化学凝胶堵剂承压堵漏技术在顺北3井的应用
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摘要
顺北3井是位于塔里木盆地顺托果勒低隆北缘构造的一口勘探井,该井二叠系火成岩裂缝发育,地层胶结差、易破碎,承压能力弱,钻井时发生6次井漏,先后使用桥浆、水泥浆等堵漏方式,堵漏效果不佳,一次堵漏成功率低。针对二叠系地层承压能力弱等问题,通过复配使用多种特殊纳米级堵漏材料,研制出一种化学凝胶堵剂HND-1。通过机理分析可知,HND-1具有"多元协同封堵"作用,能够大幅地提高地层的承压能力。室内性能评价结果表明,用HND-1配制的化学凝胶堵漏浆的稠化时间在4~20 h内可调,24 h的抗压强度可达12 MPa以上,密度在0.8~2.25 g/cm3内可调,与其他外加剂的配伍性能好。HND-1化学凝胶堵漏浆在顺北3井二叠系裂缝性漏层进行了现场试验,承压效果良好,现场试压5 MPa,30 min压降为0.2 MPa,二叠系当量密度达到1.55 g/cm3,满足了二叠系承压能力的要求。
Well Shunbei-3 is an exploration well located on the north rim of the Shuntuoguole low uplift in Tarim Basin, Xinjiang. This well penetrated the Permian system igneous rocks which have developed fractures, poor cementation, easy-to-break zones and low pressure bearing capacity. Six times of lost circulation during drilling were dealt with bridging agent lost circulation material(LCM)and cement slurry, and the results were unsatisfactory because of low success rate of the first try in lost circulation control. To resolve the lost circulation problem taking place in the low pressure bearing capacity formation of the Permian system, a chemical gel LCM, HND-1, was developed with several nanophase LCMs. Analyses of the mechanisms of HMD-1 indicated that HND-1 had the ability of controlling lost circulation through "synergism" of multiple LCMs, and it can substantially enhance the pressure bearing capacity of formation. Laboratory evaluation demonstrated that chemical gel LCM slurry formulated with HND-1 had thickening time adjustable between 4 h and 20 h, and the compressive strength of the LCM slurry after 24 h was 12 MPa or higher. The HND-1 LCM slurry had density adjustable between 0.8 g/cm3 and 2.25 g/cm3, and was compatible with other drilling fluid additives. The HND-1 LCM slurry was tried in the controlling of lost circulation occurred in the Permian system penetrated by the well Shunbei-3, and good results were obtained. The thief zones were pressurized at 5 MPa, with pressure drop of only 0.2 MPa in 30 min. The equivalent density of the Permian system reached 1.55 g/cm3, satisfying the density requirement for drilling in the Permian system.
Well Shunbei-3 is an exploration well located on the north rim of the Shuntuoguole low uplift in Tarim Basin, Xinjiang. This well penetrated the Permian system igneous rocks which have developed fractures, poor cementation, easy-to-break zones and low pressure bearing capacity. Six times of lost circulation during drilling were dealt with bridging agent lost circulation material(LCM)and cement slurry, and the results were unsatisfactory because of low success rate of the first try in lost circulation control. To resolve the lost circulation problem taking place in the low pressure bearing capacity formation of the Permian system, a chemical gel LCM, HND-1, was developed with several nanophase LCMs. Analyses of the mechanisms of HMD-1 indicated that HND-1 had the ability of controlling lost circulation through "synergism" of multiple LCMs, and it can substantially enhance the pressure bearing capacity of formation. Laboratory evaluation demonstrated that chemical gel LCM slurry formulated with HND-1 had thickening time adjustable between 4 h and 20 h, and the compressive strength of the LCM slurry after 24 h was 12 MPa or higher. The HND-1 LCM slurry had density adjustable between 0.8 g/cm3 and 2.25 g/cm3, and was compatible with other drilling fluid additives. The HND-1 LCM slurry was tried in the controlling of lost circulation occurred in the Permian system penetrated by the well Shunbei-3, and good results were obtained. The thief zones were pressurized at 5 MPa, with pressure drop of only 0.2 MPa in 30 min. The equivalent density of the Permian system reached 1.55 g/cm3, satisfying the density requirement for drilling in the Permian system.
引文
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[13]王广财,王丰年,张军,等.凝胶复合防漏堵漏技术在火焰山腹地表层的应用[J].钻井液与完井液,2017,34(3):49-53.WANG Guangcai,WANG Fengnian,ZHANG Jun,et al.Application of a composite gel lost circulation material in the top section of wells drilled in the central region of the mountain of fire[J].Drilling Fluid&Completion Fluid,2017,34(3):49-53.
