Composition for penetration-driving oil recovery agent and penetration-driving oil recovery agent

A technology of composition and auxiliary agent, which is applied in the field of seepage-displacement oil recovery agent composition and seepage-displacement oil recovery agent, and can solve the problems of low oil recovery and low oil recovery in low-permeability oil reservoirs, etc.

Active Publication Date: 2012-09-19
PETROCHINA CO LTD
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of the technologies described above, the purpose of the present invention is to provide a composition for a seepage-displacement type oil recovery agent with good performance and higher re

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
  • Composition for penetration-driving oil recovery agent and penetration-driving oil recovery agent
  • Composition for penetration-driving oil recovery agent and penetration-driving oil recovery agent
  • Composition for penetration-driving oil recovery agent and penetration-driving oil recovery agent

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1

[0038] (1) Preparation of flooding oil recovery agent

[0039] 0.1g sodium polyacrylate, 0.02g NaHCO 3 And NaCl mixture (NaHCO 3 :NaCl=1:1 (mass ratio)), 0.03g sodium polyaspartate, 0.02g polyoxyethylene sorbitan monooleate, and 99.83g clean water or Daqing formation simulated water are mixed uniformly to obtain 100g flooding Type oil recovery agent, the pH value of the flooding type oil recovery agent is 6.8.

[0040] (2) Imbibition deoiling experiment

[0041] The flooding oil recovery agent prepared by step (1) and the viscosity at 45℃ is 10mPa·s, d=0.8294g / cm 3 The core saturated with Daqing crude oil was subjected to static imbibition deoiling experiment. For details, please refer to SY / T6424-2000 "Combined flooding system performance test method" and an atmospheric deoiling bottle (for example: provided by ZL201120075849.7" A self-absorption instrument", the full text is quoted here as a reference). The results are shown in Table 1.

[0042] Table 1

[0043] ...

Example Embodiment

[0044] Example 2

[0045] (1) Preparation of flooding oil recovery agent

[0046] Add 0.05g sodium polyacrylate, 0.5g NaHCO 3 And NaCl mixture (NaHCO 3 :NaCl=2:1 (mass ratio)), 0.05g sodium polyaspartate, and 99.4g of clear water or Daqing formation simulation water are mixed uniformly to obtain 100g of a flooding oil recovery agent, the pH of the flooding oil recovery agent The value is 7.4.

[0047] (2) Imbibition deoiling experiment

[0048] The flooding oil recovery agent prepared by step (1) and the viscosity at 45℃ is 10mPa·s, d=0.8294g / cm 3 The core saturated with Daqing crude oil was subjected to static imbibition deoiling experiment. For details, please refer to SY / T6424-2000 "Combined flooding system performance test method" and an atmospheric deoiling bottle (for example: provided by ZL201120075849.7" A self-absorption instrument", the full text is quoted here as a reference). The results are shown in Table 2.

[0049] Table 2

[0050]

Example Embodiment

[0051] Example 3

[0052] (1) Preparation of flooding oil recovery agent

[0053] Add 0.05g sodium polyacrylate, 0.02g NaHCO 3 And NaCl mixture (NaHCO 3 :NaCl=3:1 (mass ratio)), 0.01g sodium polyaspartate, and 99.92g clear water or Dagang formation simulated water are mixed uniformly to obtain 100g flooding type oil extraction agent, the pH of said flooding type oil extraction agent The value is 6.8.

[0054] (2) Imbibition deoiling experiment

[0055] The flooding oil recovery agent prepared by step (1) and the viscosity at 53°C is 9.9mPa·s, d=0.8603g / cm 3 The Dagang saturated core crude oil was subjected to static imbibition deoiling experiment. For specific operations, please refer to SY / T6424-2000 "Combined flooding system performance test method" and an atmospheric deoiling bottle (for example: provided by ZL201120075849.7" A self-absorption instrument", the full text is quoted here as a reference). The results are shown in Table 3.

[0056] table 3

[0057]

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
Viscosityaaaaaaaaaa
Login to view more

Abstract

The invention provides a composition for a penetration-driving oil recovery agent. The composition comprises the following components in percentage by weight: 0.5-45 percent of a main agent, 0.5-50 percent of an auxiliary agent and 5-99 percent of an inorganic alkali metal salt, wherein the main agent is polyacrylate, and comprises one or a combination of potassium polyacrylate, polyacrylate sodium, sodium polymethacrylate and ammonium polyacrylate; and the auxiliary agent is one or a combination of polyaspartic acid, polyaspartate and polyoxyethylene sorbitol anhydride mono-fatty acid ester. The invention further provides a penetration-driving oil recovery agent containing the composition for the penetration-driving oil recovery agent and a preparation method thereof and an application thereof in an oil recovery process. The penetration-driving oil recovery agent provided by the invention is prepared from simple and readily-available raw materials, has low using amount, and particularly has high recovery rate under a low penetration condition.

Description

technical field [0001] The invention relates to a composition for a seepage-displacement type oil recovery agent and a seepage-displacement type oil recovery agent containing the composition for a seepage-displacement type oil recovery agent, and belongs to the technical field of petroleum exploitation. Background technique [0002] At present, most oil fields in the world have entered the middle and late stages of exploitation. After the oil reservoir has undergone primary oil recovery and secondary oil recovery, more than 60% of the oil geological reserves still remain in the rock pores of the oil reservoir. At present, there are many tertiary oil recovery methods, and surfactants have been widely valued in tertiary oil recovery. Because the use of surfactants can reduce the interfacial tension between oil and water, and reduce the retention of residual oil in capillaries, the oil displacement efficiency is higher. Although there are many types of surfactants, due to the c...

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
IPC IPC(8): C09K8/588E21B43/22
Inventor 张翼马德胜朱友益韩大匡王德虎
Owner PETROCHINA CO LTD
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