Composition for preventing deposition asphaltoresinparaffin substances in oil

 

(57) Abstract:

The invention relates to the field of oil production, in particular to solid compositions for preventing deposits asphaltoresinparaffin (ASPV)substances in the conditions of production of anhydrous or paleobotany oil (20%) of the wells both low and high reservoir pressure and at various temperatures. The composition contains powdered synthetic detergent (SMS), including not less than 12 wt.% surface-active substances, at least 10.5 wt. % phosphoric acid salts in terms of P2ABOUT5and at least 2 wt.% sodium silicate in terms of SiO2or powder technical cleanser (TMS), including not less than 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2ABOUT5and not less than 1.7 wt.% sodium silicate in terms of SiO24 - 65 wt.% and glass sodium liquid caustic - the rest. The technical result is an effective prevention of scale ASPV in the extraction of all types of oil - light, medium and heavy, at different temperatures, both high and low, improving environmental protection, efficient supply of inhibitor, the reduction tychi, in particular to solid compositions for preventing deposits asphaltoresinparaffin substances (ASPV) in the conditions of production of anhydrous or paleobotany oil (20%) of the wells both low and high reservoir pressure and at various temperatures.

There is currently no effective enough solid compositions to prevent ASPV, which would be suitable for processing the extracted anhydrous or paleobotany oil (20%) and consisting of cheap, widely produced by domestic industry, environmentally safe ingredients.

The majority of known inhibitors ASPV have a liquid consistency, and their dosage in the extracted oil is a special dosing devices.

Known composition for complex effects on the produced fluids, preventing deposition asphaltoresinparaffin substances (ASPV), inorganic salts and corrosion of the equipment with the following composition of ingredients, wt.%:

Nitrilotriacetate acid or hydroxyethylenediphosphonic acid - 1-4

Inhibitor ASPO hard - 29-36

Corrosion inhibitor solid - 12-18

VAT residue production permity composition has a firm consistency. In a production well, it is served in a perforated container. The method of preparation of such a known composition is quite simple and boils down to the usual mixing of these ingredients.

The main disadvantage of this known structure is that the substance is a carrier of inhibitors directed action of a known composition is CBM balance the production of primary amines C17-C20having a melting temperature of 60-80oS, i.e. when the temperature of the reservoir in the well over 80oWith its use is not effective, since the known composition melts, disintegrates, and active components based ingredients are quickly taken out with the production wells.

The closest to the technological nature of the claimed composition is a composition for preventing asphaltoresinparaffin deposits (ARPD) in the extraction of oil with the following composition of ingredients, wt.%:

Ethoxylated alkyl phenol with a degree of oksietilirovannye 9-12 - 33,0-45,5

Lignosulfonate technical - 3,9-15,7

The ammonium hydroxide - 1,1-8,3

Water - the Rest

(see RF Patent 1806160, CL 09 To 3/00, 1991).

This known composition is stagnant, pasty consistency of the Method of preparation of such a known composition is reduced to a thorough mixing of its ingredients.

The main disadvantage of this known structure is unstable mechanical-technological properties, namely, the low mechanical strength during storage, not more than 7 days. After this period, it dries out, becomes brittle and crumbles. Conditions of production are such that from the moment of preparation of the composition for preventing paraffin and delivery to the field, the load in the container and of the descent into the perforated interval of the production well is, as a rule, more than a month.

In addition, the known composition less effectively prevents the deposition of ASPV and does not provide a stable preventing deposits ASPV in terms of oil production from reservoirs with high temperature.

The technical problem to be solved by the proposed structure is to increase the degree of prevention education ASPV in wells with any type of oil, with different content ASPV and any temperature, while ensuring a stable mechanical and technological properties for a long time and the stewardship of composition.

The goal of the project is achieved by a composition containing a powder synthetic detergent (SMSE at the P2O5and at least 2 wt.% sodium silicate in terms of SiO2or powder technical cleanser (TMS), including not less than 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2ABOUT5and not less than 1.7 wt.% sodium silicate in terms of SIO, SIS2and alkaline additive is glass liquid caustic sodium, in the following ratio of ingredients, wt.%:

These CMC or TMS - 4-65

Glass liquid caustic sodium - Rest

From the patent and scientific literature we do not know the composition to prevent the deposition processes ASPV comprising the specified ingredients in the claimed proportions and allowing to solve the technical problem of the invention, which provides a basis to conclude that the composition has a criteria of "novelty" and "inventive step".

The achievement of the technical result was possible, apparently, due to the combined effects within the proposed composition of ingredients. Due to the limited dissolution of the composition in the produced oil is samodzielna in the prevention of deposits.

