摘要
利用岩心观察、薄片鉴定、粒度分析及地震和测井解释等分析方法,对开鲁盆地陆家堡坳陷陆西凹陷九佛堂组砂体成因类型及储集性能进行研究。结果表明,储集砂体主要为曲流河三角洲前缘水下分流河道砂体、辫状河三角洲前缘水下分流河道砂体、扇三角洲前缘水下分流河道砂体和滑塌浊积扇砂体4种类型,其储集性能主要表现为高—中孔、低—特低渗。3类水下分流河道砂体自凹陷南西、南东、北东和北西向五十家子庙洼陷呈收敛状分布,浊积扇砂体则发育在以上3类砂体的前端,呈星点状散布于五十家子庙洼陷的深湖—半深湖相沉积中。3类水下分流河道砂体主要为分布在凹陷主干断裂附近的构造油气藏的储集层,五十家子庙洼陷中九佛堂组上段的滑塌浊积扇砂体可形成砂岩透镜体型岩性油气藏,是今后勘探的有利目标。
Comprehensive analysis of seismic, log, core and granularity data shows that there are four genetic types of sand bodies in Cretaceous Jiufotang Formation in I.uxi Sag, including sand bodies of subaqueous distributary channels in the front of meandering river delta, braided river delta and fan-delta, and sand body of fluxoturbidite fan. They have middle to high porosity and low to very low permeability. The sand bodies of subaqueous distributary channels converge towards the Wushijiazimiao subsag from the southwest, southeast, northeast and northwest of the Luxi Sag. The fluxoturbidite fans are developed in front of those sand bodies and scattered in half deep to deep lake facies of the Wushijiazimiao subsag. The subaqueous distritutary channels sand bodies are reservoirs of the structural petroleum pools near the main fault in Luxi Sag, and the fluxoturhidite fans of the upper segment of Jiufotang Formation developed in Wushiiiazimiao subsag may form lenticular sand lithological pools and are the preferred exploration targets in the future.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2008年第5期569-575,共7页
Petroleum Exploration and Development
基金
中国石油辽河油田分公司重大项目“辽河探区西部凹陷油气深化勘探理论与实践”
关键词
陆西凹陷
九佛堂组
砂体
成因类型
储集性能
Luxi Sag
Jiufotang Formation
sand body
genetic type
reservoir property
