Crude oil emulsifier for water shutoff of oil well and preparation method and application of crude oil emulsifier

A technology of oil well water plugging and emulsifier, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well parts, etc. It can solve the problems of low emulsification viscosity and inability to adapt to high-strength water plugging, and achieve high emulsification viscosity, The effect of reducing water waste and saving production costs

Active Publication Date: 2012-09-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the changes in the properties of crude oil and the production site, the emulsifier has low emulsification viscosity and cannot meet the requi

Method used

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  • Crude oil emulsifier for water shutoff of oil well and preparation method and application of crude oil emulsifier
  • Crude oil emulsifier for water shutoff of oil well and preparation method and application of crude oil emulsifier
  • Crude oil emulsifier for water shutoff of oil well and preparation method and application of crude oil emulsifier

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Example Embodiment

[0041] Example 1

[0042] In order to fully verify the beneficial effect of the present invention, according to the record of CN102061153A in the present invention, a prior art crude oil emulsifier for oil well water plugging is prepared, which is recorded as "original agent". And on the basis of the original agent, oleic acid is further compounded to obtain the crude oil emulsifier for oil well water plugging of the present invention. details as follows:

[0043] Raw agent formula:

[0044] Dimethylamine 60 parts by weight,

[0045] 40 parts by weight of epichlorohydrin,

[0046] 400 parts by weight of water,

[0047] Raw material preparation process:

[0048] According to above-mentioned proportion, the water of dimethylamine and 200 parts by weight is mixed in reactor;

[0049] Divide the epichlorohydrin into four equal parts, and add one part of epichlorohydrin to the common reaction kettle every 2 hours;

[0050] After adding the four parts of epichlorohydrin, let ...

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Abstract

The invention relates to a crude oil emulsifier for water shutoff of an oil well and a preparation method and the application of the crude oil emulsifier. The crude oil emulsifier for water shutoff of the oil well is made of dimethylamine, epichlorohydrin, water and oleic acid. The preparation method of the crude oil emulsifier for water shutoff of the oil well includes the steps: mixing dimethylamine and part of water in a reaction kettle; quartering epichlorohydrin, and adding one quarter of epichlorohydrin into the reaction kettle every one to three hours; and naturally cooling after adding of the epichlorohydrin is completed, adding the rest water, mixing, and adding oleic acid to obtain the crude oil emulsifier for water shutoff of the oil well. The crude oil emulsifier for water shutoff of the oil well is an excellent crude oil emulsifier and capable of greatly improving strength of viscous crude emulsifying water shutoff agent, and has high stability.

Description

technical field [0001] The invention relates to a crude oil emulsifier for oil well water shutoff, a preparation method and application thereof, and belongs to the field of oil well water shutoff agents. Background technique [0002] In the process of oilfield exploitation, due to problems such as water layer channeling, bottom water coning or injection water, edge water intrusion, etc., some oil wells will be prematurely watered or flooded. In order to eliminate or reduce water flooding, control the flow of water in the water-producing layer and change the flow direction of water in the water-flooding oil, and improve the recovery rate of water-flooding oil, it is necessary to seal the water-producing layer on the production well or injection well. The chemical treatment agent used in this operation is called water blocking agent. [0003] Water blocking agent is different from additives such as oil displacement agent and flocculant: [0004] Oil-displacing agent is an ad...

Claims

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Application Information

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IPC IPC(8): C09K8/42E21B33/13
Inventor 高玉军马春宝曹广胜向延安胡贺元王德伟刘广友韩松王静苏野
Owner PETROCHINA CO LTD
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