摘要
低渗透气藏生产数据连续性较差,传统的递减阶段整体分析方法,不论Arps方法还是修正的衰减递减分析方法,预测效果都较差。通过预测值与实际生产数据差值所建立样本空间的标准偏差分析入手,发现对于低渗透气藏呈现多段弱台阶分布的实际数据而言,分段递减分析效果远好于整体递减分析,且易于在Excel中实现,使用简便、准确、高效。对于产量波动大,生产数据离散分布的低渗透和特低渗透油气藏,推荐使用该方法进行递减动态分析。
Distribution of production data tends to be sparse in low permeability gas reservoirs.The traditional production decline analyses,no matter Arps or modified attenuation decline analysis,are all poor in forecast effect.This paper analyzes the standard deviation of the sample space set up by differences between the predicted and actual production data,finding out that in view of actual data of multi-section weak step distribution in low permeability gas reservoir,multi-section decline analysis results are far better than overall decline analysis,which is easy to attain in Excel,so being accurate and efficient.For low permeability and super-low permeability oil-gas reservoirs with sparse distribution of production data,this method is recommended for production decline dynamic analysis.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2010年第6期614-616,共3页
Xinjiang Petroleum Geology
基金
国家科技支撑课题项目(2007BAB17B05)
关键词
低渗透油气藏
递减
分段
标准偏差
low permeability reservoir
decline
section
standard deviation
