玛西斜坡上三叠统白碱滩组三段沉积相及油气勘探意义

doi:10.3969/j.issn.1006-6535.2021.03.001

特种油气藏 ›› 2021, Vol. 28 ›› Issue (3): 1-8.DOI: 10.3969/j.issn.1006-6535.2021.03.001

• 地质勘探 • 下一篇

玛西斜坡上三叠统白碱滩组三段沉积相及油气勘探意义

武鑫¹, 胡晓云¹, 韩磊¹, 徐欣¹, 彭学红¹, 梁涛¹, 曾玉兰¹, 李维锋²

1.中国石油新疆油田分公司,新疆克拉玛依 834000;
2.长江大学,湖北武汉 430100

收稿日期:2020-07-16 修回日期:2021-03-11 出版日期:2021-06-25 发布日期:2022-02-16
通讯作者: 李维锋(1960—),男,教授,1982年毕业于山东科技大学煤田地质学专业,2000年毕业于成都理工大学古生物与地层学专业,获博士学位,现从事沉积学研究工作。
作者简介:武鑫(1983—),男,高级工程师,2005年毕业于中国石油大学(北京)地质工程专业,现从事沉积储层与油气田开发工作。
基金资助:
国家自然科学基金“陆相湖盆大面积扇三角洲相砾岩的发育特征及来自古气候的影响:以准噶尔盆地玛湖凹陷三叠系百口泉组为例”(41872118);国家科技重大专项“准噶尔盆地岩性地层油气藏分布规律与目标评价”(2017ZX05001-004)

Sedimentary Facies of Member 3 of the Upper Triassic Baijiantan Formation in the Western Slope Area of Mahu Sag and Its Significance for Hydrocarbon Exploration

Wu Xin¹, Hu Xiaoyun¹, Han Lei¹, Xu Xin¹, Peng Xuehong¹, Liang Tao¹, Zeng Yulan¹, Li Weifeng²

1. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China;
2. Yangtze University, Wuhan, Hubei 430100, China

Received:2020-07-16 Revised:2021-03-11 Online:2021-06-25 Published:2022-02-16

摘要/Abstract

摘要： 为填补玛西斜坡白碱滩组在沉积学方面的空白,综合运用岩心、测井及分析化验等资料,对白碱滩组三段的沉积相进行了研究。结果表明:目的层属于辫状河三角洲相,共识别出辫状河三角洲前缘和前三角洲2个亚相,以及水下分流河道、支流间湾、河口砂坝、远砂坝及前三角洲泥等5个微相;在浅水沉积背景下,研究区内发育了来自西北和东北2个物源方向的辫状河三角洲前缘朵体,该前缘朵体自底部T₃b₃⁴小层到顶部T₃b₃¹小层沉积时期,持续向湖盆中心方向不断进积;在T₃b₃²和T₃b₃¹小层沉积时期,水下分流河道和河口砂坝砂体在研究区内大面积分布,由于其具有良好的内在储集物性条件和外在的构造圈闭与油气充注条件,可作为研究区后续油气勘探的首要目标。研究成果可为研究区白碱滩组未来的油气勘探提供有力的理论支撑。

关键词: 辫状河三角洲, 沉积相, 白碱滩组三段, 油气勘探, 玛湖凹陷

Abstract: In order to fill the gap in sedimentology of Baijiantan Formation in the western slope area of Mahu Sag, the sedimentary facies of Member 3 of Baijiantan Formation were studied with core, logging, and analytical and test data. The results showed that the target layer was of the braided river delta facies, two subfacies (delta front and prodelta) and five microfacies (underwater distributary channel, inter-tributary bays, channel mouth bar, distal bar, and prodelta mud) were identified; under the background of shallow-water deposit, there were braided river delta-front lobes developed in two provenance directions in northwest and northeast in the study area; during the period of deposition from T₃b₃⁴ sublayer at the bottom to T₃b₃¹ sublayer at the top, the front lobe continued to accumulate towards the center of the lake basin; during the deposition period of T₃b₃² and T₃b₃¹ sublayers, underwater distributary channel and underwater distributary channel were widely distributed in the study area and could be used as the primary targets for subsequent oil and gas exploration in the study area due to their excellent internal storage reservoir physical properties and external structural traps and hydrocarbon charging conditions. The study results can provide strong theoretical support for future oil and gas exploration of Baijiantan Formation in the study area.

Key words: braided river delta, sedimentary facies, Member 3 of Baijiantan Formation, oil and gas exploration, Mahu Sag

中图分类号:

TE122.1

武鑫, 胡晓云, 韩磊, 徐欣, 彭学红, 梁涛, 曾玉兰, 李维锋. 玛西斜坡上三叠统白碱滩组三段沉积相及油气勘探意义[J]. 特种油气藏, 2021, 28(3): 1-8.

Wu Xin, Hu Xiaoyun, Han Lei, Xu Xin, Peng Xuehong, Liang Tao, Zeng Yulan, Li Weifeng. Sedimentary Facies of Member 3 of the Upper Triassic Baijiantan Formation in the Western Slope Area of Mahu Sag and Its Significance for Hydrocarbon Exploration[J]. Special Oil & Gas Reservoirs, 2021, 28(3): 1-8.

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玛西斜坡上三叠统白碱滩组三段沉积相及油气勘探意义

Sedimentary Facies of Member 3 of the Upper Triassic Baijiantan Formation in the Western Slope Area of Mahu Sag and Its Significance for Hydrocarbon Exploration

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