摘要
本文论述了位于干旱盆地边缘山麓洪积扇相粗碎屑岩的沉积成岩特征,说明了矿物和结构成熟度欠佳的富含火山岩屑砂岩中,自生沸石的析出、溶解和孔隙的演变与烃类聚集之间的内在联系,阐述了乌尔禾系砾岩油田的储集类型属微裂缝-孔隙型(次生孔隙).自生方沸石是地下次生孔隙发育带的标志矿物.沿克拉玛依—乌尔禾大断裂的古洪积扇的扇腰、扇面上古河槽主流线方向及位于生油岩上倾方向的砾岩体是有利油气聚集的远景区,砾岩体内因差异成岩作用形成了(?)、储、圈闭的有利岩性组合与有利构造位置的配置,这对形成工业油气藏是非常有利的.
With the discussion on the characteristics of sedimentary diagenesis for conglomerates of peidmont diluvial fan facies on the dry basin margin, the inner relations of the resolution, solution and porosity evolution of authi-genic zeolites with hydrocarbon accumulation in sandstone enriched in volcanic elastics with poor minerals and low textural maturities were explained. The author related the reservoirs for oil fields with conglomeratic rocks in Urho system to minor fissure-pore type (secondary pores). Authigenic zeolites are index minerals for the growing band of secondary pores. In the direction of stream line of palaeo-river channel on the fan waist and the sector, and in the updip of source rocks along Karamay-Urho rift, there are conglomeratic bodies within which good collocation of lithological assemblage of cap-reservoir-trap and ideal structural deposition were formed, which are favou-rable for the formation of commercial oil and gas pools.
出处
《石油实验地质》
CAS
CSCD
北大核心
1989年第4期349-359,共11页
Petroleum Geology & Experiment
