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压力敏感性储层由于压井液安全密度窗口窄,喷交替现象,很难有效建立井筒内压力的静、动态平衡。压力敏感性储层发生溢流或漏失时,在未准确测得地层静压的情况下,施工现场很难精确计算出适合的压井液密度,从而导致压井时间长,浪费大量人力、物力,甚至出现更复杂的情况。国外一般采用先堵后压的思路来解决压力敏感性储层溢、漏交替复杂问题,但效果不佳。目前我们亟待需要一套适用于钻修井施工现场解决压力敏感性储层压井技术的方法。本文针对塔河油田压力敏感性储层的特点,研究非常规的井控技术,简单而有效的解决压力敏感性地层压井困难的问题,规避复杂情况的出现,提高压井成功率及缩短压井周期。
Pressure-sensitive reservoirs are difficult to effectively establish the static and dynamic balance of pressure in the wellbore due to the narrowing of the density of kill fluid and the spurting alternation phenomenon. When pressure-sensitive reservoirs overflow or leak, it is difficult to accurately calculate the suitable kill fluid density at the construction site without accurate measurement of the formation static pressure, resulting in long kill time and wasting a lot of manpower and material resources , Even more complex situation. Foreign countries generally use the idea of first plug after pressure to solve the pressure-sensitive reservoir overflow, leakage alternates complex problems, but the effect is not good. At present, there is an urgent need for a set of methods suitable for drilling pressure and sensitive well killing technologies at drilling and construction sites. In this paper, according to the characteristics of pressure-sensitive reservoirs in Tahe Oilfield, unconventional well control technology is studied. The problems of pressure-sensitive formation well killing are solved simply and effectively, and the emergence of complicated situations is improved. Well cycle.