准噶尔盆地中拐凸起佳木河组沸石类胶结砂砾岩储集层成因机理

发布时间：2018-01-08 21:19

本文关键词：准噶尔盆地中拐凸起佳木河组沸石类胶结砂砾岩储集层成因机理　出处：《新疆石油地质》2017年03期 　论文类型：期刊论文

【摘要】：沸石类胶结砂砾岩储集层成因机理不明是当前中拐凸起二叠系佳木河组油气勘探面临的关键问题,以岩心观察为基础,显微镜下分析为辅助,结合电子探针等微区地化测试方法,基于沉积相与成岩作用分析,建立沉积环境、成岩环境与储集层成因之间的相互关系,探讨了准噶尔盆地中拐凸起佳木河组砂砾岩储集层成因机理。佳木河组砂砾岩表现为低孔低渗的致密型储集物性特点,其成因可归纳为4点:(1)特殊冲积扇沉积环境布控,是多类型岩相形成的基础;(2)短暂开放性碱性成岩环境诱导,为早期广泛沸石类胶结提供形成环境;(3)快速多次酸性-碱性成岩环境交替,是次生孔隙形成的关键;(4)长期封闭型碱性成岩环境主导,是储集层致密化的重要原因。以洪冲积扇扇缘—扇中亚相为主的佳木河组,6种沉积微相与多种成岩作用共同响应,形成4种沸石类胶结砂砾岩岩相,粗粒径-中等压实-中强胶结-溶蚀成岩相在冲积扇扇缘水下分流河道微相的控制下形成区域范围最为有利的储集层类型,将是后续油气勘探的重点关注目标。
[Abstract]:Zeolite cement gravel rock reservoir formation mechanism is unknown turn key problems raised Jiamuhe group of oil and gas exploration at present, on the basis of core observation, microscope analysis assisted by electron probe micro area test method, based on the sedimentary facies and diagenesis, establish sedimentary environment into the relationship between environment and reservoir rock layer causes between the study of Zhongguai uplift in Junggar basin jiamuheformation glutenite reservoir formation mechanism. The Jiamuhe group conglomerate called physical characteristics of dense reservoir with low porosity and low permeability, the reasons can be summarized as 4 points: (1) special alluvial fan sedimentary environment control, is the formation of multiple types of lithofacies; (2) a short opening induced by alkaline diagenetic environment, provide environment for the formation of early extensive zeolite cementation; (3) fast multiple acidic alkaline diagenetic environment alternately, is the formation of secondary porosity. The key; (4) long closed type alkaline diagenetic environment is an important reason leading reservoir layer densification. The alluvial fan fringe - jiamuheformation fan middle facies, 6 sedimentary microfacies and diagenesis of the common response, formed 4 kinds of zeolite cement gravel coarse lithofacies. Size - medium - strong compaction and cementation and dissolution diagenetic facies in the alluvial fan margin of subaqueous distributary channel under the control of the formation of regional scope the most favorable reservoir reservoir types, will focus on follow-up targets for oil and gas exploration.

【作者单位】：中国石油勘探开发研究院博士后流动站;中国石油新疆油田分公司博士后工作站;中国石油新疆油田分公司勘探开发研究院;
【基金】：国家油气重大专项(2016ZX05047001-004)
【分类号】：P618.13
【正文快照】： b.勘探开发研究院,新疆克拉玛依834000)准噶尔盆地是中国西部的一个典型大型叠合含油气盆地[1-4],西北缘作为前陆盆地山前冲断区,是区域油气的主要富集区,中拐凸起区二叠系中深层砂砾岩储集层的油气勘探更是近年来的热点。准噶尔盆地西北缘二叠系砂砾岩储集层具有平面分布广、

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