莺歌海盆地高温高压水平气井井控影响因素

发布时间：2018-04-30 04:33

本文选题：高温高压 + 水平井　；参考：《石油钻采工艺》2016年06期

【摘要】：水平井是提高莺歌海盆地区域气井产能的重要手段,该区域的高温高压特点严重制约着钻井井控安全。结合水平井渗流理论和多相流理论,建立了高温高压水平井井控压井模型,以莺歌海盆地的一口井为例,模拟分析了高温高压水平井井控的特点。模拟分析结果表明:水平段长度越长,渗透率越大,溢流量越大;水平井具有更大的井涌允量和更长的关井时间;钻井液密度在该区域高温高压环境下会减小;相同溢流条件下,高温井的井底压力降低更明显;如果使用油基钻井液,溢出气体会溶解到钻井液中,随着向上运移,气体不断析出并且膨胀,导致泥浆池增量在压井后期突然增大。高温高压水平井的井控分析为莺歌海盆地的高效安全开发提供了技术支持。
[Abstract]:Horizontal well is an important means to improve the productivity of gas wells in Yinggehai Basin. The characteristics of high temperature and high pressure in this area seriously restrict the safety of drilling well control. Combined with horizontal well percolation theory and multiphase flow theory, a control well control model of high temperature and high pressure horizontal well is established. Taking a well in Yinggehai Basin as an example, the characteristics of high temperature and high pressure horizontal well control are simulated and analyzed. The simulation results show that: the longer the horizontal section length, the greater the permeability, the larger the overflow rate, the greater the wellbore tolerance and the longer shut-in time in horizontal wells, and the lower the drilling fluid density is under the conditions of high temperature and high pressure. Under the same overflow conditions, the bottom hole pressure of the high temperature well decreases more significantly; if oil based drilling fluid is used, the overflow gas dissolves into the drilling fluid, and as it moves upward, the gas continues to precipitate and expand. As a result, the mud pool increment increases suddenly at the later stage of well killing. Well control analysis of high temperature and high pressure horizontal wells provides technical support for high efficiency and safety development of Yinggehai Basin.
【作者单位】：中海油研究总院;
【分类号】：TE58

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