Solid foaming agent for carrying over formation fluid from gas and gas condensate wells

FIELD: oil and gas production.

SUBSTANCE: solid foaming agent containing, wt %: carboxymethylcellulose 15-25, sodium sec-alkyl sulfate 5-15 and sodium sulfonate 25-35 (both anionic surfactants), additionally contains: sodium silicate 3-7, sodium carbonate 2-4, disodium ethylenediaminetetraacetate as complexone 1-3, and foaming-enhancing detergent - the rest.

EFFECT: increased efficiency in carrying over formation fluid from bottom of gas and gas condensate wells.

1 tbl

 

The present invention relates to the field of gas and gas condensate, and in particular to compositions for removal of the reservoir fluid from downhole gas and gas condensate wells.

Known solid foaming agent for removal of the reservoir fluid from the borehole bottom [1]. Solid foaming agent contains, wt%: sulfate black liquor - 10-15, sodium hexametaphosphate - 8-10, pyridine KPI - 1-68, aluminum powder 8-10, caustic soda 1-2 and dry ice - else.

The disadvantage of this structure is the low efficiency of removal of mineralized fluids.

The closest in technical essence and the achieved result is a solid foaming agent for the removal of the reservoir fluid from the gas and gas condensate wells [2].

Solid foaming agent contains, wt%: anion active surface active substance 10-60, water-soluble salt of hydrofluoric acid 7-56, carboximetilzellulozu 6-12 and water 27-29.

The disadvantage of the solid foaming agent is the presence in its composition of a water-soluble salt of hydrofluoric acid. Water-soluble salt of hydrofluoric acid in the interaction with water-soluble salts of calcium and magnesium form a poorly soluble in water, precipitation of the fluorides of calcium and magnesium, which has a negative effect on foam. In addition, the known solid foaming agent maluafiti is n when setting out vodokanalstroi mixture.

The aim of the present invention is to increase the efficiency of removal of the reservoir fluid and vodokanalstroi mixture of gas and gas condensate wells.

This objective is achieved in that the known solid foaming agent for removal of the reservoir fluid of gas and gas condensate wells containing the carboxymethylcellulose and the foaming agent is anionic surfactant, characterized in that it additionally contains sodium silicate and sodium carbonate, complexing agents is the disodium salt of ethylenediaminetetraacetic acid, power flushing - detergent, and as a foaming agent - verucasalt sodium sulfonate sodium in the following ratio, wt.%:

Carboxymethylcellulose 15-25

Verucasalt sodium 5-15

Sulfonate sodium 25-35

Sodium silicate 3-7

Sodium carbonate 2-4

The disodium salt of the Ethylenediamine-

tetraoxane acid 1-3

Detergent - rest

Just 100

Carboxymethylcellulose is a binder and antiretroviral.

Anionic surfactant - verucasalt sodium sulfonate sodium are active foam

Sodium silicate and sodium carbonate are stabilizers, pH and water softeners.

The disodium salt of ethylenediaminetetra kusnoy acid the complexing agents. Provides translation of cations of polyvalent metals in a soluble state and, consequently, improves the conditions of foaming.

Detergent - amplifier foam provides the necessary rheology of foam.

Offer solid foaming agent is produced by extrusion of this mixture components.

Example. Prepared mixture of dry ingredients: carboxymethylcellulose, sulfonate sodium, sodium carbonate, disodium salt of ethylenediaminetetraacetic acid, determinations detergent type “Sorti”. Then added to the mixture liquid commodity products liquid detergents “Progress” (aqueous solution of veracolate sodium) and glass sodium-potassium liquid (aqueous solution of sodium silicate).

Formulated composition of surface-active substances (surfactants) pre-mixed, and then subjected to extrusion to obtain a homogeneous rods extending from the die of the extruder. The obtained solid rods surfactants are delivered to the bottom of the borehole using known equipment.

The number of terminals required for input into the borehole, the ratio of their inputs is determined for each well separately and depends on the characteristics of its operation (pressure, volume submitted fluid, the degree mineralize the AI formation water, the content of gas condensate, the ratio of the simultaneously-produced water and hydrocarbon condensate in the reservoir fluid and other).

The ratio of the foam is determined as follows. Preparing the solution proposed composition of the nominal concentration. The solution is placed in the beaker and mixed at the mixer type “Voronezh”. At the end of the mixing is determined by the ratio of the foam in a known manner.

Composition, wt.%:

1. Carboxymethylcellulose 27

Verucasalt sodium 3

Sulfonate sodium 22

Sodium silicate 8

Sodium carbonate 1

The disodium salt of the Ethylenediamine-

tetraoxane acid 4

Detergent - rest

Just 100

2. Carboxymethylcellulose 25

Verucasalt sodium 5

Sulfonate sodium 25

Sodium silicate 7

Sodium carbonate 2

Dimitrieva salt Ethylenediamine-

tetraoxane acid 3

Detergent - rest

Just 100

3. Carboxymethycellulose 25

Verucasalt sodium 15

Sulfonate sodium 25

Sodium silicate 3

Sodium carbonate 4

The disodium salt of the Ethylenediamine-

tetraoxane acid 1

Detergent - rest

Just 100

4. Carboxymethylcellulose 15

Verucasalt sodium 5

Sulfonate sodium 35

Sodium silicate 7

Sodium carbonate 2

The disodium salt of the Ethylenediamine-

tetraoxane acid 3

Deterg the NT - the rest

Just 100

5. Carboxymethylcellulose 15

Verucasalt sodium 15

Sulfonate sodium 35

Sodium silicate 3

Sodium carbonate 4

The disodium salt of the Ethylenediamine-

tetraoxane acid 1

Detergent - rest

Just 100

6. Carboxymethylcellulose 13

Verucasalt sodium 17

Sulfonate sodium 38

Sodium silicate 2

Sodium carbonate 5

The disodium salt of ethyleneamine-

tetraoxane acid 0

Detergent - rest

7. Prototype

Anionic surfactant 43

Water-soluble salt of hydrofluoric acid 20

Carboxymethylcellulose 10

Water 27

The results of the determinations of the ratio of foam (To) of the proposed formulations in comparison with the prototype shown in the table.

