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克拉玛依油田八区乌尔禾组渗透率极低,地层导压系数小,压力波传导慢。自1975年投入试验开发后,从历年测得的压力恢复曲线来看,关井时间长(为150小时左右),续流段长,拐点不明显,直线段难于确定,油层压力计算值不准,对油田动态分析带来了一定的困难。为解决这一问题,1981年5—9月在该区开展了测压试验工作,在井网面积上选择了9口井为测压试验井(井号:Jy—3、8502、8515、8521、8551、8556、8565、8618、8641)。根据测压成果,本文就八区乌尔禾油层压力的计算方法和压力恢复曲线续流段的校正方法一短时试井的应用加以讨论。
The Wuerhe Formation in the Karamay Oilfield has extremely low permeability, small formation pressure coefficient and slow pressure wave propagation. Since 1975, when it was put into trial and development, the pressure recovery curve measured over the years shows that the shut-in time is long (about 150 hours), the length of the free-flow section is long, the inflection point is not obvious, the straight-line section is difficult to be determined, , Which brings some difficulties to the dynamic analysis of the oilfield. In order to solve this problem, piezometric tests were carried out in the area from May to September in 1981, and 9 wells were selected as pressure test wells (No.:Jy-3,8502,8515,8521 , 8551, 8556, 8565, 8618, 8641). According to the results of manometry, this paper discusses the calculation method of Wuerhe reservoir pressure in eight districts and the application of a short time test to the correction method of freewheeling section of pressure recovery curve.