俄罗斯伏尔加—乌拉尔盆地Domanik相页岩地质特征与有利区预测

doi:10.3969/j.issn.1672-7703.2025.02.005

摘要/Abstract

摘要： Domanik相页岩是俄罗斯伏尔加—乌拉尔盆地内非常规油气资源的重要组成部分。本研究系统探讨了Domanik细粒富有机质碳酸盐岩的地质特征、生烃潜力及其非常规资源开发前景。通过综合地层学、岩石学、地球化学和储层物性数据特征分析，并与结合钻井及勘探数据相结合，对Domanik相的分布、厚度、有机质丰度及热成熟度等关键参数进行了系统研究。研究结果表明，Domanik相主要形成于于上泥盆世至下石炭世期间， Domanik烃源岩以富含II 型干酪根为主要特征，总有机碳（TOC）含量介于1%~20%，热成熟度（R_o）分布在0.5%~1.15%，并呈现从西向东逐渐增大的趋势。储层特征主要表现为粒间孔、微裂缝和透镜状有机质孔，脆性矿物含量较高，平均脆性指数为0.9，适合压裂改造。Domanik烃源岩形成于东欧地台沉降期，并在卡马—基尼尔裂谷系统内的海退期形成并在厌氧环境下保存。在埋深超过1000m、烃源岩净厚度大于5m的地区，具有良好的非常规油气资源潜力。本研究为该地区非常规资源的勘探和开发提供了重要的理论支持。

关键词: 伏尔加-乌拉尔盆地, Domanik相, 非常规油气资源, 泥盆系烃源岩, 硅质碳酸盐岩

Abstract: The Domanik facies shale represents a critical component of unconventional hydrocarbon resources in the Volga-Ural Basin,Russia. This study systematically explores the geological characteristics, hydrocarbon generation potential, and development prospects of the fine-grained, organic-rich carbonate rocks within the Domanik facies. By integrating stratigraphy, petrology, geochemistry, and reservoir properties with drilling and exploration data, this paper comprehensively evaluates key parameters such as the distribution, thickness, organic mattercontent, and thermal maturity of the Domanik source rocks. The results demonstrate that the Domanik facies predominantly deposited during the Upper Devonian to Lower Carboniferous period. The source rocks are rich in Type II kerogen, with total organic carbon (TOC) content rangeing from 1% to 20%, and thermal maturity (R_o) varying from 0.5% to 1.15%, exhibiting a eastward-increasing trend. The reservoir properties are dominated by intergranular pores, microfractures, and lens-shaped organic matter pores, with a high content of brittle minerals and an average brittleness index of 0.9, which is favorable for hydraulic fracturing. The Domanik source rocks were deposited during the subsidence of the East European Platform and preserved within the Kama-Kinel trough system under anoxic conditions during a regressive phase. The facies exhibits significant potential for unconventional hydrocarbon resources, particularly in the area where source rocks exceed 1,000 meters in burial depths and have a net thicknesses greater than 5 meters. These findings provide a robust theoretical framework to support future exploration and development of unconventional hydrocarbon resources in the Volga-Ural Basin.

Key words: Volga-Urals Basin, Domanik deposits, Unconventional resources, Devonian source rock, Siliceous carbonate rock

中图分类号:

TE122.1

杨光庆, 弓明月, 史丹妮, 张忠民, 王桐, 刘静静, 吴蓝宇, 曹喆, 李晋. 俄罗斯伏尔加—乌拉尔盆地Domanik相页岩地质特征与有利区预测[J]. 中国石油勘探, 2025, 30(2): 54-68.

Yang Guangqing, Gong Mingyue, Shi Danni, Zhang Zhongmin, Wang Tong, Liu Jingjing, Wu Lanyu, Cao Zhe, Li Jin. Geological Characteristics and Favorable Area Prediction of Domanik Facies Shale in the Volga-Urals Basin, Russia[J]. China Petroleum Exploration, 2025, 30(2): 54-68.

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