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An environmentally friendly energy-enhancing oil and water well plugging remover with rapid response at room temperature

A fast-response, plug-removing agent technology, applied in the direction of wellbore/well components, drilling compositions, chemical instruments and methods, etc., can solve the problems of high toxicity, high damage, single effect of organic and inorganic scales, etc.

Active Publication Date: 2022-07-29
延安市永科石油工程技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the defects of high toxicity, high pollution, high damage, high risk and single effect of removing organic and inorganic scale of "strong acid corrosion type" hydrochloric acid plugging remover

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The present embodiment provides an environmentally friendly energy-enhancing oil and a water well plug-removing agent that reacts quickly at normal temperature, and performs plug-removing operations on a water injection well. Including energy main agent solution 17.0m 3 and Activator 4.0m 3 .

[0020] Wherein, formula mass concentration: energy main agent urea is 20.0%, sodium nitrite is 9.5%, lauroyl diethanolamine is 2.8%; activator aluminum sulfate is 4.0%.

[0021] Its construction steps: (1) The main energy agent and the activator are respectively configured on the ground in proportion, using pumping equipment, and the block removing agent is squeezed into the formation from the wellhead according to the following steps, (2) first squeeze the energy The main agent, (3) squeezed into quantitative clear water as isolation fluid, (4) squeezed into the activator again, (5) shut in the well for 1 hour, (6) opened the wellhead valve to release the pressure to no pressu...

Embodiment 2

[0024] The present embodiment provides an environmentally friendly energy-enhancing oil and a water well plug-removing agent that reacts quickly at normal temperature, and performs plug-removing operations on a water injection well. Including energy main agent solution 12.6m 3 and Activator 2.0m 3 .

[0025] Wherein, formula mass concentration: energy main agent urea is 15.0%, sodium nitrite is 5.7%, lauroyl diethanolamine is 1.2%; activator aluminum sulfate is 2.2%.

[0026] Its construction steps: refer to the construction steps of Example 1.

[0027] The implementation effect is detected by means of intuitive reading instrument at the well site: the oil pressure before the measure is 18.0MPa, and the daily water injection volume is 15.0m 3 , the daily water injection volume is 4.4m 3 ;After the measures, the oil pressure is 13.5MPa, and the daily water injection volume is 15.0m 3 , the daily water injection volume is 15.0m 3 . Implementation effect: The oil pressure ...

Embodiment 3

[0029] The present embodiment provides an environmentally friendly energy-enhancing oil and water well plug-removing agent that reacts quickly at room temperature, and performs plug-removing operations on an oil well. Including energy main agent 15.6m 3 and Activator 3.5m 3 .

[0030] Wherein, formula mass concentration: energy main agent urea is 18.0%, sodium nitrite is 8.3%, lauroyl diethanolamine is 2.1%; activator aluminum sulfate is 3.9%.

[0031] Its construction steps: refer to the construction steps of Example 1.

[0032] The implementation effect is detected by the method of intuitive reading instrument at the well site: the daily fluid production before the measure is 1.5m 3 , the daily oil production is 0.2t, the water content is 85.1%; the daily liquid production after the measures is 8.7m 3 , the daily oil production is 2.6t, and the water content is 65.2%. Implementation effect: Nissan liquid increased by 7.2m 3 , Nissan oil increased by 2.4t.

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Abstract

The invention discloses an environment-friendly energy-enhancing oil and water well blocking agent with rapid reaction at normal temperature, and relates to the technical field of potential tapping of old oilfield wells. The blocking remover includes an energy main agent and an activator, the energy main agent is urea, sodium nitrite and lauroyl diethanolamine, the activator is aluminum sulfate, and its mass ratio is 15-20:5-10:1- 3:2-4. The obtained raw materials and reaction liquid are free of hazardous chemicals, and are an environmentally friendly and non-polluting formula system. The reaction in a closed environment produces high temperature ≥100°C, high pressure ≥20MPa and high-quality foam. The high temperature, high pressure and high foam are used to increase energy for the formation, dissolve organic scale at high temperature, and flow back the movable pollutants in the formation. wellhead. The blockage of organic and inorganic scales in oil and water wells is removed, and a sauna bath-style "physical" plugging removal technology is "approximately" applied to the formation. The operation time is short, the validity period of plugging removal is long, and the oil increase effect is increased by 30%-50%. %.

Description

technical field [0001] The invention relates to the technical field of potential tapping of old wells in oilfields, in particular to an environment-friendly energy-enhancing oil and water well plug-removing agent with rapid response at normal temperature. Background technique [0002] In the field of oilfield development, normal production oil wells (gas-containing wells) and water injection wells are habitually called old wells. Among them, oil wells (gas-containing wells) are used to produce crude oil and natural gas in the formation. If the formation is deficient after long-term exploitation, rationally arrange water injection wells to inject clean water quantitatively to supplement the formation deficient energy connected to the oil wells, so as to maintain stable production and increase production and improve oil and gas recovery. During the long-term exploitation of oil and water wells, periodic pollution and blockage of oil flow channels are common. The sources of bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524C09K8/528E21B37/06
CPCC09K8/524C09K8/528E21B37/06
Inventor 白鹏韦文赵春雨张立原李凯凯贾珍牛建宏
Owner 延安市永科石油工程技术服务有限公司
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