基于续流量校正的早期试井分析方法

目前,国内外已有很多有关早期试井资料的分析方法,文中从中优选出了一种能够更简单地解决基于常井筒存储条件下短期资料的分析技术,根据其基本公式,推导其压差、压力形式的直线方程,并求得各种地层参数.利用该校正方法,可以得到直线段出现早的分析图,揭示被井储掩盖的早期油藏动态,从而提高早期数据的利用率,测试时可以较大地缩短关井时间,使试井与生产的矛盾在一定程度上得以缓解.

A Early-Time Well Test Analysis Technique Based on Afterflow Calibration

A number of early-time well test analysis techniques have been presented up to now in the world.This paper investigates one of them and uses it to analyze the short-term data of well test with constant wellbore storage.Based on the mathematical model,we derive the straight-line equation of the pressure and pressure change,and obtain the formation parameters.The straight line will appear more early on a semilog plot by using the afterflow calibration method.Further,the early behavior sheltered by the wellbore storage will be discovered so that the test time could be shortened much more by utilizing the early time data,and contradications between the well test and production will be alleviated.