摘要
针对目前考虑应力敏感的多角度多段裂缝压裂水平井产量模型研究较少,基于摄动理论,结合源函数,建立拉普拉斯空间下求解压裂水平井产量的半解析方法,与成熟数值模拟软件对比验证模型正确性,绘制并分析应力敏感油藏多角度多段压裂水平井压力和产量动态曲线.结果表明:应力敏感油藏压裂水平井流动形态呈现较为明显的裂缝线性流与系统径向流动形态,而其双对数压力及其导数曲线在系统径向流阶段出现上翘;应力敏感效应减弱了缝间干扰作用,体现在不同裂缝条数与裂缝角度对产量的影响上,因此,裂缝条数等参数的优化需要考虑应力敏感,才能得到更合理的结果.
There are few researches on the production prediction model of multi-angle multi-cluster fractured horizontal well.Based on the perturbation theory,this paper establishes a semi-analytical solution of fractured horizontal well in Laplace space integrating with source functions and the pressure and production curve of fractured horizontal well is illustrated and the result analyzed.The results show:there are also two flow regimes including fracturing linear flow and system radial flow in stress sensitive reservoir,but the pressure derivative in stress-sensitive model rise in the radial flow period and the larger the coefficients of stress sensitivity the less the well produce.Stress sensitivity weaken the effect of fracture interference,which is reflected by the effect of fracture numbers and angles in production.
出处
《东北石油大学学报》
CAS
北大核心
2015年第1期87-94,6,共8页
Journal of Northeast Petroleum University
基金
北京市自然科学基金项目(3144033)
关键词
应力敏感
压裂水平井
多角度裂缝
一阶摄动解
拉普拉斯变换
动态产量
stress sensitivity
fractured horizontal well
multi-angled fracture
first order perturbation solution
Laplace transformation
dynamic productivity
