Step displacement increasing fracturing automatic control method used for hole opening

A step and perforation technology, applied in the field of automatic control of step-up displacement fracturing, can solve the problems of no real-time analysis, etc., and achieve the effect of improving the fracture effect, increasing the utilization rate, and increasing the transformation effect

Active Publication Date: 2020-11-27
SICHUAN HONGHUA ELECTRIC
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no real-time analysis of the pressure curve during the fracturing construction process in China to control the step-up displacement automatic control technology for opening the holes.

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
  • Step displacement increasing fracturing automatic control method used for hole opening
  • Step displacement increasing fracturing automatic control method used for hole opening
  • Step displacement increasing fracturing automatic control method used for hole opening

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0036] refer to figure 1 , the embodiment of the present invention provides an automatic displacement control system, the automatic displacement control system includes a main controller, a liquid distribution system, a sand mixing system and a pump injection system, the liquid distribution system may include a liquid tank and a mixing device, used It is used to configure fracturing fluid, and can respond to the instructions of the main controller; the sand mixing system includes a sand mixing device, a proppant storage device, and a proppant delivery device, which is used to configure the sand mixing fluid, and can respond to the instructions of the main controller; the pump The injection system includes a pump controller and on...

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 step displacement increasing fracturing automatic control method used for hole opening. The method includes the following steps that S1, fracturing liquid with the first preset displacement is injected into a shaft; S2, the pressure value and the pumping displacement of the fracturing liquid in the shaft are obtained in real time; S3, the pressure feature value in a timewindow is calculated in real time, and a pressure changing feature is analyzed; S4, the displacement increasing amount and the displacement increasing time are determined according to the pressure feature value in the time window and the pressure changing feature; S5, when the displacement increasing condition is met, displacement increasing operation is executed; and S6, the steps S2-S5 are defined as one stage, and when the pumping displacement is smaller than the designed final displacement value, at least one stage is repeated. By means of the step displacement increasing fracture automatic control method used for hole opening, the fracturing effect of the fracturing liquid on an oil / gas reservoir is effectively improved, the utilization rate of a perforation hole is increased, the complexity degree of cracks close to the shaft is lowered, and multiple sets of fractures in the fracturing process can evenly extend; and in addition, the reservoir is increased, the volume and the fracture diversion capability are effectively transformed, and therefore the oil / gas well productivity is increased.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to an automatic control method for step-up displacement fracturing for hole opening. Background technique [0002] Fracturing refers to the injection of fracturing fluid and proppant into the oil / gas reservoir through the surface high-pressure pump group to transform the reservoir and form artificial fractures with a certain volume and conductivity. Oil or natural gas can penetrate into the wellbore through the fractures. This increases oil / gas well production. At present, there are many kinds of fracturing construction techniques that can be used in the development of oil and gas wells. For the same fracturing construction technique, the control of the pump injection displacement has a great influence on the fracture conductivity and the effective stimulation volume of the reservoir. These two parameters It determines the productivity of oil / gas wells after fractu...

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 Applications(China)
IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 祝磊马双富
Owner SICHUAN HONGHUA ELECTRIC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap