梁山煤田高分辨率层序地层与聚煤规律研究

摘要

Based on the principle of high resolution sequence stratigraphy ,through analysis and constrast on drilling datas of Liangshan coal mine ,coal bearing strata in Liangshan coal mine can be divided into 6 long period base level cycles ,10 middle period base level cycles and 30 short period base level cycles .High resolution sequence stratigraphy framework of coal bearing strata in Liangshan coal mine has been estab‐lished .Through study on lithologic features and sedimentary rule of coal bearing strata in Liangshan coal mine ,two coal accumulating periods of Liangshan coal mine have been analyzed .It is showed that coal bearing strata in Taiyuan formations were mainly formed in lagoon and tidal flat environments in the rising semi cycle in base level cycle ;while the coal in shanxi formations was mainly formed in shallow water delta depositional system ,and coal strata were mainly occurred in the falling semi cycle of short period base level cycle .%以高分辨率层序地层学原理为指导，通过对梁山煤田钻孔资料的分析和对比，将梁山煤田含煤地层划分为6个长周期基准面旋回、10个中期基准面旋回和30个短期基准面旋回，建立了梁山煤田含煤地层的高分辨率层序地层格架。研究了含煤地层岩性特征及沉积规律，分析出梁山煤田2个重要的聚煤时期。分析表明，该区太原组煤层主要形成于基准面旋回的上升旋回的泻湖、潮坪沉积环境；山西组成煤阶段主要属浅水三角洲沉积体系，煤层主要出现于短期基准面下降半旋回。