【摘要】 我国高含硫天然气资源丰富，但普遍具有高温高压和高含腐蚀性气体的特点，在开采过程中容易发生气侵、井涌、管材腐蚀等安全隐患，其安全高效钻完井对保障我国高含硫天然气稳产、增产目标具有重要意义。为此，开展了高含硫天然气气井钻井过程的流体相态特征及井筒压力分析，从井筒压力控制的角度，总结分析了近年来国内外高含硫气井在钻井工艺、钻井液技术以及井筒完整性等方面取得的关键技术突破和新进展，并展望了万米特深井钻完井技术的发展趋势。研究结果表明：（1）气体溶解度对井筒流动压力影响较大，高含硫气井钻井过程中必须考虑酸性气体溶解特性对井筒多相流动的影响；（2）精细控压钻井及控压固井技术能精确控制井筒压力在安全密度窗口内，防止钻井过程酸性气体侵入井筒，实现了固井过程压稳不漏；（3）适用于H₂S地层的钻井液技术不但可以稳定井壁、保护储层，还能提高钻井速度；（4）从井下管柱结构优化设计开始，研究完整性风险定量评价方法和低成本防腐技术，可以实现全生命周期井筒完整性，降低高含硫气井钻完井安全生产风险。结论认为，高含硫气井钻完井技术新进展的系统梳理不仅对推动高含硫天然气藏的安全高效开发具有重要的现实意义，同时也为高含硫气藏深井超深井安全高效钻完井技术发展提供了研究思路和攻关方向。更多还原

【Abstract】 There are abundant high-sulfur natural gas resources in China, but they are generally characterized by high temperature, high pressure, and high corrosive gas content, and their production tends to suffer gas invasion, well kick, pipe corrosion and other safety hazards, so the safe and efficient drilling and completion is of great significance to ensure the stable production and production increase of high-sulfur natural gas in China. In this paper, the fluid phase characteristics and wellbore pressure in the drilling process of high-sulfur natural gas well are analyzed. Then, from the perspective of wellbore pressure control, the domestic and foreign new breakthroughs and progresses in the key technologies for drilling, drilling fluid and wellbore integrity of high-sulfur gas wells in recent years are summarized and analyzed. Finally, the development trend of the drilling and completion technologies for 10 000 m deep wells are forecasted. And the following research results are obtained. First, gas solubility has a greater influence on wellbore flow pressure, so in the drilling process of high-sulfur gas well, it is necessary to consider the influence of acid gas solution on the multiphase flow in the wellbore. Second, the precisely managed pressure drilling technology and the managed pressure cementing technology can accurately control the wellbore pressure within the safe density window, so as to prevent acidic gases from entering the wellbore during the drilling, and ensure stable pressure and no leakage during the cementing. Third, the drilling fluid technology suitable for H₂S strata is researched and developed,which can not only ensure wellbore stability and reservoir protection, but also improve the rate of penetration. Fourth, the quantitative assessment method of integrity risk and the low-cost anti-corrosion technology are studied with the optimized design of downhole string structure as the beginning point, which can realize the whole-life-cycle wellbore integrity and reduce the safety hazards in the drilling,completion and production of high-sulfur gas wells. In conclusion, the systematic analysis on the new progresses of high-sulfur gas well drilling and completion technologies is of great realistic significance to the safe and efficient development of high-sulfur natural gas reservoirs, and provides the research ideas and directions for the development of the technologies for the safe and efficient drilling and completion of deep and ultra deep wells in high-sulfur gas reservoirs.更多还原