鄂尔多斯盆地古生界气藏成藏模式及优势储层预测

李浩

doi:10.3969/j.issn.1006-6535.2022.02.008

特种油气藏 >

2022 , Vol. 29 >Issue 2: 57 - 63

DOI: https://doi.org/10.3969/j.issn.1006-6535.2022.02.008

地质勘探

鄂尔多斯盆地古生界气藏成藏模式及优势储层预测

李浩

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陕西学前师范学院,陕西西安 710100

李浩(1986—),男,工程师,2010年毕业于长江大学资源勘察工程专业,2015年毕业于西北大学矿产普查与勘探专业,获博士学位,现主要从事油气地质综合研究工作。

收稿日期: 2021-06-06

修回日期: 2022-01-04

网络出版日期: 2023-01-10

基金资助

国家科技重大专项“鄂尔多斯盆地大型岩性地层油气藏勘探开发示范工程”(2016ZX05050);国家自然科学基金“鄂尔多斯盆地致密气充注动力与富集规律研究”(42162015)

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Accumulation Pattern and Favorable Reservoir Prediction of Paleozoic Gas Reservoirs in Ordos Basin

Li Hao

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Shaanxi Xueqian Normal University, Xi′an, Shaanxi 710100, China

Received date: 2021-06-06

Revised date: 2022-01-04

Online published: 2023-01-10

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摘要

鄂尔多斯盆地延长气田天然气勘探起步较晚,古生界气藏隐蔽性较强,勘探难度较大。为探究该地区气藏成藏模式,以沉积学原理为基础,从地层分布、构造特征、沉积相、储层主控因素等方面研究了延长气田南部地区古生界天然气成藏特征及富集规律。研究表明:延长气田相对优质储层是天然气成藏与富集的关键,储层规模决定气藏规模;优质储层发育主要受古地貌、岩石类型和后期成岩作用控制:优质储层主要发育在三角洲分流河道、河口坝中,富石英质沉积体系天然气富集程度较高。该研究成果对延长气田古生界气藏勘探开发具有重要指导意义。

关键词： 气藏; 成藏主控因素; 富集规律; 致密储层; 鄂尔多斯盆地; 延长气田

本文引用格式

李浩 . 鄂尔多斯盆地古生界气藏成藏模式及优势储层预测[J]. 特种油气藏, 2022 , 29(2) : 57 -63 . DOI: 10.3969/j.issn.1006-6535.2022.02.008

Abstract

Natural gas in Yanchang Gas Field Ordos Basin was explored relatively late. Paleozoic gas reservoir is buried deeply and difficult to explore. In order to explore the accumulation pattern of gas reservoirs in this area, the accumulation characteristics and enrichment pattern of Paleozoic gas reservoirs in the south of Yanchang Gas Field were studied in terms of stratigraphic distribution, tectonic features, sedimentary facies and reservoir controlling factors based on sedimentological principles. The study showed that the relatively high-quality reservoirs in Yanchang Gas Field were the key to natural gas formation and enrichment, and the reservoir size determined the scale of the gas reservoir; the development of high-quality reservoirs was mainly controlled by paleo-geomorphology, rock type and late diagenesis; high-quality reservoirs were mainly developed in deltaic distributary channels and estuary dams, and the quartz-rich sedimentary system was high in natural gas enrichment. There is much for reference of the study results to the exploration and development of Paleozoic gas reservoirs in Yanchang Gas Field.

Key words： gas reservoir; key controlling factors for hydrocarbon accumulation; enrichment law; tight reservoir; Ordos Basin; Yanchang Gas Field

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