摘要
鄂尔多斯盆地苏里格气田东区砂岩储层岩性致密,渗流规律复杂。通过气水相渗实验、铸体薄片、高压压汞和恒速压汞等分析测试,对研究区盒8-山1段储层的相渗特征进行分析。尝试将研究区气水相渗曲线由好到差分为I^IV类,其中具有II类和III类气水相渗曲线特征的储层分布最为广泛。分析认为孔喉半径大小、孔喉分选和孔喉连通性的好坏是决定储层渗流能力的主要控制因素。
Most sandstone reservoirs in eastern Sulige gasfield, Ordos Basin, are featured by tight lithology and more complex seepage laws. So, to study their relative-permeability characteristics is significant. In this study, the natures of one reservoir from Shihezi 8 to Shanxi 1 membersare obtained by means of gas-water relative-permeability experiment, casting thin-section identification, high-pressure mercury-injection and constant-rate mercury-injection analysis. Moreover, the gas-water relative-permeability curves can be divided into four types, containing type I,type II, type III, and type IV, in which some reservoirs with the middle two curves have a wide distribution. This study also demonstrates that pore-throat radius size, pore-throat sorting, and pore-throat connectivity are the main factors impacting on seepage property.
出处
《天然气勘探与开发》
2016年第2期31-35,10-11,共5页
Natural Gas Exploration and Development
基金
国家科技重大专项大型油气田及煤层气开发(2011ZX05044)
关键词
苏里格气田东区
致密砂岩储层
相渗
孔隙结构
eastern Sulige gasfield
tight sandstone reservoir
relative permeability
pore structure
