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Environment-friendly energized oil and water well blocking remover capable of quickly reacting at normal 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: 2020-10-23
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] This embodiment provides an environmentally friendly energized oil and water well plugging remover with rapid response at room temperature, which is used to remove plugging for a water injection well. Including energy base solution 17.0m 3 and Activator 4.0m 3 .

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

[0021] Its construction steps: (1) The main energy agent and the activator are prepared in proportion on the ground, and the pumping equipment is used to squeeze the plugging agent into the formation from the wellhead according to the following steps. (2) First squeeze the energy Main agent, (3) squeeze in quantitative clean water as spacer fluid, (4) squeeze in activator again, (5) shut down the well for 1 hour, (6) open the well head valve to release the pressure until there is no pressure, wash the well with clean water until The wate...

Embodiment 2

[0024] This embodiment provides an environmentally friendly energized oil and water well plugging remover with rapid response at room temperature, which is used to remove plugging for a water injection well. Includes energy base solution 12.6m 3 and Activator 2.0m 3 .

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

[0026] Its construction steps: its construction steps with reference to embodiment 1.

[0027] The implementation effect is detected by means of visual instrument reading at the well site: the oil pressure before the measures 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 , daily water injection volume 15.0m 3 . Implementation effect: The oil pressure of the water injection well h...

Embodiment 3

[0029] This embodiment provides an environmentally friendly energized oil and water well plugging remover with rapid response at room temperature, which is used to remove plugging for an oil well. Including energy base 15.6m 3 and Activator 3.5m 3 .

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

[0031] Its construction steps: its construction steps with reference to embodiment 1.

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

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Abstract

The invention discloses environment-friendly energized oil and water well blocking remover capable of quickly reacting at normal temperature, and relates to the technical field of potential tapping ofold wells of oil fields. The blocking remover comprises an energy main agent and an activator, the energy main agent is urea, sodium nitrite and lauroyl diethanolamine, the activator is aluminum sulfate, and the mass ratio of the energy main agent to the activator is 15-20: 5-10: 1-3: 2-4. The obtained raw materials and reaction liquid are free of dangerous chemicals and are an environment-friendly pollution-free formula system. High-temperature, high-pressure and high-quality foam with the temperature larger than or equal to 100 DEG C and the pressure larger than or equal to 20 MPa is generated through reaction in a closed environment, energy is increased for the stratum through the effects of the high temperature, the high pressure and the high foam, organic scale is dissolved at the high temperature, and movable pollution blockages in the high-pressure flowback stratum are discharged out of a wellhead. The blockage of organic scales and inorganic scales in oil and water wells is removed, a sauna bath type physical blockage removing technology is approximately carried out on the stratum, the operation time is short, the blockage removing validity period is long, and the oil increasing effect is improved by 30%-50%.

Description

technical field [0001] The invention relates to the technical field of tapping the potential of old wells in oil fields, in particular to an environmentally friendly energy-enhancing oil and water well plugging remover with rapid response at normal temperature. Background technique [0002] In the field of oilfield development, normal production oil wells (gas wells) and water injection wells are called old wells. Among them, oil wells (gas wells) are used to extract crude oil and natural gas in formations. After long-term mining, the stratum is deficient, and the water injection wells are rationally arranged to inject clean water in a quantitative manner to replenish the depleted formation energy of the connected 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 clogging of oil flow channels are common. The sources of clogging are divided...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/528E21B37/06
CPCC09K8/524C09K8/528E21B37/06
Inventor 白鹏王毅博牛建宏杨登峰贾珍张文康
Owner 延安市永科石油工程技术服务有限公司
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