US 11,982,182 B1
Devices and methods for testing retrograde condensation damage in near well zones of condensate gas reservoirs with high condensate content
Youwei He, Chengdu (CN); Shuai Qiu, Chengdu (CN); Jiazheng Qin, Chengdu (CN); Yong Tang, Chengdu (CN); Keji Long, Chengdu (CN); and Zhenhua Rui, Chengdu (CN)
Assigned to SOUTHWEST PETROLEUM UNIVERSITY, Chengdu (CN)
Filed by SOUTHWEST PETROLEUM UNIVERSITY, Sichuan (CN)
Filed on Nov. 29, 2023, as Appl. No. 18/523,833.
Claims priority of application No. 202211609535.X (CN), filed on Dec. 15, 2022.
Int. Cl. E21B 49/00 (2006.01); E21B 49/08 (2006.01); G01N 15/08 (2006.01)
CPC E21B 49/087 (2013.01) [G01N 15/0826 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A device for testing retrograde condensation damage in a near well zone of a condensate gas reservoir with a high condensate content, comprising: a long rock core holder, a first two-way valve, a second two-way valve, a first single-way valve, a second single-way valve, a third single-way valve, a fourth single-way valve, a first three-way valve, a second three-way valve, a third three-way valve, a confining pressure pump, a confining pressure gauge, a vacuum pump, a high-pressure high-precision displacement pump, a first intermediate container, an outlet pressure gauge, a displacement pump, a back pressure valve, a gas meter, a second intermediate container, an inlet pressure gauge, a test tube, a constant temperature oven, a gas flowmeter, a gas chromatograph, a six-way valve, a sample preparation device, and a thermostatic chamber, wherein
the high-pressure high-precision displacement pump, the sample preparation device, the second intermediate container, and the first intermediate container are all connected to the six-way valve; the second intermediate container, the first intermediate container, and the six-way valve are located inside the constant temperature oven; the third three-way valve is connected to the long rock core holder; the first single-way valve is connected to the sample preparation device and is also connected to the third three-way valve through the first three-way valve and the second three-way valve; the second single-way valve is connected to the second intermediate container and is also connected to the third three-way valve through the first three-way valve and the second three-way valve; the third single-way valve is connected to the first intermediate container and is also connected to the third three-way valve through the second three-way valve; the inlet pressure gauge, the confining pressure gauge, the outlet pressure gauge, the first two-way valve, and the fourth single-way valve are all connected to the long rock core holder and are located inside the constant temperature oven; the vacuum pump is connected to the third three-way valve and is located outside the constant temperature oven; the confining pressure pump is connected to the first two-way valve and is located outside the constant temperature oven; the back pressure valve, the gas flowmeter, and the test tube are connected in sequence and are all located inside the thermostatic chamber; the back pressure valve is connected to the fourth single-way valve; the second two-way valve is connected to the back pressure valve and is located inside the thermostatic chamber; the displacement pump is connected to the second two-way valve and is located outside the thermostatic chamber; the gas meter is connected to the test tube and is located outside the thermostatic chamber; and the gas chromatograph is connected to the gas meter and is located outside the thermostatic chamber.