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Anti-scaling agent for ternary composite drive and its use

A technology of ternary compound and anti-scaling agent, applied in drilling equipment and other directions, can solve the problem of serious scaling of ternary compound oil flooding, and achieve the effect of good anti-corrosion effect.

Inactive Publication Date: 2003-04-09
陈新萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the injection water uses surface water, the hardness of the water is 200-500mg / L (calculated as CaCO 3 Calculated), the salinity of groundwater is higher by 2000-3000mg / L (calculated as CaCO 3 count), under strong alkaline conditions, the scaling of ASP flooding is quite serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1-2

[0019] Example 1-2 prepares the antifouling agent of the present invention and its percentage content is shown in Table 1.

[0020] Preparation method: first add water, maleic anhydride, sodium hypophosphite, and catalyst into the reaction kettle, seal the reaction kettle tightly: mix hydrogen peroxide and acrylic acid, put them into the high-level tank and drop them into the reaction kettle, after the dropwise addition The anti-scaling agent can be obtained after cooling down and discharging. The specific preparation process conditions are shown in Table 2.

[0021] The main physical and chemical indicators of the product of the invention: the appearance is a yellow liquid, the density is 1:1-1:3kg / L, the solid content is ≥ 30%, and the unreacted monomer is ≤ 0.8%.

example 3-4

[0023] The products prepared in Example 1 and Example 2 are applied in the field, and the antiscaling effect is shown in Table 3.

[0024] example

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PUM

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Abstract

The present invention features that after water, cis-butenedioic anhdride, sodium hypophosphorite, the catalyst comprising ferrous sulfate and hexahydrated cobalt dichloride are added into reactor and mixed homogeneously, the mixture of acrylic acid and hydrogen peroxide is dropped into the reactor and reacted at certain temperature to obtain the required anti-scaling agent. The anti-scaling agent of the present invention is used in ternary composite reservior oil displacing process and can result in anti-scaling rate as high as 90% and excellent anticorrosive effect.

Description

technical field [0001] The invention relates to an anti-scaling technology for oil recovery in an oil field, more precisely, it is an anti-scaling agent for three-element compound flooding for tertiary oil recovery. Background technique [0002] In the late stage of oil exploitation, oil displacement agents are usually injected in order to enhance the recovery rate. Commonly used oil displacement agents include ternary composite oil displacement agents including polymers (polyacrylamide), surfactants, and alkalis. However, because the injection water uses surface water, the hardness of the water is 200-500mg / L (calculated as CaCO 3 Calculated), the salinity of groundwater is higher by 2000-3000mg / L (calculated as CaCO 3 In terms of calculation), under strong alkaline conditions, the fouling of ASP flooding is quite serious. Conventional antiscalants are used under neutral conditions. Contents of the invention [0003] The object of the present invention is to provide an...

Claims

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Application Information

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Inventor 陈新萍王宝辉
Owner 陈新萍
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