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本文综合考虑缝中温度场与压裂液的粘度、滤失性和流体的流动以及裂缝大小等的相互影响,针对使用牛顿型和非牛顿型压裂液、悬浮式和沉降式支撑剂压裂,建立了包括温度场、流速场和压力场的一整套预测裂缝几何尺寸的数值模型和方法,给出了三口井的实例对比计算数据和曲线,比较了未考虑温度变化时本文与美国BJ公司和哈里伯顿公司的计算结果。分析表明,本文提供的数值计算方法可用于现场设计计算,并且具有较为实际的模拟压裂液滤失和温度变化,以及缝中压力变化的优越性。
In this paper, we consider the interaction between the temperature field in the fracture and the viscosity of the fracturing fluid, fluid loss and fluid flow and the size of the fractures. Considering the use of Newtonian and non-Newtonian fracturing fluids, the fractures of suspended and subsidence proppants , A set of numerical models and methods for predicting crack geometrical dimensions including temperature field, velocity field and pressure field are established. The comparison data and curves of three wells are given. When the temperature variation is not considered, And Halliburton’s calculations. The analysis shows that the numerical method provided in this paper can be used in field design and calculation, and has more practical simulation of fluid loss and temperature changes of fracturing fluid, as well as the superiority of pressure changes in the fracture.