提高煤层气直井动液面解释精度方法研究与应用

Research and Application of Improving the Interpretation Accuracy of Coalbed Methane Vertical Well Dynamic Fluid Levels

煤层气井动液面解释精度对于煤层气井精细化排采管控至关重要,本文对比了接箍法、音标法及声速法等测液面方法的优缺点,分析了影响动液面解释精度的主控因素为井筒温度和气泡段,从而提出了一种提高动液面解释精度的新方法。此方法综合考虑了影响动液面解释精度的各个要素,能够依据所解释液面较为准确地反映煤层气井的井底流压,克服了前期其它方法所存在的一系列问题,为煤层气井精细化排采管控提供保障。

The interpretation accuracy of dynamic fluid levels in coalbed methane wells is crucial for the precise drainage management of coalbed methane wells.The paper compares the advantages and disadvantages of the coupling method,phonographic method,and sound velocity method for measuring liquid level.The main factors influencing the interpretation accuracy of dynamic fluid levels are wellbore temperature and bubble cross-sectional area.A new method is proposed to improve the interpretation accuracy of dynamic fluid levels,which comprehensively considers various factors affecting the interpretation accuracy.This method can reflect the bottom-hole flow pressure of coalbed methane wells more accurately according to the interpreted fluid levels,addressing a series of issues present in previous methods.This provides a guarantee for the precise drainage and production management of coalbed methane wells.