长岭凹陷葡萄花油层油源及成藏控制因素分析

Oil?鄄source correlation and controlling factor analysis of hydrocarbon accumulation
for Putaohua reservoirs in Changling Sag

葛岩1,2黄志龙1,唐振兴3,许恩爱4,赵伟2

Ge Yan1，2, Huang Zhilong1, Tang Zhenxing3, Xu En′ai4, Zhao Wei2

1.中国石油大学(北京)油气资源与探测国家重点实验室,北京102249;2.中海油能源发展钻采工程研究院,天津300452;3.中国石油吉林油田公司勘探开发研究院,吉林松原138001;4.中国石油大港油田公司第三采油厂,河北沧州061035

1.State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China; 2.Drilling Engineering Institute of Energy Development, CNOOC, Tianjin 300452, China; 3.Research Institute of Exploration and Development, Jilin Oilfield Company, PetroChina, Songyuan 138001, China; 4.No.3 Oil Production Plant, Dagang Oilfield Company, PetroChina, Cangzhou 061035, China

通过地质、地化、地球物理等资料的综合研究，明确了松辽盆地南部长岭凹陷葡萄花油层的油源关系及油气成藏条件。根据饱和烃生物标志物组成及其相关参数，将葡萄花油层原油划分为A，B两大类。油源对比表明，长岭凹陷北部查干泡地区葡萄花油层原油来自青山口组烃源岩，南部黑帝庙地区葡萄花油层原油与嫩一段烃源岩有亲缘关系。分析认为：有效烃源岩厚度、地层剩余压力及断裂活动在平面分布的差异，导致长岭凹陷南北葡萄花油层原油来自不同的油源；查干泡地区青一段烃源岩地层存在巨大的超压，断裂活动与烃源岩生排烃期具有良好的匹配关系，有利于油气在姚一段成藏；黑帝庙地区青一段原油不具备进入姚一段的运移通道，而嫩一段地层压力足以驱动油气沿断层发生下排。

Through comprehensively studying the geology, geochemistry and geophysics data, the relationship of oil?鄄source rock and the hydrocarbon accumulation conditions of Putaohua reservoirs in Changling sag of southern Songliao Basin are determined. Based on the biomarker composites and relative parameters of saturated hydrocarbon, the oil of Putaohua reservoirs can be divided into Type A and Type B. The results of oil?鄄source correlation shows that the oil in Putaohua reservoirs of Chaganpao Area is from K2qn1 source rock, but the oil in Putaohua reservoirs of Heidimiao Area similarly has relationship with K2n1 source rock. Analysis results show that there are very large differences about Putaohua reservoirs in south and north Changling Sag because the thickness, overage pressure of stratums and faults unsteady periods are extremely different. In Chaganpao Area, the overpressure of K2qn1 formation is very high, the matching relationship between the fault activities and source rock expulsion periods of K2qn1 are good, as a result, the oil can accumulate in Putaohua reservoirs. There are not passages in Heidimiao Area to make the oil migrate into K2y1 formation, but the overpressure in K2n1 formation is enough to make the oil migrate downward along faults.

10.6056/dkyqt201304001