Compound oil-displacing agent for high temperature reservoir and compound oil-displacing system

A technology for composite flooding and high temperature oil, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance and cannot be used effectively in oil reservoirs, and achieves delayed demulsification and good solubilization of oil and water. The effect of strong ability to solubilize oil and water

Active Publication Date: 2015-11-11
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a compound oil displacement agent for high temperature oil reservoirs to solve the technical problem that the existing compound oil displacement system has poor temperature resistance and cannot be effectively applied in oil reservoirs above 90°C

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
  • Compound oil-displacing agent for high temperature reservoir and compound oil-displacing system
  • Compound oil-displacing agent for high temperature reservoir and compound oil-displacing system
  • Compound oil-displacing agent for high temperature reservoir and compound oil-displacing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The composite oil displacement agent of this embodiment is composed of the following components in parts by mass: 10 parts of AN923 type polymer, 80 parts of SH6 type surfactant, and 100 parts of NaCl.

[0038] The composite oil displacement system of this embodiment is composed of components with the following concentrations: 1000 mg / L of AN923 type polymer, 8000 mg / L of SH6 type surfactant, 10000 mg / L of NaCl, and the balance is water.

[0039]The preparation method of the composite oil displacement system of the present embodiment comprises the following steps:

[0040] 1) Take a part of the amount of sewage injected into Shuanghe Oilfield into a beaker, adjust the speed of the blade stirrer to 500r / min, stir to make the water form a vortex, take the amount of granular AN923 polymer, and slowly sprinkle the polymer Pour into water and keep stirring for 2 hours to make polymer mother liquor;

[0041] 2) Take the SH6-type surfactant and NaCl of the formulated amount, ...

Embodiment 2

[0046] The composite oil displacement agent of this embodiment is composed of the following components in parts by mass: 10 parts of AN923 polymer, 100 parts of SH6 surfactant, and 100 parts of NaCl.

[0047] The composite oil displacement system of this embodiment is composed of components with the following concentrations: AN923 polymer 1000 mg / L, SH6 type surfactant 10000 mg / L, NaCl 10000 mg / L, and the balance is water.

[0048] The preparation method of the composite oil displacement system of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0050] The composite oil displacement agent of this embodiment is composed of the following components in parts by mass: 15 parts of AN923 polymer, 50 parts of SH6 surfactant, and 200 parts of NaCl.

[0051] The composite oil displacement system of this embodiment is composed of components with the following concentrations: AN923 polymer 1500 mg / L, SH6 type surfactant 5000 mg / L, NaCl 20000 mg / L, and the balance is water.

[0052] The preparation method of the composite oil displacement system of this embodiment is the same as that of Embodiment 1.

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
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a compound oil-displacing agent for a high temperature reservoir and a compound oil-displacing system. The compound oil-displacing agent is prepared from the following components in parts by mass: 5-15 parts of polymer, 40-100 parts of negative and non-ionic compound surfactant and 50-200 parts of NaCl. After the compound oil-displacing agent is mixed with water, the compound oil-displacing system capable of forming micro emulsion in a high temperature reservoir is formed; the compound oil-displacing system can act with crude oil to form stable micro emulsion and has the characteristics of strong oil-water solubilizing capability and ultra-low interface tension; the oil-displacing system is capable of resisting temperature of 105 DEG C, has good long-term thermal stability and good injectivity, and can obviously improve the recovery efficiency; and the oil-displacing agent is suitable for a high temperature reservoir of which the reservoir temperature is 80-105 DEG C, the permeability rate is equal to or higher than 200*10<-3>mu m<2> and the salinity is 0-100000mg / L, and the crude oil recovery ratio is improved.

Description

technical field [0001] The invention belongs to the technical field of compound oil displacement in oil fields, and in particular relates to a composite oil displacement agent and a composite oil displacement system for high-temperature oil reservoirs. Background technique [0002] In China, the chemical flooding resources in Shengli Oilfield are 16.05×10 8 t, where the geological reserves of high temperature (temperature: 80-120°C) reservoirs are 5.1×10 8 t, accounting for 31.8% of the total reserves. The chemical flooding resources in Henan Oilfield are 15.93×10 7 t, of which the high-temperature (temperature: 80-102°C) oil reservoir geological reserves are 5.78×10 4 t, accounting for 36.2% of the total reserves, the reserves of high-temperature oil reservoirs are large. As the development of existing oilfields gradually enters the period of medium-high water cut, the situation of "stabilizing water and controlling oil" is very severe, and the development of high-tempe...

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): C09K8/584C09K8/588
CPCC09K8/584C09K8/588
Inventor 刘艳华孔柏岭郭艳肖磊束华东林杨李二晓孙林涛郝明耀
Owner CHINA PETROLEUM & CHEM CORP
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