青海省柴达木盆地北缘侏罗系含煤地层测井相分析研究

在柴达木盆地北缘含煤区的地质勘查中，依据测井单参数曲线与多参数组合曲线特征，结合传统地质学，建立了与勘探区地质沉积相对应的测井相。其中鱼卡二井选择了详查阶段的7个钻孔测井资料，依据各岩性段的岩石组合、层序、沉积相变化等规律，将其含煤地层大煤沟组分为4个测井相；同样在红柳泉项目，将整个含煤岩段从下到上划分为8个测井相。通过以岩石标志层和煤岩层为骨架进行的全井田测井相分析，为该区建立了一套直观、连续、可比性强的煤岩层对比和聚煤环境分析的有效方法。

Jurassic Coal-bearing Strata Electrofacies Analytic Investigation in North Margin of Qaidam Basin, Qinghai Province

During the geological exploration in the north margin of the Qaidam Basin, based on features of well logging singleparameter traces and multi-parameter combination traces established electrofacies corresponding to exploration area geological sedimentary facies. Of which, in the Iqe No.2 coalmine, general exploration stage well logging data of 7 boreholes were selected, based on regular pattern of each lithologic sector rock association, sequence of strata, sedimentary facies variation, divided the coalbearing strata - the Dameigou Formation into 4 electrofacies. In the same way divided the whole coal-bearing lithologic sector of the Hongliuquan project into 8 eleetrofacies from bottom to top. The whole minefield electrofacies analysis using rock marker bed and coal seams and strata as framework, established a set of intuitional, continuous, better comparability coal-seams and rock strata correlation and coal-accumulation environment analysis effective method for the area.