基于NMR的砂砾岩储层岩电参数计算方法  

Calculation Method of Rock-Electrical Parameters of Glutenite Reservoirs Based on NMR

作　　者：骆飞飞[1] 谢天寿 钟磊[1] 李国利 王长江 LUO Feifei;XIE Tianshou;ZHONG Lei;LI Guoli;WANG Changjiang(Exploration and Development Research Institute,PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China;Logging Applied Research Institute,China Petroleum Logging CO.LTD.,Xi’an,Shaanxi 710077,China)

机构地区：[1]中国石油新疆油田公司勘探开发研究院,新疆克拉玛依834000 [2]中国石油集团测井有限公司测井应用研究院,陕西西安710077

出　　处：《测井技术》2021年第3期317-323,共7页Well Logging Technology

基　　金：中国石油天然气集团公司重大专项“深层页岩气有效开采关键技术攻关与试验”(2019F-31)。

摘　　要：由于砂砾岩储层岩性复杂、物性差、孔隙结构复杂,导致储层含油饱和度定量计算难度大。从研究区砂砾岩储层物性、岩电、粒度、核磁共振等岩心测试数据入手,系统分析了砂砾岩储层岩石物理性质参数对岩电参数的影响,提出基于孔隙结构的砂砾岩储层岩电参数方法以确定玛湖地区三叠系百口泉组复杂砂砾岩储层饱和度模型。提取岩心测试的核磁共振T_(2)谱特征参数,根据这些特征参数与岩电参数m、n的关系,建立基于孔隙结构的m和n的计算模型,把求取的岩电参数模型应用到饱和度计算中。该方法利用核磁共振测井资料实现了连续深度上的岩电参数m和n的精确计算,进而求得含油饱和度,并在现场实际应用中取得了显著效果。Due to the complex lithology,poor physical properties,and complex pore structure of glutenite reservoirs,it is difficult to quantitatively calculate the oil saturation of the reservoir.Based on the coring test data of the glutenite reservoirs in the study area,such as physical properties,lithology,grain size,and nuclear magnetic field,this paper systematically analyzes the influence of the petrophysical properties of glutenite reservoirs on the lithographic parameters,and puts forward a method of rock-electrical parameters of glutenite reservoir to determine the saturation model of the complex glutenite reservoirs of the Triassic Baikouquan formation in Mahu area.Firstly,the characteristic parameters on the nuclear magnetic resonance T_(2) spectrum of the core test are extracted.Then,according to the relationship between the characteristic parameters and rock-electrical parameters(m,n),the calculation model of m and n based on the pore structure is established.Finally,the rock-electrical parameters model is applied to saturation calculation.This method uses nuclear magnetic resonance logging data to achieve accurate calculation of m and n at continuous depths,then obtain oil saturation.The method has achieved significant results in the field applications.

关 键 词：测井解释 砂砾岩储层 孔隙结构 核磁共振 阿尔奇公式 岩电参数 T 2谱 玛湖地区 

分 类 号：P631.84[天文地球—地质矿产勘探]