大安沿江地区葡萄花油层油气成藏模式

 大安沿江地区是近年吉林油田重要靶区,其油气成藏模式的剖析是精细地质研究的基础。本文运用源控含油气系统理论,对生、储、盖、圈静态要素及其生、排、运、聚、散动态过程进行了综合研究,初步建立了大安沿江地区葡萄花油层的成藏模式。研究了松辽盆地大安沿江地区葡萄花油层烃源岩埋藏史、油气运聚场,揭示了靶区油气成藏模式及控藏因素。研究表明,葡萄花油层油气主要来自靶区北部的齐家-古龙凹陷青山口组一段源岩,由青一段生成并排出的油,在浮力作用下,经沟通青一段和葡萄花油层的断裂进入葡萄花油层聚集成藏。

Petroleum Accumulation of Putaohua Reservoir in Daan Area along the Nenjiang River

Daan area along the Nenjiang river is an important area of the Jilin oil field. The analysis of the hydrocarbon accumulation model is the basis of fine geological studies. The petroleum accumulation pattern of Putaohua reservoir in Daan area along the river is established by using the ‘source control theory’ and a comprehensive study of the static elements, including the source, the reservoir, the cap rocks, and the dynamic processes, including the generation, the expulsion, the migration, the accumulation and the dispersion. The hydrocarbon accumulation patterns and the controlling factors of the hydrocarbon accumulation in the target area are revealed through the study of the buried history of the source rocks, the paleostructural evolution history, the migration and accumulation field of the hydrocarbon, and the oil-water distribution in the Putaohua reservoir in Daan area along the Nenjiang river. It is shown that the hydrocarbon of the Putaohua reservoir is mainly derived from the underlying source rocks of the Ⅰ segment of the Qingshankou Group, in Qijia-Gulong depression of the north area. The oil is generated and exhausted from the Qingshankou Ⅰ segment, followed by the accumulation into the Putaohua reservoir which is connected by the fault to the Qingshankou Ⅰ segment, under the force of buoyancy.