CAJ | 학술논문

煤层气井压裂过程中,支撑剂嵌入会影响支撑裂缝的导流能力,从而严重影响煤层气的开发.为了研究支撑剂嵌入不同坚固性煤岩程度及支撑裂缝导流能力,测定了典型矿区煤岩的坚固性系数,运用LD-1A导流能力测试系统进行了支撑剂嵌入不同煤岩及导流能力模拟实验.实验表明,端氏、龙门塔和寨崖底煤岩的坚固性系数分别为1.4、0.4和0.5,35 MPa时,支撑剂嵌入柳林龙门塔煤岩的深度为0.5 mm,嵌入对导流能力损害率可达40%;不同矿区煤岩的坚固性系数差异很大,坚固性系数越小,支撑剂嵌入煤岩越严重,导流能力损害程度越大.该研究可为现场压裂施工提供依据.
매층기정압렬과정중,지탱제감입회영향지탱렬봉적도류능력,종이엄중영향매층기적개발.위료연구지탱제감입불동견고성매암정도급지탱렬봉도류능력,측정료전형광구매암적견고성계수,운용LD-1A도류능력측시계통진행료지탱제감입불동매암급도류능력모의실험.실험표명,단씨、룡문탑화채애저매암적견고성계수분별위1.4、0.4화0.5,35 MPa시,지탱제감입류림룡문탑매암적심도위0.5 mm,감입대도류능력손해솔가체40%;불동광구매암적견고성계수차이흔대,견고성계수월소,지탱제감입매암월엄중,도류능력손해정도월대.해연구가위현장압렬시공제공의거.
@@@@In?the?process?of?well?fracturing?for?CBM?formations,?proppant?embedment?in?coal?rock?can?affect?fracture?flow?conduc-tivity?and?the?development?of?CBM.?In?order?to?study?proppant?embedment?in?different?firmness?coal?rock?and?flow?conductivity,?the?coal?rock?firmness?coefficients?in?representative?fields?were?measured.?Proppant?embedment?and?fracture?flow?conductivity?experiments?were?conducted?with?LD-1A?proppant?conductivity?testing?system.?The?result?shows?that?the?firmness?coefficients?of?Duanshi,?Longmenta?and?Zhaiyadi coal rocks are 1.4, 0.4 and 0.5, the depth of proppant embedment in Liulin Longmenta coal rock is 0.5 mm, and the degree of flow?conductivity?damage?by?proppant?embedment?can?reach?40%,?when?the?closure?pressure?is?35?MPa.?The?firmness?coefficient?of?dif-ferent?coal?rock?differs?greatly.?The?smaller?the?firmness?coefficient?is,?the?deeper?the?proppant?embedment?in?the?coal?rock?will?be,?and?the?greater?the?degree?of?fracture?flow?conductivity?damage?will?be.?With?the?experimental?data?and?production?experience,?the?study?has?some?reference?for?fracturing?practice?in?field.