Fracturing technique for relieving fracturing fluid pollution

A fracturing fluid and fracturing technology, applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve problems such as damage to the reservoir by fracturing fluid, and achieve the effect of improving conductivity

Inactive Publication Date: 2007-11-28
郝东 +1
View PDF1 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a fracturing process for decontaminating the fracturing fluid in order to solve the problem exist

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] A fracturing process for removing fracturing fluid pollution. The steps include injecting the prefluid into the oil storage formation, continuing to inject the sand-carrying fluid when cracks appear in the oil storage formation, and then subsequently injecting the displacement fluid or the isolation fluid, in the above process Chlorine dioxide product is injected separately in the medium.

[0014] There are four specific options. The first is to inject the prefluid into the oil storage formation, then inject the chlorine dioxide product, and then inject the isolation fluid. When there are cracks in the oil storage formation, continue to inject the sand-carrying liquid, and finally Subsequent injection of replacement fluid.

[0015] The second type is to inject the chlorine dioxide product into the oil storage formation first, continue to inject the prefluid into the oil storage formation, continue to inject the sand-carrying fluid when cracks appear in the oil storage forma...

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 relates to an oil exploitation technology, in detail a fracturing process for releasing the pollution of fracturing liquid. It solves the problem that fracturing liquid hurts the storing layer in water-power fracturing construction for oil exploitation existing in prior technology. Procedures comprise that ahead fluid is injected into the oil storing layer; when cracks appear on the oil storing layer sand carrying liquid is injected continuously; then replacing liquid or isolating liquid is injected continuously; chlorine dioxide resultant is injected singly in the process mentioned above. Filter cake and concentrated fracturing liquid in ground crack can be eliminated more thoroughly and guiding flow capability of support sands in crack is improved. Permeability and retention can achieve more than 90%.

Description

technical field [0001] The invention relates to an oil exploitation technology, in particular to a fracturing process for decontaminating fracturing fluid. Background technique [0002] Fracturing technology is one of the most effective and mature means to develop low-permeability oilfields. Among them, hydraulic fracturing is a very widely used method. In this method, high-viscosity liquid (fracturing fluid) is injected into the oil well with a displacement that greatly exceeds the absorption capacity of the formation by using a surface high-pressure pump group, and gradually accumulates in the oil well. from high pressure. When the liquid pressure in the oil well is greater than the ground pressure near the well wall and the tensile strength of the rock, the oil-bearing formation near the bottom of the well will generate cracks under the action of pressure, and then continue to inject sand-carrying materials with supporting materials (such as sand grains). The sand-carry...

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
IPC IPC(8): E21B43/267
Inventor 郝东郝占元
Owner 郝东
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