中国煤炭地质
中國煤炭地質
중국매탄지질
COAL GEOLOGY OF CHINA
2013年
6期
62-63,73
,共3页
煤层气井%钻探施工%水泥低返%二次固井%套管事故%射孔法
煤層氣井%鑽探施工%水泥低返%二次固井%套管事故%射孔法
매층기정%찬탐시공%수니저반%이차고정%투관사고%사공법
CBM well%drilling operation%lower cement returning%second well cementing%casing accident%perforation method
射孔是煤层气井施工中的一个重要环节,常规射孔作业是在施工过程中将煤层气套管在煤层位置射穿。根据射孔法的这一原理,探索出了一些在煤层气井钻探施工过程中的非常规应用。结合HD-150和ZH-266煤层气钻井的实例,采用射孔工艺,依据测井数据选择合适的射孔位置,通过聚能射孔弹射穿套管,成功的处理了固井过程中的水泥低返和套管作业过程中的煤层坍塌事故,保证了两口煤层气井的正常完工,避免了重大的经济损失。
射孔是煤層氣井施工中的一箇重要環節,常規射孔作業是在施工過程中將煤層氣套管在煤層位置射穿。根據射孔法的這一原理,探索齣瞭一些在煤層氣井鑽探施工過程中的非常規應用。結閤HD-150和ZH-266煤層氣鑽井的實例,採用射孔工藝,依據測井數據選擇閤適的射孔位置,通過聚能射孔彈射穿套管,成功的處理瞭固井過程中的水泥低返和套管作業過程中的煤層坍塌事故,保證瞭兩口煤層氣井的正常完工,避免瞭重大的經濟損失。
사공시매층기정시공중적일개중요배절,상규사공작업시재시공과정중장매층기투관재매층위치사천。근거사공법적저일원리,탐색출료일사재매층기정찬탐시공과정중적비상규응용。결합HD-150화ZH-266매층기찬정적실례,채용사공공예,의거측정수거선택합괄적사공위치,통과취능사공탄사천투관,성공적처리료고정과정중적수니저반화투관작업과정중적매층담탑사고,보증료량구매층기정적정상완공,피면료중대적경제손실。
Perforation is a major link in CBM well construction;conventional perforation task is to perforate the CBM casing right at coal seam horizon. Based on this principle of perforation method, has tracked out some unconventional applications during CBM well drilling process. Combined with examples of HD-150 and ZG-266 CBM wells, according to well logging data has selected proper perforating ho-rizon, using shaped charge to perforate casing, successfully handled lower cement returning during well cementing and coal seam col-lapse accident during casing lowering, ensured normal completion of two CBM wells, avoided great economic losses.