CN102337103A

CN102337103A - Penetrant for coal-bed flooding

Info

Publication number: CN102337103A
Application number: CN2011101914410A
Authority: CN
Inventors: 程卫民; 聂文; 周刚; 陈连军; 亓玉栋; 吴立荣; 杨俊磊; 崔向飞; 张孝强; 马有营
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2011-07-11
Filing date: 2011-07-11
Publication date: 2012-02-01
Anticipated expiration: 2031-07-11
Also published as: CN102337103B

Abstract

The invention relates to a penetrant for coal-bed flooding. The penetrant comprises the following components by weigh percent: 0.01%-0.10% of sodium dodecyl sulfate, 0.01%-0.10% of sodium diisooctylester sulfosuccinate, 0.01%-0.10% of dodecylbetaine, 0.01%-0.10% of sodium oleoyl methyl ethanesulfonate, 0.1%-1.0% of calcium chloride and the balance of water. By using the penetrant for coal-bed flooding in the invention, the problems that a coal bed is not easily wetted and penetrated by water can be effectively solved, the efficiency of coal-bed flooding is improved, the flooding amount, wetting radius and flooding speed of the coal bed are greatly improved, the production amount of working face coal dust is effectively reduced, accident potential is eliminated, and coal mining efficiency is improved.

Description

Permeate agent is used in a kind of coal seam water infusion

Technical field

The present invention relates to a kind of coal seam water infusion and use chemicaladditives, relate in particular to a kind of coal seam water infusion and use permeate agent.

Background technology

Coal seam water infusion is the important technical that the colliery prevents and treats multiple disaster; Dust-producing amount in the time of can reducing the coal body fragmentation effectively through coal seam water infusion prevents the generation of the outstanding disaster of impulsion pressure, coal and gas, and through increasing the thermal conductivity of coal body; Reduce the coal body temperature, the prevention Period of Coal Seam Spontaneous Combustion.In addition, coal seam water infusion can be softened hard coal body, and drawing speed is accelerated, and improves producing coal amount and efficient.During coal seam water infusion, at first be water under pressure, along coal body crack and macroporous process of osmosis, be the autokinesis that water carries out under physics chemical action such as capillary force and surface phenomena then.Can know that from seepage theory and Surface Physical Chemistry theory liquid wants real wetting coal body to depend primarily on the character of liquid and coal body itself.On liquid properties, the significant parameter that embodies the tensio-active agent wetting ability is a surface tension, and surface tension is low more, is easy to more sprawl, and wetting ability is strong more.In coal seal water-infusion technology, coal body is unmodifiable, and the surface tension that therefore needs to reduce water is to improve water injection rate.Coal seam water infusion for many years facts have proved, because the surface tension of water is bigger, is difficult to penetrate into some low permeability coal seams, so flood effectiveness is relatively poor.

The coal surface-modifying agent is to form the outside adsorption layer of hydrophilic group through the adsorption surface promoting agent to improve its wettability.All in low strength range, the surface tension of solution is significantly reduced, and make the solute big material of the more inner concentration of concentration from the teeth outwards, be called tensio-active agent.Tensio-active agent has two common features, and the one, the amphiphile, amphiphilic molecule on the chemical structure, promptly an end of molecule is hydrophilic, is called hydrophilic polar group, and the other end oleophylic or close gas are called hydrophobic nonpolar group; The 2nd, the aligning of molecule on the solution surface layer state, a promptly hydrophilic end inserts in the water, and a hydrophobic end stretches to air.Because amphiphilic, they can cover the aqueous vapor surface to reduce the surface tension of water as far as possible; Because molecular orientation is arranged, and just can hold more molecule in certain upper layer, it is minimum that surface tension is reduced to.Through the permeate agent that configuration is made up of the different surfaces promoting agent, can reduce the surface tension of water, improve the performances such as wetting, infiltration of water, can reach the wetting radius that increases coal seam water infusion thus, enlarge injection area and improve water injection rate and waterflood injection rate.Therefore should use the strongest, the most effective tensio-active agent of reduction water surface tension ability to use permeate agent as coal seam water infusion.

Literature search through to prior art is found; Lee completely discloses a kind of coal dust inhibitor in patent CN101457137; The main chemical compositions of this coal dust inhibitor is alkyl phenol ether (carbon chain lengths is 8-9, and the EO polymerization degree is 10-15) and dodecylbenzene and AES (AEO).In the coal seam water infusion process, add this coal dust inhibitor, can strengthen the penetrating power of water, obviously shorten the coal seam water infusion time, effectively improve flood effectiveness, reduce the coal dust concentration of coal mining activity environment.But when this type of medicament of application was controlled the coal dust of higher metamorphic grade, often effect was not good enough.

Summary of the invention

The present invention is directed to the deficiency of prior art, aim to provide a kind of surface tension that reduces water, improve water permeate agent is used in the coal seam water infusion of coal seam infiltration and wetting ability,, reduce the probability of occurrence of coal mining accident to improve water injection rate.

Coal seam water infusion according to the invention consists of with permeate agent: by mass percentage; It comprises the sodium laurylsulfonate of following component: 0.01%-0.10%, the sulfo-succinic acid Diisooctyl sodium of 0.01%-0.10%, the empgen BB of 0.01%-0.10%, the oleoyl methylamine ethyl sulfonic acid sodium of 0.01%-0.10% and the calcium chloride of 0.1%-1.0%, and surplus is a water.

