Chinese Academy of Sciences

Other

Chunhe Yang

Hongwu Yin

Yuhao Zhang

Yinping Li

Hongling Ma

Xilin Shi

Tongtao Wang

Yintong Guo

Yue Han

Kai Liu

Rui Song

Yujia Song

Jianjun Liu

Shengnan Ban

Xiaosong Qiu

Haijun Mao

Weimin Wang

Xiaopeng Liang

Shuanglong Ding

Mancang Liu

Kai Zhao

Qingfeng Lu

Hejuan Liu

The application discloses a method and device for making a physical fault model and empirically evaluating its sealing performance. The method comprises S1 preparing a fault filling zone model; S2 testing the initial permeability of the fault filling zone model before sealing it with nano-microsphere infused slurry; S3 placing the fault filling zone model into reservoir rocks, drilling slurry injection wellbores in the reservoir rocks on both sides of the fault filling zone model, and creating a perforation section near the bottom of the slurry injection wellbore directed towards the fault filling zone model; subsequently, injecting nano-microsphere infused slurry into the slurry injection wellbore to perform a sealing experiment; S4 taking out the fault filling zone model after the slurrying process in S3 and repeating S2 to test the permeability of the model after sealing; and S5 calculating the sealing performance index of the fault filling zone model.

Method and device for making physical fault model and empirically evaluating sealing performance

Disclosed is a physical simulation experiment system for vapor-liquid multiphase seepage in an underground gas storage facility in a depleted gas reservoir, including: a rock sample sealing, heating, and insulation system, a triaxial stress and confining pressure loading system, an oil-gas-water injection and pore pressure supply system, a vapor-liquid-solid three-phase separation and measurement system, an optical micro/nanofiber gas detection and monitoring system, a distributed fiber optic sensing system, and a gas supply and leakage alarm system, where the rock sample sealing, heating, and insulation system is used for accommodating and heating a rock sample; and the oil-gas-water injection and pore pressure supply system performs oil-gas-water injection into the rock sample and pore pressure maintenance. The present application aims to overcome the bottleneck problem of evaluating the dynamic sealing integrity of underground gas storage under alternating loads caused by injection and withdrawal.

Physical simulation experiment system for vapor-liquid multiphase seepage in underground gas storage facility in depleted gas reservoir

Salt caverns with an inner container for storing electrical energy as a flow battery are provided. The salt caverns with an inner container for storing electrical energy as a flow battery comprises an air bag, a second pipeline and a first pipeline. The airbag is located in an underground salt cavern, the salt cavern is full of brine, and a liquid electrolyte is stored in the airbag. One end of the second pipeline is connected with the airbag while the other end thereof is located on the ground, and the second pipeline is used for filling the liquid electrolyte into the airbag. The first pipeline sleeves the second pipeline, one end of the first pipeline is connected with a shaft inlet of the salt cavern while the other end thereof is located on the ground, and the first pipeline is used for discharging the brine from the salt cavern.

Device for storing electrical energy of salt cavern flow battery

The disclosure provides a liquid taking device and a liquid taking method. The liquid taking device comprises a liquid taking bottle, a heavy ball and liquid taking ropes. The liquid taking bottle has a first mouth and a bottom opposite to the first mouth. The heavy ball is arranged in the liquid taking bottle. The liquid taking device can be controlled to reach different depths under the ground by the action of two liquid ropes. When the first mouth of the bottle is placed facing downward, the heavy ball blocks the first mouth of the bottle under its own gravity to prevent liquid leakage; when the first mouth of the bottle is turned upwards under the action of the liquid taking rope, the heavy ball falls onto the bottom of the bottle, such that an external liquid can flow into the liquid taking device, which has a good practical utility.

Liquid taking device and liquid taking method

The present invention discloses a device, system and method triaxial compression test with/without jacket by gas confining pressure on rock, and belongs to the technical field of rock mechanics tests. The device includes a container, wherein an accommodating cavity is disposed in the container for placing a core sample, a first through hole and a second through hole are respectively disposed at an upper end of the container, the first through hole is used for penetration of an end cap for loading an axial pressure to the core sample, the second through hole is used for injecting a gas into the accommodating cavity so as to apply a gas confining pressure on the core sample, a third through hole is disposed at a lower end of a side wall of the container, and the third through hole is used for communicating the accommodating cavity with the triaxial cell so as to achieve pressure transfer and balance between the accommodating cavity and the triaxial cell. During application, the device is installed in the triaxial cell. The container is inflated by a gas inlet and outlet of the triaxial cell and a communicating tube, the internal pressure applied by a high pressure gas on a near field rock wall of a salt cave can be accurately simulated, and a triaxial compression test with/without jacket by gas confining pressure on rock is conducted.

Device, system and method for triaxial compression test with/without jacket by gas confining pressure on rock

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Wuhan, China

Chunhe Yang