Chongqing Institute of Geology and Mineral Resources

Chongqing University

Chongqing Huadi Resources Environment Technology Co., Ltd

Jiankun Zhou

Zhaohui Lu

Pei He

Yunzhong Jia

Jiren Tang

Jianqiang Zhang

Xiaozhong Guo

Liming Ouyang

Yiyu Lu

Yanling Huang

Jinxi Wang

Ye Zhang

An experimental system for a pulsed displacement and replacement of methane with carbon dioxide is provided. The experimental system includes a gas supply system, a pulse control system, a reservoir environment simulation system, a data acquisition and processing system and a tail gas recovery system, connected in sequence; and the carbon dioxide output from the gas supply system is converted into a pulsed gas through the pulse control system, the pulsed gas enters the reservoir environment simulation system to shorten a time of displacing and replacing methane with carbon dioxide, the experimental data of the reservoir environment simulation system is recorded in real time, analyzed and processed by the data acquisition and processing system, a dynamic displacement process is reflected in real time, and a relationship between a displacement evaluation indicator and a displacement time is clarified. The disclosure further provides an experimental evaluation method, using the above experimental system.

Experimental system and experimental evaluation method for pulsed displacement and replacement of methane with carbon dioxide

An induced earthquake evaluation method for hydraulic fracturing activated faults includes obtaining an induced earthquake evaluation unit, cumulative injection equivalent energy, induced earthquake probability of fault type, induced earthquake probability of fault distance, hydraulic fracturing fluid diffusion capacity in fractured formation, new effective fault stress after fracturing, formation fluid pressure change rate and cumulative released equivalent energy. The probability of induced earthquake by hydraulic fracturing can be obtained. The induced earthquake possibility of each evaluation unit or single well under different stages of hydraulic fracturing, different construction injection methods and production conditions can be quantitatively evaluated. The method provides a quantitative result that can provide data support for optimizing hydraulic fracturing and reducing induced earthquake hazards.

Induced earthquake evaluation method for hydraulic fracturing activated faults

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Chongqing, China

Jiankun Zhou