渤南洼陷沙四上亚段含油气系统探讨

An approach to the composite petroleum systems of Es_4~1 in Bonan sag,Shengli oil province

由于沾化凹陷渤南洼陷地质条件的特殊性 (多套烃源岩、构造复杂性等 )使沙四上亚段复式含油气系统呈现垂向叠置、由断裂沟通、一藏多源 (既有沙三下亚段、沙四上亚段有机烃源 ,又有深部无机烃源 )的复杂面貌。根据实际情况 ,尝试将渤南洼陷沙四上亚段复式含油气系统进一步划分为Es3 -Es4 ( !)、Es4 -Es4 ( !)、无机烃 -Es4 ( ?)等 3个子系统 ,并对其要素、作用进行了研究。认为在洼陷带向缓坡带方向应主要寻找上倾尖灭型及砂泥岩交互型油气藏 ,在陡坡带方向应主要寻找湖底扇型油气藏 ,在洼陷中心应主要寻找砂岩透镜体型、泥岩裂缝型油气藏以及构造 岩性复合型油气藏等。图 3参 6 (吴富强摘 )

It has been confirmed that the composite petroleum systems of the upper part of the Shasi member in Bonan subsag exist as result of multisets of hydrocarbon resources and the complicated structures etc. The elements and processes of petroleum systems have been respectively researched. It has been discussed that the petroleum system generally depends on the crust-mantle construction. The targets of hydrocarbon exploration and research significances have been pointed out.