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引用本文:刘传鹏. 准噶尔盆地莫西庄地区三工河组二段储层微观特征及有效储层控制因素[J]. 中国地质, 2013, 40(5): 1515-1522.
LIU Chuan-peng. Reservoir microscopic characteristics and effective reservoir control factors of J1s2 in Moxizhuang area, Junggar Basin[J]. Geology in China, 2013, 40(5): 1515-1522(in Chinese with English abstract).
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准噶尔盆地莫西庄地区三工河组二段储层微观特征及有效储层控制因素
刘传鹏
中国石化胜利油田分公司西部新区研究中心, 山东 东营 257001
摘要:
提要:通过普通薄片和铸体薄片观察、孔隙显微图像分析、扫描电镜和阴极发光等测试手段,研究了莫西庄地区三工河组二段储层岩石学、孔隙类型和成岩作用等微观特征,分析了低渗储层的形成原因和相对优质储层的主控因素。研究结果表明:砂岩以成分成熟度较低的长石岩屑砂岩为主,含少量岩屑砂岩,软岩屑塑性变形强烈或假杂基化,对储层物性和含油性影响大;砂岩孔隙类型主要为次生溶蚀孔,其次为剩余原生粒间孔;强烈的压实作用、方解石和高岭石胶结作用是导致储层低渗的主要原因。优质储层表现为粗粒、低含量软岩屑-弱方解石和高岭石胶结-强溶蚀作用的微观特征。优质储层形成的主要控制因素包括软岩屑含量、晚期溶蚀作用和有利的沉积相带,河道砂体旋回中、下部储层是有效储层发育的有利部位。
关键词:  低渗储层  微观特征  成岩作用  主控因素  莫西庄地区
DOI:
分类号:
基金项目:国家科技重大专项课题(2011ZX05002-002)资助。
Reservoir microscopic characteristics and effective reservoir control factors of J1s2 in Moxizhuang area, Junggar Basin
LIU Chuan-peng
Western New Prospect Research Center of Shengli Oilfield Company, Sinopec, Dongying 257001, Shandong,China
Abstract:
Abstract:Through the analysis of casting thin sections and pore microscopic images, combined with scanning electron microscopy and cathodoluminescence images, the reservoir microscopic characteristics of J1s2 in Moxizhuang area were studied, which included reservoir petrology, pore types, diagenesis etc. In addition, the factors responsible for the formation of low permeability reservoirs and the main controlling factors of relatively high quality reservoirs were analyzed. The results show that the sandstones are mainly feldspathic-lithic sandstones with low ingredients maturity, with a small amount of lithic sandstone. The soft debris has experienced strong plastic deformation, thus looking like matrix, which remarkably affects physical property and oil-bearing property of the reservoir. The pore type is mainly secondary pore and subordinately primary pore. Strong compaction, weak calcite and kaolinite cementation are the main factors responsible for the low permeability reservoirs. The high quality reservoirs have such microscopic characteristics as coarse grain size, low content of soft debris, weak calcite and kaolinite cementation and strong dissolution. So the main factors controlling high quality reservoirs should include the content of soft debris, late dissolution, and favorable sedimentary facies. In addition, the channel sand body cycles in the middle and lower reservoir are the favorable parts of the effective reservoir.
Key words:  low permeability reservoir  microscopic feature  diagenesis  main controlling factors  Moxizhuang area