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

Low-power depolymerization emulsification viscosity reducer for heavy oil cold production and preparation method thereof

An emulsifying viscosity-reducing, low-power technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem of not having a good emulsifying viscosity-reducing agent system, and achieve clean process, no pollution, easy product, and compounding. simple craftsmanship

Active Publication Date: 2020-01-10
CHINA PETROLEUM & CHEM CORP +1
View PDF11 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used water-soluble viscosity reducing system is mainly used in strong dynamic environments such as wellbore lifting and pipeline transportation. There is no good emulsified viscosity reducing system for low dynamic environments under reservoir conditions.

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
  • Low-power depolymerization emulsification viscosity reducer for heavy oil cold production and preparation method thereof
  • Low-power depolymerization emulsification viscosity reducer for heavy oil cold production and preparation method thereof
  • Low-power depolymerization emulsification viscosity reducer for heavy oil cold production and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Embodiment 1: Viscosity reducer D 1 and its preparation method

[0074] (1) Viscosity reducer D 1 The composition and its mass components are as follows:

[0075] Polyoxyethylene grafted polyacrylamide 0.1%;

[0076] Crown ether surfactant 40%;

[0077] Water 59.9%.

[0078] Described polyoxyethylene graft polyacrylamide, its molecular formula is as follows:

[0079]

[0080] Described crown ether surfactant, its general structural formula is as follows:

[0081]

[0082] where R is C 7 ~C 12 straight-chain alkyl groups.

[0083] (2) Viscosity reducer D 1 The preparation method is as follows:

[0084] ① First, weigh the crown ether surfactant and water, and stir for 10 minutes at a temperature of 30°C, a stirring rate of 100 rpm, and normal pressure to obtain a uniform and transparent aqueous solution;

[0085] ② Slowly add polyoxyethylene grafted polyacrylamide to the above aqueous solution, heat up to 60°C, stir at 300rpm for 1h, then cool to room tem...

Embodiment 2

[0086] Embodiment 2: Viscosity reducer D 2 and its preparation method

[0087] (1) Viscosity reducer D 2 The composition and its mass components are as follows:

[0088] Polyoxyethylene grafted polyacrylamide 1.0%;

[0089] Crown ether surfactant 45%;

[0090] Water 54%.

[0091] Described polyoxyethylene graft polyacrylamide, its molecular formula is as follows:

[0092]

[0093] Described crown ether surfactant, its general structural formula is as follows:

[0094]

[0095] (2) Viscosity reducer D 2 The preparation method is as follows:

[0096] ① First, weigh the crown ether surfactant and water, and stir for 12 minutes at a temperature of 32°C, a stirring rate of 120 rpm, and normal pressure to obtain a uniform and transparent aqueous solution;

[0097] ② Slowly add polyoxyethylene grafted polyacrylamide to the above aqueous solution, raise the temperature to 65°C, stir at a rate of 350rpm, and stir for 1.2h, then cool to room temperature to obtain the visco...

Embodiment 3

[0098] Embodiment 3: Viscosity reducer D 3 and its preparation method

[0099] (1) Viscosity reducer D 3 The composition and its mass components are as follows:

[0100] Polyoxyethylene grafted polyacrylamide 2.5%;

[0101] Crown ether surfactant 52%;

[0102] Water 45.5%.

[0103] Described polyoxyethylene graft polyacrylamide, its molecular formula is as follows:

[0104]

[0105] Described crown ether surfactant, its general structural formula is as follows:

[0106]

[0107] where R is C 7 ~C 12 of alkylamides.

[0108] (2) Viscosity reducer D 3 The preparation method is as follows:

[0109] ① First, weigh the crown ether surfactant and water, and stir for 13 minutes at a temperature of 35°C, a stirring rate of 200 rpm, and normal pressure to obtain a uniform and transparent aqueous solution;

[0110] ② Slowly add polyoxyethylene grafted polyacrylamide to the above aqueous solution, heat up to 62°C, stir at 320rpm, stir for 1.5h, and then cool to room temp...

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
Densityaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a viscosity reducer used in a heavy oil recovery process, and particularly relates to a low-power depolymerization emulsification viscosity reducer for heavy oil cold production and a preparation method thereof. The viscosity reducer is prepared by compounding 0.1-10wt% of polyoxyethylene grafted polyacrylamide, 40-60wt% of a crown ether surfactant and the balance water. The viscosity reducer has strong capability of heavy oil depolymerization emulsification under a low-power condition, and under the conditions of a rotation speed of 50rpm or below, a use concentrationof 0.1wt% or below, a temperature of 50DEG C and a stirring time of 1min or below, the viscosity of the heavy oil with a viscosity exceeding 10000mPa.S can be reduced by 99.0% or more, the viscosity of the heavy oil with a viscosity of 5000-10000mPa.S can be reduced by 98.0% or more, and the viscosity of the heavy oil with a viscosity of 1000-5000mPa.S can be reduced by 95% or above, and the problem that the seepage power of conventional emulsifiers can hardly emulsify heavy oil under an oil reservoir condition is effectively solved.

Description

technical field [0001] The invention relates to a viscosity reducer used in the process of heavy oil exploitation, in particular to a viscosity reducer capable of depolymerizing and emulsifying heavy oil under low power conditions and a preparation method thereof. Background technique [0002] Heavy oil resources account for a considerable proportion of the world's oil and gas resources. According to statistics, the reserves of heavy oil, super heavy oil and natural bitumen in the world are about 100 billion tons. Big countries rich in heavy oil resources include Canada, Venezuela, the United States, China, Indonesia, etc. Their geological reserves of heavy oil and tar sand resources are about 400-600 billion tons, and their annual output of heavy oil is as high as 127 million tons. [0003] The solid components in heavy oil are mainly paraffin, asphaltenes and colloids. When the concentration of these solid substances in crude oil is relatively large, the crude oil has obv...

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): C09K8/584C09K8/588C09K8/60C09K8/88
CPCC09K8/584C09K8/588C09K8/602C09K8/88
Inventor 张宗檩汪庐山郑万刚谢志勤于田田杨斌张学超何旭张岩王志敏
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