Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optimization method of perforation parameters for maintaining balanced expansion of fractures in horizontal well staged fracturing

A technology of staged fracturing and optimization methods, which is applied in design optimization/simulation, earthwork drilling and production, wellbore/well components, etc., and can solve the problems of loss of perforation flow-limiting method, unbalanced fracture expansion, and perforation flow-limiting method. Problems such as unstable field application effect

Active Publication Date: 2020-01-21
SOUTHWEST PETROLEUM UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Incorrect design of perforation parameters may exacerbate the unbalanced behavior of fracture propagation, and due to the existence of perforation abrasion, the effect of poorly designed perforation flow restriction method will gradually lose its effect during the fracturing process
At present, due to the lack of scientific and reasonable perforation parameter optimization design methods, most engineers can only design based on engineering experience, resulting in unstable field application of perforation flow-limiting method

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optimization method of perforation parameters for maintaining balanced expansion of fractures in horizontal well staged fracturing
  • Optimization method of perforation parameters for maintaining balanced expansion of fractures in horizontal well staged fracturing
  • Optimization method of perforation parameters for maintaining balanced expansion of fractures in horizontal well staged fracturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Such as Figure 1-4 As shown, taking the 7th member of the XS shale gas well in the southern Sichuan area as an example, there are 3 clusters of perforations in the 7th member. A perforation parameter optimization method for maintaining the balanced expansion of staged fractures in horizontal wells, comprising the following steps:

[0111] S1: Collect and organize the geological and engineering conditions of the 7th section of shale gas well XS as shown in Table 1:

[0112] Table 1 Geological and engineering parameters of the 7th section of XS shale gas well

[0113]

[0114] Based on formula (1), the net inlet pressure value of the fracture in the fracturing section of the horizontal well is calculated as p i = 2.25 MPa.

[0115] S2: Calculate the minimum horizontal principal stress difference σ in the fracturing section based on the well logging data based on formula (2) d is 1.1MPa, and the distance attenuation factor G calculated based on formula (4) is 0.546...

Embodiment 2

[0123] Such as Figure 5 As shown, taking tight oil well CP 1 in Northeast China as an example, there are 3 clusters of perforations in the first section. A perforation parameter optimization method for maintaining the balanced expansion of staged fractures in horizontal wells, comprising the following steps:

[0124] S1: Collect and sort out the geological and engineering conditions of the first section of CP in tight oil wells, as shown in Table 3:

[0125]Table 3. Geological and engineering parameters of the first section of CP in an example tight oil well

[0126]

[0127] According to formula (1), the net inlet pressure value of the fracture in the fracturing section of the horizontal well is calculated as p i = 6.04MPa.

[0128] S2: Well logging data show that the stress homogeneity of the first section of the well is good, and the minimum horizontal principal stress difference σ in the fracturing section is calculated based on formula (2) d =0MPa, according to th...

Embodiment 3

[0134] Such as Figure 6 As shown, taking the CP 3rd member of the tight oil well in Northeast China as an example, there are 3 clusters of perforations in the 3rd member. A perforation parameter optimization method for maintaining the balanced expansion of staged fractures in horizontal wells, comprising the following steps:

[0135] S1: Collect and sort out the geological and engineering conditions of the third section of CP in tight oil wells, as shown in Table 4:

[0136] Table 4 Geological and engineering parameters of the 3rd section of CP in an example tight oil well

[0137]

[0138] According to formula (1), the net inlet pressure value of the fracture in the fracturing section of the horizontal well is calculated as p i = 6.04MPa.

[0139] S2: Well logging data show that the stress homogeneity of the third section of the well is good, and the minimum horizontal principal stress difference σ in the fracturing section is calculated based on formula (2) d =0MPa, ...

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

No PUM Login to View More

Abstract

The invention discloses a perforation parameter optimization method for maintaining the balanced expansion of segmental fracturing fractures in horizontal wells, comprising the following steps: S1, estimating the inlet net pressure value of fracturing fractures in horizontal wells; S2, calculating and maintaining the fracturing fractures in horizontal wells Perforation friction coefficient required for balanced expansion; S3. Calculation of perforation characteristic parameters; S4. Determination of optimal perforation parameters; S5. Establishment of a hydraulic fracture propagation calculation model with complete fluid-solid coupling; S6. Prediction and evaluation of target blocks Fracturing effect with optimized perforation parameters. The invention takes into account the heterogeneity of the stress field, the fluid-solid coupling and the multi-fracture stress shadow effect in the process of dynamic hydraulic fracture expansion, and also considers the impact of the perforation hole abrasion phenomenon, which can be effectively used to maintain horizontal well separation Fracture expansion in stage fracturing is simple and practical.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a perforation parameter optimization method for maintaining the balanced expansion of staged fracturing fractures in horizontal wells. Background technique [0002] At present, staged fracturing of horizontal wells is one of the most effective technical means for developing unconventional low-permeability oil and gas reservoirs. By densely laying perforation clusters in the fracturing section, engineers hope that the technology can form densely distributed hydraulic fracture groups in the target area to greatly increase the fracture area and oil and gas production. However, in recent years, based on monitoring data, engineers have realized that in the process of staged fracturing of horizontal wells, relatively serious fracture propagation imbalance behaviors often occur. In the process of hydraulic fracturing, most of the fracturing fluid only flows into i...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20E21B43/26
CPCE21B43/26G06F2119/06G06F30/20G01V2210/646G01V2210/66G06F2111/10E21B43/11E21B43/119E21B2200/20G01V20/00E21B49/00
Inventor 陈曦宇赵金洲李勇明江有适许文俊符东宇
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products