摘要
基于断陷盆地深洼区岩性圈闭成因类型分析和成藏过程的研究,指出深洼区岩性油气藏成藏机理主要为隐蔽输导和幕式置换。由此引申,深洼区岩性圈闭是油气运聚过程中的小型油气集输站:油源断层将众多岩性油气藏中的油气水幕式汇聚到中浅层大中型构造圈闭,同时,砂岩透镜体等岩性圈闭的地层水不断被排出,造成早期油气聚集在盆地外部、晚期油气聚集在盆地内部的环状分布。该成果无疑有利于指导断陷盆地的隐蔽油气藏勘探。
Based on analyzing the genesis types and reservoir-forming course of the lithological trap in the deep sub-depression in downfaulted basin, reservoir-forming mechanism of lithological pool is subtle passage and episodic replacement. Derived results is that lithological traps are miniature oil-gas gathering and transferring stations in course of hydrocarbon migration and accumulation, hydrocarbon of numerous litholocgical pools is episodically gathered by faults, forms large and medium size tectonic pools; simultaneously, formation water of lithological traps, such as sand lens, is time after time ejected, and it causes in that the oil and gas is annularly distributed outside the basin during the early stage and inside the basin during late stage. The effort benefits the exploration of subtle reservoir in downfaulted basin.
出处
《油气地球物理》
2005年第4期49-53,共5页
Petroleum Geophysics
基金
中国石油化工股份有限公司"济阳坳陷隐蔽油气藏成藏动力学研究及预测"项目(P03038)的核心内容
