【作者】 柳汉丰；

【导师】 李增学；

【作者基本信息】 山东科技大学 ， 矿产普查与勘探， 2006， 硕士

【摘要】 运用高分辨率层序地层学理论和方法，充分收集和整理钻孔岩心、测井曲线资料，对汶宁煤田的石炭—二叠系含煤地层进行了系统的成因相组合分析和沉积体系划分。研究表明石炭—二叠系可划分为四个沉积体系：潮坪沉积体系、障壁—泻湖沉积体系、河控浅水三角洲沉积体系和河流—湖泊复合沉积体系。重点进行了高分辨率层序界面的识别和对比、高分辨率层序地层划分和内部单元构成分析、基准面旋回识别和对比。在汶宁煤田石炭—二叠系含煤地层中共识别出短周期旋回、中周期旋回和长周期旋回三种。共划分出了4个长周期旋回，9个中周期旋回以及多个短周期旋回。在基准面旋回变化基础上分析总结了汶宁煤田的煤聚集规律：泥炭沼泽的形成与分布受控于基准面变化，不同级次基准面旋回的叠加控制了煤的聚积规律；成煤作用出现在基准面旋回的一定位置上，泥炭沼泽的持续发育需要可容纳空间与沉积物补偿之间的平衡，即当沉积物补给通量变化导致的A／S比值趋于1时，是成煤的有利时期。此外，通过对古植物、古气候、古地理和古构造的基础上研究了汶宁地区的控煤因素。更多还原

【Abstract】 By utilizing the principle and method of the high-resolution sequence stratigraphy and fully collecting core and well log information, this paper systemmaticaly analyzes genetic facies and divides the depositional system of Carboniferous-Permian coal-bearing strata in Wenshang-Ningyang coalfield. It suggests that Carboniferous-Permian can be divided into four depositional system: tidal flat depositional system, barrier-lagoon depositional system, fluvial-dominated shallow water deltaic depositional system, fluvial-lacustrine depositional system. The emphasis of this paper is to identify, contrast and divide the high-resolution sequence interface, analyze the constitution of its internal units, identify and contrast the base level cycle. There are three kinds of cycles in Carboniferous-Permian coal-bearing strata of Wenshang-Ningyang coalfield, namely short-period cycle (several), middle-period cycle (nine)and long-period cycle(four). On the basis of changes of base level cycle the law of coal accumulation in Wenshang -Ningyang coalfield can be analyzed and concluded: the forming and distribution is controlled by changes of base level and the base level superimposition of different ranks controls the law of coal accumulation; incoalation appears on the certain position of base level cycle and the consistent development of peat swamp needs the equilibrium between admissible space and sediment compensation. That is to say it’s the best period of becoming coal when A/C ratio that is caused by the flux changes of sediment compensation is close to 1. Besides, it studies the factors that can control coal on the basis of studying fossil plant, paleoclimate, paleogeography and paleostructure.更多还原