存在直线断层线性页岩油压裂井试井模型  

Well test model of fractured well in linear shale oil reservoir with straight-line fault

作　　者：马晴伟 MA Qingwei(Exploration and Development Research of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China)

机构地区：[1]中国石化江苏油田分公司勘探开发研究院,江苏扬州225009

出　　处：《复杂油气藏》2025年第1期24-30,共7页Complex Hydrocarbon Reservoirs

基　　金：中国石化江苏油田分公司科技项目“苏北盆地页岩油有效开发基础研究”(JS21023);中国石化江苏油田分公司科技项目“中高渗低采收率油藏剩余油赋存状态及提高采收率技术研究”(JS24014)。

摘　　要：针对线性页岩油藏在长期的地质构造运动过程中产生部分连通断层,为了能准确评价该模型压力传播规律,建立能准确描述该物理模型的数学模型显得尤为重要。因此,本次研究建立了考虑断层流通的线性复合无限导流压裂井数学模型,求解模型并耦合裂缝导流能力函数得到该模型的有限导流压裂井模型解。基于曲线形态和参数敏感性分析结果得到以下结论:该特征曲线大体上分为裂缝双线性流、线性流、径向流、断层窜流和晚期线性流5个特征阶段,断层导流能力、裂缝导流能力和裂缝长度等参数对特征曲线有明显的影响。所得的结果有利于提高对存在直线断层线性油藏压裂井渗流规律的认识。In response to the long-term geological and structural movement process of linear shale reservoirs,which generates partially connected fault,it is particularly important to establish a mathematical model that can accurately describe the physical model in order to accurately evaluate the pressure propagation patterns of this model.Therefore,this study establishes a linear composite infinite conductivity fracture well mathematical model considering fault circulation,solving the model,and coupling the fracture inflow capacity function to obtain a finite conductivity fracture well model solution of the model.Based on the analysis of curve morphology and parameter sensitivity,the following conclusions are drawn:The characteristic curve is generally divided into five distinct stages:double linear flow through fractures,linear flow,radial flow,inter-layer flow through faults,and late linear flow.The parameters such as fault flow capacity,fracture flow capacity,and fracture length significantly affect the characteristic curve.The results obtained are beneficial for enhancing the understanding of the seepage flow patterns in linear shale oil reservoirs with straight-line faults.

关 键 词：部分连通断层 压裂井 断层导流能力 裂缝导流能力 线性复合油藏 

分 类 号：TE357[石油与天然气工程—油气田开发工程]