海洋深水工程师法压井计算模型

CALCULATION MODEL STUDY OF DEEPWATER ENGINEER'S KILLING METHOD

随着国家对油气资源需求的不断增长,勘探开发面临的形势更趋复杂,迫切需要向深海(水深超过1000m)油气资源勘探开发方向发展。由于安全钻井液密度窗口狭窄、泥线处的高压低温环境、节流管线中循环压力损失很大等特点,深水工程师法压井计算与陆地差异较大。为此,结合深水井控过程中特殊的地层条件和长阻流管线的特点,在考虑了节流管线摩阻、气体的压缩系数及温度等参数变化对套压、立管压力的影响的基础上,建立了深水工程师法的压井参数(包括立管压力、套压、最大套压等)计算模型,开展了实例计算,对现场压井施工具有指导意义。

With the country's growing demand to oil and gas resources, the situation of exploration becomes more complex. Oil and gas exploration of deepwater (deeper than 1000m) is needed urgently. Due to narrow window of security drilling fluid density, environment of mud line at low temperatures and high-pressure, and the great circulating pressure loss of choke line, calculation results of deepwater engineer's killing method were quite different to the land. According to the mentioned above, combined the special formation conditions and the features of long master choke lines and considered the change of standpipe pressure and casing pressure caused by choke line friction, gas compressibility factor and the temperature, the computing model of killing parameters of deepwater engineer's method (including standpipe pressure, casing pressure, the maximum casing pressure etc.) was established, and the example calculation was carried out, which was instructive to well killing on site.