湖南保靖地区龙马溪组层序地层及沉积微相研究
发布时间：2018-09-08 17:36
【摘要】：通过钻井、测井结合野外露头分析,运用高分辨率层序地层学思路和方法,对湖南保靖地区龙马溪组进行层序地层划分及沉积微相研究。湖南保靖地区龙马溪组划分出三个中周期基准面旋回(sq1,sq2,sq3),组成一个长周期基准面旋回(SQ1),可以在研究区内良好对比。sq1的基准面上升半旋回为深水滞留盆地沉积,基准面下降半旋回为浊积扇网状水道沉积;sq2、sq3的基准面上升半旋回为浅水滞留盆地沉积,基准面下降半旋回为浊积扇扇中前缘席状砂沉积。从早到晚沉积盆地海平面逐渐下降,沉积中心向西北方向迁移。参考层序地层特征,结合本区页岩气地质条件,认为东南部甘溪-大坨地区为页岩气勘探有利区。
[Abstract]:By drilling, logging and outcrop analysis, the sequence stratigraphy and sedimentary microfacies of Longmaxi formation in Baojing area, Hunan Province were studied by using high-resolution sequence stratigraphy. The Longmaxi formation in Baojing area, Hunan Province can be divided into three medium-period base-level cycles (sq1,sq2,sq3) and a long-period base-level cycle (SQ1). The semicircle of base-level descent is that of turbidite fan net channel sediment / sq2ksq3, and that of base-level descending half-cycle is shallow water retention basin, and that of base-level descending semi-cycle is that of turbidite fan with the front edge sand deposit in the middle of turbidite fan. The sea level of sedimentary basin decreases gradually from early to late, and the sedimentary center moves northwestward. According to the sequence stratigraphic characteristics and the geological conditions of shale gas in this area, it is considered that the Ganxi-Datuo area in the southeast of China is a favorable area for shale gas exploration.
【作者单位】： 神华地质勘查有限责任公司;中国石油大学;
【基金】：国家自然科学基金“云质岩致密油储层微米-纳米孔喉网络体系及其流体耦合流动机理与流动下限”(编号:41372145)资助
【分类号】：P539.2;P618.13
[Abstract]:By drilling, logging and outcrop analysis, the sequence stratigraphy and sedimentary microfacies of Longmaxi formation in Baojing area, Hunan Province were studied by using high-resolution sequence stratigraphy. The Longmaxi formation in Baojing area, Hunan Province can be divided into three medium-period base-level cycles (sq1,sq2,sq3) and a long-period base-level cycle (SQ1). The semicircle of base-level descent is that of turbidite fan net channel sediment / sq2ksq3, and that of base-level descending half-cycle is shallow water retention basin, and that of base-level descending semi-cycle is that of turbidite fan with the front edge sand deposit in the middle of turbidite fan. The sea level of sedimentary basin decreases gradually from early to late, and the sedimentary center moves northwestward. According to the sequence stratigraphic characteristics and the geological conditions of shale gas in this area, it is considered that the Ganxi-Datuo area in the southeast of China is a favorable area for shale gas exploration.
【作者单位】： 神华地质勘查有限责任公司;中国石油大学;
【基金】：国家自然科学基金“云质岩致密油储层微米-纳米孔喉网络体系及其流体耦合流动机理与流动下限”(编号:41372145)资助
【分类号】：P539.2;P618.13
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