CAJ | 학술논문

根据低渗透油气藏体积改造工艺提出的大排量、高液量、高砂量、形成复杂缝网的技术要求，开展了裸眼封隔器滑套分段压裂技术配套关键工具的研制与试验工作。开发了耐高压复合式封隔器和新型可分解压裂球2种关键工具。复合式封隔器整体结构更紧凑，通径更大，裸眼适应性更好。与传统复合材料球相比，新型可分解球具有承压指标高、可自行分解无需回收等优点。与吉林油田合作在莫里青致密油藏开展压裂工具的现场试验工作。试验中完井管柱下入顺利，封隔器坐封动作正常，可分解球入座、起压、承压正常，压裂施工参数达到设计要求，压裂液返排时无残留物。现场试验结果表明，压裂工具完全满足非常规油气藏体积改造工艺的技术要求。
근거저삼투유기장체적개조공예제출적대배량、고액량、고사량、형성복잡봉망적기술요구，개전료라안봉격기활투분단압렬기술배투관건공구적연제여시험공작。개발료내고압복합식봉격기화신형가분해압렬구2충관건공구。복합식봉격기정체결구경긴주，통경경대，라안괄응성경호。여전통복합재료구상비，신형가분해구구유승압지표고、가자행분해무수회수등우점。여길림유전합작재막리청치밀유장개전압렬공구적현장시험공작。시험중완정관주하입순리，봉격기좌봉동작정상，가분해구입좌、기압、승압정상，압렬시공삼수체도설계요구，압렬액반배시무잔류물。현장시험결과표명，압렬공구완전만족비상규유기장체적개조공예적기술요구。
The key tools for open-hole packer-sleeve multistage fracture are develop ed and testedfor recovering low-permeable reservoir in terms of technical requirement on SRV,which is in-volved in high flow rate,mass proppants and complicated fracture network etc.The development of hybrid-structure packer for HP condition and new dissolvable ball was carried out.Hybrid-structure packer has been designed,produced and subjected to several workbench tests to function with the compact structure,large drift diameter and better zonal isolation in open-hole wellbore. Compared with the traditional Composite ball,new operation ball based on the dissolvable alloy material is developed with the advantages of high pressure resistance,self-dissolving and low op-eration risk of retrievement over the composite ball.The field test in Moliqing tight oil reservoir of Jinlin Oilfield has been performed with successful deployment of completion and setting of new packer.During fracture operation,the dissolvable ball is dropped,set in sleeve seat with pressure build-up successfully.Any residual of the dropped ball was not found during the back-flow of fracturing fluid.It is proved that new downhole tools shown above meet fully demand on SRV for developing unconventional reservoir.