柴西北小梁山地区混积岩测井岩性识别  

Lithology Identification on Mixing Deposit with Logging Data in Northwest Xiaoliangshan of Qaidam Basin

作　　者：司马立强[1] 杨毅[1] 吴丰[1] 姚军朋 张凤生 张延华[3] 

机构地区：[1]西南石油大学地球科学与技术学院,成都610500 [2]中国石油测井有限公司油气评价中心,西安710077 [3]中国石油天然气股份有限公司青海油田分公司勘探开发研究院,甘肃敦煌736202

出　　处：《地质科技情报》2014年第2期180-185,共6页Geological Science and Technology Information

基　　金：中国石油重大科技专项(2011E-0305);西南石油大学研究生创新基金(GIFSS0710)

摘　　要：柴达木盆地西北部的小梁山背斜构造,陆源碎屑和湖相碳酸盐混合沉积广泛发育,地层岩石类型多样,测井响应特征复杂,岩性识别非常困难。结合岩石物理实验数据(铸体薄片、粒度分析、X射线衍射全岩分析、碳氯分析)和测井资料,对研究区混积岩岩石组分的类型、粒度和质量分数进行了细致的分析研究,以岩石组分的相对质量分数和测井响应特征为依据,对岩性进行了简化归类,建立了测井资料识别岩性标准,在此基础上利用ΔGR、Δlg(LLD)和M参数绘制了混积岩岩性识别电性组合图,并建立了岩性质量分数计算模型,形成了一套小梁山地区测井岩性综合识别方法,为小梁山地区的储层测井评价和综合地质研究奠定了基础,对中浅层混积岩的测井解释研究具有借鉴与参考意义。Diamictites, composed of terrigenous and carbonate clasts of lacustrine facies are extensively developed in the Xiaoliangshan anticline in the northwest Qaidam Basin. The lithological diversity of the deposit causes the com- plexity of logging response and difficulties in rock type identification from the drilling cores. We combine petro- physical parameters （X-ray diffraction, rock slabs, thin-section, carbon chloride analysis, and grain size analysis） and logging material to carry out a detailed analysis on mineral components, content and particle size of the diamic- tite, and classify the rock based on logging response characteristics and mineral components, which provide a standard of lithological identification. On that basis, we propose an identification electrical crossplot for diamictites and build a material content calculation model by using AGR, Alg （LLD） and M parameters. This helps to form a logging lithological identification method for reservoir evaluation and comprehensive geological research in the Xia- oliangshan region, and has application for interpretation of other diamictite deposits worldwide.

关 键 词：柴达木 混积岩 测井 岩性 图版 

分 类 号：P631.8[天文地球—地质矿产勘探]