Prediction method for extension track of hydrofracture complex fracture of conglomerate reservoir

A technology for hydraulic fracturing and complex fractures, applied in prediction, data processing applications, instruments, etc., can solve problems such as insufficient consideration of gravel geometry and irregular contours, lack of prediction and interpretation, and failure to consider gravel and matrix
CN114548593APending Publication Date: 2022-05-27SOUTHWEST PETROLEUM UNIV
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SOUTHWEST PETROLEUM UNIV
Publication Date
2022-05-27

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a conglomerate reservoir hydrofracture complex fracture extension trajectory prediction method, which comprises the following steps: generating a square servo boundary, and randomly generating a matrix particle model in the servo boundary; generating a gravel profile in the matrix particle model; defining the matrix in the gravel contour as a gravel particle cluster, and respectively assigning the mesomechanics parameters of matrix particles and gravel particles; gravel edge contact on the gravel contour is obtained by writing a traversal function; establishing a pipe domain seepage model, carrying out fluid-solid coupling, giving an injection rate, and establishing a crack extension criterion; gravels with different cementation strengths and crack extension tracks under the gravel edges with different cementation strengths are simulated by changing microscopic mechanical parameters of gravel particles and gravel edges. The method has the following beneficial effects that complex geometrical shapes and irregular outlines of gravels and different cementing strengths of gravel edges are fully considered, and the process of generating complex cracks when hydrofracture cracks meet the gravels can be further known.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for predicting the extension trajectory of complex fractures of conglomerate reservoir hydraulic fracturing, and belongs to the field of oil and gas field stimulation and reconstruction. Background technique

[0002] Conglomerate reservoirs generally have the characteristics of low porosity, low permeability and strong heterogeneity. At present, hydraulic fracturing has become the main measure for stimulation and stimulation of tight conglomerate reservoirs.

[0003] The pore structure of conglomerate reservoirs is relatively complex, with strong heterogeneity and obvious anisotropy, and gravel particles have a great influence on the fracture extension process. Impact. Conglomerate is mainly composed of gravel, matrix and gravel edge, among which the gravel is mostly angular or sub-angular, mainly irregular polygons. The current method of hydraulic fracturing fracture extension of conglomerate reservoirs does not full...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More