Tight sandstone gas reservoir horizontal well staged fracturing crack position optimization method
A technology for staged fracturing of tight sandstone gas reservoirs, applied in the field of staged fracturing fracture location optimization in horizontal wells of tight sandstone gas reservoirs, to achieve the effects of improving fracturing effects and high absolute unobstructed flow
Active Publication Date: 2021-01-05
NORTHWEST UNIV(CN)
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the current fracturing optimization of horizontal wells pays more attention to the influence of fracture parameters on productivity. In addition to not considering the interference between multiple factors, it also rarely pays attention to the influence of the selection of the location of the fracturing horizontal section on the fracturing effect.
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0037] The X horizontal well area is located in the east of the Ordos Basin. The average permeability of the well area is 0.34mD, the average porosity is 6.6%, and the average gas saturation is 60.7%. It is a typical tight sandstone gas reservoir. Based on the L gas reservoir description data and fluid high-pressure physical property data, a gas reservoir horizontal well fracturing numerical simulation model was established. The model is a gas-water two-phase black oil model with a grid number of 53×66×60. The three-dimensional distribution of the permeability of the L gas reservoir model is shown in the attached figure 1 shown.
[0038] As described in the method required by the patent, in order to verify the reliability and advantages of the established method, this paper compares it with the single-factor optimization results. According to the single-factor optimization results, the longer the half-length of the fracture, the more the number of cracks, and the greater the c...
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 PUM
Login to View More Abstract
The invention relates to a tight sandstone gas reservoir horizontal well staged fracturing crack position optimization method, and provides a tight sandstone gas reservoir horizontal well staged fracturing crack position optimization process, which comprises the optimization of a fracturing crack position of a horizontal well section and the optimization of crack parameters, wherein the optimization of the fracturing crack position of the horizontal well section is based on a grid data-based advantageous productive potential evaluation method, and the optimization of crack parameters is designed by using a response surface multi-factor test. According to the method provided by the invention, the coupling relationship between the optimization of the fracturing fracture position and the optimization of the multi-target fracture parameters is considered at the same time, and the optimization result has more advantages for improving the initial absolute open-flow capacity of the gas reservoir.
Description
technical field [0001] The invention belongs to the technical field of gas reservoir engineering horizontal well fracturing development optimization, and in particular relates to a method for optimizing the location of staged fracturing fractures in horizontal wells of tight sandstone gas reservoirs. Background technique [0002] Tight sandstone gas reservoirs are generally low-porosity and low-permeability reservoirs, and the natural productivity of gas wells is very low. Conventional vertical well development is difficult to produce economic benefits. Therefore, horizontal wells are mostly exploited by staged fracturing. The optimal design of horizontal well fracturing is an important means to achieve efficient and economical gas well production. The production after fracturing of horizontal wells is not only related to fracture parameters, but also related to fracture locations. However, the current fracturing optimization of horizontal wells pays more attention to the in...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F30/17G06F111/10G06F113/08G06F119/14
CPCG06F30/28G06F30/17G06F2111/10G06F2113/08G06F2119/14Y02A10/40
Inventor 丁帅伟席怡刘广为李鹏范倩倩于红岩
Owner NORTHWEST UNIV(CN)