车镇凹陷石油地质特征及勘探远景

Petroleum and Oil Geology and Exploratory Prospect of Chezhen Sag

车镇凹陷是济阳坳陷西北部的一个中、新生代陆相断陷盆地,发育沙四段、沙三段、沙一段三套烃源岩。储集层类型多,除碳酸盐岩、碎屑岩储层外,还发育火成岩、变质岩和泥岩等类型的储层。车镇凹陷具有多套储盖组合、多种圈闭类型、多期聚集成藏、圈闭形成期与油气运聚期匹配较好的特点,油气成藏条件十分有利。车镇凹陷的剩余资源量达4.6×108t以上,具有巨大的勘探潜力,低勘探程度区和新含油气层系是主要勘探方向。

Chezhen sag, located at the northwest of Jiyang Depression, is a Mesozoic and Cenozoic rift basin. Three series of source rocks such as Esd, Es3 and Esl of Eogene were well developed in this sag. Oil-gas reservoir condition is multiform including carbonatite, clasolite as well as magmatite, metamorphite and fractured mudstone. Chezhen sag has multi-combination of reservoir-cap, multi-type of trap, and multi-period of hydrocarbon migrating and gathering which match with the trap forming, so it has favorable condition to form oil-gas pools. The unexplored petroleum resource of Chezhen sag is over 4.6 ×10^8t. Therefore, Chezhen sag has enormous exploration potential. It is considered that the lower exploration area and new oil-bearing series are the major exploratory directions.