二连盆地岩性油藏的幕式充注和相对早期成藏特征分析

在对二连盆地三大主力凹陷的成藏条件、埋藏史、热演化史分析的基础上,结合成岩流体包裹体特征分析,利用流体包裹体均一化温度定量分析方法确定了二连盆地油藏的成藏期次,认为二连盆地岩性油藏具有幕式充注的特征.通过与相同凹陷同一层位构造油气藏成藏期的对比分析后认为,岩性油藏的成藏期具有相对早期的特征.岩性圈闭形成的早期性为岩性圈闭在较早时期捕集油气提供了有利的条件,同时岩性圈闭的多期形成和油气的多期幕式充注有利于大型岩性油气藏的形成.

Characteristics of relative early reservoiring and episodic charging of lithologic oil pools in Erlian basin

The analyses of reservoiring conditions, and burial and thermal history of the three major depressions in Erlian basin, combined with the study on the characteristics and the quantitative analysis of homogenization temperature of its diagenetic fluid inclusions, lead to the conclusion that the lithologic pools in the basin feature in episodic hydrocarbon charging. A comparison with the reservoiring periods of the structural pools at the same horizon in this depression suggests that the lithologic oil pools were formed relatively early. The early formation of lithologic traps was favorable for the early capture of hydrocarbons, and the multistage formation of the lithologic traps and episodic multistage charging of hydrocarbons was conducive for the formation of large-scale lithologic pools.