摘要
为了提高高温深井控压钻进时的环空压力剖面计算精度,实现井底压力精细控制,基于水力学、传热学和流变学基本理论,采用黏温特性室内试验、Drillbench商业软件对比、井下环空压力实测数据验证等方法,建立了高温深井控压钻井精细流动模型。该模型充分考虑了环空温度分布、钻井液黏温特性、高温高压下的钻井液密度等因素,实现了压力温度耦合计算。现场应用表明,该模型的计算精度相比普通模型有了一定提高,绝对误差仅为0.2MPa左右,为高温深井压力敏感储层的井下压力计算和环空压力控制提供了更好的技术手段。
In order to improve the calculation accuracy of annulus pressure profile and realize fine cal- culation of bottomhole pressure, a fine MPD flow model was established for high temperature deep wells based on comprehensive research methods including hydraulics, heat transfer theory, rheological basic theo- ry,viscosity-temperature characteristics, lab experiment, comparison with Drillbench software, verification by measured downhole annular pressure, etc. Factors such as annulus temperature distribution, drilling flu- id viscosity-temperature characteristics, drilling fluid density characteristic under high temperature and high pressure were fully considered. This model realized the coupling calculation of pressure and temperature. Field application showed the accuracy of this model was higher than that of other models, with an absolute error of merely about 0.2 MPa. The model provided a better means of pressure calculation and annulus pressure control for pressure sensitive reservoirs in high temperature deep wells.
出处
《石油钻探技术》
CAS
CSCD
北大核心
2013年第1期8-13,共6页
Petroleum Drilling Techniques
基金
国家科技重大专项"中东富油气区复杂地层井筒关键技术"(编号:2011ZX05031-004)部分内容
关键词
深井钻井
控压钻井
流动模型
井底压力
黏温曲线
钻井液密度
deep well drilling
managed pressure drilling
flow model
bottomhole pressure
viscosity temperature curve
drilling fluid density
