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深层气藏往往伴随着高温、高压、低孔、低渗、高破裂压力等特点;因此随着压裂改造的井深不断增加,施工难度也不断增大。鉴于目前深井改造存在风险大、成功率低、增产效果差等难题,结合川西地区须家河组气藏工程地质实际,通过分析川合148、139井压裂改造中存在的问题,从破裂压力的降低、压裂材料的优选、小型压裂测试等方面,提出了深层低渗透气藏高效压裂关键性技术对策。
Deep gas reservoirs are often accompanied by characteristics such as high temperature, high pressure, low porosity, low permeability and high fracture pressure. Therefore, with the increasing well depth of fracturing, the construction difficulty is also increasing. In view of the problems such as high risk, low success rate and poor stimulation effect of deep well reconstruction, combining with the engineering geology of Xujiahe Formation gas reservoirs in western Sichuan, the existing problems in fracturing reformation in well 148 and 139 were analyzed, Reduction, optimization of fracturing materials and small fracturing tests, the key technical countermeasures for efficient fracturing of deep low permeability gas reservoirs are proposed.