特种油气藏2017，Vol.24Issue(4)：73-77,5.DOI:10.3969/j.issn.1006-6535.2017.04.013
致密油藏水平井分段多簇压裂产能预测方法
A Method to Predict Productivity of Multi-stage Multi-cluster Fractured Horizontal Wells in Tight Oil Reservoirs
摘要
Abstract
As a complex multi-cluster fracture network is formed after multi-stage fracturing of horizontal wells in tight oil reservoirs,the multi-stage multi-cluster fracture network is equivalent to a high permeability zone and the formula between effective permeability and height of the high permeability zone is derived,based on equivalent per-colation theory and Warren-Root model,so as to accurately characterize fracture network and predict productivity. Based on this result,complex potential theory and theory of potential superimposition,a model is built to predict transient productivity of multi-stage multi-cluster fractured horizontal wells in tight oil reservoirs considering inter-fracture interference using analytical method. The research shows that the daily production of horizontal wells de-clines in"L"shape and production declines quickly in initial period and is stable in later period. Results of field calculation are very close to actual production data,with only a little discrepancy. Larger permeability in high per-meability zone and larger length results in larger productivity of fractured-horizontal wells. However,the parameter has an optimum value as being limited by economics and technology. The productivity prediction method provides guidance for the development of tight oil reservoirs.关键词
致密油藏/水平井/分段多簇压裂/等效高渗透带/产能预测Key words
tight oil reservoir/horizontal well/multi-stage multi-cluster fracturing/equivalent high permeability zone/productivity prediction分类
能源科技引用本文复制引用
杨兆中,陈倩,李小刚..致密油藏水平井分段多簇压裂产能预测方法[J].特种油气藏,2017,24(4):73-77,5.基金项目
国家科技重大专项"碎屑岩储层水平井压裂优化设计软件开发"(2016ZX05002-005-011) （2016ZX05002-005-011）
