吐哈盆地下侏罗统八道湾组页岩气成藏条件分析

吐哈盆地下侏罗统八道湾组是该盆地重要的煤炭资源产出的层位。该时期内不仅煤层发育,泥/页岩、碳质泥岩以及暗色泥岩等有利于页岩气生成的岩性也大面积发育。八道湾组泥页岩发育,最大厚度达到200m,泥岩的有机碳含量均值达到了1.85%,干酪根类型以Ⅲ型为主,有机质成熟度已经达到了大量生气的阶段,岩石的石英含量较高,有利于后期开发的实施。按照各项条件的约束,圈定托克逊、吐鲁番、七泉湖一带为煤系页岩气远景区。为本区内页岩气的进一步勘探开发提供基础资料和科学依据。

ANALYSES ON SHALE GAS RESERVOIR CONDITIONS IN LOWER JURASSIC BADAOWAN FORMATION OF TURPAN-HAMI BASIN

Lower Jurassic Badaowan formation of Turpan-Hami basin is an important output stratum of coal resources. During this period, not only the coal, but clay / shale, carbonaceous shale and dark mudstone which are conducive to shale gas generation developed in a large area. The shale in Badaowan formation developed with the maximum thickness being 200m and the mean organic carbon content reached at 1.85%; The kerogen of shale is mainly type III and organic maturity has reached the stage of numerous gas production. High quartz content of the rock contributes to development of post-implementation. According to the constraint conditions, Tuokexun, Turpan and Qiquan Lake are delineated as the prospective area of coal shale gas, which provides the basic data and scientific basis for the further shale gas exploration of this region.