基于流动单元划分的砂砾岩储层渗透率校正方法  

Permeability Correction Method of Sandy Conglomerate Reservoir Based on Flow Unit Division

作　　者：毛晨飞 高衍武 肖华 陈国军[2] 刘海明 吴伟 高明[2] MAO Chenfei;GAO Yanwu;XIAO Hua;CHEN Guojun;LIU Haiming;WU Wei;GAO Ming(Geological Research Institute,China National Logging Corporation,Xi’an,Shaanxi 710077,China;Exploration and Development Research Institute,PetroChina Xinjiang Oilfield Company,Urumqi,Xinjiang 836413,China;Training Center,China National Logging Corporation,Xi’an,Shaanxi 710054,China)

机构地区：[1]中国石油集团测井有限公司地质研究院,陕西西安710077 [2]中国石油新疆油田公司勘探开发研究院,新疆乌鲁木齐836413 [3]中国石油集团测井有限公司培训中心,陕西西安710054

出　　处：《测井技术》2023年第4期486-494,共9页Well Logging Technology

基　　金：中国石油天然气集团有限公司重大专项“测井采集处理解释关键技术研究——测井数字岩石技术研究”(2021DJ4003);中国石油天然气集团有限公司攻关性应用性科技专项“超深层碎屑岩油气规模增储上产与勘探开发技术研究”(2023ZZ14);中国石油集团测井有限公司科技项目“超深层测井系列适应性与处理解释研究”(CPL2021-B03)。

摘　　要：砂砾岩储层中,砾、砂、泥组分含量变化快,孔隙喉道结构复杂,渗透率计算误差较大。为了提高该类储层的渗透率计算精度,在渗透率主控因素分析的基础上,明确孔隙结构和黏土含量是准噶尔盆地滴南凸起乌尔禾组渗透率的重要影响因素。基于流动单元划分,分类建立渗透率计算模型,消除孔隙结构对渗透率的影响;根据流体渗流理论和岩石毛细管物理模型,推导得到考虑孔隙中黏土含量影响的渗透率模型,并进一步采取测井曲线组合法建立孔隙中黏土含量计算模型,从而得到黏土含量校正后的最终渗透率模型。结果表明,综合流动单元划分及黏土含量校正的渗透率模型计算精度更高,相对误差更小,与实验数据吻合度更高。该模型能有效提高砂砾岩储层渗透率的计算精度。In sandy conglomerate reservoir,the contents of gravel,sand and shale components change rapidly,the pore throat structure is complex,and the calculation error of permeability is big.In order to improve the permeability calculation accuracy of this kind of reservoir,based on the analysis of the main controlling factors of permeability,it’s clarified that pore structure and clay content are important influencing factors of permeability in the Wuerhe formation in Dinan salient,Junggar basin.The permeability calculation model is established by the flow unit division to eliminate the influence of pore structure on permeability.According to the fluid seepage theory and the physical model of rock capillary,the permeability model considering the influence of clay in pores is deduced.Then the calculation model of clay content in pores is established by logging curve combination method,so as to obtain the final permeability model after clay content correction.The results show that the permeability model with comprehensive flow unit division and clay content correction has higher calculation accuracy,smaller relative error and better agreement with experimental data.This model can effectively improve the calculation accuracy of permeability of sand-conglomerate reservoirs.

关 键 词：测井评价 砂砾岩 流动单元 孔隙结构 黏土含量 渗透率校正 准噶尔盆地滴南凸起 

分 类 号：P631.84[天文地球—地质矿产勘探]