Preparation method and application of amphiphilic graphene oxide thick oil viscosity reducer

A technology of olefin heavy oil and viscosity reducer, which is applied in the field of preparation of amphiphilic graphene oxide heavy oil viscosity reducer, can solve the problems of high cost of oil-soluble viscosity reducer, limited external shear force, environmental impact, etc. Achieve the effects of long-lasting viscosity reduction effect, low cost, and mild operating conditions

Active Publication Date: 2022-01-04
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The essence of the oil-soluble viscosity reducer is some organic substances similar to the molecular structure of crude oil (such as xylene, kerosene, and organic small molecule synthetic copolymers, etc.). It is easy to affect the environment. From the perspective of green development, it is not an ideal path
At the same time, the use cost of oil-soluble viscosity reducer is relatively high, and its disadvantages are obvious from an economic point of view
[0006] Water-soluble viscosity reducer relies on emulsification to achieve viscosity reduction, but the emulsification process is affected by many factors, such as temperature, salinity, shear force, etc., so in different oilfield environments, the same water-soluble viscosity reducer will Show different viscosity-reducing effects, not universally applicable
Secondly, in the actual environment, the external shear force is very limited, and it is difficult to promote the emulsification process without the necessary shear force, which is why most water-soluble viscosity reducers work well in the laboratory environment ( Generally, sufficient shear force can be given in the experimental environment), but the field application is poor

Method used

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  • Preparation method and application of amphiphilic graphene oxide thick oil viscosity reducer
  • Preparation method and application of amphiphilic graphene oxide thick oil viscosity reducer
  • Preparation method and application of amphiphilic graphene oxide thick oil viscosity reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Get 1g of graphene oxide (GO) and disperse it in 100mL of deionized water, and then use ultrasonic shear (30kHz) to process it for 2h to obtain GO nano-dispersion A (average particle size is 200nm), and the average particle size should not exceed 300nm, Otherwise, precipitation will easily occur in the subsequent modification process;

[0053] (2) Weigh 0.01g of octadecylamine and 0.01g of dodecylamine into 100mL of kerosene, and use magnetic stirring (300rpm, 10min) to mix the two evenly to obtain solution B;

[0054] (3) Pour 50mL of solution A into the beaker, then add 0.01g of silane coupling agent (KH550), stir magnetically at 70°C (300rpm, 2h) to mix the two evenly, and then continue to pour 50mL into the beaker Solution B, continue to stir magnetically at 70°C (300rpm, 2h);

[0055] (4) Leave the mixed solution in (3) for 2 hours, then suck out the upper layer of kerosene with a dropper, leaving the layer solution for subsequent use;

[0056] (5) adjust the...

Embodiment 2

[0058] Taking crude oil from a certain block of Shengli Oilfield in China as the research object, the viscosity-reducing performance of the amphiphilic nano-viscosity reducer was tested. The specific crude oil information is shown in Table 1.

[0059] Table 1 Basic information of crude oil used for testing

[0060]

[0061] Crude oil viscosity reduction test steps:

[0062] (1) Pour the 10g amphiphilic graphene oxide thick oil viscosity reducer solution (the concentration of the amphiphilic graphene oxide heavy oil viscosity reducer is 10mg / mL) prepared in embodiment 1 into a 150mL beaker, and then pour 90g Mineralized water of the target oil reservoir, magnetic stirring (300rpm) for 10 minutes to mix the two evenly;

[0063] (2) Take a cleaned 250mL beaker, pour 15g of the solution in (1) into it, and then slowly pour 35g of crude oil into it;

[0064] (3) Slowly mechanically stir the oil-water mixture in (2) at a speed of 6 rpm at the target reservoir temperature of 46°...

Embodiment 3

[0070] Taking crude oil from a certain block of Henan Oilfield in China as the research object, the viscosity-reducing performance of the amphiphilic nano-viscosity reducer was tested. The specific crude oil information is shown in Table 2.

[0071] Table 2 Basic information of crude oil for testing

[0072]

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Abstract

The invention discloses a preparation method and application of an amphiphilic graphene oxide thick oil viscosity reducer, and the amphiphilic graphene oxide thick oil viscosity reducer is obtained by reacting a mixture containing graphene oxide, a hydrophobic modifier, a coupling agent and a template agent. The amphiphilic graphene oxide thick oil viscosity reducer is prepared by modifying graphene oxide with a hydrophobic modifier, so that the amphiphilic graphene oxide thick oil viscosity reducer is hydrophilic on one side and oleophylic on the other side, has the advantages of an oil-soluble viscosity reducer and a water-soluble viscosity reducer, overcomes the defects of the oil-soluble viscosity reducer and the water-soluble viscosity reducer, and is wider in application.

Description

technical field [0001] The invention relates to a preparation method and application of an amphiphilic graphene oxide heavy oil viscosity reducer, belonging to the field of oil and gas field development. Background technique [0002] Viscosity reduction of heavy oil is an effective crude oil production stimulation technology, which is of great significance to improve crude oil recovery efficiency and reduce production cost. At present, heavy oil viscosity reducer has been widely used in many oil fields at home and abroad, and plays a key role in many links. Thick oil viscosity reducer is divided into oil-soluble viscosity reducer and water-soluble viscosity reducer. Among them, the oil-soluble heavy oil viscosity reducer mainly breaks the interaction between heavy oil macromolecules and dissociates the original cross-linked molecular chains into independent oil droplet macromolecules, thereby reducing the viscosity of heavy oil and enhancing its fluidity. Increase the swep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58E21B43/22
CPCC09K8/58E21B43/16C09K2208/10
Inventor 陶震田玉芹赵凤鸣黄顼吴文炜陈士勇吴志连
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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