琼东南盆地崖城组煤系空间展布特征  

Coal-bearing Distribution Characteristics of Yacheng Formation in Qiongdongnan Basin

作　　者：李增学[1] 周静[1] 吕大炜[1] 王东东[1] 刘海燕[1] 杨其栋[1] 

机构地区：[1]山东科技大学山东省沉积成矿作用与沉积矿产重点实验室,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2013年第2期1-8,共8页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(40872100);国土资源部海洋油气资源与环境地质重点实验室项目(MRE201010);山东省优秀中青年科学家科研奖励基金项目(BS2011SF017)

摘　　要：从沉积和构造控煤的角度研究了琼东南盆地崖城组煤系的空间展布特征。崖城组沉积早期主要发育河流-湖泊沉积,煤层主要发育在辫状河三角洲平原沼泽环境;中-晚期主要发育泻湖和潮坪沉积,煤层主要发育在潮坪沼泽环境。在平面上,煤层主要发育在盆地的北部各凹陷/凸起周缘相对平坦的斜坡带上;南部聚煤作用次之。在构造控制作用下,不同的地堑、地垒组合控制了煤系发育的岩相组合特征、煤系的水平分带性、构造沉降的速率和煤系的厚度。从不同的角度阐述了煤层的发育与分布特征、沉积和构造的控煤作用,为预测煤层发育和分布特征提供了依据。Based on sedimentary and structural controiling coal,this paper focused on the spatial distribution characteristics of coal in Yacheng Formation, Qiongdongnan Basin, which mainly developed into fluvial-lacustrine deposition in early stage, with the coal seam occurring on braided river delta plain swamp, and into lagoon-tidal flat deposition with the coal seam mainly located in tidal flat swamp during the middle stage. HorizontalIy,coal seams are mainly distributed in the slope belt around the edges of sags and uplifts in the northern basin, whereas coal accumulation becomes weak in the southern basin. Under structure control, different combinations of graben and horst together control facies associations of coal seam, horizontal zones of coal seams, tectonic subsidence rate and coal thickness. In the paper, the authors state the development and distribution characteristics of coal seams as well as coal controlling factors of sedimentation and tectonic differently,and provide the basis for forecasting.

关 键 词：沉积 构造 煤系展布 崖城组 琼东南盆地 

分 类 号：TE112.115[石油与天然气工程—油气勘探]