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

Water-logging fire-flooding oil reservoir combustible blocking method

A fire flooding and oil reservoir technology, which is applied in the direction of earthwork drilling, sealing/packing, and production fluid, etc., can solve the problems of affecting the recovery rate, polluting the formation, wasting effective resources, etc., and achieve the effect of uniform combustion

Active Publication Date: 2019-03-22
PETROCHINA CO LTD
View PDF14 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The profile control method for fire flooding reservoirs mentioned in the above patents and articles, the profile control and channeling agent used cannot be burned, and has the problem of polluting the formation to varying degrees, wasting effective resources and affecting the increase in ultimate recovery

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

Embodiment 1

[0028] This embodiment is completed with other blocking agents as the third slug.

[0029] In an oilfield, Yulou oil layer fire flooding injection well, 14 sub-layers were drilled for 10 meters, water flooded, and there was no oil in the well flushing. According to the data of adjacent wells, there is a risk of gas channeling. For smooth ignition, implement the following process:

[0030] 1. Install the electric ignition tool according to the plan.

[0031] 2. Combustion-supporting channeling agent: 40% dodecyl dimethyl betaine, 40% k-12 sodium lauryl sulfate, 20% ammonium persulfate, percentage by weight, industrial grade. Prepare 10% solution with clear water, and inject 208 square meters into the first slug. Injection pressure 0.5MPa, injection speed 30m 3 / h.

[0032] 3. Wash the tank of the above-mentioned combustion-supporting channeling agent with clean water, and the washing solution is continuously injected into the formation for 180 square meters as the second sl...

Embodiment 2

[0039] The fire flooding injection well in an oilfield was flooded, the well was flushed without oil, and the area near the wellbore was seriously short. According to the data, the oil saturation was extremely low. For smooth ignition, implement the following process:

[0040] 1. Install the electric ignition tool according to the plan.

[0041] 2. Select 70 tons of refinery oil slurry, adjust the oil slurry to 50°C viscosity of 375mPa.s with diesel oil, and set aside.

[0042] 3. Mix 5% calcium peroxide evenly into the above materials to form a combustible plugging agent.

[0043] 4. Preheat the combustible plugging agent to 65°C, and then use the injection equipment to inject the combustible plugging agent into the formation. The injection pressure rises from 2MPa to 7.2MPa, and the injection speed is 10m 3 / h.

[0044] 5. Inject 45 cubic meters of commercially available water-based industrial oil cleaning agent into the wellbore for cleaning. Injection pressure 7.2-6.8...

Embodiment 3

[0049] A fire flooding injection well in an oilfield had 27 rounds of huff and puff, water flooded with a water cut of 98%, and a serious shortfall near the wellbore. According to data, the oil saturation in the area affected by steam huff and puff is extremely low. For smooth ignition, implement the following process:

[0050] 1. Install the electric ignition tool according to the plan.

[0051] 2. Select 20 tons of emulsified paraffin wax for industrial use, with a solid content of 30%, dilute it 5 times with clear water, then mix it with 500KG manganese dioxide, and set it aside.

[0052] 3. Inject the above mixed solution into the formation with injection equipment. Injection pressure 5.5MPa, injection speed 20m 3 / h.

[0053] 4. Reinject the combustion-supporting channeling agent (40% of dodecyl dimethyl betaine, 40% of k-12 sodium lauryl sulfate, 20% of ammonium persulfate, percentage by weight, industrial grade. Clear water prepares 1% solution ) 100 square meters. ...

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 water-logging fire-flooding oil reservoir combustible blocking method. The method comprises the steps that oil or water is used for carrying a combustible blocking agent anda combustion improver to be injected into an injection well to conduct profile control and plugging. The water-logging fire-flooding oil reservoir combustible blocking method mainly aims at multi-turnsteam huff and puff blocks, water logging exists, stratum deficits are serous, the oil saturation of immediate vicinity of wellbore is low (95% or above of water is contained), and a fire-flooding injection well is prepared. Accordingly, the combustible blocking agent and the combustion improver are carried through the oil or the water, combustible organic matter is provided while profile controland plugging re conducted on the immediate vicinity of wellbore, ignition is uniform, and combustion is sufficient.

Description

technical field [0001] The invention belongs to the field of oil field application. Specifically, it relates to a combustible plugging method for water-flooded fire flooding oil reservoirs. Background technique [0002] Fire flooding is to use heavy components in formation crude oil as fuel, use air or oxygen-enriched gas as a combustion aid, adopt methods such as spontaneous combustion and artificial ignition to make the temperature of the oil layer reach the ignition point of crude oil, and continuously inject combustion aids to make the oil layer continue to burn , the combustion reaction generates a large amount of heat, heating the oil layer, so that the temperature of the oil layer rises to 600-700 ° C, the heavy components are cracked at high temperature, the injected gas, the light oil generated by the cracking of heavy oil, the gas generated by combustion and water vapor are used It is used to drive the flow of crude oil to and from production wells. [0003] Ther...

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): E21B43/243E21B43/16E21B33/13
CPCE21B33/13E21B43/16E21B43/243
Inventor 尹长海马春宝王德伟姚长江高玉军贾财华段效威刘长环陈雪桑雨熊忠平曲冬雪周明旺黄海礁梁海波
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