CAJ | 학술논문

针对泾河油田长8油藏水平井压后初期产量低且递减快的问题，根据连续油管水力喷砂射孔环空多簇压裂的技术原理，结合压裂裂缝诱导应力场分析，对簇间距、射孔参数和施工参数进行了优化，形成了泾河油田长8油藏连续油管水力喷砂射孔环空多簇压裂施工方案：压裂簇间距15～38 m ，射孔位置距离天然裂缝5～10 m ，射孔喷射速度大于190 m／s ，压裂施工排量4～5 m3／min ，前置液比例28％～32％，段加砂量25～45 m3，平均砂比25.5％～27.0％。该技术在9口井进行了现场应用，与优化前相比，一次压开成功率提高39.3％；与单簇压裂相比，平均单井产量提高3.5 t／d。应用结果表明，连续油管水力喷砂射孔环空多簇压裂技术能实现低孔、特低渗砂岩油藏的有效开发，具备推广应用价值。
침대경하유전장8유장수평정압후초기산량저차체감쾌적문제，근거련속유관수력분사사공배공다족압렬적기술원리，결합압렬렬봉유도응력장분석，대족간거、사공삼수화시공삼수진행료우화，형성료경하유전장8유장련속유관수력분사사공배공다족압렬시공방안：압렬족간거15～38 m ，사공위치거리천연렬봉5～10 m ，사공분사속도대우190 m／s ，압렬시공배량4～5 m3／min ，전치액비례28％～32％，단가사량25～45 m3，평균사비25.5％～27.0％。해기술재9구정진행료현장응용，여우화전상비，일차압개성공솔제고39.3％；여단족압렬상비，평균단정산량제고3.5 t／d。응용결과표명，련속유관수력분사사공배공다족압렬기술능실현저공、특저삼사암유장적유효개발，구비추엄응용개치。
To solve the problem of low primary production and quick decline of horizontal wells after hydraulic fracturing in Chang 8 Formation of Jinghe Reservoir ,coiled tubing hydraulic sand blasting perfo-ration and multiple clusters fracturing technique was proposed .Through the analysis of this techniques characteristics ,the optimization of cluster spacing ,perforation and treatment parameters were optimized . Based on the optimum treatment design ,we set cluster spacing to 15 38 m ,pad ratio 28% 32% ,sand plug 25 45 m3 ,average sand ratio 25.5% 27% .This technique has been put in 9 wells design and it showed that treatment success rate had increase 39 .3% and single well production increased 3 .5 tons per day .Through the application ,it demonstrated that coiled tubing hydraulic sand blasting perforation ,and multiple clusters fracturing technique is effective in the development of sandstone reservoirs with low po-rosity ,low permeability .