[2]陈曾伟,刘四海,林永学,等.塔河油田顺西2井二叠系火成岩裂缝性地层堵漏技术[J].钻井液与完井液,2014,31(1):40-43.CHEN Zengwei,LIU Sihai,LIN Yongxue,et al.Lost circulation control technology for fractured permian ignesous rock formation in well Shunxi2 of Tahe oilfield[J].Drilling Fluid&Completion Fuild,2014,31(1):40-43.
[3]宋玉宽,王悦坚,苏长明,等.低密度膨胀型堵漏技术在塔深1井的应用[J].钻井液与完井液,2006,23(5):53-55.SONG Yukuan,WANG Yuejian,SU Changming,et al.Low density swelling sealing technology in well Tashen-1[J].Drilling Fluid&Completion Fuild,2006,23(5):53-55.
[4]王宏超.低密度膨胀型堵漏浆在湘页1井的应用[J].石油钻探技术,2012,40(4):43-46.WANG Hongchao.Application of expandable in low density slurry plugging technique in well Xiangye 1[J].Petroleum Drilling Techniques,2012,40(4):43-46.
[5]陈建平,张道成.塔河油田S105井承压堵漏技术[J].石油钻探技术,2004,32(2):65-66.CHEN Jianping,ZHANG Daocheng.Pressure sealing technology for S105 Well in Tahe oilfield[J].Petroleum Drilling Techniques,2004,32(2):65-66.
[6]王悦坚.塔河油田恶性漏失堵漏与大幅度提高地层承压技术[J].钻井液与完井液,2013,30(4):33-36.WANG Yuejian.Technology on mud lost control of severe lost circulation and improving pressure containment in Tahe oilfield[J].Drilling Fluid&Completion Fuild,2013,30(4):33-36.
[7]刘金华,刘四海,陈小锋,等.承压堵漏技术研究及其应用[J].断块油气田,2011,18(1):116-118.LIU Jinhua,LIU Sihai,CHEN Xiaofeng,et al.Study and application of pressure bearing and lost circulation technique[J].Fault-Block Oil&Gas Field,2011,18(1):116-118.
[8]王显光,苏长明,薛玉志,等.防漏堵漏新技术在缅甸D区块的应用[J].钻井液与完井液,2011,28(2):51-54.WANG Xianguang,SU Changming,XUE Yuzhi,et al.Application of mud loss prevention and control technologies in block D Myanmar[J].Drilling Fluid&Completion Fuild,2011,28(2):51-54.
[9]苏长明,李家芬,张进双,等.化学堵漏技术在河坝101井的应用[J].钻井液与完井液,2009,26(2):108-109.SU Changming,LI Jiafen,ZHANG Jinshuang,et al.The application of chemical mud loss control method in well Heba101[J].Drilling Fluid&Completion Fuild,2009,26(2):108-109.
[10]王广财,胡刚,李德寿,等.新型承压堵漏技术在吐哈盆地L356井的应用[J].长江大学学报(自科版),2016,13(2):56-60.WANG Guangcai,HU Gang,LI Deshou,et al.Application of a new pressure-bearing and sealing technique in well L356 of Tuha Basin[J].Journal of Yangtze University(Natural Science Edition),2016,13(2):56-60.
[11]邱元瑞,李家库,胡勇科,等.新型承压堵漏技术在冀东油田南堡3-20井的应用[J].石油地质与工程,2013,27(6):138-141.QIU Yuanrui,LI Jiaku,HU Yongke,et al.Application of new pressure sealing technology in well 3-20 of Jidong oilfield[J].Petroleum Geology and Engineering,2013,27(6):138-141.
[12]樊相生,龙大清,罗人文.化学固结承压堵漏技术在明1井的应用[J].钻井液与完井液,2016,33(5):67-71.FAN Xiangsheng,LONG Daqing,LUO Renwen.Application of mud control with chenmical solidification in well Ming-1[J].Drilling Fluid&Completion Fuild,2016,33(5):67-71.
[13]王广财,王丰年,张军,等.凝胶复合防漏堵漏技术在火焰山腹地表层的应用[J].钻井液与完井液,2017,34(3):49-53.WANG Guangcai,WANG Fengnian,ZHANG Jun,et al.Application of a composite gel lost circulation material in the top section of wells drilled in the central region of the mountain of fire[J].Drilling Fluid&Completion Fluid,2017,34(3):49-53.