CAJ | 학술논문

顺9井区志留系碎屑岩储层存在埋藏深、温度高、物性差和底水发育，前期直井压裂后无法获得稳定产能的问题，为此，开展了水平井一体化开发技术研究。按照钻井、完井和压裂一体化设计的思想，水平井方位角设计为137.7°，与最大主应力方向正交，以提高压裂后泄油面积；使用油基钻井液钻进，保证井径规则，便于分段完井工具坐封；优选耐温130℃、耐压差70 M Pa的裸眼封隔器，保证分段成功，并将压裂端口置于储层发育段，便于裂缝起裂；通过降低胍胶浓度和优化添加剂用量，形成耐温130℃的低伤害压裂液；采用油藏数值模拟方法优化压裂施工参数，应用常规压裂＋人工隔层控缝高技术实现避水高度30 m ，控缝高、深穿透压裂，形成顺9井区致密油藏水平井一体化开发关键技术。现场试验表明，水平井压裂后产能较直井提高4倍，2口井累计产油量达1.02×104 m3。水平井一体化开发技术提高了顺9井区致密油藏开发效果，对国内同类致密油藏开发具有一定借鉴意义。
순9정구지류계쇄설암저층존재매장심、온도고、물성차화저수발육，전기직정압렬후무법획득은정산능적문제，위차，개전료수평정일체화개발기술연구。안조찬정、완정화압렬일체화설계적사상，수평정방위각설계위137.7°，여최대주응력방향정교，이제고압렬후설유면적；사용유기찬정액찬진，보증정경규칙，편우분단완정공구좌봉；우선내온130℃、내압차70 M Pa적라안봉격기，보증분단성공，병장압렬단구치우저층발육단，편우렬봉기렬；통과강저고효농도화우화첨가제용량，형성내온130℃적저상해압렬액；채용유장수치모의방법우화압렬시공삼수，응용상규압렬＋인공격층공봉고기술실현피수고도30 m ，공봉고、심천투압렬，형성순9정구치밀유장수평정일체화개발관건기술。현장시험표명，수평정압렬후산능교직정제고4배，2구정루계산유량체1.02×104 m3。수평정일체화개발기술제고료순9정구치밀유장개발효과，대국내동류치밀유장개발구유일정차감의의。
Block Shun 9 ,a Silurian clastic reservoir ,is characterized by deep burial depth and high temperature ,poor physical property and bottom water development .Due to the lack of stable productivity for vertical wells after hydraulic fracturing in the primary stage in Block Shun 9 ,the integrated develop-ment performance for horizontal wells was studied .Based on integrated drilling ,completion and hydraulic fracturing ,a horizontal well was drilled in NE137 .7° ,perpendicular to the maximum horizontal stress ,to increase oil drainage area for a later production stage .Oil based drilling fluid was used to prevent borehole instability issues and to more easily set the completion packer .In this case ,the optimal packer in open hole could be used under 130 ℃ and 70 MPa ,and the target stimulation section was selected in the fracture de-veloped zone th facilitate fracture initiation .Fracturing fluid was developed that would have a lower dam-age rate to reservoir and would be able to resist 130 ℃ reservoir temperature by reducing the concentration of guar gum and optimizing the additive .a numerical reservoir simulation was conducted to optimize the parameters of fracturing treatment .Conventional methods and a designed barrier for fracture height con-trol were used to control fracture height and keep them within 30 m to avoid connection with the water zone .The techniques of integrated tight reservoir development with horizontal well in Block Shun 9 were developed .The application in two wells showed that the productivity of horizontal wells after hydraulic frac-turing was 4 times higher than that from vertical wells ,and oil production reached to 1.02 × 104 m3 .This study demonstrated that integrated development with horizontal wells is an effective method in tight reservoir develop-ment in Block Shun 9 ,and can be taken as a reference to the development of tight reservoirs .