提高煤层气井动液面精度方法探讨

Discussion on Methods of Improving the Accuracy of Dynamic Fluid Level for CBM Wells

精确的动液面数据是煤层气井定量化排采管控的关键生产参数,动液面的高低严重影响单井的产气效果。本文从分析动液面现场测试、动液面数据的计算、音速值的设定三个方面,详细论述了其对煤层气井动液面精度的影响,并根据煤层气井液面浅、要求精度高、连续监测的特点,提出了一套适合煤层气井现场要求的测试计量方法和音速值的选定,提高动液面测试的精度,为煤层气井定量排采控制提供保障。

With regard to the have quantitative drainage management on CBM wells,accurate dynamic fluid level data is a key production parameter which seriously affects gas production of individual well.Based on the analysis of methods of obtaining and computing field data and setting the value of sound speed,this paper discusses how these factors affect the precision of dynamic fluid level data.The features of the dynamic fluid level of CBM wells includes shallow depth,requires high precision and continuous monitoring.Based on these features,the paper proposes some suitable methods about obtaining and computing data and setting the value of sound speed.Times of practice show these methods can improve the accuracy of dynamic fluid level and guarantee the quantitative drainage management of CBM wells.