Characterization of Key Tight Oil Parameters and Mass Transfer of Counter-Current Imbibition in Fractured Tight Oil Reservoirs

被引：2

作者：

Xu, Zhongyi ^{[1
]}

Cheng, Linsong ^{[1
]}

Cao, Renyi ^{[1
]}

Fang, Sidong ^{[1
]}

Wu, Jiuzhu ^{[1
]}

Zhuang, Yongtao ^{[2
]}

Ai, Shuang ^{[3
]}

机构：

[1] College of Petroleum Engineering, China University of Petroleum, Beijing,102249, China

[2] Oil Production Technology Institute, Dagang Oilfield Company, PetroChina, Tianjin,300280, China

[3] Research Institute of Petroleum Engineering, SINOPEC, Beijing,100101, China

来源：

Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2017年 / 42卷 / 08期

关键词：

Boundary layers - Complex networks - Petroleum reservoirs - Petroleum reservoir engineering - Sailing vessels - Porosity - Boundary element method - Natural fractures;

D O I：

10.3799/dqkx.2017.108

中图分类号：

学科分类号：

摘要：

During the process of tight oil exploration, counter current imbibition effect is significantly different due to the presence of complex fracture network and flow characteristics in tight oil reservoirs. But at present, there is no proper model to simulate counter-current imbibition in fractured reservoir considering the characteristics of tight oil formation. In order to solve this problem, PEBI grids are used to match the complex fracture network, natural fractures and matrix are idealized as dual-porosity medium, rate of mass transfer of imbibition between matrix and fractures is treated as source or sink term in dual porosity model. A new semi analytical model for the calculation of mass transfer function of counter-current imbibition in the presence of complex fracture network is established by using radial integration boundary element method (RIBEM). In addition, to reflect the flow characteristics of tight oil, relative permeability and capillary pressure curve with the effect of boundary layer considered, and mixed wettability have also used in the mass transfer model. Besides, we show the capacity and practical application of the model with a field example from tight oil reservoir. From simulated results, it is concluded that counter-current imbibition plays an important role in improving the oil recovery and the existence of boundary layer reduces the contribution of imbibition to oil production dramatically. © 2017, Editorial Department of Earth Science. All right reserved.

引用

页码：1431 / 1440