土库曼那2井复杂巨厚盐膏层固井技术

发布时间：2018-01-29 06:14

本文关键词： 土库曼斯坦阿姆河正注反挤尾管固井　出处：《钻采工艺》2017年06期 　论文类型：期刊论文

【摘要】：那2井是中国石油在阿姆河地区钻探的井深最深、盐膏层最厚、井温最高的一口探井,其盐膏层段地层压力高且十分敏感,钻井液密度高于2.4 g/cm3发生井漏,低于2.35 g/cm3发生盐水溢流。文章通过对那2井錘311.2 mm井眼钻进情况及固井难点的分析后,选择了满足强度要求的錘265.13 mm厚壁套管,细化通井措施,确保了在窄环空间隙条件下一次成功下入厚壁套管;同时采用了尾管固井加正注反挤固井工艺技术及欠饱和的盐水水泥浆体系,有效地封固了复杂盐膏层段,满足了后续产层钻进的要求。那2井固井的成功对类似复杂井固井施工提供了较好的借鉴。
[Abstract]:Well No. 2 is a exploration well with the deepest depth, the thickest salt layer and the highest well temperature, which is drilled by CNPC in the Amu River area. The formation pressure of the salt and paste zone is high and sensitive. The drilling fluid density is higher than 2.4 g / cm ~ 3. Brine overflow occurs below 2.35 g / cm ~ 3. This paper analyzes the drilling conditions and cementing difficulties of Hammer 311.2 mm well in 2 wells. The hammer 265.13 mm thick wall casing which meets the strength requirement is selected to refine the through well measures to ensure the successful entry of the thick wall casing under the condition of narrow annulus gap. At the same time, the technology of tailpipe cementing plus positive injection and reverse extrusion cementing and the undersaturated salt water slurry system are used to effectively seal the complex salt gypsum formation. The success of cementing in well 2 provides a good reference for cementing operation of similar complex wells.
【作者单位】：中国石油川庆钻探国际工程公司;
【基金】：国家“十二五”重大专项“阿姆河右岸中区天然气开发示范工程”(编号:2011ZX05059)
【分类号】：TE256
【正文快照】： 一、那2井盐膏层段井眼情况那嘎拉齐2井(简称那2井)是土库曼地质康采恩在阿姆河左岸那嘎拉奇构造部署的一口风险探井,设计井深5 500 m(錘215.9 mm井眼),是川庆钻探公司在阿姆河地区承钻的井深最深的一口井,该井盐膏层埋藏深(5 200 m)、厚度达1 400 m,地层压力系数高(2.25),井

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