低渗透油藏垂直裂缝井产能评价新方法  

A new method of estimating productivity of vertically fractured wells in low permeability oil reservoirs

作　　者：黄勇[1] 李春兰[2] 程林松[2] 黄世军[2] 

机构地区：[1]中联煤层气国家工程研究中心有限责任公司,北京100095 [2]中国石油大学(北京)石油天然气工程学院,北京100249

出　　处：《油气地质与采收率》2010年第1期99-101,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家"973"项目"高丰度煤层气富集机制及提高开采效率基础研究"第六课题"煤层气开发井间干扰机理与开发方式优选"

摘　　要：为了更加准确预测低渗透油藏垂直裂缝井产能,研究不同渗透率级别下的垂直裂缝井产能,基于垂直裂缝井渗流特征,应用位势理论,推导了垂直裂缝井产能公式。在考虑垂直裂缝井与直井泄油半径关系的基础上,结合新的产能公式改进了压裂直井增产倍比传统计算方法,使垂直裂缝井增产倍比从理论上更加合理。对不同渗透率级别储层中的垂直裂缝井,分别应用新方法和其他学者的方法进行对比,从泄油半径、增产倍比、无因次产能随渗透率的变化结果可以看出,产能评价新方法更符合低渗透油藏实际情况。Based on the percolation feature of the vertically fractured wells.a new productivity formula about the vertically fractured well was derived with the potential theory.Taking the relationship of the drainage radius between the vertical wells and the vertical-ly fractured well into account.an improved method was used to calculate the rate of productivity index.The value will be more accurate than that by the traditional method theoretically.According to the analysis on applicability of the vertically fractured wells in different permeability-level reservoirs,the result of drainage radius,stimulation ratio and dimensionless productivity indicates that the improved method is more applicable in low permeability oil reservoirs.

关 键 词：垂直裂缝井 产能 泄油半径 低渗透油藏 渗透率级别 增产倍比 

分 类 号：TE348[石油与天然气工程—油气田开发工程]