Quantitative Characterization of Fractures under Volcanic Thermal Expansion Based on Thermal-Mechanical Coupling Analysis

被引：1
|
作者：
Tan Z. [1 ]
Deng J. [1 ]
Zhang X. [2 ]
Guo M. [1 ]
Li H. [2 ]
Du H. [3 ]
Feng J. [3 ]
机构：
[1] Tianjin Branch of CNOOC Limited, Tianjin
[2] CNOOC EnerTech-Drilling & Production Co．, Tianjin
[3] School of Geosciences, China University of Petroleum, Qingdao
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2023年 / 48卷 / 07期
关键词：
Bozhong 34-9 oil field; petroleum geology; quantitative fracture prediction; thermal coupling; thermal expansion; volcano;
D O I：
10.3799/dqkx.2022.110
中图分类号：
学科分类号：
摘要：
The Bonan region is a hot spot for oil and gas exploration and development in the Bohai Sea area in recent years. Though the Cenozoic volcanic activity provides advantageous conditions for oil and gas reservoir formation, it also poses a problem for oil and gas field development. The internal non-homogeneous, high-temperature and intense volcanic channels have affected the fracture development of the surrounding strata, triggering serious fractured well leaks resulted in huge economic losses. Based on the logging, core and seismic data, we identify the petrographic characteristics of the volcanic rocks and analyze the fracture development of the surrounding strata. The boundary conditions of the temperature field of volcanic activity are determined by means of core mineral analysis and thin section observation. In addition, applying the principle of thermodynamic coupling and the finite element numerical simulation method, the thermal expansion fractures of rocks caused by volcanic activity are quantitatively predicted, based on the law of energy conservation and geomechanics. Based on the thermodynamic coupling analysis of the influence range of volcanic channels on perimeter fracture development, the results have important reference values for drilling safety and volcano-related reservoir prediction in Bohai oil fields. © 2023 China University of Geosciences. All rights reserved.
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页码：2665 / 2677
页数：12
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