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塔里木油田A气藏埋藏深、压力高、应力大、天然裂缝发育、储层厚度大,是典型的超高压裂缝型气藏。储层笼统压裂效果差,采用分层压裂改造技术,取得较好的效果。针对超高压深井裂缝型气藏分层压裂难度大的特点,优选完井封隔器+压裂封隔器+滑套作为分层压裂工具;采用测井地应力解释和优化射孔模拟方法,进行分层优化;密度为1.32g/cm3的加重压裂液体系能降低井口施工压力;使用高压施工设备,能满足地面高施工压力的要求。针对超高压深井裂缝型气藏分层改造技术的研究和认识,对类似气藏改造有借鉴和推广作用。
A gas reservoir in Tarim Oilfield is buried under deep pressure, high pressure, large stress, natural fractures, reservoir thickness, is a typical ultrahigh pressure fractured gas reservoir. General fracturing effect of the reservoir is poor, the use of fracturing technology to achieve better results. In view of the difficulty of fracturing the fractured gas reservoirs in ultra-high pressure deep well, the fracturing packer + fracturing packer + sliding sleeve is the preferred tool for fracturing. The interpretation of well logging stress and the optimization of perforation simulation Method for stratified optimization; the density of 1.32g / cm3 aggravate fracturing fluid system can reduce the pressure of wellhead construction; the use of high-pressure construction equipment to meet the high ground pressure requirements. Aiming at the study and understanding of stratified reformation technology for fractured gas reservoirs in ultra-high pressure deep wells, it can be used as reference and extension for similar gas reservoirs reformation.