鄂尔多斯盆地X区铝土岩储层分析  

Analysis of Bauxite Reservoir in X Area of Ordos Basin

作　　者：刘可可 付鑫 荣伟 万吉庆 蔺佳 蒋云鹏 LIU Keke;FU Xin;RONG Wei;WAN Jiqing;LIN Jia;JIANG Yunpeng(Liaohe Branch,CNPC Logging Co.,Ltd.,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油集团测井有限公司辽河分公司,辽宁盘锦124010

出　　处：《西安石油大学学报（自然科学版）》2022年第2期25-31,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：中国石油集团测井有限公司“FILog测井系统”项目(CPL2018-A09)。

摘　　要：为了明确鄂尔多斯盆地X区本溪组的铝土岩是储层还是盖层,以测井、录井、X衍射资料为基础,对铝土岩的成因、岩性、沉积环境、测井响应、储层物性及含气性进行表征。结果表明,铝土岩储层的硬水铝石矿物质量分数在80%以上,发育在封闭的滨浅海环境,可分为过渡期、静水期、强动荡期和弱动荡期4种不同的水动力环境,在强动荡期和弱动荡期下发育的铝土岩具备成为储层的条件。铝土岩储层呈现高伽马、高密度、高中子、低电阻和低声波时差的三高两低特征;发育良好的原生粒间孔隙网络,次生孔隙不发育,平均有效孔隙度0.17,渗透率在100×10^(-3)μm^(2)左右。试气结果表明,铝土岩具有良好的含气性,可作为特殊储层,具备工业开采价值。In order to determine whether the bauxite of Benxi Formation in X area of Ordos Basin is a reservoir or a caprock,the genesis,lithology,sedimentary environment,logging response,reservoir physical properties and gas bearing properties of the bauxite are characterized based on well logging,mud logand X-ray diffraction data.The results show that the mass fraction of diaspore mineral in the bauxite reservoir is more than 80%,and the bauxite is developed in a closed coastal shallow sea environment,which can be divided into four different hydrodynamic environments:transition period,hydrostatic period,strong turbulence period and weak turbulence period.The bauxite developed in strong turbulence period and weak turbulence period has the conditions to become a reservoir.The bauxite reservoir is characterized by high gamma,high density,high neutron,low resistance and low acoustic wave time difference;Primary intergranular pore network is developed well and secondary pores is undeveloped in the bauxite reservoir,its average effective porosity is 0.17 and permeability is about 100×10^(-3)μm^(2).The gas test results show that the bauxite has good gas bearing property,can be used as a special reservoir and has industrial exploitation value.

关 键 词：铝土岩 硬水铝石 储层评价 测井特征 特殊储层 鄂尔多斯盆地 

分 类 号：TE122.23[石油与天然气工程—油气勘探]