储层-裂缝组合单元在水力压裂井产能模拟中的应用  被引量:2

Application of reservoir-fracture composed element to deliverability simulation for hydraulic fracturing well

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作  者:孙峰[1] 薛世峰[2] 仝兴华[2] 

机构地区:[1]中国石油大学地球资源与信息学院,山东东营257061 [2]中国石油大学储运与建筑工程学院,山东东营257061

出  处:《中国石油大学学报(自然科学版)》2010年第3期67-71,共5页Journal of China University of Petroleum(Edition of Natural Science)

基  金:国家科技重大专项课题(2008ZX05031-002-003-001)

摘  要:采用储层-裂缝组合单元模拟压裂改造后的储层、裂缝力学型态,推导相关有限元公式并进行压裂井产能模拟分析。这种方法的实质是将裂缝的质量、刚度矩阵变换叠加到储层整体相应方程矩阵中,以更精确反映裂缝开发动态参数的影响。计算结果表明:采用储层-裂缝组合单元有效解决了储层-裂缝网格尺度匹配的问题;反力算法避免了在高导流裂缝局部求解压力梯度产生的计算误差,提高了运算速度和求解压裂井产能的精度,为水力压裂井生产动态模拟和设计方案优化提供了新的处理方法。The mechanics characteristics of reservoir and fracture after hydraulic fracturing were simulated by using reservoir-fracture composed element.Based on finite element method,a composed reservoir-fracture element model was established to analyze the fractured well deliverability.The mass and the stiffness matrixes of the fracture element were transformed to the whole system of coordinates,which can reflect the effect of production formance on productivity.The results show that the problem of reservoir-fracture mesh size matching was solved by reservoir-fracture composed element.Using the reaction method to compute the production,the computing error of solving pressure gradient in high flow conductivity fracture was avoided,and the operating speed and accuracy of solving fractured well deliverability were improved.This model can contribute to the performance simulation and design optimization of fractured well.

关 键 词:锚杆单元 储层-裂缝组合单元 水力压裂 产能模拟 有限单元法 

分 类 号:TE319[石油与天然气工程—油气田开发工程]

 

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