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《可降解纖維暫堵轉(zhuǎn)向壓裂技術(shù)的室內(nèi)研究及現(xiàn)場試驗.pdf》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、第40卷第3期天然氣勘探與開發(fā)可降解纖維暫堵轉(zhuǎn)向壓裂技術(shù)的室內(nèi)研究及現(xiàn)場試驗尹俊祿劉歡池曉明孫新龍中國石油川慶鉆探工程公司長慶井下技術(shù)作業(yè)公司摘要針對鄂爾多斯盆地蘇里格氣田特低滲透氣藏氣井壓后單井產(chǎn)量不高、經(jīng)濟(jì)效益不理想的問題,研發(fā)了可降解纖維暫堵轉(zhuǎn)向壓裂技術(shù)。該技術(shù)通過向儲層裂縫中注入暫堵劑纖維,形成暫堵壓力,迫使裂縫發(fā)生轉(zhuǎn)向,進(jìn)而增大有效滲流面積以提高單井產(chǎn)量。通過室內(nèi)優(yōu)化評價試驗,優(yōu)選出暫堵用可降解纖維直徑為loum、長度為8mm、混砂加入量為12‰時暫堵效果最佳,降解性能良好,對儲層滲透率傷害較小。通
2、過現(xiàn)場試驗結(jié)合裂縫監(jiān)測技術(shù),驗證了暫堵轉(zhuǎn)向纖維進(jìn)入儲層后,壓力上升明顯,裂縫發(fā)生了轉(zhuǎn)向,可以實現(xiàn)人工裂縫強(qiáng)制轉(zhuǎn)向,達(dá)到溝通有利儲層的目的,可降解纖維暫堵轉(zhuǎn)向壓裂技術(shù)在現(xiàn)場應(yīng)用有效、可行,且取得了較好的改造效果。該技術(shù)現(xiàn)場操作簡單、應(yīng)用效果良好,為蘇里格氣田特低滲透氣藏開發(fā)提供了新的思路。關(guān)鍵詞鄂爾多斯盆地蘇里格氣田水力壓裂可降解纖維暫堵裂縫轉(zhuǎn)向改造體積纖維降解性儲層傷害實驗室研究現(xiàn)場試驗DOI:10.12055佗askk.issn.1673—3177.2017.03.018Experimentalstudya
3、nd6eldtestofdegradable6berbasedtemporaryplugginganddiVersionf.racturingtechnologyYinJunlu,LiuHuan,ChiXiaomin2,SunXinLong(、ChangqingDownholeoperntionCompnny.CNPCCh戡nnqingDrillingEngineeringcompnnyLimited.xi’nn.shnnrtxi7iooi8.Chin口、Abstract:Afterfracturingisc
4、arriedoutintheextra—lowpermeabilitygasreservoirsinSuligeGasfield,theOrdosBasin,thesin-gle—wellproductionrateis10wandtheeconomicbenentisunsatisfactory.Tosolvethisproblem,adegradablefiberbasedtemporaryplugginganddiVersionf}acturingtechnologywasproposed.Byvirt
5、ueofthistechnology,thefiber,asthetemporarypluggingagent,isinjectedintoreservoirfracturestoformthetemporarypluggingpressure,whichforcesthefracturestodivert.Thus,theeffectiveseepageareaisincreasedandsin91e-wellproductionrateiscorrespondinglyimproved.Laborator
6、yoptimizationevaluationtestwasperf.omedtooptimizethedegradablefiberfbrtemporaryplugging.Itisshownthatmetemporarypluggingeffectisthebest,degrada-tionperformanceisgoodandthedamageonreservoirpermeabilityis1ess,whenthediameterand1engthofdegradablefiberare1O“man
7、d8mm,respectively’andsandcontentis12‰.Itisdemonstratedby6eldtesttogetherwithfracturemonitoringtechnoIogythatthepressureincreasessignificantlyandf}acturesaredivenedafterthefibersfbrtemporaIyplugginganddiversionarei11jectedintoreser—Voirs.Consequently,art訊cia
8、lfracturesareforcedtodiVertandfavorablereservoirsarecommunicated.Itisverifiedthatthedegrad-ablefiberbasedtemporaI.yplugginganddiVersionf}acturingtechnologyisf色asibleandeffbctiVeinfieldapplication,prese