黔西北龙潭组煤系地层层序-沉积特征及聚煤规律研究  

Sequence-Depositional Characteristics and Coal Accumulation Patterns of Longtan Coal Strata in Northwestern Guizhou

作　　者：孙昌花 许浩[2,3,4] 汤达祯[2,3,4] 辛福东 任鹏飞[2,3,4] 曹立坤 SUN Chang-hua;XU Hao;TANG Da-zhen;XIN Fu-dong;REN Peng-fei;CAO Li-kun(Guizhou Natural Gas Energy Investment Co.,Ltd,Guiyang 550081,China;School of Energy,China University of Geosciences(Beijing),Beijing 100083,China;Coal Reservoir Laboratory of National Engineering Research Center of CBM Development&Utilization,China University of Geosciences,Beijing 100083,China;Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering,Beijing 100083,China)

机构地区：[1]贵州天然气能源投资股份有限公司,贵阳550081 [2]中国地质大学(北京)能源学院,北京100083 [3]煤层气开发利用国家工程研究中心,中国地质大学(北京)煤储层物性实验室,北京100083 [4]中国地质大学(北京)非常规天然气地质评价与开发工程北京市重点实验室,北京100083

出　　处：《科学技术与工程》2018年第9期46-55,共10页Science Technology and Engineering

基　　金：国家科技重大专项(2016ZX05044-001)资助

摘　　要：基于Vail提出的层序地层学理论,综合利用录井、岩心、测井等资料,并结合小波分析的方法划分了黔西龙潭组含煤地层的三级层序。与传统方法相比,小波变换具有定量划分地层层序的优势,避免了主观人为因素过多的弊端。最终,将黔西北龙潭组划分为4个三级层序、8个体系域。在对层序结构进行划分的基础上,对层序格架内的沉积相类型与特征进行分析,确定研究区主要的沉积相类型为三角洲相和泻湖-潮坪相。进而对层序格架下的煤层发育情况进行分析,三角洲平原最大海泛面附近和潮坪海侵体系域聚煤作用最强。Based on the sequence theory of Vail,the third-order sequence stratigraphy framework of Longtan coal strata in northwestern Guizhou was established through analysing core data,logging data and using the wavelet transform technique.Comparing with the conventional methods that involve many subjective human factors,the wavelet transform technique has the advantage of dividing sequence stratigraphy quantitatively.Finally,Longtan Formation into 4 third-order sequences,8 tracts.Based on the division of sequence formation unit,the sedimentary facies and its distribution law in study area was discussed.This area mainly develops delta and lagoon-tidal flat.Proceed to the next step,the coal-accumulating characteristics in the sequence stratigraphic framework was discussed.The thick coal seams are developed in the maximum flooding surface of delta plain environments and transgressive system tract of tidal flat.

关 键 词：黔西北 煤系地层 地层层序 小波变换 测井数据 聚煤规律 

分 类 号：P618.13[天文地球—矿床学]