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Corrosion inhibition bactericide for normal-pressure shale gas field

A technology of fungicides and corrosion inhibitors, applied in the field of slow-release fungicides for atmospheric shale gas fields, can solve the problems of fungicides polluting the environment, inability to completely kill microorganisms, and poor compatibility, and achieve the goal of delaying corrosion Effect

Inactive Publication Date: 2021-09-03
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the fungicides used will pollute the environment, and when different microorganisms coexist, the polysaccharide gum generated will protect the flora, and the fungicides are not easy to penetrate, and cannot completely kill all microorganisms
If the corrosion inhibitor and fungicide are used together, there is a problem of poor compatibility between the two

Method used

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  • Corrosion inhibition bactericide for normal-pressure shale gas field
  • Corrosion inhibition bactericide for normal-pressure shale gas field

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A corrosion inhibitor and bactericide for normal pressure shale gas fields, comprising the following components in parts by weight:

[0020] Component A: 12 parts of didecyl dimethyl ammonium chloride, 7 parts of sodium dihydrogen phosphate, 1.0 parts of sodium dodecylsulfonate, 80 parts of water I;

[0021] Component B: 5.4 parts of sodium chlorite, 1 part of sodium chloride, and 93.6 parts of water II.

[0022] The preparation steps are as follows:

[0023] (1) Add 12 parts of didecyldimethylammonium chloride, 7 parts of sodium dihydrogen phosphate and 1.0 part of sodium dodecylsulfonate into 80 parts of water I, stir and dissolve at room temperature, and store at room temperature;

[0024] (2) Add 5.4 parts of sodium chlorite and 1 part of sodium chloride to 93.6 parts of water II, stir and dissolve at room temperature, and store at 5-10°C.

[0025] Mix component A and component B at a weight ratio of 1:1 before use.

Embodiment 2

[0027] A corrosion inhibitor and bactericide for normal pressure shale gas fields, comprising the following components in parts by weight:

[0028] Component A: 13 parts of dodecyl dimethyl benzyl ammonium chloride, 7 parts of sodium dihydrogen phosphate, 1.0 parts of sodium dodecylsulfonate, 79 parts of water I;

[0029] Component B: 5.4 parts of sodium chlorite, 1 part of sodium chloride, and 93.6 parts of water II.

[0030] The preparation steps are as follows:

[0031] (1) Add 13 parts of dodecyldimethylbenzyl ammonium chloride, 7 parts of sodium dihydrogen phosphate and 1.0 part of sodium dodecylsulfonate to 79 parts of water I, stir and dissolve at room temperature, and save;

[0032] (2) Add 5.4 parts of sodium chlorite and 1 part of sodium chloride to 93.6 parts of water II, stir and dissolve at room temperature, and store at 5-10°C.

[0033] Mix component A and component B at a weight ratio of 1:1.2 before use.

Embodiment 3

[0035] A corrosion inhibitor and bactericide for normal pressure shale gas fields, comprising the following components in parts by weight:

[0036] Component A: 15 parts of dodecyl dimethyl benzyl ammonium chloride, 9 parts of sodium dihydrogen phosphate, 2 parts of sodium dodecylsulfonate, 74 parts of water I;

[0037] Component B: 6.8 parts of sodium chlorite, 2 parts of sodium chloride, and 91.2 parts of water II.

[0038] The preparation steps are as follows:

[0039] (1) Add 12 parts of dodecyldimethylbenzyl ammonium chloride, 7 parts of sodium dihydrogen phosphate and 1.0 part of sodium dodecylsulfonate to 80 parts of water I, stir and dissolve at room temperature, and then save;

[0040] (2) Add 5.5 parts of sodium chlorite and 1.5 parts of sodium chloride to 93 parts of water II, stir and dissolve at room temperature, and store at 5-10°C.

[0041] Mix component A and component B at a weight ratio of 1:1.2 before use.

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Abstract

The invention relates to a corrosion inhibition bactericide for a normal-pressure shale gas field, and belongs to the technical field of oil and gas development. The corrosion inhibition bactericide for the normal-pressure shale gas field is composed of a component A and a component B. The component A comprises the following components in parts by weight: 10-15 parts of a corrosion inhibitor, 6-9 parts of sodium dihydrogen phosphate, 1-2 parts of a surfactant and 74-83 parts of water I; and the component B is prepared from the following components in parts by weight: 4.5 to 6.8 parts of sodium chlorite, 1 to 2 parts of sodium chloride and 94.5 to 91.2 parts of water II. The bactericide disclosed by the invention not only can play a role in corrosion inhibition, but also can effectively kill microorganisms in a production system, so that the bactericide has two effects.

Description

technical field [0001] The invention belongs to the technical field of oil and gas development, and in particular relates to a slow-release fungicide for normal-pressure shale gas fields. Background technique [0002] Shale gas refers to organic matter-rich, mature dark mud shale or high-carbon mud shale, which has a certain commercial value due to the adsorption of organic matter or the existence of fractures and matrix pores in the rock, so that it is stored and preserved. , pyrolysis and natural gas of mixed origin. In the process of oil and gas extraction, due to the injection of water, drilling fluid, fracturing fluid and other fluids, the oil and gas extraction system will bring sulfate reducing bacteria (SRB). Sulfate-reducing bacteria are microorganisms that grow and reproduce in large quantities in anaerobic or hypoxic environments, which can convert SO 4 - converted to H 2 S. h 2 The existence of S will lead to the acidification of oilfield water, causing loc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/54A01N59/26A01N59/00A01N59/08A01N33/12A01P1/00
CPCC09K8/54A01N59/26A01N59/00A01N59/08A01N33/12
Inventor 房大志张宁波李佳欣杨修直周成香程旭卓亦然程泽虎徐海涛王祁邱建玲徐壮举刘波徐涛
Owner CHINA PETROLEUM & CHEM CORP
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