利用声波和补偿中子测井组合定量评价致密砂岩储层含气性——以鄂尔多斯盆地东部气田为例  

Quantitative Evaluation of Gas-bearing Property in Tight Sandstone Reservoir Using Acoustic and Neutron Logging:A Case Study of the Gas-field in Eastern Ordos Basin

作　　者：张鹏 ZHANG Peng

机构地区：[1]石油长庆油田分公司第一采气厂 [2]石油长庆油田分公司千口气井评价挖潜工程项目组

出　　处：《国外测井技术》2020年第3期36-39,I0001,共5页World Well Logging Technology

摘　　要：准确计算含气饱和度是致密砂岩气层测井识别和和定量评价的难题,鄂尔多斯盆地东部致密砂岩气层储集空间小、渗透性能差、孔隙结构复杂、流体识别难度大、储层含气性定量评价困难,基于电阻率测井的常规计算模型适用性较差,而由于天然气含氢指数较低和声波时差较高的现象在测井曲线上表现出的独特性质能够成果克服这一难题,因此,本文以盆地东部研究区二叠系致密砂岩储层为研究对象,在粘土矿物成分分析的基础上,通过定量计算粘土含量和孔隙度,利用声波时差和补偿中子测井组合评价了致密砂岩储层的含气性,并与密闭取心资料和试气成果对比验证,该方法取得了较好的应用效果。It is a big problem to calculate gas saturation accurately in the logging identification and quantitative evaluation of tight sand gas reservoir.The tight sandstone gas reservoirs of the eastern Ordos Basin have little space,poor permeability,complex pore structure,and it is difficult for fluid identification and quantitative evaluation of gas-bearing capacity.The conventional calculation model based on resistivity logging is not suitable,but the unique characteristics of the logging curve due to the low hydrogen index and the high acoustic transit time difference of natural gas can overcome this problem.Taking the Permian reservoir of the Eastern Ordos Basin as the research objects,based on the analysis of clay mineral composition and the quantitative calculation of clay content and porosity,the gas-bearing property of tight sandstone reservoir is evaluated by using the acoustic transit time and compensated neutron non-electrical logging well data.Compared with the actual processing data,sealed coring data and gas test results,the method has achieved good application effect.

关 键 词：致密砂岩 粘土含量 声波时差 补偿中子 含气性评价 

分 类 号：P61[天文地球—矿床学]