[1]周晓峰,李景,于均民,等.酒泉盆地营尔凹陷下沟组砂岩蒙皂石膜形成机制[J].新疆石油地质,2019,(02):168.[doi:10.7657/XJPG20190207]
 ZHOU Xiaofeng,LI Jing,YU Junmin,et al.Forming Mechanism of Smectite Coating of the Sandstones in Xiagou Formation of Yinger Sag, Jiuquan Basin[J].Xinjiang Petroleum Geology,2019,(02):168.[doi:10.7657/XJPG20190207]
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酒泉盆地营尔凹陷下沟组砂岩蒙皂石膜形成机制()
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《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

卷:
期数:
2019年02期
页码:
168
栏目:
出版日期:
2019-03-28

文章信息/Info

Title:
Forming Mechanism of Smectite Coating of the Sandstones in Xiagou Formation of Yinger Sag, Jiuquan Basin
文章编号:
1001-3873(2019)02-0168-06
作者:
周晓峰1李景2于均民1李淑琴2符国辉2盛思璐2许瑞2
(1.中国石油大学 a.油气资源与探测国家重点实验室;b.石油工程学院;c.石油工程教育部重点实验室,北京 102249;2.中国石油 玉门油田分公司 勘探开发研究院,甘肃 酒泉 735019)
Author(s):
ZHOU Xiaofeng1 LI Jing2 YU Junmin1 LI Shuqin2 FU Guohui2 SHENG Silu2 XU Rui2
(1.China University of Petroleum, a.State Key Laboratory of Petroleum Resources and Prospecting; b.School of Petroleum Engineering; c.MOE Key Laboratory of Petroleum Engineering, Beijing 102249, China; 2.Research Institute of Exploration and Development, Yumen Oilfield Company, PetroChina, Jiuquan, Gansu 735019, China)
关键词:
酒泉盆地营尔凹陷下沟组蒙皂石膜标型矿物大气水渗滤石英次生加大
Keywords:
Jiuquan basin Yinger sag Xiagou formation smectite coating typomorphic mineral atmospheric water percolation quartz secondary enlargement
分类号:
TE112.221
DOI:
10.7657/XJPG20190207
文献标志码:
A
摘要:
酒泉盆地营尔凹陷下沟组砂岩中以黏土膜形式赋存的蒙皂石是一种能够预测储集层物性的标型矿物。通过铸体薄片和扫描电镜技术对蒙皂石膜的赋存状态进行观察,研究其形成机制及对储集层物性的影响,为营尔凹陷下沟组油气勘探开发提供科学依据。研究表明,晶形差的蒙皂石以胶囊状依附在碎屑颗粒表面成为黏土膜,成膜物质来源于携带蒙皂石黏土微粒的下渗大气水,成膜时间为早成岩阶段A期的方解石胶结之后。蒙皂石膜与石英胶结物共生,石英胶结物以石英微粒散布或以石英次生加大边覆盖在蒙皂石膜表面。鉴于此,生长在孔隙壁上的蒙皂石膜不能抑制石英次生加大,其对砂岩孔隙的保存不具有建设性作用,但可以作为指示砂岩物性好坏的标型矿物。
Abstract:
The smectite whose occurrence is the clay coating in the sandstone of Xiagou formation in Ying’er sag is a kind of typomorphic mineral which can be used to predict reservoir physical properties. Using cast thin section analysis and SEM technology, the paper observes the occurrence of smectite coating and studies its forming mechanism and the influences on reservoir physical properties, in order to provide scientific basis for hydrocarbon exploration and development in Xiagou formation of Ying’er sag. The study shows that the smectite with poor crystal shapes adhered to the surface of clastic particles like capsules and became clay coating. The coating material came from the infiltrated atmospheric water carrying clay particles and the coating-forming time was after the calcite cementation during the early diagenesis stage A. Smectite coating coexists with quartz cements and the quartz cements are sparsely distributed or cover the surface of the smectite coating as the secondary enlarged edges of quartz. Therefore, the smectite coating growing on the wall of pores can’t inhibit the secondary enlargement of quartz, and make no contributions to the preservation of pores in sandstones, but it is a good typomorphic mineral to indicate physical properties of sandstones
更新日期/Last Update: 2019-03-28