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作 者:许艳争[1]
机构地区:[1]中国石化华北油气分公司勘探开发研究院,河南郑州450001
出 处:《石油地质与工程》2016年第5期48-51,55,共5页Petroleum Geology and Engineering
基 金:国家科技重大专项"鄂尔多斯盆地碎屑岩层序大中型油气富集规律与勘探方向"(2011ZX05002)
摘 要:综合利用岩心、分析化验资料中的铸体薄片、扫描电镜等测试手段并结合测井资料,研究了鄂尔多斯盆地红河油田延11储层的岩石学特征、孔隙结构特征和物性特征;结合沉积作用、成岩作用研究,探讨了该区导致储层致密的主控因素。结果表明:延11储层主要为石英砂岩、长石石英砂岩和岩屑石英砂岩,成分成熟度中等,结构成熟度中-好,储层物性较差,分选好-中等;初始孔隙度平均38.8%,强烈的压实作用及胶结作用破坏了74.2%的原生孔隙,早期原生孔隙多被压实作用破坏,溶蚀作用增加了大约11.9%的次生孔隙度,是改善储层物性的重要因素;成岩压实作用和胶结作用导致红河油田延11储层致密。By comprehensive use of coring,casting thin section,scanning electron microscope,etc.,together with the logging data,the research on reservoir petrologic characteristics,pore structure characteristics and physical properties was carried out.Combined with the sedimentation and diagenesis research,the main controlling factors of tight sandstone were discussed.The research results indicated Yan-11 oil layers were mainly of quartz sandstone,feldspathic quartz sandstone and lithic quartz sandstone,the compositional maturity and textural maturity of sandstone were middle to high and the reservoir property was poor.The selectivity of sandstone was good,the initial porosity overall was high,about 38.8% on average.Due to the strong effects of rock components,74.2% primary pores were destructed and11.9% secondary pores were increased by the dissolution.Therefore,the diagenetic compaction and cementation are the main reasons of leading to tight sandstone of Yan-11 oil layers in Honghe oil field.
关 键 词:红河油田 延11油层组 致密砂岩 储层特征 主控因素
分 类 号:TE112.23[石油与天然气工程—油气勘探]
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