摘要
经流体包裹体测定 ,辽河盆地东部凹陷油气成藏有 3次主要的充注期。早期 (3 6Ma)相当于沙河街组一段沉积期至东营初期 ;中期 (3 4～ 2 5Ma)相当于东营中晚期 ;晚期相当于晚第三纪至现今。由于存在多期幕式充注 ,导致流体性质在垂向上、平面上均存在不均一性。欧利坨子地区存在深部原油的成熟度较浅部原油的低 ,即成熟度倒转的现象 ;而茨榆坨地区则存在高垒带高部位原油成熟度低 ,相对处于低部位的牛青地区成熟度较高。运用这一特点 ,可以有针对性地开展勘探工作 。
The testing results of fluid inclusion indicate that there were three charging stages of the oil and gas reservoirs in the eastern sag of Liaohe basin. The early stage (36 Ma) is equivalent to the deposition of the first member of Shahejie Formation to early Dongying; the middle stage (24～24 Ma) is corresponding to middle-late Dongying; and the late stage corresponds to Neogene up to the present time. The episodic and multiphase charging result in the heterogeneity of fluid properties both laterally and vertically.The deep crude in Oulituozi area has lower maturity than that in the shallow part, that is a phenomenon of reversed maturity. However, the crude maturity in the higher part of high horst zone in Ciyutuo area is higher than that in the relatively low position in Niuqing area. It is then suggested that exploration activity might be launched to enhance success ratio by using this feature.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2003年第1期32-35,共4页
Oil & Gas Geology
基金
国家重点攻关项目"松辽盆地及渤海湾盆地北部复杂隐蔽油气藏地质评价和勘探开发关键技术研究"(2 0 0 1BA6 0 5A - 0 8- 0 4 )
