摘要
将压裂水平井半解析产能预测方法应用于实际油田压裂水平井的产能模拟,与现场的生产数据相对比,计算结果的准确性较高。该方法避免了解析方法和有限差分数值模拟方法的不足,且简单易行,完全可以满足现场应用的要求。利用压裂水平井半解析产能模型,结合我国实际的低渗透油田,对影响压裂水平井产能的几个重要因素进行了分析,并得出了一些有益的结论。结果表明,裂缝井的产量随着裂缝条数、裂缝长度、裂缝高度的增加而增加;当裂缝与水平井夹角成90°时,裂缝井产量随裂缝长度的增加而线性增加,随着夹角的减小,这种增加的趋势变缓;为了获得较高的产量,裂缝与水平井最优夹角应为75°~90°,裂缝高度应至少达到油层厚度的70%;在裂缝总长度一定的情况下,为了避免缝间干扰造成产量损失,压裂时应尽可能使两侧缝长大于中间缝长。
The semi-analytic productivity model of fractured horizontal is used to simulate an actual fractured horizontal well in a low permeability oil reservoirs in China,and the accuracy of the result is satisfactory.This method could avoid the defect of the analysis method and the finite difference numerical simulation method,and easily used in practical production.In addition,by using the semi-analytic productivity model,some factors that influence the productivity of the fractured horizontal well were studied,and some useful conclusions were drawn from the study.The result showed that,as the number,length and height of fractures increase,the production increase;when the angle between the fracture and horizontal well is 90 degree,the increase of the production with the length of the fracture is linear,with the decrease of the degree,the tendency of production increase also flatten out.In order to obtain higher yields,the angle between the fracture and horizontal well should be between 75 to 90 degree,and the height of the fracture should be 70 percent of the reservoir thickness.When the total length of the fracture is certain,reducing the interference among the fracture,the length of the outer fractures should bigger than that among the inner fractures.
出处
《钻采工艺》
CAS
北大核心
2009年第3期41-43,共3页
Drilling & Production Technology
基金
国家863项目(No.2006AA09Z338)"特殊结构井开发油藏工程技术"部分研究成果
中国石油天然气股份公司科技攻关项目"低
特低渗透油气藏有效开发技术研究"(06-02A-02-01)部分研究成果
关键词
压裂水平井
半解析模型
产能
低渗透油藏
fractured horizontal well,semi-analytic model,productivity,low permeability oil reservoirs