CAJ | 학술논문

深水、超深井储层埋藏深度大,地层破裂压力高,压开地层难度大,对压裂设备和管柱的承压要求很高,造成深水油气田压裂作业施工压力高、风险大,同时海上平台或作业支持船空间有限,难以装备大型压裂设备进行压裂施工.为了尽量减小施工规模,降低井口注入压力,研究了一种自生热耐高温高密度压裂液体系,并对该压裂液体系进行室内性能评价与现场摩阻测试.实验结果表明,该压裂液体系密度达到1.5 g/cm3,降阻率达到59.6%以上,能够耐温140℃.自生热体系的引入缩短了压裂液破胶时间,产生的气体能促进压裂液破胶后返排.
심수、초심정저층매장심도대,지층파렬압력고,압개지층난도대,대압렬설비화관주적승압요구흔고,조성심수유기전압렬작업시공압력고、풍험대,동시해상평태혹작업지지선공간유한,난이장비대형압렬설비진행압렬시공.위료진량감소시공규모,강저정구주입압력,연구료일충자생열내고온고밀도압렬액체계,병대해압렬액체계진행실내성능평개여현장마조측시.실험결과표명,해압렬액체계밀도체도1.5 g/cm3,강조솔체도59.6%이상,능구내온140℃.자생열체계적인입축단료압렬액파효시간,산생적기체능촉진압렬액파효후반배.
?For?deeply?buried?and?high?formation?fracturing?pressure?of?deep?water?ultra?deep?reservoir,?it?is?difficult?to?break?the?rock?stratum?and?the?pressure-bearing?requirements?for?fracturing?equipment?and?pipe?strings?are?extremely?high.?So?fracturing?operation?in?deep?water?reservoir?always?faces?high?construction?pressure?and?high?risk,?meanwhile,?the?limited?space?makes?it?difficult?to?equip?large?fracturing?equipment?on?offshore?platforms?or?operating?support?vessels.?In?order?to?minimize?the?construction?scale,?reduce?wellhead?injection?pressure,?this?paper?discussed?an?autogenetic?heat?and?high?temperature?resistant?high-density?fracturing?fluid?system,?and?then?performance?evaluation?in?the?laboratory?and?in-situ?friction?measurement?were?conducted?for?this?new?fracturing?fluid?system.?The?ex-periment?results?show?that?the?density?of?fracturing?fluid?was?1.5?g/cm3,?and?friction?reducing?rate?can?reach?to?59.6%?with?temperature?resistant of 140℃.Introduction?of?autogenetic-heat?system?has?greatly?shortened?the?breaking?time?of?fluid?and?the?associated?gas?could?promote?fracturing?fluid?flowback?after?gel?breaking.