用户名： 密码： 验证码：
Pool Features and Hydrocarbon Accumulation Analysis of Lacustrine Carbonate Rock: Take Nanyishan Reservior in Qaidam Basin as an Example
详细信息   
摘要
Based on the reservoir and hydrocarbon pool characteristics from Lower Ganchaigou Formation to the Upper Youshashan Formation of carbonate hydrocarbon pool in Nanyishan,comparing with lacustrine clasolite hydrocarbon pool,we found there are differences in source,reservoir,cap,source-reservoir-cap assemblage,trap type,type of oil and gas pools,and relation of all the above in Nanyishan lacustrine carbonate oil and gas pools as follows:(1)Nanshishan structure located in the hydrocarbon-generation kitchen,with numbers of source rocks,and hydrocarbon can be captured from the nearby area.The oil source came from Xiaoliangshan Sag,on the southwest of Nanyihshan.Crude oil in E 23 in the deep was from the source rock in E 23,while N2was from N1.(2)Four hydrocarbon-bearing series in Nanyishan can be grouped into two types.One is a layered lithologic reservoir controlled by the structure in middle-shallow layer.Lithology of the reservoir is micrite limestone or dolomite,algal limestone or dolomite and grain limestone or dolomite.Intergranular pores and solution pores are storage space.The other was a condensate gas pool in the upper E32,taking marlstone or argillaceous dolomite as reservoir and pore-fissure as storage space.(3)The Nanyishan carbonate reservoir and mudstone formed source-reservoir-cap assemblage frequently interbedded in vertical.(4)Nanyishan pool in N 22 had characteristics such as thin reservoir and low permeability.It had elastic drive and solution gas drive as main drive type.Layered lithologic reservoir is controlled by anticline structure.While gas layer of the middle deep condensate gas pool was concentrated in vertical and dominated by the structure and fracture in plane.The productivity capacity was quite different due to fissure storage space.(5) There are three main controlling factors on the formation of Nanyishan pool:Firstly,Nanshishan Structure located in the hydrocarbon-generation kitchen.Hydrocarbon can be captured in the nearby area.Secondly,the fracture and fracture system contributed to the translocating system.Finally,the lacustrine carbonate reservoir played aa key role in the formation of oil and gas pools.(6)Nanyishan structure developed slowly before Pliocene,and the development peak was in Early-Middle Pliocene,but then it stopped.The Lower Ganchaigou Formaion had hydrocarbon generation peak in Early-Middle Pliocene and it formed an authigenic reservoir.The Upper Ganchaigou Formation came into oil generation peak from late Pliocene to Quaternary,and along the northern and southern wing in the structure oil and gas migrated into N1,N 12,N 22 and the reservoirs formed finally.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址：北京市海淀区学院路29号 邮编：100083

电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700