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苏里格气田地层低压特征明显。可利用测井资料借助伊顿法准确计算其地层压力。首先对声波时差和密度曲线进行井眼影响校正并建立东区、西区地层正常压实趋势线,然后采用伊顿法计算地层孔隙压力,与实测资料的相对误差在10%以内,满足安全钻井工程要求。对工区多口井的测井资料进行了地层压力精细解释处理,在此基础上研究了该气田东区、西区二叠系地层孔隙压力的纵横向分布规律。
The characteristics of low pressure in the Sulige gas field are obvious. Log data can be used to calculate the formation pressure accurately using the Eaton method. Firstly, the wellbore influence correction is made on the acoustic jet lag and the density curve, and the normal compaction trend line of the east and west strata is established. Then the pore pressure of the formation is calculated by the Eaton method, and the relative error between the measured data and the measured data is within 10% to meet the requirements of safety drilling engineering. The log data of multiple wells in the work area are interpreted and interpreted in detail by the formation pressure. On this basis, the vertical and horizontal distribution of pore pressure in the Permian strata in the eastern and western regions of the gas field are studied.