Characteristics and distribution prediction of lithofacies of Carboniferous igneous rocks in Dixi area, East Junggar
东准噶尔滴西地区石炭系火成岩岩相特征及分布预测

The researches on oil-and gas-bearing volcanic rocks have largely developed the foreground of oil exploration. Gas reservoirs in Carboniferous igneous rocks of Dixi area is the main production part of Kelameili gas field, which located in the west of Dina uplift, southeast of Luliang uplift. In this study, igneous lithologies in Dixi area are identified and classified using core observation, cuttings slice analysis and FMI rock texture and structural interpretations; On the basis of single-well lithologic identification and lithofacies division, combined with well logging and seismic data, established the seismic facie models of different lithofacies and the characteristics are analysed; Take the advantage the relationship between geology and seismic data, the distribution of igneous lithofacies are predicted using seismic attribute analysis, including wave analysis and time slice. The results show that there are volcanic channel facies, eruption facies, overflow facies, volcanic sedimentary facies and intrusive facies developed, intermediate-basic overflow facies are mainly distributed in the Northwest area and intermediate-acid overflow facies are mainly distributed in the Southeast, the middle part of Dixi area mainly developed eruption facies and volcanic sedimentary facies, a separate intrusive body is developed in Dixi 18 well block, and is shallow intrusive facies.