Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of over-pressured well fracturing with periodic shock waves

a well fracturing and shock wave technology, applied in the field of earth fracturing, can solve the problems of other more expensive methods of injecting treatment liquids, and the method requires a significant amount of energy

Inactive Publication Date: 2011-10-27
KOSTROV SERGEY A +1
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a method for fracturing a formation around a wellbore by using periodic / cyclic shock waves generated by a tool installed in the casing near the formation. The shock waves have an amplitude that is at least not less than the fracture gradient pressure of the formation. The tool is sealed from the perforations using packer(s) and is installed opposite a non-perforated formation. The technical effects of this invention include improved wellbore stimulation, increased oil and gas production, and reduced damage to the formation."

Problems solved by technology

However, this method requires a significant amount of energy and to have a relatively large diameter tubing string in which to hold a sufficient charge of pressured gas to provide an adequate fracture fluid pressure and flow characteristics.
In addition, there are other more expensive means of injecting treatment liquids that have been proposed.

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
  • Method of over-pressured well fracturing with periodic shock waves
  • Method of over-pressured well fracturing with periodic shock waves
  • Method of over-pressured well fracturing with periodic shock waves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011]Referring to FIG. 1 and FIG. 2, there is shown a fluid producing or injecting well 9 extending downwardly into the earth to penetrate a subterranean hydrocarbon bearing or other type of formation 10. The well includes a wellbore 11, a casing string 1 and a cement sheath 12 isolating the casing string 1 from the bore hole 11. A series of perforations 4 communicate between the formation 10 and interior of the casing string 1. A tubing or production / injection string 2 extends downwardly into the casing string 1 and a packer 3 seals between the production and / or injection string 2 and the casing string 1. The shock wave generating tool 6 is installed against perforations 4 on a conventional suspension means 7 and the fracturing fluid 5 is pumped into perforations 4 under pressure(s) exceeding the fracture gradient pressure of the formation 10. The shock wave generating tool 6 generates the shock waves 8 affecting the fractures / cracks 14 thereby increasing their length. The shock w...

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

Fractures are initiated or extended into earth formations from a well by providing pressured fluid in said wellbore at pressures exceeding the fracture gradient pressure of said formation and by generating a cyclic shock waves. Periodic shock waves applied simultaneously with a high pressured fluid on a formation increases the length of fractures / cracks in the formation.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a method for fracturing the earth from a wellbore by overpressuring a fluid(s) and / or gases inside the wellbore and applying periodic shock waves.BRIEF DESCRIPTION OF PRIOR ART[0002]Fracturing the earth from a wellbore is a known technique for enhancing oil production and recovery from an oil bearing bed. A variety of methods have been proposed to create both short and long fractures near a wellbore. One of method is described and claimed in U.S. Pat. No. 5,617,921 by Schmidt et al. wherein a method for initiating and / or extending a fracture in an earth's formation from a well penetrating the formation utilizing a source of high pressure fracturing fluid disposed on the earth's surface which is released to flow into and through the well at a predetermined time to initiate and / or extend the fracture. However, this method requires a significant amount of energy and to have a relatively large diameter tubing string in wh...

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(United States)
IPC IPC(8): E21B43/26
CPCE21B28/00E21B43/26E21B43/003
Inventor KOSTROV, SERGEY A.WOODEN, BILL
Owner KOSTROV SERGEY A