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

An oil-based combustible plugging agent for water-flooded fire flooding reservoirs

A plugging agent and oil-based technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of wasting effective resources, affecting recovery, and inability to burn profile control and channeling agents

Active Publication Date: 2021-01-29
PETROCHINA CO LTD
View PDF20 Cites 0 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

[0027] This embodiment is completed with other blocking agents as the third slug.

[0028] 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:

[0029] 1. Install the electric ignition tool according to the plan.

[0030] 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.

[0031] 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

[0038] 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:

[0039] 1. Install the electric ignition tool according to the plan.

[0040] 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.

[0041] 3. Mix 5% calcium peroxide evenly into the above materials to form a combustible plugging agent.

[0042] 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.

[0043] 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...

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
Login to View More

Abstract

The invention discloses a water-logging fireflooding oil deposit oil-based combustible blocking agent. The water-logging fireflooding oil deposit oil-based combustible blocking agent comprises a carrying agent, a combustible blocking agent main component and a combustion improver; the oil-based carrying agent serves as the carrying agent; the combustible blocking agent main component is one or more of residual oil, asphalt, paraffin, rosin, starch and coke or charcoal powder; the combustion improver is one or two of calcium peroxide and manganese oxide. The water-logging fireflooding oil deposit oil-based combustible blocking agent mainly aims at solving the problem that after multiple rounds of steam huff and puff, blocks are water-logged, stratum deficit is serious, the oil saturation ofimmediate vicinity of wellbores is very low, the moisture is larger than 99%, and fireflooding injection wells are prepared. Through carrying of the combustible blocking agent main component and thecombustion improver in oil, combustible organic matter is provided while the immediate vicinity of wellbores is subjected to profile control and blocking, so that ignition is uniform and combustion issufficient.

Description

technical field [0001] The invention belongs to the field of oil field application. In particular, it relates to an oil-based combustible plugging agent 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. ...

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): C09K8/508C09K8/514C09K8/493C09K8/58
CPCC09K8/493C09K8/508C09K8/514C09K8/58
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张淑颖吴松毓
Owner PETROCHINA CO LTD