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Compound blockage relieving agent and using method thereof

A composite plugging remover and plugging remover technology, applied in chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve problems such as injury, low conversion rate of chlorine dioxide, explosion of the human respiratory system, etc. Achieve the effect of reducing construction cost, simple operation and wide application

Inactive Publication Date: 2009-12-23
XIAN JINGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The acid activator activation construction process has the following disadvantages: 1. Segmented injection, generally segmented alternate injection, injecting various agents in sequence in multiple cycles
2. The acid solution of the activator is generally a strong acid, which is generally used after being diluted with water. It takes several hours to fully activate chlorine dioxide under the condition that the pH value is not very low, and the conversion rate of chlorine dioxide is low.
4. If chlorine dioxide is activated on the ground and injected into the formation, there is a danger of chlorine dioxide gas explosion and chlorine dioxide will cause damage to the human respiratory system

Method used

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  • Compound blockage relieving agent and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A composite plugging agent, consisting of agent A, agent B and agent C, agent A is a chlorine dioxide solution; agent B is a non-acid solid activator system; agent C is an organic phosphine corrosion inhibitor that resists chlorine dioxide oxidative corrosion , the mass ratio of agent A, agent B and agent C is 100:4:30

[0030] Agent A is a 2% stable chlorine dioxide solution in parts by mass.

[0031] B agent is made up of organic isocyanurate, inorganic sulfate and chlorate, and the organic isocyanurate in B agent is sodium dichloroisocyanurate, and its mass accounts for 40% of B agent; The inorganic sulfate is magnesium sulfate, and its mass accounts for 25% of agent B, and the chlorate is calcium chloride, and its mass accounts for 35%.

[0032] Agent C is 25% hexamethylenediamine tetramethylene phosphonic acid in parts by mass.

[0033] Its specific usage method is:

[0034] The first step is to inject the pre-liquid water 7T downhole through the casing;

[003...

Embodiment 2

[0043] A composite plug-removing agent, consisting of agent A, agent B and agent C, agent A is a chlorine dioxide solution; agent B is a non-acid solid activator system; agent C is an anti-oxidation corrosion inhibitor, and agent A, agent B The mass ratio of agent and agent C is 100:5:30.

[0044]Agent A is a 3% stable chlorine dioxide solution in parts by mass.

[0045] Agent B is composed of organic isocyanurate, inorganic sulfate and chlorate. The organic isocyanurate in agent B is trichloroisocyanuric acid, and its mass accounts for 45% of agent B; Sulphate is sodium sulfate, and its quality accounts for 30% of B agent. Chlorate is calcium chloride, which accounts for 25% by mass.

[0046] Agent C is 2-phosphonic acid butane-1,2,4-tricarboxylic acid with a mass fraction of 35%.

[0047] Its specific usage method is:

[0048] The first step is to inject 6T of pre-liquid water downhole through the casing;

[0049] The second step is to select the amount of plugging agen...

Embodiment 3

[0057] A composite plug-removing agent, consisting of agent A, agent B and agent C, agent A is a chlorine dioxide solution; agent B is a non-acid solid activator system; agent C is an anti-oxidation corrosion inhibitor, and agent A, agent B The mass ratio of agent and agent C is 100:6:20.

[0058] Agent A is a 2.5% stable chlorine dioxide solution in parts by mass.

[0059] B agent is made up of organic isocyanurate, inorganic sulfate and chlorate, and the organic isocyanurate in B agent is sodium dichloroisocyanurate, and its mass accounts for 43% of B agent; The inorganic sulfates are sodium bisulfate and magnesium sulfate, and their mass accounts for 25% and 5% of the B agent respectively. Chlorate is calcium chloride, which accounts for 27% by mass.

[0060] Agent C is 35% hexamethylenediamine tetramethylene phosphonic acid in parts by mass.

[0061] Its specific usage method is:

[0062] The first step is to inject 5T of pre-liquid water downhole through the casing; ...

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Abstract

The invention provides a compound blockage relieving agent, which comprises an A agent, a B agent and a C agent. The A agent is chlorine dioxide solution, and is chlorite or chlorate; the B agent is in a non-acid solid active agent system, and comprises organic oisocyanuric acid salt, inorganic sulfate and chlorate; and the C agent is an organic inhibitor for resisting oxidation corrosion of chlorine dioxide, and is organic phosphine. A using method comprises the following steps: the compound blockage relieving agent which is generated through fast activation aboveground and is based on the chlorine dioxide is wholly injected into an oil well formation fin one step through a bushing, then water is injected through the bushing, the chlorine dioxide compound blockage relieving agent with higher concentration after being activated is extruded into a perforation section, polymer of an oil layer is in oxidative degradation, and various bacterial microorganisms bred by raw oil and sulfide are oxidized and completely killed, thereby the invention achieves the purpose of eliminating blockage, has the characteristic that faint yellow liquid based on the chlorine dioxide of high concentration is generated through the fast activation, has no large quantity of chlorine dioxide gas escape, and can be widely used for fields such as oil well blockage relieving, water well blockage relieving, and the like.

Description

technical field [0001] The invention relates to an oil well plug-removing agent used in oil field production, in particular to a composite plug-removing agent and a using method thereof. Background technique [0002] During the development and production of oil fields, a large number of chemicals are used in various processes such as drilling and oil and gas extraction, mainly minerals, natural materials, organic substances, inorganic substances, polymer materials, etc. With the injection of chemicals, due to the influence of reservoir properties and many factors in the development process, oil and gas layers near wellbore will be blocked to varying degrees. There are a large number of bacterial production and high polymer deposition in the oil well formation, which will cause formation pore blockage and equipment blockage, resulting in an increase in the injection pressure of the injection well and a decrease in the injection rate, making it difficult to inject, resulting i...

Claims

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Application Information

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IPC IPC(8): C09K8/52C09K8/524E21B37/06
Inventor 李佐东马明珠朱伯龙任清洁
Owner XIAN JINGDA CHEM
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