柴达木盆地英西地区湖相混积型碳酸盐岩储层成因及发育模式

TE122.1; 以柴达木盆地英雄岭构造带西段(英西地区)始新统为研究对象,综合岩心、全岩X衍射、铸体薄片、阴极发光、扫描电镜、碳氧同位素、溶蚀模拟实验等测试结果,探讨湖相混积型碳酸盐岩储层的基本特征、成因机制和发育模式.结果表明:研究区储层岩矿组成以碳酸盐矿物为主,并与陆源碎屑、蒸发岩矿物和黏土矿物等混积形成混积型碳酸盐岩;按岩性可分为颗粒灰云岩、含膏灰云岩、泥晶灰云岩、纹层状灰云岩和角砾状灰云岩5种;储集空间存在孔、洞、缝等多种形式,孔径尺寸范围从纳米级到厘米级.岩性的多样性决定了储集空间具有多种尺度和多种成因,可将储层划分为白云石晶间孔型、溶蚀孔型、裂缝-角砾间孔(洞)型3类储层.晶间孔...

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Published in中国石油大学学报(自然科学版) Vol. 46; no. 3; pp. 1 - 12
Main Authors 宋光永, 朱超, 李森明, 王艳清, 龙国徽, 宫清顺, 田明智, 伍劲
Format Journal Article
LanguageChinese
Published 中国石油杭州地质研究院,浙江杭州310023%中国石油青海油田分公司勘探开发研究院,甘肃敦煌736202 01.06.2022
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ISSN1673-5005
DOI10.3969/j.issn.1673-5005.2022.03.001

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Abstract TE122.1; 以柴达木盆地英雄岭构造带西段(英西地区)始新统为研究对象,综合岩心、全岩X衍射、铸体薄片、阴极发光、扫描电镜、碳氧同位素、溶蚀模拟实验等测试结果,探讨湖相混积型碳酸盐岩储层的基本特征、成因机制和发育模式.结果表明:研究区储层岩矿组成以碳酸盐矿物为主,并与陆源碎屑、蒸发岩矿物和黏土矿物等混积形成混积型碳酸盐岩;按岩性可分为颗粒灰云岩、含膏灰云岩、泥晶灰云岩、纹层状灰云岩和角砾状灰云岩5种;储集空间存在孔、洞、缝等多种形式,孔径尺寸范围从纳米级到厘米级.岩性的多样性决定了储集空间具有多种尺度和多种成因,可将储层划分为白云石晶间孔型、溶蚀孔型、裂缝-角砾间孔(洞)型3类储层.晶间孔型储层形成于准同生期的白云石化作用,是咸化湖盆周期性咸化的必然结果,该类储层分布广,是湖相混积型碳酸盐岩储层的主要类型;溶蚀孔型储层是准同生期大气淡水溶解蒸发岩矿物的结果,优先发育于洼中古隆起内含膏灰云岩和颗粒灰云岩中,分布相对局限.裂缝-角砾间孔(洞)型储层为构造成因,产生于狮子沟断层沿膏盐层发生大规模逆冲、滑脱变形的过程中,呈连片分布.
AbstractList TE122.1; 以柴达木盆地英雄岭构造带西段(英西地区)始新统为研究对象,综合岩心、全岩X衍射、铸体薄片、阴极发光、扫描电镜、碳氧同位素、溶蚀模拟实验等测试结果,探讨湖相混积型碳酸盐岩储层的基本特征、成因机制和发育模式.结果表明:研究区储层岩矿组成以碳酸盐矿物为主,并与陆源碎屑、蒸发岩矿物和黏土矿物等混积形成混积型碳酸盐岩;按岩性可分为颗粒灰云岩、含膏灰云岩、泥晶灰云岩、纹层状灰云岩和角砾状灰云岩5种;储集空间存在孔、洞、缝等多种形式,孔径尺寸范围从纳米级到厘米级.岩性的多样性决定了储集空间具有多种尺度和多种成因,可将储层划分为白云石晶间孔型、溶蚀孔型、裂缝-角砾间孔(洞)型3类储层.晶间孔型储层形成于准同生期的白云石化作用,是咸化湖盆周期性咸化的必然结果,该类储层分布广,是湖相混积型碳酸盐岩储层的主要类型;溶蚀孔型储层是准同生期大气淡水溶解蒸发岩矿物的结果,优先发育于洼中古隆起内含膏灰云岩和颗粒灰云岩中,分布相对局限.裂缝-角砾间孔(洞)型储层为构造成因,产生于狮子沟断层沿膏盐层发生大规模逆冲、滑脱变形的过程中,呈连片分布.
Author 宫清顺
田明智
朱超
宋光永
龙国徽
王艳清
伍劲
李森明
AuthorAffiliation 中国石油杭州地质研究院,浙江杭州310023%中国石油青海油田分公司勘探开发研究院,甘肃敦煌736202
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LI Senming
GONG Qingshun
TIAN Mingzhi
SONG Guangyong
WU Jin
WANG Yanqing
LONG Guohui
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下干柴沟组上段
成储机制
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Title 柴达木盆地英西地区湖相混积型碳酸盐岩储层成因及发育模式
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