爆燃压裂油井产能电模拟实验评价  

Evaluation of Exploding Fracture Wells Productivity Using Electric Analog Experiment

作　　者：陈德春[1,2] 吴晓东[1] 潘志华[2] 李海波[2] 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石油大学(华东)石油工程学院,山东青岛266555

出　　处：《石油钻探技术》2011年第6期73-77,共5页Petroleum Drilling Techniques

基　　金：中国石油化工股份有限公司项目"水力裂缝层内爆炸提高采收率技术基础研究"(编号:P03051)资助

摘　　要：为分析爆燃压裂增产机理及爆燃压裂对油藏渗流场和油井产能的影响,根据电流场和渗流场的相似原理,设计了爆燃压裂油井产能电模拟实验方案,通过实验研究了爆燃裂缝参数对油藏渗流场和油井产能的影响,并与油井产能数学模型的计算结果进行了对比分析。结果表明:越接近爆燃裂缝线性单向流越明显,说明爆燃裂缝改变了地层流体在地层中的渗流方式;爆燃裂缝前端等压线发生了明显弯曲和集中,证明裂缝前端有汇流存在;电流比随爆燃裂缝长度和裂缝数量的增加而增大,但增大幅度逐渐变小,最优爆燃裂缝数量为5条;保角变换产能数学模型计算结果与实验结果的平均相对误差为4.95%,节点系统分析产能数学模型计算结果与实验结果的平均相对误差为12.02%,证明保角变换产能数学模型和节点系统分析产能数学模型具有较好的精度和工程适用性。In order to analyze the stimulation principle as well as the effects to reservoir fluid flow field and well productivity of exploding fracturing,electric analog experiments of exploding fracture wells productivity are designed based on the similarity theory between electric current field and fluid flow field in porous media.Exploding fractures parameters＇ effects on reservoir fluid flow field and well productivity are studied by experiments,meanwhile,experimental results are compared with mathematical model.Results show that the nearer the exploding,the more significant the linear flow.This indicates exploding fracture changes fluid flow mode.Flow convergence in the fracture front end is proved by obvious isothermal contour bent and centralization.Electric current ratio increases with a decreasing gradient as exploding fractures length and number increase,and the optimum exploding fractures number is 5.The average relative productivity error between nodal system analysis and experimental result is 4.95%,while the error is 12.02% between conformal transformation and experimental result.This proves good accuracy and engineering suitability of conformal transformation productivity model and nodal system productivity model.

关 键 词：爆燃压裂 油井产能 电模拟 裂缝 数学模型 

分 类 号：TE357.3[石油与天然气工程—油气田开发工程]