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

A Foam Composite Cold Recovery Method for Enhanced Recovery of Heavy Oil Reservoir

A technology for heavy oil reservoirs and recovery factors, which is applied in drilling compositions, chemical instruments and methods, and production fluids, etc., and can solve problems such as limitations in large-scale popularization and application, adaptability and cost, and short effective time. , to achieve the effect of improving heavy oil recovery, increasing stability, and improving foam quality and stability

Active Publication Date: 2020-10-13
CHINA PETROLEUM & CHEM CORP +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermal recovery technologies mainly include: steam stimulation technology, steam flooding technology, fire flooding (burning) technology, steam assisted gravity drainage (SAGD) technology, horizontal fracturing assisted steam flooding (FAST) technology, steam and non-condensate gas propulsion ( SAGP) technology, etc. Most of the heavy oil thermal recovery technologies have the problems of high cost, short effective time and poor economic benefits
Cold recovery technologies mainly include alkali flooding technology, polymer flooding, microbial method, VAPEX technology, etc., respectively have problems of adaptability and cost, and large-scale application is limited to a certain extent

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
  • A Foam Composite Cold Recovery Method for Enhanced Recovery of Heavy Oil Reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: A foam composite cold recovery method for enhancing the recovery of heavy oil reservoirs

[0028] Proceed as follows:

[0029] (1) Water flooding until the comprehensive water content is greater than 95%;

[0030] (2) Inject the heavy oil viscosity-reducing oil-displacement agent into the water injection well, and the volume of the heavy-oil viscosity-reducing oil-displacement agent is 0.04 times the pore volume of the reservoir;

[0031] (3) Inject water into the water injection well to restore water flooding, and the water injection volume is 0.04 times the pore volume of the reservoir;

[0032] (4) The polymer composite foam flooding system is injected into the water injection well, and the volume of the polymer composite foam flooding system is 0.04 times the pore volume of the reservoir;

[0033] (5) Repeat steps (2)-(4) until the total injection volume of heavy oil viscosity-reducing oil displacement agent and polymer composite foam flooding system is...

Embodiment 2

[0036] Example 2: A foam composite cold recovery method for enhancing the recovery of heavy oil reservoirs

[0037] Proceed as follows:

[0038] (1) Water flooding until the comprehensive water content is greater than 95%;

[0039] (2) Inject heavy oil viscosity-reducing oil displacement agent into the water injection well, and the volume of heavy oil viscosity-reducing oil displacement agent is 0.05 times of the pore volume of the reservoir;

[0040] (3) Inject water into the water injection well to restore water flooding, and the water injection volume is 0.03 times the pore volume of the reservoir;

[0041] (4) The polymer composite foam flooding system is injected into the water injection well, and the volume of the polymer composite foam flooding system is 0.05 times the pore volume of the reservoir;

[0042] (5) Repeat steps (2)-(4) until the total injection volume of heavy oil viscosity-reducing oil displacement agent and polymer composite foam flooding system is 0.5 ...

Embodiment 3

[0045] Example 3: A foam composite cold recovery method for enhancing the recovery of heavy oil reservoirs

[0046] Proceed as follows:

[0047] (1) Water flooding until the comprehensive water content is greater than 95%;

[0048] (2) Heavy oil viscosity-reducing oil displacement agent is injected into the water injection well, and the volume of the heavy oil viscosity-reducing oil displacement agent is 0.03 times the pore volume of the reservoir;

[0049] (3) Inject water into the water injection well to restore water flooding, and the water injection volume is 0.05 times the pore volume of the reservoir;

[0050] (4) The polymer composite foam flooding system is injected into the water injection well, and the volume of the polymer composite foam flooding system is 0.03 times the pore volume of the reservoir;

[0051] (5) Repeat steps (2)-(4) until the total injected volume of heavy oil viscosity-reducing oil displacement agent and polymer composite foam flooding system is...

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

PropertyMeasurementUnit
viscosityaaaaaaaaaa
quality scoreaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of heavy oil recovery and particularly relates to a foam composite cold recovery method for improving the efficiency of recovering a heavy oil reservoir. The method mainly includes the steps that a heavy oil viscosity-reduction oil flooding agent, water and a polymer composite foam oil flooding system are alternately injected into a water injection well, and then water flooding is conducted. The efficiency of recovering heavy oil can be effectively improved under non-heating conditions, and the recovery efficiency is improved by 15% or above. The method combines different heavy oil recovery methods, can lay a technical foundation and provide guarantees for complex subsequent recovery of the heavy oil reservoir, and has a great practical meaningon development of the heavy oil reservoir in an oil field.

Description

technical field [0001] The invention belongs to the technical field of heavy oil exploitation, and in particular relates to a foam composite cold recovery method for increasing the recovery rate of heavy oil reservoirs, which is suitable for reservoir temperatures not higher than 80°C, salinity lower than 20000mg / l, calcium The concentration of magnesium ions is lower than 500mg / l, the viscosity of underground crude oil is lower than 5000mPa·s, and the permeability is 500×10 -3 µm 2 ~50000×10 -3 µm 2 of oil reservoirs. Background technique [0002] At present, most oil fields in eastern China have entered the late stage of development, and it is difficult to increase production. The recovery rate of heavy oil reservoirs is relatively low and the potential is great. Heavy oil reserves in my country are large and widely distributed. Under the condition that conventional crude oil is limited by reserve growth, the exploitation of heavy oil reservoirs is more important. Due...

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): E21B43/22E21B43/20E21B43/16C09K8/594
CPCC09K8/594E21B43/16E21B43/168E21B43/20
Inventor 杨勇曹绪龙王其伟孙业恒郭兰磊吴光焕李雪松李向良祝仰文仉莉元福卿盛强郭平王红艳马宝东张营华王军志孙梅施晓乐
Owner CHINA PETROLEUM & CHEM CORP
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