sGs Unconventional Hydrocarbon Technology Detection (Beijing)Company Limited

为了研究煤层气井井间干扰现象及干扰规律,获得优势渗流通道,在不影响煤层气井产气量的前提下,选取4个井组进行煤层气"一源一汇"干扰试井测试,通过对激动井注水、观察井开井生产的模式,在井间形成压力降,应用压降叠加理论,定量研究分析了煤层气排采降压过程中出现的井间干扰现象。结果表明:在选取的4个干扰试井井组中,西南方位部署的2口生产井压力上升明显,显示为连通,井间连通优势方位与试井区域最大地应力方向基本吻合,从实际注水情况看,显示压裂裂缝方向与储层连通方向是一致的,说明西南方向为该煤层气储层的优势渗流通道,井间合理间距为300 m。证实煤层气井间干扰作用可为判断井间连通性及评价井网部署提供有效依据。

in order to study the interierence phenonenon and interference law betw.een the coalbed nethane wells and to obtain the dominant seeage channel onthe premise of no influenceto the gas production of the coaloed nethane wel.there were 4 wll oups seleced for the test of the coalbed methane " one source and onecolcion' inererence test wel. ′th the water in cio in the perurbed wel. he production mode of the osevation wel.the prssure drop formed between the wells and the appication of the pressure drop superpostion theorythe interfrence phenomenon betwee the wells ocured inthecaled meth ane drainage and pressue drop process was quantitatively studied and analyzed. The results showed that in the selected 4intererence etwell aroups.thepressue in as production els oected in the south west were inreased obwiously and were conneced.T he connecion dominant azimuth between the wels and the max geostess diection in the test wel egion wer fited basical . rom a view of the actual wate inj ction cond tfton,the fractured crack direcion and resevoir conection direction were the same.The south-west direcion would be the dominant seepage chanel of the cal reservoir.The raional space between the wels was 31 m.The itererence ole between the coabed methane wells could be effective basis to judge the connection between the wells and to evaluate the layout of the well network.

国家科技重大专项资助项目(2011ZX05063)；