摘要
川中LA油田沙一段油藏为无边水、底水的构造岩性复合油藏,单井测试日产原油在几吨至上百吨之间。储层具典型的低孔低渗特征,产层段孔隙度一般在3%~6%之间,平均3.9%;渗透率集中在1.0×10-4~1.0×10-3μm2之间,平均2.64×10-4μm2。静态、动态资料及机理实验研究均反映出其储层类型为裂缝—孔隙型。本文在常规方法研究的基础上,开拓性采用了核磁共振、渗流能力模拟、岩心产能模拟等实验方法,明确了该油藏有效储层物性下限基质孔隙度为3%,基质渗透率为0.17×10-3μm2,为储量计算提供了依据。同时对低孔低渗储层评价也具重要意义。
The J_2s1 (first member of Shaximiao Formation, Middle Jurassic) oil reservoir in LA field in Central Sichuan is a structural-lithologic complex reservoir without edge water and bottom water, the single well test daily oil production ranging from several tons to about one hundred tons. The reservoir is typically characterized by low porosity and low permeability and the productive section has porosities of 3%-6%, averaging 3.9%, and permeabilities of 0.1×103—1.0×103 μm2, averaging 0.264×10 -3 μm2. According...
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2005年第S1期28-31,11,共5页
Natural Gas Industry
关键词
四川盆地
中部
侏罗纪
低孔低渗
砂岩
储集层
物性下限
Lower porosity and low permeability
Sandstone reservoir
Petrophysical cutoff
Jurassic Period
LA
