松辽盆地西部斜坡油气来源与运移研究  

Oil and gas source and migration on West Slope of Songliao Basin

作　　者：张维琴[1,2] 杨玉峰[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院 [2]大庆石油学院,黑龙江大庆163318

出　　处：《大庆石油地质与开发》2005年第1期17-19,22,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：通过地球化学指标分析, 松辽盆地西部斜坡的原油大多属于成熟原油, 与齐家 -古龙凹陷的原油有相似性, 而与西部斜坡本身的未熟-低熟烃源岩可比性差; 咔唑类含氮化合物分析数据显示由东向西屏蔽型含氮化合物 (运移距离远) 相对含量逐渐增大, 而裸露型含氮化合物 (运移距离短 ) 相对含量逐渐减小, 表明西部斜坡原油发生了较长距离的运移; 嫩一、二断湖相泥岩形成的区域性盖层, 姚家组、青山口组砂岩, 姚家组底区域不整合面以及单倾的斜坡使齐家-古龙凹陷生成的油气具备了向西部斜坡发生运移的地质条件。Geochemical indexes analysis shows that the oil on West Slope of Songliao Bain is mostly mature oil,similar to the oil in Qijia-Gulong Sag,but different to the immature-low mature source rock in West Slope.The analysis data of carbazole nitrogen containing compound shows that the content of shielding nitrogen containing compound(long migration distance) increases from the east to the west,while the content of exposed nitrogen containing compound(short migration distance) decreases,showing that the oil in West Slope migrated in a long distance. The regional cap formed by the lacustrine shale in Nen I and II members, sandstone in Yaojia and Qingshankou members, unconformity in the bottom of Yaojia Member, and single slanted slope provide the geologic conditions for the hydrocarbon generated in Qijia-Gulong Sag to migrate toward West Slope.

关 键 词：松辽盆地 油源对比 油气运移 成藏模式 

分 类 号：TE122.1[石油与天然气工程—油气勘探]