充气泡沫水泥浆固井技术在焦页9井的应用

发布时间：2018-01-02 05:27

本文关键词：充气泡沫水泥浆固井技术在焦页9井的应用　出处：《断块油气田》2016年06期 　论文类型：期刊论文

【摘要】：针对涪陵区块外围探井固井过程中普遍面临的水泥失返、固井胶结差等问题,对焦页9侧钻井准244.50 mm技术套管固井难点进行了分析。采用低密度泡沫水泥浆体系,利用高压气体混合发泡方法,在掺有发泡剂、稳泡剂的嘉华G级水泥浆中直接产生泡沫,通过合理设计注气量,形成了充气泡沫水泥浆固井工艺技术。该项技术在焦页9侧钻井固井中得以应用,一次性注水泥浆成功实现全井封固,泡沫水泥浆裸眼封固段长达1 200 m,井下平均密度1.55 g/cm3,固井胶结质量明显优于漂珠水泥体系。实践结果表明,充气泡沫水泥近平衡固井技术,对解决固井恶性漏失、防止浅层气窜和提高固井顶替效率等具有好的效果。
[Abstract]:According to the Fuling block peripheral wells generally faced in the process of cementing cement lost, cementing cement poor, focusing on page 9 side drilling 244.50 mm casing cementing difficulties were analyzed. Using low density foam cement slurry system, using high-pressure gas mixed foaming method, a foaming agent in addition, foam directly produce foam stabilizing agent the Jiahua class G cement slurry, through the reasonable design of gas injection, the formation of air foam cement slurry cementing technology. The application of this technology in the coke 9 side drilling cementing, one-time cement injection successfully in the well cementing of foam cement slurry, borehole cementing period of up to 1200 m, the average density 1.55 g/cm3, the cement bond quality is significantly better than the cenosphere cement system. The experimental results indicate that the aerated foam cement cementing technology to solve the near equilibrium, cementing leakage, prevent shallow gas channeling and improve cementing displacement efficiency It has a good effect.

【作者单位】：中国石化石油工程技术研究院;
【基金】：国家自然科学基金项目“酸性气体对固井水泥石的腐蚀机理及控制机制”(51374218)
【分类号】：TE256.6
【正文快照】： 涪陵页岩气田处于典型的喀斯特地貌区,地层承压能力低,固井中极易发生井漏,固井防漏一直是制约气田发展的技术瓶颈[1￣2]。如焦页5￣8井,技术套管固井中水泥难以一次性返至井口,需要环空挤水泥补救作业,耗费时间且固井质量难以保证,影响气田的产量和寿命。泡沫水泥浆体系以其

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