地面压力计试井技术在D气田应用的可行性

Feasibility of Applying Well Testing Tech with Surface Pressure Gauge in D Gas Field

D区块致密气藏关井压力恢复缓慢,压恢测试时间长,必须通过下入井下压力计来实现。但由于井下节流器的存在,关井测压的初期不能代表真实的储层压力恢复;同时,井下压力测试工艺繁琐,成本高,不利于气田动态监测的降本增效。基于气藏工程理论的基础,利用地面压力计来折算井底压力,并通过实测井底压力进行对比矫正,有效地避免了井下节流器对压力测试的影响,简化了压力测试工艺,节约了测试成本,在D区块压力监测方面获得了较好地应用,为D气田的生产管理和科研工作提供了较可靠、充分的理论依据。

Recovery of shut-in pressure in dense gas reservoir of the D blocks is slow,time for build-up pressure test is long,so operation of lowering underground pressure gauge is needed.While,the existence of down-hole choke,the early stages of the shut-in pressure survey does not represent the real reservoir pressure recovery,and at the same time,the down-hole pressure testing process is cumbersome and costly,which is not conducive to the dynamic monitoring of the field.Based on the basis of gas reservoir engineering theory,using the pressure by surface pressure gauge to convert the bottom hole pressure,and through comparison and correction of the measured bottom hole pressure,the influence of down-hole choke on pressure test is effectively avoid,which simplifies the pressure test process,saves test cost,gets a better application in pressure monitoring work in block D and provides a reliable and sufficient theoretical basis for production management and scientific research work.