Above-mentioned coal seam water infusion becomes with the preferred group of permeate agent: by mass percentage; It comprises the sodium laurylsulfonate of following component: 0.03%-0.05%, the sulfo-succinic acid Diisooctyl sodium of 0.02%-0.03%, the empgen BB of 0.02%-0.03%, the oleoyl methylamine ethyl sulfonic acid sodium of 0.04%-0.06% and the calcium chloride of 0.4%-0.5%, and surplus is a water.

The present invention has following beneficial technical effects:

Permeate agent is used in coal seam water infusion provided by the present invention; Sodium laurylsulfonate wherein, sulfo-succinic acid Diisooctyl sodium, empgen BB and oleoyl methylamine ethyl sulfonic acid sodium all are to have surface-active material; After water-soluble, greatly reduce the surface tension of water; In addition, because Ca ²⁺Ionic exists, and can further strengthen the wettability of the permeate agent aqueous solution through salt effect; After in water, adding a small amount of this permeate agent and reaching working concentration; Can effectively solve the coal seam and be difficult for a difficult problem moistening by water, infiltration; Improve the efficient of coal seam water infusion, made coal seam water infusion amount, wetting radius and waterflood injection rate obtain raising in various degree respectively, effectively reduced the generation of workplace coal dust; Eliminate accident potential, and improved coal mining efficient.

Embodiment

Below will combine specific embodiment, the present invention will be done further detailed description:

Embodiment 1

In 99.35g water, add 0.01g sodium laurylsulfonate, 0.1g sulfo-succinic acid Diisooctyl sodium, 0.1g empgen BB, 0.04g oleoyl methylamine ethyl sulfonic acid sodium and 0.4g calcium chloride, normal temperature stirred 30 minutes down, promptly got coal seam water infusion and used permeate agent.

Embodiment 2

In 98.87g water, add 0.1g sodium laurylsulfonate, 0.01g sulfo-succinic acid Diisooctyl sodium, 0.01g empgen BB, 0.1g oleoyl methylamine ethyl sulfonic acid sodium and 1.0g calcium chloride, normal temperature stirred 50 minutes down, promptly got coal seam water infusion and used permeate agent.

Embodiment 3

In 99.41g water, add 0.03g sodium laurylsulfonate, 0.02g sulfo-succinic acid Diisooctyl sodium, 0.03g empgen BB, 0.01g oleoyl methylamine ethyl sulfonic acid sodium and 0.5g calcium chloride, normal temperature stirred 30 minutes down, promptly got coal seam water infusion and used permeate agent.

Embodiment 4

In 99.74g water, add 0.05g sodium laurylsulfonate, 0.03g sulfo-succinic acid Diisooctyl sodium, 0.02g empgen BB, 0.06g oleoyl methylamine ethyl sulfonic acid sodium and 0.1g calcium chloride, normal temperature stirred 60 minutes down, promptly got coal seam water infusion and used permeate agent.

Embodiment 5

The coal mining workplace carries out rig-site utilization in the star village with permeate agent and permeate agent A commonly used in the market with the coal seam water infusion shown in the embodiment 1-5; Meter readings through being installed on the water injecting pipeline is measured single hole water injection rate and single hole waterflood injection rate; Through the scene wetting radius of the hole observation moistening degree measurement of coal body of drilling, the result is as shown in table 1:

Table 1

Permeate agent	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5	Permeate agent A
							The single hole water injection rate, m ³	62.4	63.2	66.2	64.7	66.7	24.7
The single hole waterflood injection rate, m ³/d	22.5	23.1	22.8	23.4	23.2	12.3
							Wetting radius, m	6.9	7.0	7.5	7.2	7.1	5.1

Can find out that from last table A compares with permeate agent, the single hole water injection rate of the said permeate agent of embodiment 1-5 has improved 153%, 156%, 168%, 162%, 170% respectively; The single hole waterflood injection rate has improved 83%, 88%, 85%, 90%, 87% respectively; Wetting radius has improved 35%, 37%, 47%, 41%, 39% respectively.

Should be understood that; Above-mentioned description to preferred embodiment is comparatively detailed; Do not breaking away under the scope situation that claim of the present invention protects; Can also make various deformation such as replacement, simple combination, these all fall within protection scope of the present invention, and the scope that the present invention asks for protection should be as the criterion with accompanying claims.

Claims

1. permeate agent is used in a coal seam water infusion; It is characterized in that; By mass percentage; It comprises the sodium laurylsulfonate of following component: 0.01%-0.10%, the sulfo-succinic acid Diisooctyl sodium of 0.01%-0.10%, the empgen BB of 0.01%-0.10%, the oleoyl methylamine ethyl sulfonic acid sodium of 0.01%-0.10% and the calcium chloride of 0.1%-1.0%, and surplus is a water.

2. permeate agent is used in coal seam water infusion according to claim 1; It is characterized in that; By mass percentage; It comprises the sodium laurylsulfonate of following component: 0.03%-0.05%, the sulfo-succinic acid Diisooctyl sodium of 0.02%-0.03%, the empgen BB of 0.02%-0.03%, the oleoyl methylamine ethyl sulfonic acid sodium of 0.04%-0.06% and the calcium chloride of 0.4%-0.5%, and surplus is a water.