摘要
通过精细岩心观察、普通薄片、铸体薄片及扫描电镜等资料,对兴城气田营四段砾岩储层的储集空间类型进行了研究.结果表明,兴城气田营四段为一套特低孔、特低渗并发育裂缝的砂砾岩储层,孔隙度平均为3.7%,渗透率平均为0.2×10-3μm2;该区砾岩发育3类9种储集空间,即原生孔隙、次生孔隙和裂缝,其中原生孔隙包括原生粒间孔和杂基微孔2种类型,次生孔隙包括砾内溶孔、砾间溶孔、铸模孔、胶结物内溶孔及收缩孔5种类型,裂缝包括成岩缝和构造缝2种类型.影响储集空间发育的控制因素主要包括构造运动、成岩作用及砾石成分.
By subtle core observation, rock thin-section identification, cast thin-section picture statistic analyses, and scanning electron microscopic analysis, the reservoirs space type of Ying-4section in Xingcheng gas field is clarified. Study shows that Ying-4 section is a set of conglomerate reservoir with extremely low porosity , permeability and presenting fissure, the average porosity is 3.7% and the average permeability is 0.2 millidarcy. Reservoir space type can be divided into 3 types and 11 subtypes, namely, primary pore, secondary pore and fissure. Primary pore includes primary granular pore, matrices tiny pore; secondary pore include dissolution pore of gravel, dissolution pore among gravel, moldic pore, dissolution pore of cement and diminish pore; fissure includes diagentic fissure and structure fissure; The factors which control the reservoir space type is tectonic movement, diagenesis and the component of conglomerate.
出处
《大庆石油学院学报》
CAS
北大核心
2008年第3期101-104,140,共4页
Journal of Daqing Petroleum Institute
关键词
兴城气田
营四段
储集空间
控制因素
砾岩储层
Xingcheng gas field
Ying-4 section
reservoir space
control factor
conglomerate reservoir
