鄂尔多斯盆地渭北地区上三叠统延长组长6 油层沉积微相特征研究

李庆忠

doi:10.3969/j.issn.1673-8926.2008.03.014

岩性油气藏 >

2008 , Vol. 20 >Issue 3: 69 - 73

DOI: https://doi.org/10.3969/j.issn.1673-8926.2008.03.014

油气地质

鄂尔多斯盆地渭北地区上三叠统延长组长6 油层沉积微相特征研究

李庆忠

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1.成都理工大学沉积地质研究院; 2.成都理工大学“油气藏地质及开发工程”国家重点实验室

阳伟, 1983 年生, 男, 在读硕士, 专业方向沉积学。地址: ( 610059) 四川成都理工大学沉积地质研究院。E-mail: yw110mm@yahoo.cn

网络出版日期: 2008-09-15

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Characteristics of sedimentary microfacies of Upper Triassic Chang 6 reservoir in Weibei area of Ordos Basin

LI Qingzhong

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(1. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China; 2. State Key Laboratory ofOil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China

Online published: 2008-09-15

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摘要

鄂尔多斯盆地渭北地区延长组长6 油层组主要为灰色细砂岩、粉砂岩沉积。在岩心、测井、单井相及测试资料分析的基础上, 对研究区上三叠统长6 油层组的沉积微相特征及各小层沉积微相平面展布特征进行了深入系统的研究。结果表明: 渭北地区长6 油层主要为辫状河三角洲前缘沉积和浊流沉积, 辫状河三角洲前缘主要包括水下分流河道、河口坝、远砂坝、席状砂和分流间湾等微相。研究成果为有利储集相带的预测及下一步的勘探奠定了基础。

关键词： 砂泥岩互层; 地震勘探; 垂向分辨率; 模型; 岩性油气藏

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李庆忠 . 鄂尔多斯盆地渭北地区上三叠统延长组长6 油层沉积微相特征研究[J]. 岩性油气藏, 2008 , 20(3) : 69 -73 . DOI: 10.3969/j.issn.1673-8926.2008.03.014

Abstract

Chang 6 reservoir of Yanchang Formation in Weibei area is mainly composed of gray fine sandstone and siltstone. Based on core observation, single well facies and logging data analysis, the characteristics of sedimentary microfacies and the distribution ofmicrofacies in each sublayer ofUpper Jurassic are systematically studied. The results show that braided river delta front and turbidite are the main deposits in Chang 6 reservoir in Weibei area. The subaqueous distributary channel, mouth bar, distal bar, sand sheet and interdistributary bay are the main sedimentary microfacies of the braided river delta front. The study results settle a strong base for the prediction of favorable reservoir facies belts and the further exploration.

Key words： sand shale interbed’ seismic exploration’ vertical resolution’ model’ lithologic reservoirs

参考文献

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