二连盆地阿尔善构造带油气分布与聚集规律

系统研究了阿尔善构造带油气运移与圈闭的匹配关系、生储盖组合特征等 ,认为该区多套烃源岩为复式油气藏的形成提供了多期充足的油源 ,多种油气运移通道为油气长距离运移创造了条件 ,多种储集岩体、多套生储盖组合为油气聚集提供了有利的储集场所 ,油气多次运移与多期形成的圈闭的良好配置关系 ,导致区内发育多种油气藏类型 ,在平面上不同层系油层叠加连片 ,形成良好的复式油气聚集区带 .油气分布规律研究同时显示 ,油气分布具有纵向上相对集中 ,平面上受油气优势运移通道的影响 ,呈带状分布的特征 .据此按照含油气系统理论与油气优势运移通道理论 ,指导油气勘探开发取得良好效果 ,并为该区进一步深化滚动勘探指明了方向

Hydrocarbon distribution and accumulation laws of Aershan structural zone in Erlian Basin

Based on the study of the sedimentary and structural evolution history, it is found that in Aershan structural zone, there are abundant reservoir rocks and various types of hydrocarbon traps developed in different stages near main oil source depression,and they are very good conditions to form hydrocarbon accumulation belts on a certain scale. The marching relationships between oil gas migration and traps are systemically studied, and the combination characters of oil source bed, reservoir rock and overlying formation are determined. Multiple sets of hydrocarbon source rocks supply multistage abundant oil sources for the formation of multiple oil gas reservoirs, various kinds of migration pathways help oil and gas to migrate in a long distance. Various reservoir rocks and multiple combinations of oil source bed, reservoir rocks and overlying formation provide favorable oil and gas accumulation rooms. The better collocating relationships between multiple times of migration and multistage traps bring forth various types of oil gas reservoirs in different series of strata, which superpose and join each other in plane to form better complex oil gas accumulation zones. The laws of oil gas distribution show that oil gas distribution has a banding character, which centralizes relatively in longitudinal direction and is influenced by dominance migration pathway principle in plane. According to oil gas bearing system theory and dominance migration pathway principle, oil gas exploration and development has achieved a very good result, and the direction of next rolling prospecting in Erlian Basin is pointed.