摘要
针对砂岩地层发育大量高倾角裂缝及其特征,建立了双孔介质油藏多分支垂直裂缝井产能预测数学模型。对模型进行了数值求解,绘制并分析了裂缝参数对产能动态典型曲线的影响。结果表明:裂缝的分支数、长度、导流能力等都是影响产能预测曲线形态的因素。裂缝分支数越多,即裂缝密度越大,产能越大。裂缝延伸越远,裂缝改善渗流的作用使得产能增加。用所建立的模型对大北X井C1-3层进行产能预测,结果表明该方法真实可靠。
Aiming at high dip-angle fractures developing in sandstones and their characteristics,this paper establishes a mathematical model to predict productivity of multi-branch vertically fractured wells with dual-porosity media.Through the numerical solution for the model,the effects of fracture parameters on typical curve of productivity dynamic are analyzed.Result shows that the branch number,length and flow capability of fracture are the factors influencing productivity-prediction curve.The more branch numbers,the more productivity.By extending,the fracture can improve seepage and then increase productivity.This model has been applied successfully to C1-3 layer in Dabei X well.
出处
《天然气勘探与开发》
2012年第2期35-38,87-88,共4页
Natural Gas Exploration and Development
基金
国家重大专项:高压气藏高效安全开发技术研究(2011zx05015)
关键词
垂直裂缝井
多分支
数学模型
产能
vertically fractured well,multi-branch,mathematical model,productivity
