Study on test technology of coalbed methane interference test well

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.