US 12,013,328 B2
Systems and methods for analyzing natural gas flow in subterranean reservoirs
Huangye Chen, Cypress, TX (US); and Hui-Hai Liu, Katy, TX (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Oct. 12, 2021, as Appl. No. 17/450,566.
Application 17/450,566 is a division of application No. 16/432,473, filed on Jun. 5, 2019, granted, now 11,175,211.
Claims priority of provisional application 62/680,812, filed on Jun. 5, 2018.
Prior Publication US 2022/0026337 A1, Jan. 27, 2022
Int. Cl. G01N 15/08 (2006.01); E21B 49/02 (2006.01); G01N 33/24 (2006.01)
CPC G01N 15/0826 (2013.01) [E21B 49/02 (2013.01); G01N 33/24 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of obtaining dual-continuum characteristic comprising:
placing a reservoir sample in a sample holder, where the sample is fluidly connected to an upstream gas reservoir and a downstream gas reservoir;
filling the upstream gas reservoir, the downstream gas reservoir, and the sample with a gas to a gas pressure such that the gas pressure in the upstream gas reservoir, the downstream gas reservoir and the sample is uniform;
closing an upstream valve, where closing the upstream valve isolates the upstream gas reservoir from both the downstream gas reservoir and the sample;
closing a downstream valve, where closing the downstream valve isolates the downstream gas reservoir from both the upstream gas reservoir and the sample;
increasing the pressure in the upstream gas reservoir to a test pressure;
opening the upstream valve at the same time a pulse pressure is transported from the upstream reservoir to the downstream reservoir by passing through the sample;
measuring pressure as a function of time in the upstream gas reservoir and in the downstream gas reservoir to obtain pulse decay test data; and
obtaining dual-continuum characteristics from the pulse decay test data.