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Organic silicon water plugging agent and preparation method thereof

A technology of organosilicon and water blocking agent, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of reduced oil recovery, increased cost of water treatment, and reduced formation energy

Inactive Publication Date: 2014-07-23
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase of liquid production directly leads to the reduction of formation energy, the reduction of pumping efficiency of pumping wells, the aggravation of pipeline and equipment corrosion and scaling, the increase of water treatment cost, and the increase of investment costs, which directly affect the production of crude oil and lead to the reduction of ultimate recovery of oil layers. , so water plugging and profile control is imperative

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of above-mentioned organosilicon water blocking agent, comprises the following steps:

[0027] (1), prepare slow-release acid, slow-release acid is prepared by mixing the following mass components: ammonium chloride (NH4Cl) 3.8%, formaldehyde (HCHO) 8.1%, phosphoric acid 2.5%, water 85.6%.

[0028] (2), measuring raw materials

[0029] The volume components of sodium silanolate, organosilicon, and slow-release acid are as follows: sodium silanolate 35-36, organosilicon 5-6, and slow-release acid 58-60;

[0030] The dosage of ethylenediaminetetraacetic acid (EDTA) is 1g / 10ml slow-release acid.

[0031] (3) Mix the measured sodium silanolate and organosilicon, add the weighed ethylenediaminetetraacetic acid and stir thoroughly; add slow-release acid and mix thoroughly to prepare the organosilicon water blocking agent.

[0032] Mix the silicone water shutoff agent with oilfield sewage at a volume ratio of 1:3.5-4, inject it into the well, and hydro...

Embodiment 1

[0034] Organosilicon water blocking agent is formulated with sodium silanolate and organosilicon as the main agent, ethylenediaminetetraacetic acid (EDTA) as an auxiliary agent, and mixed with an appropriate amount of slow-release acid; The volume components are as follows: sodium silanolate 9ml, organosilicon 1.5ml, slow-release acid 15ml; the amount of ethylenediaminetetraacetic acid (EDTA) is 0.15g; wherein: the modulus of sodium silanolate is 3.0; the solid content of organosilicon The slow-release acid is prepared by mixing the following quality components: ammonium chloride (NH4Cl) 3.8%, formaldehyde (HCHO) 8.1%, phosphoric acid 2.5%, water 85.6%.

[0035] The preparation method of organosilicon water blocking agent comprises the following steps:

[0036] (1), prepare slow-release acid, slow-release acid is formulated by mixing the following mass components: 38g NH 4 Cl (3.8%), 81g HCHO (8.1%), 25g phosphoric acid (2.5%), 856g (85.6%) water.

[0037] (2) Measure 9ml of...

Embodiment 2

[0042] The difference from Example 1 is that the volume components of sodium silanolate, organosilicon, and slow-release acid are as follows: 7.5 ml of sodium silanolate, 1.4 ml of organosilicon, and 15 ml of slow-release acid.

[0043] Heat the prepared mixture in a water bath at 60°C. After 8 hours, the solution gels, and the gel strength is good. When the gel is poured, only a small meniscus is formed and becomes quite rigid. .

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Abstract

The invention belongs to the field of oilfield chemistry, and in particular relates to an organic silicon water plugging agent and a preparation method thereof. The organic silicon water plugging agent is used for thermal production wells and horizontal wells. The organic silicon water plugging agent is prepared by taking sodium siliconate and organic silicon as main agents, taking ethylenediamine tetraacetic acid as an auxiliary agent, and mixing and batching by adding an appropriate amount of sustained-release acid, wherein sodium siliconate, organic silicon and sustained-release are as follows in parts by volume: 25-36 parts of sodium siliconate, 5-6 parts of organic silicon and 58-68 parts of sustained-release acid; and the amount of ethylenediamine tetraacetic acid, added into 10ml of the sustained-release acid, is 1g. The preparation method of the organic silicon water plugging agent comprises the steps of (1) preparing sustained-release acid; and (2) measuring raw materials; (3) mixing measured sodium siliconate and organic silicon, adding weighed ethylenediamine tetraacetic acid, and fully stirring; adding sustained-release acid, and fully mixing to prepare the organic silicon water plugging agent. The organic silicon water plugging agent disclosed by the invention has a water plugging rate of more than 90%, can be used for resisting 150 DEG C of high temperature, has a water plugging validity period of more than 90 days, and has hydrolysis and curing properties.

Description

technical field [0001] The invention belongs to the field of oil field chemistry, and in particular relates to an organosilicon water shutoff agent and a preparation method thereof; Hirai. Background technique [0002] At present, most domestic oil fields have entered the development stage of high water cut or extremely high water cut: liquid production increases, oil production decreases, and water cut exceeds 80%, even as high as 90%. The increase of liquid production directly leads to the reduction of formation energy, the reduction of pumping efficiency of pumping wells, the aggravation of pipeline and equipment corrosion and scaling, the increase of water treatment cost, and the increase of investment costs, which directly affect the production of crude oil and lead to the reduction of ultimate recovery of oil layers. , so water plugging and profile control is imperative. [0003] After years of development, the water shutoff and profile control technologies used in o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/506
CPCC09K8/5045C09K8/506
Inventor 侯影飞王代流李学佼屈人伟谷雅雅孔瑛
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)