水平井短时间关井静压确定方法研究

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.

Method for Determining Static Pressure for Horizontal Well Short-time Shut In

In consideration of the situation of no buildup test for horizontal wells because of condition restriction, it is proposed that the method of using unbalanced pressure to correct calculated formation pressure (static) during short-time shutin of maintenance. The method is theoretically reliable of easy operation, by which the bigger error induced when measured bottomhole pressure used instead of static formation pressure is avoided. It is used for data correction of horizontal wells of 2 unsaturated sandstone reservoirs in Tarim Oilfield, the accuracy of static pressure valve is obviously improved after the correction, by which reliable formation pressure data are provided for dynamic analysis of reservoirs and practical for horizontal well testing.