公开(公告)号：US20220290561A1

公开(公告)日：2022-09-15

申请号：US17394071

申请日：2021-08-04

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Ping GUO ,  Zhouhua WANG ,  Yijian CHEN ,  Bowen SUN ,  Chao DONG ,  Yisheng HU ,  Shuoshi WANG

IPC: E21B49/08 ,  E21B49/00 ,  G01N30/02 ,  G01N33/28 ,  G01N33/24

Abstract: The invention relates to a device for testing the three-phase saturation of oil, gas and water in a high-temperature and high-pressure planar model, comprising a displacement pump 1, a confining pressure pump 2, a back pressure pump 3, containers, a planar model system 21, a data acquisition system 22, a back pressure valve 23 and an oil-gas separator 24. The planar model system includes a planar model 27, an autoclave body 31, a heating temperature-controlling system 34, a Y-axis direction stepping motor 35, a X-axis direction stepping motor 36 and an acoustoelectric detector 41. A method for testing the three-phase saturation of oil, gas and water by using the device includes: calibrating three-phase saturation of oil, gas and water to a rock core, preparing a formation water sample and a crude sample, regaining the original formation conditions of the planar model, simulating the depletion or displacement process of oil reservoirs, performing linear ultrasonic-and-resistivity-scanning test on planar model, determining the three-phase saturation distribution of oil, gas and water in the planar model. The invention has simple operation and intuitive measurement, and provides tools and means for testing the three-phase saturation of oil, gas and water during the depletion or displacement development of oil-gas reservoirs.

公开(公告)号：US20230366869A1

公开(公告)日：2023-11-16

申请号：US18130924

申请日：2023-04-05

Applicant: Southwest Petroleum University

Inventor： Shuoshi WANG ,  Wenhua ZHAO ,  Ping GUO ,  Zhouhua WANG ,  Jianfen DU ,  Yisheng HU ,  Huang LIU

IPC: G01N33/28

CPC classification number: G01N33/28

Abstract: A Hydrophilic-Lipophilic Deviation theory-based method is provided to prepare representative degassed oil with equivalent minimum miscible pressure to live oil. The method can reduce the number of trial and error type experiments during the representative degassed oil preparation process by measuring the MMP and EACN for dead and live oil. The representative degassed oil formulation could be easily predicted after determining the required MMP and EACN values. The prepared oil can reflect the key mechanism of multiple contact miscible mechanism in the process of gas flooding more accurately. It allows experiments that are inconvenient to use live oil to consider the mechanism of multiple contact miscibility easily.

公开(公告)号：US20240219329A1

公开(公告)日：2024-07-04

申请号：US18167712

申请日：2023-02-10

Applicant: Southwest Petroleum University

Inventor： Ping GUO ,  Zheng GU ,  Shuoshi WANG ,  Zhouhua WANG ,  Qinglong XU ,  Shiyong HU ,  Wenhua ZHAO ,  Yisheng HU ,  Huang LIU ,  Hanmin TU

IPC: G01N24/08 ,  G01N1/42 ,  G01N1/44

CPC classification number: G01N24/081 ,  G01N1/42 ,  G01N1/44

Abstract: A method for determining a phase-state type and saturation of a fluid by an NMR technology includes putting a core to be measured to an NMR phase-state testing device, injecting a heavy water solution from both ends of a gripper at the same time until the core reaches the formation pressure, and stopping; scanning the core to obtain a two-dimensional NMR map, and determining whether the core contains a gas phase; reducing the temperature of the gripper, and collecting an oil phase volume, a gas phase volume and a water phase volume discharged from the core; purge the pipelines out with nitrogen, collecting a water phase volume and an oil phase volume in the pipelines; performing dry distillation on the core to obtain an oil phase volume and a water phase volume; and obtaining the saturations of various phases according to the fluid volumes of multiple phases in the core.