测井技术2024，Vol.48Issue(3)：355-362,8.DOI:10.16489/j.issn.1004-1338.2024.03.010
大庆油田X7地区低孔渗储层核磁共振测井可变T2截止值确定方法
Determination Method of Variable T2 Cutoff Value in NMR Logging of Low Permeability Reservoir in Daqing Oilfield X7 Area
摘要
Abstract
T2 cutoff value is a key parameter for calculating bound fluid porosity, mobile fluid porosity and permeability in NMR logging. On the basis of existing core mercury injection data and NMR logging data, a method for continuously calculating T2 cutoff value of NMR logging in low porosity and permeability reservoir is proposed. Firstly, T2 spectrum of nuclear magnetic logging at the corresponding depth of the core is replaced by T2 spectrum of the nuclear magnetic experiment. The permeability contribution in the mercury injection data of the core is used to determine the mercury input saturation corresponding to the bound water, and the remaining mercury saturation at this time is the bound water saturation. The combined with T2 spectrum, the T2 cutoff value of the core is obtained by interpolation algorithm. Finally the distribution of T2 cutoff values in the T2 spectrum of multiple cores is analyzed, and a method for continuously calculating the variable T2 cutoff values is established according to the T2 spectrum morphology. This method is applied to the continuous T2 cutoff value calculation of NMR logging in X7 area, and the calculated T2 cutoff value is used to calculate reservoir parameters such as porosity and permeability, which significantly improves the calculation accuracy of reservoir parameters.关键词
核磁共振测井/可变T2截止值/低孔隙度低渗透率储层/束缚水孔隙度/大庆油田Key words
nuclear magnetic resonance logging/variable T2 cutoff value/low porosity and permeability reservoir/bound water porosity/Daqing oilfield分类
天文与地球科学引用本文复制引用
李鹏举,陈冲航,徐若谷,刘硕,沈忠山,付艳..大庆油田X7地区低孔渗储层核磁共振测井可变T2截止值确定方法[J].测井技术,2024,48(3):355-362,8.基金项目
中国科学院声学所声场声信息国家重点实验室开放课题"老化油超声破乳的声学机理研究"(SKLA202412) （SKLA202412）
