11--煤层气勘探开发技术

第十一章煤层气的勘探开发技术第一节钻采工艺技术第二节煤层气的开采技术第三节煤层气（瓦斯）抽放方法第一节钻采工艺技术一、布井方式1、直井单井、井组2、水平井丛式井、分枝水平井、羽状水平井3、采空区钻井直井钻井现场GZ-2600钻机丛式中配套钻具三牙轮镶齿钻头进尺150-300m直井钻井现场晋1～1晋1～2晋1～5晋1～4晋1～3晋试1233.6178.0199.5m164.3m194.6m117.6m173.5m188.4m224.5m179.8mN井组布置水平井钻井现场丛式井风动潜孔冲击器5LZ165-7Y螺杆分枝水平井3031.7830303532.0925303535353525V-P1T108-2(Oct192003)X-T3002-1(Oct62003)X-T3002-2(Oct72003)X-T3002-4(Oct92003)X-T3002-3(Oct82003)V-P1T107-7(Oct132003)V-P1T107-6(Oct92003)V-P1T107-5(Oct72003)V-P1T107-4(Oct42003)V-P1T107-3(Oct32003)V-P1T107-2(Oct12003)V-P1T107-1(Sep282003)X-2004-6(Sep262003)X-2004-5A(Sep272003)X-2004-5(Sep262003)X-2004-4(Sep252003)X-2004-3(Sep242003)X-2004-2(Sep242003)X-2004-1A(Sep232003)X-2004-1(Sep222003)V-P1T106-9(Sep262003)DX-E4S28-0(Dec.8)X-T1-1(Dec.6)X-T2-1A(Dec.4)X-T2-2(Dec.5)X-E3S28-1(Dec.12)X-E3S28-2(Dec.13)X-E3S28-3A(Dec.14)X-E3S28-4B(Dec.15)X-E3S28-5(Dec.15)X-E3S28-6(Dec.16)X-E1S28-14(Dec.25)X-E1S28-14A(Dec.26)X-E1S28-13(Dec.27)X-E1S28-12(Dec.29)X-E1S28-11A(Jan.3)X-E1S28-11(Dec.30)X-E1S28-11C(Jan.5)X-E1S28-10(Jan.7)X-E1S28-9(Jan.9)X-E1S28-9A(Jan.10)X-E1S28-9B(Jan.11)X-E1S28-8(Jan.11)X-E4S28-18(Jan.17)X-E4S28-19(Jan.20)X-E4S28-20(Jan.21)X-E4S28-21(Jan.22)X-E4S28-22(Jan.22)X-E4S28-23(Jan.22)X-E4S28-24(Jan.23)X-T1B-13(April42003)X-T1B-12(April52003)V-P1T106-1(April132003)V-P1T106-3(April292003)V-P1T106-2(April222003)V-P1T106-5(May62003)X-T112-1(June12003)X-T112-2(June52003)X-T112-3(June62003)X-T112-4(June72003)X-T112-5(June72003)X-T22-5B(June82003)X-T112-6A(June102003)X-T22-4(June92003)X-T22-3(June92003)X-T22-2(June102003)X-T22-1(June112003)X-E4S29-1(June272003)X-E4S29-2(June262003)X-E4S29-3A(June242003)X-E4S29-4A(June232003)X-E4S29-5(June232003)X-E4S29-6A(June212003)X-E4S29-7(June162003)V-P2T22-8(July282003)V-P2T22-7(July262003)V-P2T22-6(July242003)V-P2T22-5(July212003)V-P2T22-4(July192003)V-P2T22-3(July102003)V-P2T22-2(July162003)V-P1T111-1(June302003)V-P1T111-2(July22003)V-P1T106-6(May162003)V-P1T106-7(May202003)V-P2T22-9(July312003)V-P2T22-10(Aug22003)V-P2T22-11(Aug52003)V-P2T22-12(Aug82003)V-P2T22-14(Aug142003)V-