碎屑岩成岩阶段细分与应用——以松辽盆地齐家—古龙地区为例  

The subsection of diagenetic stages in clastic rocks and applications:A case study of Qijia-Gulong area of Songliao Basin

作　　者：孟元林[1] 张磊[2] 陶士振[3] 李国会 李新宁 代天娇 陈国松 MENG Yuanlin;ZHANG Lei;TAO Shizhen;LI Guohui;LI Xinning;DAI Tianjiao;CHEN Guosong(School of Geosciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China;PetroChina Research Institute of Petroleum Exploration Development,Beijing 100083,China;Exploration and Development Research Institute of Daqing Oilfield Company Ltd,Daqing,Heilongjiang 163517,China;PetroChina Exploration and Development Research Institute of Tuha Oil Company,Hami,Xinjiang 839009,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]核工业北京地质研究院,北京100029 [3]中国石油勘探开发研究院,北京100083 [4]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163517 [5]中国石油吐哈油田分公司勘探开发研究院,新疆哈密839009

出　　处：《中国矿业大学学报》2020年第5期920-930,共11页Journal of China University of Mining & Technology

基　　金：“十三五”国家科技重大专项(2016ZX05046-001-006)。

摘　　要：为了更好地研究碎屑岩成岩作用对石油形成和分布的影响与控制,本文以松辽盆地齐家-古龙地区为例,基于有机质热演化过程中的物质平衡原理、石油有机地球化学的基本原理与碎屑岩成岩演化规律,依据流体包裹体均一温度、镜质组反射率、孢粉颜色、泥岩热解、色质、X-衍射、扫描电镜、电子探针、薄片和铸体薄片镜下鉴定等资料,提出了碎屑岩中成岩阶段A期的细分方案,并进行了成岩作用数值模拟,预测了油气聚集的有利地区.研究结果表明:以Ro等于0.6%,0.7%,1.0%为界,碎屑岩的中成岩阶段A期可进一步细分为A1^1,A1^2,A2^1和A2^2这4个成岩微期;成岩作用对齐家-古龙地区高台子油层(K2qn^2+3)油气的形成与分布具有明显的控制作用,工业油气层(常规油气层和致密油气层)分布在中成岩阶段A1^1-A2^2微期,且在中成岩阶段A2^1微期富集.高Ⅳ油组成岩阶段和成岩微期的预测结果表明,从研究区的边部到中央,成岩强度逐渐增强,A1^1,A1^2,A2^1和A2^2这4个成岩微期依次展布,但大部分地区处于A2^1成岩微期.总之,松辽盆地齐家-古龙地区高台子油层(K2qn^2+3)的生、储油层发育良好,成藏条件优越,有利于油气的聚集.In order to study the effect and control of diagenesis in clastic rocks on the formation and occurrence of petroleum, the subsection scheme of diagenetic stages A in clastic rocks in the Qijia-Gulong area of Songliao Basin was proposed based on the principle of material balance in the thermal evolution of organic matter, basic principles of petroleum organic geochemistry and diagenetic evolution in clastic rocks. The data from homogenization temperature of fluid inclusions Th, Ro, sporopollen color, mudstone pyrolysis, GC-MS, XRD, SEM, EPM, microscopic identification of thin section and casting thin section data etc. were used in this study. The diagenetic numerical modelling was also carried out. The results showed that, with 0.6%, 0.7% and 1.0% as the boundaries of Ro, the middle diagenetic stage A of the clastic rocks can be further subdivided into four diagenetic micro-stages: A1^1, A1^2, A2^1 and A2^2. The diageneses play an important role in controlling the formation and occurrence of petroleum in Gaotaizi reservoir(K2qn^2+3) of the study area. Both conventional and tight industrial reservoirs are distributed in the micro-stages A1^1-A2^2, and are enriched in the micro-stage A2^1. The diagenetic stages/micro-stages prediction results of Gao IV oil group showed that diagenetic intensity increases gradually from the edge to the center of the study area. Four diagenetic micro-stages, A1^1, A1^2, A2^1 and A2^2, are appeared in turn, but most of the area is within the micro-stage A2^1. In a word, the source rocks and reservoir rocks of Gaotaizi reservoir(K2qn^2+3) in Qijia-Gulong area of Songliao Basin are well developed, oil-gas reservoir-forming conditions are excellent, which is beneficial to the enrichment of petroleum.

关 键 词：成岩阶段细分 成岩作用数值模拟 致密油储层 松辽盆地 高台子油层(K2qn^2+3) 

分 类 号：TE122.2[石油与天然气工程—油气勘探]