The obtained data show that the effectiveness of the proposed foaming agent, defined as the value of K (foam), higher than that of the prototype.

The use of the proposed solid foam will increase the efficiency of removal of the reservoir fluid of gas and gas condensate wells, which will ensure the stability of wells and increase gas production.

Sources of information:

1. Speaker of the USSR № 1587178, CL E 21 In 43/00, publ. 1990, IB No. 31.

2. Speaker of the USSR № 1354812, CL E 21 In 21/14, 26.02.1986,

< num="99"> Solid foaming agent for removal of the reservoir fluid of gas and gas condensate wells containing the carboxymethylcellulose and the foaming agent is anionic surfactant, characterized in that it additionally contains sodium silicate and sodium carbonate, complexing agents is the disodium salt of ethylenediaminetetraacetic acid, power flushing - detergent, and as a foaming agent - verucasalt sodium sulfonate sodium in the following ratio, wt. %:

Carboxymethylcellulose 15-25

Verucasalt sodium 5-15

Sulfonate sodium 25-35

Sodium silicate 3-7

Sodium carbonate 2-4

The disodium salt of the Ethylenediamine-

tetraoxane acid 1-3

Detergent Else



 

Same patents:

The invention relates to the drilling of oil and gas wells in high-permeability gas reservoirs and can be used when posting wells in difficult mining and geological conditions, characterized by the complete absorption of drilling fluid, causing Gazpromavia, which cannot be eliminated in a standard way

Drilling muds // 2230092
The invention relates to a method of drilling wells in subterranean formations containing oil, gas or other minerals, with the purpose of extraction and production of these minerals

The invention relates to the oil and gas industry and is intended to remove the fluid with a salinity of up to 200 g/l and a content of gas condensate in the mixture up to 50% with low-temperature downhole wells, mostly in the late stages of field development

The invention relates to the drilling, development and operation of wells in gas condensate fields and is designed for safe working practices during the development wells
The invention relates to the field of oil and gas industry, and in particular to methods of opening the wells producing oil and gas horizons, and is intended for use as on the newly developed oil and gas fields and fields under development

The invention relates to oil and gas production, in particular technologies for intensification and repair of wells using coiled tubing equipment and installation of the discharge gas (UNG)

The invention relates to the drilling of oil and gas wells, vertical and inclined in the high-permeability fractured gas reservoirs with gradient formation or pore pressure mainly 0,002-0,009 MPa/m

The invention relates to the drilling of oil and gas wells, in particular, to isolate zones of absorption in drilling the well

The invention relates to the oil and gas industry and can be used in the drilling and development of wells with the use of aerated drilling fluids

The invention relates to the mining industry, namely, to open development of mineral deposits and can be used to remove water and sludge from the wells before placing them in the charger explosives

The invention relates to the field of gas and gas condensate, namely the removal vodokanalstroi mixture from the well

The invention relates to the field of gas and gas condensate, namely the removal vodokanalstroi mixture from the wells containing produced water and gas condensate, especially from wells with abnormally low formation pressure

The invention relates to the oil and gas industry and is intended to remove the fluid with a salinity of up to 200 g/l and a content of gas condensate in the mixture up to 50% with low-temperature downhole wells, mostly in the late stages of field development

The invention relates to the field of oil and gas, in particular liquids for perforating and plugging of wells

The invention relates to the oil and gas industry, in particular, compositions for secondary opening heterogeneous permeability seal off formations perforation in the conditions of abnormally low formation pressure,

The invention relates to the oil and gas industry, in particular foaming compositions for plugging wells during repair work in conditions of abnormally low formation pressure,

The invention relates to the oil and gas industry, in particular foaming compositions, and can be used for plugging wells during repair work in conditions of abnormally low formation pressure,

The invention relates to the production of gas, in particular foaming vodokanalstroi mixture with high, more than 70%, the content of gas condensate

The invention relates to the oil industry, in particular to the foamable compositions of the three-phase foams for use as drilling fluids under conditions of abnormally low formation pressure during the primary opening of the productive deposits of oil, gas and capital repair of wells

The invention relates to oil and gas industry and can be used, in particular, to remove the saline formation water and their mixtures with condensate from stripper gas and gas condensate wells

FIELD: oil and gas production.

SUBSTANCE: solid foaming agent containing, wt %: carboxymethylcellulose 15-25, sodium sec-alkyl sulfate 5-15 and sodium sulfonate 25-35 (both anionic surfactants), additionally contains: sodium silicate 3-7, sodium carbonate 2-4, disodium ethylenediaminetetraacetate as complexone 1-3, and foaming-enhancing detergent - the rest.

EFFECT: increased efficiency in carrying over formation fluid from bottom of gas and gas condensate wells.

1 tbl

Up!