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针对水平井因条件限制而无法进行压力恢复试井的实际情形,提出了利用检修短时间关井机会测取的未平衡压力校正计算地层压力(静压)的处理方法。该方法理论可靠,简单实用,克服了用实测井底压力代替地层静压存在的较大误差。该方法通过塔里木油田2个未饱和砂岩油藏水平井的实际资料验证,校正后的静压值精度明显提高。该方法为油藏动态分析提供了可靠的地层压力资料,对水平井的试井测试有着重要的实用价值。
In view of the fact that horizontal wells can not be pressure-re-tested due to the restriction of conditions, a method for calculating formation pressure (static pressure) by using unbalanced pressure correction measured by short-time shut-in opportunity is given. The method is reliable in theory, simple and practical, and overcomes the big error of replacing the formation static pressure with the measured bottom hole pressure. The method is verified by the actual data of two horizontal wells in the unsaturated sandstone reservoir of Tarim Oilfield. The precision of the corrected static pressure value is obviously improved. This method provides reliable data of formation pressure for dynamic analysis of reservoirs and has important practical value for well testing of horizontal wells.