前期的气藏评价表明,四川盆地元坝区块自流井组页岩气藏可能具有商业开发潜力.但其埋藏深度多在4000 m以上,远远超过了美国页岩普通层位深度范围(76～2440 m),因此,该区块深层页岩气藏的开发在国内外都属于独创性研究.在综合评价气藏的基础上,借鉴方深1井的页岩气藏改造经验,结合页岩气藏压裂机理,通过对入井管柱、压裂液配方、压裂规模和参数等多方面的研究,初步形成了适合于元坝区块深层页岩气藏的大型压裂工艺,并在YB9井实验获得成功,对同类深层页岩气藏勘探开发大型压裂施工具有借鉴意义.%Initial evaluation shows that, the artesian well groups in shale gas reservoirs of Yuanba region in Sichuan basin have potential to produce commercial amounts of natural gas. Buricd depth of the shale reservoirs is 4000 meters, which far exceeds the buried depth range of common layers of shale reservoirs in America. So stimulation technology research on this kind of reservoirs becomes the original one at home and abroad. On the basis of gas reservoirs comprehensive evaluation, taking references and experiences from the stimulation of Well FS1, researches of multiple aspects have been conducted which includes running string, formula of fracturing fluid, fracturing size and parameters combined with fracturing mechanism of shale gas reservoirs. Through, large-scale fracturing technology appropriate for shale reservoirs initially formed in Yuanba region, and achieved success in experiment of Well YB9. Pilot experiment analysis provides meaning references for large-scale fracturing technology in similar deep shale gas reservoirs.
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