吉林油田微泡沫钻井液流变模型的研究
发布时间：2019-03-03 12:50
【摘要】：近年来,许多油田进入了开发后期,出现了枯竭储层,使用普通钻井液常遇漏失和压差卡钻等问题。微泡沫钻井液与常规钻井液相比,具有低密度且独特封堵能力的优势而引起人们的广泛重视。本文结合吉林油田实际情况,通过评价发泡量和半衰期等方法对发泡剂、稳泡剂进行优选,研制出适合微泡沫发挥作用的微泡沫钻井液配方,并对其进行系统的室内评价;在此基础上,给出了微泡沫钻井液的泡沫尺寸范围、稳定性和流变特性的统计学评价结果;通过测量排液量、监测泡沫膨胀速度和剪切压力、剪切速率随时间变化情况对微泡沫钻井液进行稳定性分析。用八种流变模型对微泡沫钻井液的剪切流动特性进行数量描述,对每种模型的应用进行详细的检验。最终建立了考虑温度和剪切速率对微泡沫钻井液粘度影响的新模型,研究结果对微泡沫钻井液体系在现场的应用有很大指导意义。
[Abstract]:In recent years, many oilfields have entered the late stage of development, there have been depleted reservoirs, the use of ordinary drilling fluid often encountered leakage and pressure difference stuck drilling and other problems. Compared with conventional drilling fluid, microfoam drilling fluid has the advantage of low density and unique plugging ability. In this paper, according to the actual situation of Jilin oilfield, the foaming agent and stabilizing agent are optimized by evaluating the foaming capacity and half-life, and the formulation of microfoam drilling fluid suitable for micro-foam is developed and evaluated systematically in laboratory. On this basis, the results of statistical evaluation of foam size, stability and rheological properties of microfoam drilling fluid are given. The stability analysis of microfoam drilling fluid is carried out by measuring the liquid discharge rate, monitoring the foam expansion rate and shear pressure, and analyzing the stability of microfoam drilling fluid with the variation of shear rate with time. The shear flow characteristics of microfoam drilling fluid are described quantitatively by eight rheological models, and the application of each model is examined in detail. Finally, a new model considering the effect of temperature and shear rate on the viscosity of microfoam drilling fluid is established. The results are of great significance to the field application of microfoam drilling fluid system.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE254
本文编号：2433711
[Abstract]:In recent years, many oilfields have entered the late stage of development, there have been depleted reservoirs, the use of ordinary drilling fluid often encountered leakage and pressure difference stuck drilling and other problems. Compared with conventional drilling fluid, microfoam drilling fluid has the advantage of low density and unique plugging ability. In this paper, according to the actual situation of Jilin oilfield, the foaming agent and stabilizing agent are optimized by evaluating the foaming capacity and half-life, and the formulation of microfoam drilling fluid suitable for micro-foam is developed and evaluated systematically in laboratory. On this basis, the results of statistical evaluation of foam size, stability and rheological properties of microfoam drilling fluid are given. The stability analysis of microfoam drilling fluid is carried out by measuring the liquid discharge rate, monitoring the foam expansion rate and shear pressure, and analyzing the stability of microfoam drilling fluid with the variation of shear rate with time. The shear flow characteristics of microfoam drilling fluid are described quantitatively by eight rheological models, and the application of each model is examined in detail. Finally, a new model considering the effect of temperature and shear rate on the viscosity of microfoam drilling fluid is established. The results are of great significance to the field application of microfoam drilling fluid system.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE254
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，本文编号：2433711
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