大牛地气田水平井钻完井工艺技术  

Drilling and completion technology for horizontal wells in the Daniudi gas field

作　　者：常兴浩 秦玉英 王锦昌 

机构地区：[1]中石化华北分公司,河南郑州450006

出　　处：《特种油气藏》2013年第2期130-133,157-158,共4页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"大牛地气田特殊结构井钻完井工艺技术研究"(2008ZX05045-003-3)部分研究成果

摘　　要：大牛地气田尝试水平井技术开发初期,钻井指标低,成本高,不能满足低成本高效开发需要。分析前期钻井指标低的主要原因是井身结构不合理、井眼尺寸大、井眼轨道造斜率偏大、斜井段易出现煤层垮塌等复杂情况。对此进行了对策分析、方案优化,形成了优快钻进系列技术:152.4 mm水平段井眼井身结构技术、三段制单增轨道设计技术、二开上部直井段复合钻进技术、煤层安全钻进技术。现场应用效果表明,大大提高了大牛地气田的水平井钻井指标,其中钻井周期由139 d缩短至61 d,机械钻速由3.02 m/h提高到至6.75 m/h,取得了良好的应用效果。The attempt of horizontal well technology in the Daniudi gas field has presented low drilling index,high cost,and can not meet the requirement of low cost and high efficiency development.The reasons of low drilling index are analyzed to be irrational well structure,large hole size,high build-up rate and coalbed collapse in angle buildup interval.The countermeasures are analyzed and optimized,thus formed a series of techniques,including 152.4 mm horizontal hole structure technique,three-section single build-up rate trajectory design technique,combined drilling techniques for the vertical interval in the upper part of the second spud-in section,and coal seam safe drilling technique.Field application shows that the drilling index of horizontal drilling has been greatly improved in the Daniudi gas field,with drilling cycle shortened from 139 d to 61 d,ROP improved from 3.02 m/h to 6.75 m/h,thus obtained good application result.

关 键 词：小井眼 复合钻具 煤层钻进 优快钻井 水平井 大牛地气田 

分 类 号：TE243[石油与天然气工程—油气井工程]