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巴喀致密砂岩气藏作为勘探开发重点区块,增储上产潜力较大,为有效降低对天然气藏污染,进而提高单井产量和真实评价区块储量规模,本文在分析钻完井难点基础上,开展了深层致密砂岩气藏井身结构、充气状态下注入参数、冻胶阀注入工艺等充气欠平衡技术优化研究,通过欠平衡钻井现场试验,在非目的层和目的层钻井提速、储层保护和发现方面取得了显著的效果,进一步验证了北部山前带和南部斜坡带储层的真实产能,为提高致密砂岩气藏勘探开发效果提供了一条行之有效的途径。
As a key exploration and development block, the Baqi tight sandstone gas reservoirs have great potentials of increasing reserves and increasing yields. In order to effectively reduce the pollution of natural gas reservoirs and improve the single well production and the scale of real evaluation block reserves, , The wellbore structure of deep tight sandstone gas reservoirs, inflatable parameters in inflated state and inflatable underbalanced technology of injection valve of frozen rubber valve were optimized. Through the field test of underbalanced drilling, drilling speed was increased in non-target and target reservoirs, Layer protection and discovery have achieved remarkable results, further verifying the real productivity of reservoirs in the northern foreland belt and the southern slope belt, and providing an effective way to improve the exploration and development effect of tight sandstone gas reservoirs.