Deriving the Oil-Water Seepage Pressure Distribution from Two-Phase Oil-Water Flow Stress Gradient
- Авторлар: Tianjin Z.1, Xinping Y.2, Xuecheng Y.3, Zhongming L.4
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Мекемелер:
- College of Petrol and Environmental Engineering, Yan’an University
- Petroleum Exploration and Development Institute, Xinjiang oilfield
- Gras Production Plant 2 of Changqing Company
- Research Institute of Petroleum Exploration and Development, Chuanqing Oilfield Company
- Шығарылым: Том 55, № 2 (2019)
- Беттер: 199-205
- Бөлім: Article
- URL: https://journals.rcsi.science/0009-3092/article/view/235814
- DOI: https://doi.org/10.1007/s10553-019-01021-9
- ID: 235814
Дәйексөз келтіру
Аннотация
The characteristics of oil-water two-phase flow in low-permeability reservoirs have been insufficiently studied. In the present article, we estimate the oil-water seepage parameters using a flow stress gradient model with a nonuniform radial distribution of the water saturation coefficient in a low-permeability reservoir. We apply the oil-water relative permeability curves and the Buckley-Leverett equation to determine the oil-water mobility ratio and the functional relationship between the two-phase flow stress gradient, the radial distribution, and the oil saturation. In this way, we construct an oil-water radial flow model based on the oil-water two-phase flow stress to derive the pressure distribution equation. Calculation results show that there is a linear relationship between the oil-water two-phase flow stress gradient and the oil saturation and a quadratic relationship between the oil-water two-phase mobility ratio and the oil saturation. The strata/ pressure distribution for low-permeability reservoirs is highly sensitive to the oil-water two-phase flow stress gradient, and the effect is more noticeable near the wellbore.
Авторлар туралы
Zhang Tianjin
College of Petrol and Environmental Engineering, Yan’an University
Email: bortum@mail.ru
ҚХР, Yan an
Yang Xinping
Petroleum Exploration and Development Institute, Xinjiang oilfield
Email: bortum@mail.ru
ҚХР, Xinjiang
Yan Xuecheng
Gras Production Plant 2 of Changqing Company
Email: bortum@mail.ru
ҚХР, Yulin
Luo Zhongming
Research Institute of Petroleum Exploration and Development, Chuanqing Oilfield Company
Email: bortum@mail.ru
ҚХР, Chengdu