碳储深孔超声成像测井系统设计与应用

doi:10.11720/wtyht.2022.0061

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Abstract

Geothermal resources are widely distributed in the Beijing-Tianjin-Hebei region and the Xiong'an New Area and are mainly characterized by deep carbonate geothermal reservoirs. To achieve stable and increased production of geothermal reservoirs, it is effective to detect and evaluate the fracture parameters of reservoirs and analyze the distribution patterns of tectonic fractures in underground rock masses using the ultrasonic imaging logging technique. Targeting the high-temperature and high-pressure environment of deep carbonate geothermal reservoirs, this study developed an ultrasonic imaging logging system, which can be used under the conditions of well depth greater than 4,000 m, well diameter of 150~500 mm, temperature greater than 110℃, continuous operating time greater than 12 h, and pixels per meter of a geological well greater than 50,000. The equipment of this ultrasonic imaging logging system has been tested in well D22 in Xiong'an New Area. The test results show that the developed ultrasonic imaging logging system has a clear imaging effect and high identification degree of fractures and that its various performance indicators are comparable to those of advanced foreign equipment. Therefore, this system can provide an efficient technical method for identifying fractures and fractured zones and analyzing the occurrence of deep carbonate geothermal reservoirs.

Key words： deep carbonate geothermal reservoir ultrasonic imaging logging system Well D22 in Xiong'an fracture identification

Received: 16 February 2022 Published: 03 January 2023

ZTFLH:

P631

Corresponding Authors: YANG Zhuo-Jing E-mail: chegs_jianwei@st.btbu.edu.cn;277357053@qq.com

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	Jian-Wei ZHANG
	Zhuo-Jing YANG
	Xin-Jie WANG
	Sheng-Tao LI
	Yu-Jun ZHAO

Cite this article:

Jian-Wei ZHANG,Zhuo-Jing YANG,Xin-Jie WANG, et al. Design and application of the ultrasonic imaging logging system for deep carbonate geothermal reservoirs[J]. Geophysical and Geochemical Exploration, 2022, 46(6): 1500-1506.

URL:

https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.0061 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I6/1500

Schematic diagram of the logging system
1—technical vehicle for logging; 2—well logging ground control system;3—well logging armoured cable; 4—derrick; 5—ultrasonic imaging logging sensor; 6—wellhead

Schematic diagram of the ultrasound imaging logging sensor
1—sound image assembly unit;2—position monitoring unit;3—information acquisition and processing unit;4—data transmission unit; 5—DC power unit;6—electric connector;7—stainless steel housing;8—casing centralizer

Schematic diagram of the information acquisition and processing unit

Main technical parameters of the ultrasonic imaging device

The first logging image of the repetitive test

The second logging image of the repetitive test

Drilling fluid parameters

A logging image fragment of well D22

Comprehensive display diagram of the crack form

Statistics diagram of crack number

Core fragment of well D22(3 153.59~3 157.49 m)

A logging image fragment of well D22

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