吐哈盆地斜坡带致密储层物性上限研究  

Upper Limits of the Physical Properties of Tight Reservoir in the Slope Belt of the Turpan-Hami Basin

作　　者：田伟超 卢双舫 王伟明 李文浩 王贵磊[3] 闫旭[3] 

机构地区：[1]中国石油大学(华东)非常规油气与新能源研究院,山东青岛266580 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [3]中国石油大庆油田有限责任公司第五采油厂,黑龙江大庆163513

出　　处：《天然气地球科学》2015年第11期2107-2113,2141,共8页Natural Gas Geoscience

基　　金：中央高校基本科研业务费专项资金(编号:R1521008A);国家自然科学基金(编号:41302103;41402122;41330313;41172134)联合资助

摘　　要：开展致密储层物性上限研究对明确研究区油气成藏机理及分布规律具有重要帮助。应用临界喉道半径探讨了吐哈盆地水西沟群斜坡带致密储层物性上限问题。临界喉道半径的求取需要对孔隙与喉道半径比、润湿角、油水或气水密度差等关键参数进行确定,利用恒速压汞实验、润湿性分析、PVT等实验对上述关键参数进行了拟合。结果表明:研究区的孔隙与喉道半径比约为90,润湿角约为20.48°;致密储层物性上限随着地层倾角的增大而减小,且致密气储层物性上限比致密油更加严格;研究区的地层倾角约为15°,此条件下致密油储层和致密气储层的临界喉道半径分别为0.552μm和0.491μm,相应致密油储层物性上限是8.43%和0.378×10^(-3)μm^2,致密气储层物性上限是8.39%和0.358×10^(-3)μm^2。Studying on the upper limits of physical properties of tight reservoir is important for the mechanism research of hydrocarbon accumulation and distribution.The critical throat radius was used to discuss the upper limits of physical properties of tight reservoir in the slope belt of the Shuixigou Group of the Turpan-Hami Basin.The computation of critical throat radius needs to determine several key parameters,such as the ratio of the pore radius and throat radius,wetting angle,difference value between oil or gas density and water density.These key parameters can be acquired by constant-rate mercury penetration technique,wettability analysis,PVT and other experiments.The results show as follows.The ratio of the pore radius and throat radius for tight reservoir is about 90,and wetting angle is approximately 20.48°.Upper limits decrease as formation dip increases,and upper limits of tight gas are more stringent than that of tight oil.Critical throat radius of the tight oil and gas reservoirs are 0.552μm and 0.491μm respectively at a strata dip of 15°,and the according upper limits of physical properties in the tight oil reservoirs are 8.43%and0.378×10^（-3）μm^2,while they are 8.39%and 0.358×10^（-3）μm^2 in the tight gas reservoirs.

关 键 词：致密储层 物性上限 水西沟群 斜坡带 吐哈盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]