黑龙江东部地区煤层气成藏的构造条件与有利区评价研究

发布时间：2018-05-12 19:53

本文选题：黑龙江东部 + 中生代　；参考：《浙江大学》2015年硕士论文

【摘要】：黑龙江东部地区中生代盆地普遍富集煤炭资源,但对该区煤层气等非常规油气资源的富集规律还缺乏深入的研究。本文利用黑龙江东部地区近年来获取的地震、测井、钻井等勘探资料,以盆地构造解析和演化史分析为基础,重点从盆地发育的构造背景、成盆演化过程等方面,探讨构造因素对煤层气成藏的重要控制作用,然后基于地理信息系统软件Arcgis,运用多层次模糊综合评价方法对煤层气有利区进行了评价预测,取得如下几点认识：1、黑龙江东部地区主要含煤盆地现今多表现为中生代构造残留盆地与新生代盆地的叠合特征,早白垩世时期受古太平洋板块俯冲后撤的影响,研究区内陆壳发生强烈的构造伸展,形成断陷盆地,控制了该区中生代聚煤盆地的形成。早白垩世末期大型浅水湖盆的为该区煤层广泛发育和煤层气的富集成藏奠定了物质基础,晚白垩世以来的构造挤压变形和抬升剥蚀控制了当前煤层气资源的分布、聚集成藏和保存。2、早白垩世城子河组和穆棱组沉积时期,黑龙江东部地区由早期的数个断陷盆地合并发育为统一的大型浅水坳陷湖盆,区内构造条件稳定,整体区域沉积稳定,为黑龙江东部地区主要聚煤时期,其中河流-三角洲平原亚相和三角洲前缘亚相为聚煤作用的最有利沉积环境。3、晚白垩世期间遭受多期挤压变形改造和抬升剥蚀,形成了现今孤立的残留盆地特征,对煤层气资源的分布和局部富集成藏产生了深刻的影响,是当前煤层气富集成藏有利区评价中不可或缺的要素。4、综合利用煤类、煤层厚度、沉积相、含气量、构造条件五个要素分析评价,认为鹤岗盆地新一-南山矿区和兴安-大陆矿区、绥滨坳陷东南部、鸡西盆地北部坳陷带、勃利盆地东南部是煤层气富集成藏最有利区域。
[Abstract]:Coal resources are generally enriched in Mesozoic basins in the eastern part of Heilongjiang Province, but there is a lack of in-depth study on the enrichment law of unconventional oil and gas resources such as coalbed methane in this area. Based on the seismic, logging and drilling data obtained in recent years in the eastern part of Heilongjiang Province, and based on the analysis of structural analysis and evolution history of the basin, this paper focuses on the tectonic background of the basin development and the evolution process of the basin. This paper discusses the important control effect of structural factors on coalbed methane reservoir formation, and then, based on Arcgis, a multi-level fuzzy comprehensive evaluation method is used to evaluate and predict the favorable area of coalbed methane. The main coal-bearing basins in the eastern part of Heilongjiang Province are characterized by the superposition of Mesozoic tectonic remnant basins and Cenozoic basins, and the early Cretaceous period is influenced by the subduction and retreat of the paleo-Pacific plate. The strong tectonic extension of the inland crust in the study area resulted in the formation of faulted basins, which controlled the formation of Mesozoic coal-accumulating basins. The large shallow water lake basin in the late early Cretaceous laid a material foundation for the extensive development of coal seam and the accumulation of coalbed methane in this area. The tectonic compression deformation and uplift denudation since the late Cretaceous controlled the distribution of the current coalbed methane resources. During the deposition period of early Cretaceous Chengzihe formation and Muling formation, the eastern part of Heilongjiang developed from several early faulted basins into a unified large shallow water depression lake basin. The tectonic conditions in the area were stable and the whole regional sedimentation was stable. It is the main coal accumulation period in the eastern part of Heilongjiang, in which fluvial delta plain subfacies and delta front subfacies are the most favorable sedimentary environment for coal accumulation. During the late Cretaceous period, they were subjected to multiple stages of compression deformation transformation and uplift and denudation. The present isolated residual basin features have a profound influence on the distribution of coalbed methane resources and local rich and integrated reservoirs, which are the indispensable elements in the evaluation of the favorable areas for coalbed methane rich and integrated reservoirs at present, and the comprehensive utilization of coal and the thickness of coal seams. Sedimentary facies, gas content and structural conditions are analyzed and evaluated. It is considered that Xinyi-Nanshan and Xingan-continental mining areas in Hegang basin, southeastern Suibin depression, northern depression belt of Jixi basin, The southeastern part of Boli Basin is the most favorable area for coalbed methane accumulation.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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