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

Repeated transformation method for same-floor flooding and pressure combination production remaining geological reserves

A technology of geological reserves and repeated transformation, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc. It can solve the problems of limited transformation scale, limited production increase effect, and large decline, so as to expand the degree of production and improve development efficiency , the effect of broad application prospects

Inactive Publication Date: 2019-03-22
PETROCHINA CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the early stage, conventional old fracture filling was used to improve the refracturing technology. Due to the limited scale of stimulation, the effect of measures to increase production is limited, and the decline after measures is relatively large

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
  • Repeated transformation method for same-floor flooding and pressure combination production remaining geological reserves
  • Repeated transformation method for same-floor flooding and pressure combination production remaining geological reserves
  • Repeated transformation method for same-floor flooding and pressure combination production remaining geological reserves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 (G125-157 well):

[0037] Step 1: Perforation preparation: Prepare deep-penetrating composite perforating bullets (SYD102 / 127), preferably in layers with better physical properties at the bottom of the oil layer, with a perforation thickness of 5.0m and a perforation density of 16 holes / m to ensure oil displacement Smooth injection of fracturing fluid;

[0038] Step 2: Oil displacement fluid preparation: mix CRS surfactant at 3.75kg / m 3 The proportion of the oil displacement fracturing fluid is prepared, and the injection volume is designed to be 800m according to the length of the previous fracturing fracture. 3 ;

[0039] Step 3: Oil displacement fluid injection construction (see figure 2 ): double-upper casings are used for pressure injection into the pipe string, and the lower seal is an intubation-type packer. Oil-displacing fracturing fluid is used to 3 / min is injected into the new perforation section 800m 3 , the injection time is about 4.5 ho...

Embodiment 2

[0046] Step 1: Perforation preparation: prepare deep-penetrating composite perforating bullets (SYD102 / 127), select layers with better physical properties at the bottom of the oil layer, perforate thickness of 4.0m, and perforation density of 16 holes / m to ensure oil displacement Smooth injection of fracturing fluid;

[0047] Step 2: Oil displacement fluid preparation: mix CRS surfactant at 3.75kg / m 3 The proportion of the oil displacement fracturing fluid is prepared, and the injection volume is designed to be 1000m according to the length of the previous fracturing fracture. 3 ;

[0048] Step 3: Oil displacement fluid injection construction (see figure 2 ): double-upper casings are used for pressure injection into the pipe string, and the lower seal is an intubation-type packer. Oil-displacing fracturing fluid is used to 3 / min is injected into the new perforation section 1000m 3 , after the squeeze is over, the intubation packer is discarded, the injection section is s...

Embodiment 3

[0054] Step 1: Perforation preparation: prepare deep-penetrating composite perforating bullets (SYD102 / 127), select layers with good physical properties at the bottom of the oil layer, perforate thickness of 3.0m, and perforation density of 16 holes / m to ensure oil displacement Smooth injection of fracturing fluid;

[0055] Step 2: Oil displacement fluid preparation: mix CRS surfactant at 3.75kg / m 3 The proportion of the oil displacement fracturing fluid is prepared. According to the length of the previous fracturing fracture, the injection volume is designed to be 900m 3 ;

[0056] Step 3: Oil displacement fluid injection construction (see figure 2 ): double-upper casings are used to press-inject the pipe string, and the lower seal is an intubated packer. Oil-displacing fracturing fluid is used to 3 / min is injected 900m into the new perforation section 3 , after the squeeze is over, the intubation packer is discarded, the injection section is sealed, and the dialysis an...

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 repeated transformation method for same-floor flooding and pressure combination production remaining geological reserves. The method comprises the steps that at first, thickreservoir is subjected to bottom perforation, an original perforation section is blocked by means of a double upper sealing pressure drilling tool, a new perforation section RS is subjected to surfactant flooding, after injection is completed, the drilling tool is lifted up, sealing is conducted by means of an intubation packer, after well shut-in dialysis diffusion flooding is conducted for a period of time, the upper layer is subjected to repeated fracturing transformation, an old well volume cracking technology is implemented, net pressure in a joint is improved, a lateral new joint is opened, effective production of lateral remaining oil is expanded, and the oil well single well yield and the final recovery efficiency are improved. Accordingly, the maneuverability is high, double benefits of fracturing and flooding supplemental energy can be achieved, the production degree of the old well remaining geological reserves is effectively improved, the operating cost is lowered, and theoilfield development benefit can be greatly improved.

Description

technical field [0001] The invention relates to an oil well repeated fracturing process in the downhole operation technology of oil field exploration and development, in particular to a repeating reforming method of the same layer driving pressure combined with producing remaining geological reserves applied to ultra-low permeability oil layers to improve single well production of old wells. Background technique [0002] Low-pressure, low-permeability, and low-yield reservoirs are relatively thick and highly homogeneous in the vertical direction. In the early stage of development, concentrated perforation in the middle and upper parts, and a diamond-shaped anti-nine-point injection-production well pattern were adopted. After a long period of production, the injection water was extended Permeable layers break through, and low-permeable layers produce unevenly vertically, resulting in high recovery in the middle and upper parts of the reservoir, while bottom reservoirs have low...

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): E21B43/16E21B43/20E21B43/26E21B43/267
CPCE21B43/16E21B43/20E21B43/26E21B43/267
Inventor 李建山陆红军汪澜康博李向平卜军李转红杨军侠王飞吕小明
Owner PETROCHINA CO LTD
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com