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科技导报
| 综述文章 2016, 34(2): 110-115
鄂尔多斯盆地中东部二叠系山西组2段沉积环境及砂体展布
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阳伟1,2 , 王峰1
作者信息
1. 成都理工大学沉积地质研究院, 成都 610059;
Sedimentary environments and sandbody distribution in member 2 of Permian Shanxi formation in mid-eastern Ordos Basin
Affiliations
出版时间: 2016-01-28
doi: 10.3981/j.issn.1000-7857.2016.2.017
文章导航
鄂尔多斯盆地中东部下二叠统山西组2 段为重要的勘探层位和主力产气层。在野外露头分析、岩心观察、测井资料综合解释以及地球化学分析的基础上,研究认为山西组2 段早中期研究区受海相作用影响,山32、山22 期发育河控-潮控三角洲,其三角洲平原包括分流河道、废弃河道、泥炭沼泽和分流间洼地,三角洲前缘包括水下分流河道、河口坝、远砂坝、潮汐砂坝、分流间湾等沉积微相;山12期海水沿东南方向推出鄂尔多斯盆地,研究区在陆相湖泊背景上发育河控-湖泊三角洲。古地理条件的不同使其砂体类型及储集性能也有一定的差异,其中米脂-子洲及塔湾-高桥地区山32段储集砂体受海相环境改造彻底,在岩性特征、砂体厚度以及储集性能方面更具优越性,为天然气勘探的有利目标区。
沉积环境
/
砂体展布
/
山2 段
/
鄂尔多斯盆地
The member 2 of Lower Permian Shanxi formation is a main gas-producing reservoir and an important layer for exploration in the mid-eastern Ordos Basin. Outcrop analysis, core observation, comprehensive logging data interpretation and geochemical analysis suggest that the study area was affected by Marine facies at the early-middle stage of member 2 of Shanxi formation. It developed a rivertide controlled delta at the 2 and 3 sub-member of member 2 of Shanxi formation. The delta plain included distributary channel, abandoned channel, peat swamps and interdistributary depression. The delta front included sedimentary micro-facies, such as underwater distributary channel, mouth bar, distal bar, tide sand dam, and interdistributary bay. Seawater pushed out along the southeast Ordos Basin in the age of the 1 sub-member of member 2 of Shanxi formation. The study area developed a river controlled-lake delta on the background of terrestrial lakes. The differences of ancient geographical conditions lead to the different types of sand and reservoir properties. The reservoir sand in the 3 sub-member of member 2 of Shanxi formation was changed by the marine facies completely in the Mizhi-Zizhou and Tawan-Gaoqiao area. It has more advantages in lithologic characteristics, sand thickness and reservoir performance, which are favorable for gas exploration.
sedimentary environments
/
sand-body distribution
/
member 2 of Shanxi formation
/
Ordos Basin
阳伟, 王峰.
鄂尔多斯盆地中东部二叠系山西组2段沉积环境及砂体展布.
科技导报,
2016
, 34
(2)
: 110
-115
.
DOI: 10.3981/j.issn.1000-7857.2016.2.017
YANG Wei, WANG Feng.
Sedimentary environments and sandbody distribution in member 2 of Permian Shanxi formation in mid-eastern Ordos Basin[J].
Science & Technology Review ,
2016
, 34
(2)
: 110
-115
.
DOI: 10.3981/j.issn.1000-7857.2016.2.017
2016年第34卷第2期
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文章信息
doi: 10.3981/j.issn.1000-7857.2016.2.017
接收时间：2014-12-02
首发时间：2016-02-04
出版时间：2016-01-28
收稿日期：2014-12-02
修回日期：2015-09-10
https://castjournals.cast.org.cn/joweb/kjdb/CN/10.3981/j.issn.1000-7857.2016.2.017
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2种不同金属材料的力学参数
科 属数 种数 占总种数比例 属 种数 占总种数比例 鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78 小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39 多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39 红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87 小菇属 Mycena 11 5.26 光柄菇属 Pluteus 5 2.39 红菇属 Russula 17 8.13 栓菌属 Trametes 5 2.39
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