tectonic stress field
hydrocarbon accumulation condition
hydrocarbon migration
exploration potential
Northeast Sichuan Basin
