东西伯利亚地台文德系海陆过渡相沉积特征及开发潜力

doi:10.3969/j.issn.1006-6535.2020.05.003

特种油气藏 ›› 2020, Vol. 27 ›› Issue (5): 14-21.DOI: 10.3969/j.issn.1006-6535.2020.05.003

东西伯利亚地台文德系海陆过渡相沉积特征及开发潜力

张宇焜¹, 杨烁¹, 郭晓², 王帅¹, 王晖¹, 宋来明¹

1.中海油研究总院有限责任公司,北京 100028;
2.中国海洋石油国际有限公司,北京 100028

收稿日期:2020-01-09 修回日期:2020-07-01 出版日期:2020-10-25 发布日期:2022-02-18
作者简介:张宇焜(1986—),男,高级工程师,2007年毕业于长江大学石油工程专业,2010年毕业于该校矿物学、岩石学、矿床学专业,获硕士学位,现主要从事油藏描述工作。
基金资助:
国家科技重大专项“油砂SAGD开发地质油藏评价及方案优化技术”(2016ZX05031-003)

Sedimentary Characteristics and Development Potential of Vendian Transitional Facies in East Siberian Platform

Zhang Yukun¹, Yang Shuo¹, Guo Xiao², Wang Shuai¹, Wang Hui¹, Song Laiming¹

1. CNOOC Research Institute Co., Ltd, Beijing 100028, China;
2. CNOOC International Ltd, Beijing 100028, China

Received:2020-01-09 Revised:2020-07-01 Online:2020-10-25 Published:2022-02-18

摘要/Abstract

摘要： 东西伯利亚地台文德系碎屑岩储层是俄罗斯未来油气开发重要增长点,但该区储层年代久远且地质特征复杂,开发难度较大。通过沉积特征分析,结合生产动态特征可以确定开发优势储层。针对研究区储层地质特征,结合岩心和薄片资料综合分析,识别出目标油田下文德统涅帕组的8类典型岩相,划分出沉积期内受周期性海侵作用而形成的3套海侵地层单元和2套海退地层单元,建立平面上由冲积扇过渡至障壁海岸的海陆过渡相沉积模式,确定了冲积扇、潮坪、障壁岛、潟湖等主要沉积相类型的平面分布特征和不同时期的沉积变化规律。结合油田试采情况和物理模拟实验,明确冲积扇和障壁岛这2类开发优势沉积相,论证通过低矿化度水驱改善储层渗透性的可行性。该研究可为此类海陆过渡相碎屑岩储层的勘探与开发提供地质依据。

关键词: 沉积特征, 海陆过渡相, 碎屑岩, 东西伯利亚地台, 文德系

Abstract: The Vendian clastic reservoirs in the East Siberian Platform are an important growth point of oil and gas development in Russia in the future. However, the reservoirs in this area have a long geologic history and complicated geological characteristics, which makes them difficult to develop. Through the analysis of sedimentary characteristics and production performance characteristics, the predominant development reservoirs can be determined. According to the reservoir geological characteristics of the study area, combined with the comprehensive analysis of cores and thin section data, eight types of typical lithofacies are identified in the Lower Vendian Nepa Formation in the target oilfield; three sets of transgressive stratigraphic units and two sets of regressive stratigraphic units formed by periodic transgression during the sedimentary period are divided; a model of transitional facies from alluvial fan to barrier coast on plane is established; the plane distribution characteristics and sedimentary change rules in different periods of the main types of sedimentary facies (such as alluvial fan, tidal flat, barrier island and lagoon) are determined. Based on the production test and physical simulation experiment results, two types of predominant sedimentary facies (alluvial fan and barrier island) are identified; the feasibility of improving reservoir permeability by low-salinity water flooding is demonstrated. This study can provide geological basis for the exploration and development of this kind of clastic reservoirs in transitional facies.

Key words: sedimentary characteristics, transitional facies, clastic rock, East Siberian Platform, Vendian

中图分类号:

TE122

张宇焜, 杨烁, 郭晓, 王帅, 王晖, 宋来明. 东西伯利亚地台文德系海陆过渡相沉积特征及开发潜力[J]. 特种油气藏, 2020, 27(5): 14-21.

Zhang Yukun, Yang Shuo, Guo Xiao, Wang Shuai, Wang Hui, Song Laiming. Sedimentary Characteristics and Development Potential of Vendian Transitional Facies in East Siberian Platform[J]. Special Oil & Gas Reservoirs, 2020, 27(5): 14-21.

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东西伯利亚地台文德系海陆过渡相沉积特征及开发潜力

Sedimentary Characteristics and Development Potential of Vendian Transitional Facies in East Siberian Platform

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