渤海湾盆地辽河油田石油地质综合分析(2)

石油地质课程设计

Abstract Based on the petroleum geology means and the previous research results, through the comparation of geological structure, tectonic evolution, structure styles, elements of pool forming and distribution characteristics of hydrocarbon, the main controlling factors of deference richness in the depression(Damintun Depression,Depression and Eastern Depression) of Liaohe Subbasin were discussed.

In a depression, the characteristics of reservoir enrichment were controlled by the distribution of oil generating sag. Most oil and gas distributed around the oil generating sag as a ring. In addition, faults' forming phases and activity intensity make an important influence on the oil-bearing series and reservoir's type. In Damintun Depression, the early faults' activity were very strong but the late faults' activity were very weak, so the oil and gas mainly gathered in the buried hill and Es3.In Eastern Depression, the early faults' activity were very weak, but the inherited faults' activity were very strong, so the hydrocarbon mainly gathered in Es3 and the upper strata. In Western Depression, there are lots of faults in all of the stage, so the oil and gas stored in various strata. Because there are few faults in Neogene strata, theNeogene oil and gas is very less.

Key words Liaohe Subbasin; geological structure; elements of pool forming; accumulatio model; main controlling.

引言（）

辽河油田开发范围主要包括辽河盆地陆上、滩海和外围盆地，三大领域共发育35个大小不等的中新生代盆地。截止2004年底，老区三大领域共发现37个油田，探明含油面1080．8 km2，探明石油地质储量22．4263×108 t。按油品性质划分，探明稀油地质储量8．9284×108 t，稠油地质储量10．3006×108 t，高凝油地质储量3．1973×108 t。探明天然气地质储量1905．28×108 m3，其中气藏气710．17×108 t，占37．3％，伴生气1 195．11 ×108 m3，占62．7％。截止2004年底，投入开发32个油田，动用含油面积747．910 km2，动用石油地质储量17．5714×108 t，现开采方式下可采储量4．3137×108 t，标定采收率24．5％。

辽河盆地陆上是一个地质条件十分复杂的复式油气区，总结起来具有“五