用早期试井资料计算低渗裂缝井地层压力的一种方法

A method for calculating formation pressure in low permeable fractured well using earlier well test data

低渗透油田的压力恢复试井资料一般不能测出径向流直线段,称为早期试井资料。但是低渗透油田往往裂缝比较发育,并且油井都须压裂投产。本文针对这种情况分析了裂缝井压力恢复测试早期的井底渗流特征,井底的早期渗流属于裂缝单向流动,并依据长关井压力恢复资料建立了利用早期试井资料计算地层压力的实用方法。

Pressure restore well test data of low permeable oil fields cannot test the straight line segment of radial flow, being called earlier well test data. However, low permeable oil fields have a lot of fractures developed, and oil wells need fracturing. This paper analyzes the bottom hole flow characteristics in the earlier period of pressure restore test in fractured wells. Earlier flow in bottom hole is fracture single direction flow. It constructs a method for calculating formation pressure using earlier well test data according to long shut-in pressure restore data.