| 东胜气田井壁稳定技术研究 |
| 投稿时间：2017-07-27 修订日期：2017-10-28 点此下载全文 |
| 引用本文：王群.东胜气田井壁稳定技术研究[J].钻探工程,2018,45(1):39-43.WANG Qun. Research on Borehole Stability Technology in Dongsheng Gas Field[J]. Drilling Engineering, 2018,45(1):39-43. |
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| 中文摘要:随着世界石油工业的不断发展，勘探开发领域的持续拓宽，勘探开发方向逐渐转变为“攻深找盲”，高风险井、深井、超深井占比的增加，对钻井技术和钻井液技术提出了更高的要求。特别是自2014年起东胜气田的钻井环境有了显著变化，钻井液不落地技术的应用推广引起大量旧钻井液经过简单处理之后又参与循环，钻井液中大量亚微离子参与循环导致钻井液维护、处理困难。还有部分老区块加密布井，特别是在已经开采的老区块布井施工，由于前期钻井过程中钻井液渗透作用使地层岩石的力学强度降低和岩石的应力分布改变，使原有地质资料无法精确预测地层压力，井壁失稳问题更加凸显。因此钻井施工也需要向科学管理、精细管理靠拢，更需要通过模拟分析，精确钻井液性能范围来稳定井壁。本文对近两年东胜气田水平井施工中出现的井壁失稳现象进行了探讨，结合钻井液与工程两方面措施形成一套井壁稳定技术，来应对日益复杂的井内情况。 |
| 中文关键词:东胜气田 井壁失稳 因漏致塌 钻井液 工程防塌 |
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| Research on Borehole Stability Technology in Dongsheng Gas Field |
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| Abstract:With the continuous development of oil industry and the continuous widening of the exploration and development field in the world, the direction of exploration and development has gradually transformed to“exploring deep deposit”. The increase of the proportion of high-risk wells, deep wells and ultra-deep wells has put forward higher requirements for drilling technology and drilling fluid technology. Especially since 2014, the drilling environment of Dongsheng gas field changed significantly, due to the application and extension of drilling fluid recovery technology, a lot of used drilling fluid is involved in the circulation after simple treatment, large amount of submicron in such drilling fluid makes the maintenance and treatment difficult. For infill wells construction in old blocks, especially the exploited blocks, the permeability of drilling fluid during the pre-drilling process reduced the mechanical strength of strata rocks and changed the stress distribution of rocks, which makes the formation pressure can not be accurately predicted on the basis of the original geological data, the borehole instability problem is more prominent. Therefore, scientific management and fine management are also necessary for drilling construction, and simulation analysis is more necessary to accurately determine the performance range of drilling fluid for wall stability. The paper discusses the borehole instability of Dongsheng gas field in recent 2 years, a set of borehole stability technology is formed by the combination of drilling fluid and engineering measures to deal with the increasingly complicated borehole conditions. |
| keywords:Dongsheng gas field borehole wall instability caused by leakage drilling fluid collapse prevention for engineering |
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