P2T22-13(Aug112003)V-P2T22-15A(Aug202003)V-P2T22-16(Aug222003)V-P2T22-17(Aug262003)V-P2T22-18(Aug312003)V-P2T22-19(Sep42003)V-P2T22-20(Sep82003)V-P2T22-21(Sep112003)X-T104-1(Sep92003)X-T104-2(Sep92003)X-T104-3(Sep102003)X-T104-4(Sep102003)X-T104-5(Sep122003)X-T104-6(Sep122003)X-T104-7(Sep122003)X-T104-8(Sep132003)X-T104-9(Sep142003)X-T104-10(Sep162003)X-E4S28-0(Dec.8)X-T1-1(Dec.6)X-T2-1A(Dec.4)X-T2-2(Dec.5)X-E3S28-1(Dec.12)X-E3S28-2(Dec.13)X-E3S28-3A(Dec.14)X-E3S28-4B(Dec.15)X-E3S28-5(Dec.15)X-E3S28-6(Dec.16)X-E1S28-14(Dec.25)X-E1S28-14A(Dec.26)X-E1S28-13(Dec.27)X-E1S28-12(Dec.29)X-E1S28-11A(Jan.3)X-E1S28-11(Dec.30)X-E1S28-11C(Jan.5)X-E1S28-10(Jan.7)X-E1S28-9(Jan.9)X-E1S28-9A(Jan.10)X-E1S28-9B(Jan.11)X-E1S28-8(Jan.11)X-E4S28-18(Jan.17)X-E4S28-19(Jan.20)X-E4S28-20(Jan.21)X-E4S28-21(Jan.22)X-E4S28-22(Jan.22)X-E4S28-23(Jan.22)X-E4S28-24(Jan.23)X-T1B-13(April42003)X-T1B-12(April52003)X-E4S28-16(Jan.15)X-E4S28-17(Jan.16)X-E4S28-16(Jan.15)X-E4S28-17(Jan.16)F-W3S28-5(Jun29)F-W3S28-6(Aug7)F-W3S28-5(Jun29)V-P1T108-3(Oct212003)V-P1T108-4(Oct222003)V-P1T108-5(Oct242003)V-P1T108-6(Oct262003)X-T2005-1(Oct242003)X-T2005-2B(Oct242003)V-P1T109-2(Oct292003)V-P1T109-1(Oct282003)V-P1T109-3(Oct302003)V-P1T109-4(Oct312003)V-P1T109-5(Nov22003)V-P1T109-6(Nov32003)V-P1T110-2(Nov62003)V-P1T110-1(Nov52003)V-P1T106-10(Nov152003)40352540DN23490965.5323936457.64747.5353.9mDN254907383936682729DN20490837.2583936430.678763.8414.75mV-P1T106-11(Nov282003)V--1(62003)V--2(102003)羽状水平井羽状水平井群采空区钻井组合钻井地面煤层气抽采井下煤层气抽采二、钻井工艺1、冲击钻钻井浅煤层区：使用轻便自行式液压钻机、顶部驱动钻机和小型车载钻机或普通钻机，采用非泥浆体系循环介质，如空气、水雾、泡沫液做循环介质。2、旋转钻井深煤层区：一般采用常规旋转钻机三、完井工艺1、裸眼完井2、套管完井3、混合完井（或称裸眼/套管完井4、水平排孔衬管完井第二节煤层气的开采技术一、地面排水降压开发煤层气1、洗井2、排水采气工艺技术1）有杆泵排水采气2）螺旋泵排水采气3）电潜泵排水采气4）气举排水采气3、无水产气方法直井排采丛式井排采煤层气集输站煤层气井煤层气井集运脱水三、压缩四、排水处理1、原理物理混凝2、方法过滤法化学试剂法化学脱氧和密闭隔氧3、技术重力沉降压力过滤浮选精细过滤二、ECBM技术1、CO2-ECBM；2、N2–ECBM三、煤储层压裂技术煤储层压裂现场煤储层压裂现场第三节煤层气（瓦斯）抽放方法钻孔抽采，巷道抽采以采空区抽采从抽采的部位上本煤层瓦斯抽采邻近层瓦斯抽采采空区瓦斯抽采从抽采时间上采掘前预抽，边采边抽以采后抽采从抽采管道形状上123穿层钻孔布置顺层钻孔布置临近层抽放采动影响区抽放弯曲下沉带裂隙带冒落带现代化矿井——寺河矿2亿m3/a寺河矿抽放泵站。寺河矿瓦斯涌出量构成图43%4%53%本煤层瓦斯抽放量采空区瓦斯抽放量风排瓦斯量