沁水盆地煤系“三气”储层发育规律及地质控制

发布时间：2018-03-18 18:19

本文选题：煤系　切入点：层序地层　出处：《中国矿业大学》2017年硕士论文　论文类型：学位论文

【摘要】：以煤层气、致密砂岩气及页岩气为主的煤系非常规天然气共探共采是我国天然气产业发展的前缘方向,但关于三类非常规储层相互叠置发育的研究尚处于起步阶段。为此,本文以沁水盆地为研究对象,基于前人测试结果及地质资料梳理,建立了研究区石炭-二叠纪煤系层序地层格架;依托典型钻孔柱状剖面精细描述及含气性特征,划分了含气系统和非常规储层类型;借助连井剖面图和平面分布图,总结了不同类型储层的空间展布规律;从沉积控制和层序格架的角度,分析了不同类型储层形成的地质控制机理。结果表明,山西组~太原组共发育6个三级层序,12个体系域,在垂向上可以划分为四大含气系统,五段有利含气层段;在各有利层段内,煤系非常规储层可划分为5类,即单一煤储层、单一泥岩储层、煤-泥混合型储层、砂-泥混合型储层及煤-泥-砂混合型储层;其中,单一煤储层主要发育在层序SQ1的海侵体系域和SQ5的高位体系域,单一泥岩储层主要发育在层序SQ4的高位体系域,煤-泥混合储层主要发育在层序SQ1、SQ3和SQ5,砂-泥混合储层主要发育在层序SQ3和SQ6,煤-泥-砂混合储层在各层序均有发育。
[Abstract]:Co-exploration and co-production of unconventional natural gas in coal series, which mainly consists of coalbed methane, tight sandstone gas and shale gas, is the leading direction of the development of natural gas industry in China, but the study on the superposition and development of three kinds of unconventional reservoirs is still in its infancy. Taking Qinshui Basin as the research object, based on the previous test results and geological data, the sequence stratigraphic framework of Carboniferous-Permian coal measures in the study area is established, which relies on the fine description and gas-bearing characteristics of typical drilled columnar sections. The types of gas-bearing system and unconventional reservoir are divided, the spatial distribution of different types of reservoirs are summarized with the aid of multi-well profile and plane distribution map, and from the point of view of sedimentary control and sequence framework, The geological control mechanism of the formation of different types of reservoirs is analyzed. The results show that there are 6 third-order sequences and 12 system tracts developed from Shanxi formation to Taiyuan formation, which can be divided vertically into four gas-bearing systems and five favorable gas-bearing formations. The unconventional coal measures reservoir can be divided into 5 types in each favorable formation, that is, single coal reservoir, single mudstone reservoir, coal-mud mixed reservoir, sand mud-mixed reservoir and coal-mud-sand mixed reservoir, in which, The single coal reservoir is mainly developed in the transgressive system tract of sequence SQ1 and the high system tract of SQ5, while the single mudstone reservoir is mainly developed in the high system tract of sequence SQ4. Coal-mud mixed reservoir is mainly developed in sequence SQ1SQ3 and SQ5, sand / mud mixed reservoir is mainly developed in sequence SQ3 and SQ6, coal-mud-sand mixed reservoir is developed in each sequence.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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