不同体系泥浆中各类型核磁测井适应性研究  

Adaptability of Various Types of NMR Logging in Different Mud Systems

作　　者：王成荣 王俊杰 刘海涛 王邹沛 叶志红 范生刚 刘志敏 WANG Chengrong;WANG Junjie;LIU Haitao;WANG Zoupei;YE Zhihong;FAN Shenggang;LIU Zhimin(Tuha Division,China National Logging Corporation,Hami,Xinjiang 839009,China;Quality and Safety Supervision Center of China National Logging Corporation,Xi′an,Shaanxi 710054,China;Engineering Technology Research Institute,PetroChina Tuha Oilfield Company,Hami,Xinjiang 839009,China)

机构地区：[1]中国石油测井有限公司吐哈分公司,新疆哈密839009 [2]中国石油测井公司质量安全监督中心,陕西西安710054 [3]中国石油吐哈油田公司工程技术研究院,新疆哈密839009

出　　处：《石油管材与仪器》2024年第5期45-52,共8页Petroleum Tubular Goods & Instruments

基　　金：中国石油股份公司重大专项课题“非常规油气甜点测井评价方法与技术研究”(编号:2022KT1604)。

摘　　要：准噶尔盆地吉南凹陷页岩油和低渗油藏井况复杂,勘探开发成本高,为降低成本和满足环境保护要求,钻井采用高矿化度复合盐或油基钻井液。核磁共振测井是能够连续评价储层孔隙结构的有效手段,能提供与岩石骨架无关的核磁总孔隙度、自由流体孔隙度、束缚流体孔隙度,利用孔隙结构估算储层渗透率,有效识别储层流体性质等,在各种类型油气藏勘探开发中得到广泛应用。复合盐泥浆体系泥浆电阻率偏低,核磁共振测井受到限制;油基泥浆体系需要选择适应性核磁共振测量模式。针对复合盐及油基泥浆环境下测井存在的问题和技术需求,分析核磁测井资料品质影响主控因素,通过调整泥浆电阻率、细化测前设计、规范测井流程等多种措施,研究形成了不同类型核磁测井高矿化度复合盐水泥浆及油基泥浆适应性核磁测井类型选择、资料质控指标、泥浆性能控制范围大表及测量模式一系列技术规范,有效提高了各类核磁测井资料质量品质,为准噶尔盆地吉南凹陷页岩油和低渗油藏高效勘探开发提供了技术支持。Due to the complex well conditions of shale oil and low permeability reservoirs in Jinan Sag of Junggar Basin,and the requirements of environment protection and reducing exploration and development costs,high salinity composite salt or oil-based mud is used for drilling.NMR logging is the economic and effective method for continuous evaluation of reservoir pore structure,which can provide nuclear magnetic total porosity,free fluid porosity and irreducible water porosity which are irrelevant to the rock matrix,estimate reservoir permeability,effectively identify reservoir fluid type and etc.,and by present it is widely used in the exploration and development of various types of oil and gas reservoirs.However,the resistivity of compound salt mud is very low,NMR logging is seriously affected.For oil-based mud,it is necessary to carefully select adaptive NMR measurement mode.With the existing difficulty and technical requirement for NMR logging in the environment of compound salt and oil-based mud,this paper analyzed main factors affecting the quality of nuclear magnetic logging data.By adjusting mud resistivity,refining pre job design,standardizing logging process and other measures,a series of technical specifications were formed for selection of NMR logging types,data quality control indicators,mud performance control range tables,and logging mode which adapts to high salinity compound saltwater mud and oil-based mud.The above measures effectively improve the quality of various nuclear magnetic logging data,which can provide technical support for efficient exploration and development of shale oil and low permeability reservoirs in Jinan Sag of Junggar Basin.

关 键 词：吉南凹陷 页岩油 低渗油藏 核磁共振测井 复合盐水 油基 

分 类 号：P631.81[天文地球—地质矿产勘探]