Semianalytical Coupled Model of Transient Pressure Behavior for Horizontal Well with Complex Fracture Networks in Tight Oil Reservoirs
Table 1
Summary table of numerical model.
Model name
Discrete diagram
Representative research
Advantages
Disadvantages
DFN
Yao et al., 2010 [10]; Dreuzy et al., 2012 [11]; Habibi et al., 2014 [12];
Accurately characterize the orientation and dimensions of the fracture. The meshing method is simple, reducing the number of solving nodes
There is a solution node on the fracture, and there is no solution node in the matrix, which leads to a rough description of fluid seepage in the matrix.
DFM
Baca et al., 1984 [13]; Karimi-Fard et al., 2004; Yan et al., 2016 [14]; Zhang et al., 2017 [15]; Zhang et al., 2017 [16]; Zhang et al., 2017 [17]
Both the fracture and matrix have solution nodes. The matrix mesh is divided along the fracture shape to describe the discrete characteristics of the fractures.
Fine partitioning of the grid leads to the explosion of computing grid, resulting in large computation and low efficiency.
EDFM
Lee et al., 2000 [18]; Li & Lee, 2008 [19]; Yan Xia et al., 2014 [20]; Jiang et al., 2016 [21]
The effect of medium and small length fissures on seepage flow is treated by equivalent grid permeability, and large scale fractures are described separately. Embedded processing reduces the number of discrete grids.
This method needs to record the relative position between fracture and grid. It can increase the data storage in the tight oil reservoir which containing large scale cracks.
