柴达木盆地东部石炭系致密灰岩孔渗特征

碳酸盐岩储层孔隙系统复杂。对空隙结构特征、渗流机理的研究直接影响到油气资源的勘探和开采。本研究选取了柴达木盆地东部地区ZK5-2钻井中石炭系的5块致密灰岩样品,通过XRD、XRF技术对灰岩的矿物成分、化学成分进行定量测试;利用氦气双室法与孔径分布实验(包括压汞法、氮气吸附法、二氧化碳吸附法)确定灰岩的孔隙度与空隙的孔径分布;用CH4、N2、CO2、He四种气体进行渗流实验确定灰岩的表观渗透率。研究结果表明:致密灰岩的表观渗透率与其孔隙度没有明显的关系。表观渗透率由达西流、滑脱流与扩散流三部分组成,表观渗透率大小按CH4、N2、CO2、He的顺序依次增加,其中He所测得的表观渗透率明显高于其他三...

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Volume: 36
Main Author: 马龙杰 彭博 于青春
Format: Journal Article
Language: Chinese
Place of publication: 中国地质大学(北京)水资源与环境学院,北京,100083%中国地质科学院地质力学研究所,北京,100081 2017
published in: Zhongguo yan rong Vol. 36; no. 1; pp. 15 - 22
Data of publication: 2017
ISSN: 1001-4810
Alternate Title: Porosity and permeability characteristics of compact Carboniferous limestone in the eastern Qaidam basin
Classification Codes:
Discipline: Geography
Bibliography: compact limestone,apparent permeability,gas slippage,diffusion behavior,eastern Qaidam basin
45-1157/P
MA Longjie1 , PENG Bo2 ,YU Qingchun1 (School of Water Resources and Environment, China University of Geoscienees, Beijing 100083, China 2. Institute of Geomechanics , CAGS, Beijing 100081, China)
The pore system of carbonate rock reservoirs is complex. The study of the pore structure characteristics and flow mechanism has a direct impact on the exploitation of oil and gas resources. This work analyzed five tightly consolidated Carboniferous limestone samples taken from the borehole ZK5-2 in the eastern Qaidam basin. The mineral and chemical compositions of these samples were analysed using X ray diffraction (XRD) and X ray fluorescence (XRF) techniques; and the porosity and pore structure characteristics were further studied respectively using helium double chamber method and aperture distribution tests (using the mercury intrusion, nitrogen adsorption and carbon dioxide adsorption methods). Four kinds of gases
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