The criminal code is ekla sodium liquid caustic (SNIC) with the specified detergent, followed by molding in the form of cylinders, beads, granules or any other forms. Next, the composition is placed in the container, which is a system of perforated pipes of different diameters. Then the tubular container and the contained composition is lowered into the perforation zone of the production well or slightly higher under the pump.

Reservoir fluids passing through the holes on the sides and at the end of the container, wash the proposed composition. Due to the gradual dissolution is achieved by the constant, necessary, effective and sufficient concentration in the produced fluids.

To obtain the claimed composition in laboratory conditions were used the following materials:

- powder technical cleanser (TMS) (TU 2499-019-04643756 - 96);

powdered synthetic detergent (CMC) (TU 2381 - 007-04643756-94);

- glass liquid caustic sodium (TU 6-18-68-75).

Enablement of the claimed invention is confirmed by the following example.

Example. To obtain the claimed composition in the laboratory took 4.7g TMS and 5.3 g SNIK. The mixture was mixed and molded in the shape of round sticks. Received the claimed composition of solid consistency, dark-spasam received other formulations with different ratios of ingredients.

When laboratory testing were identified:

the mechanical - technological properties of the proposed structure;

the degree of dissolution of the claimed composition in the oil, produced water and their mixtures;

- the possibility of its samodzielny;

- protective effect of the proposed structure to prevent paraffin.

Tests also aim was to establish the boundary and the optimal values of the ingredients in the claimed composition.

Tests for changing the mechanical-technological properties over time was carried out as follows. Preparing the inventive composition was molded it into the shape of round sticks and left for observations at 180 days. At the same time was left for observation and the known sample of the prototype structure. As a result of these observations established that the known composition was destroyed after 7 days (2-day storage cracks appeared on the 5th it broke into three pieces, and on the 7th day he broke up into smaller pieces). The claimed composition was initially kept its shape during the whole observation period, i.e. within 180 days.

Testing the solubility of the composition was performed in the traditional way of determining the degree of dissolution is different and, taken in a volume of 1 l, closed tube and installed in the device for shaking flasks. After 1 h the contents of the flask was filtered under vacuum through the filter of "blue ribbon". Remaining on the filter, the amount of the claimed composition was weighed. The quantity of dissolved within 1 hour of the claimed composition in various fluids are shown in table 1.

The data in table 1 show that the inventive composition is soluble in oil, water and their mixtures. Moreover, the data in table 1, indicate that the dissolution rate of the proposed structure in the water more than oil.

Further, in laboratory tests determined the protective effect of the proposed structure and the ultimate and optimal ratios of ingredients in it.

The choice of limit values ingredient in the inventive composition due to reaching the maximum protective effect.

The effectiveness of the claimed composition was determined as follows. The claimed composition is cut into pieces 1-3 cm3, put them in glass cylinders with a diameter of 60 mm and a length of 300 mm with two valves: the top and bottom. Further, through the funnel, the lower the crane and pieces of composition in the cylinder moved Obvodny the circulation of fluids through a submerged cylinder (hole) of the claimed composition.

The claimed composition, partially dissolving in the oil and produced water, exerts its inhibiting function across the path of motion. Through the cylinder with the claimed composition was passed 1000 ml of oil. Thus was simulated by feeding the claimed composition in the produced water-free oil. Skip the oil was in constant motion. Periodically, every hour, samples were taken of flowing from the cylinder oil in the volume of 100 ml in the same manner were prepared the model produced fluids with different degrees of flooding.

Determining the ability of the proposed structure to prevent the deposition ASPV was conducted according to the generally accepted "Methods of evaluating the effectiveness of inhibitors paraffin deposits of complex and multiphase washing steps on the oil film, dispersing and washing paraffin deposits formation water", NGO "Soyusneftepromhim". - , Kazan, 1987

According to this methodology the evaluation of the effectiveness of the claimed and known compounds to prevent paraffin deposition was performed on the following parameters:

1. To launder the oil film of this composition.

2. Largest dispersion of sediment in the environment of the proposed structure.

3. The characteristic properties ASPV in these services is blitz 2.

The data in table 2 show that the effectiveness of the proposed structure above the known effectiveness of the prototype.

When we study the efficiency of the known and proposed structures on heavy oils, Pavlovsky field (density 0,917 g/cm3), known composition washes film of oil at 60 with only 70% of the surface, and declared for the same period washes film of oil almost entirely (90% of the surface). The amount of dispersion particles ASPV in the presence of known composition reaches 0.1 to 5 mm, and in the presence of the claimed composition are all available ASPV have a particle size of not more than 3 mm, which, of course, helps them better hold in the volume of produced fluids, and not placed on the surface of oilfield equipment. The intensity build-up in the presence of known composition reaches 40%, and in the presence of the claimed up to 10%, i.e. 4 times less. The amount of glossing the surface in the presence of known composition reaches 20%, and in the presence of the claimed - 5-10%. The same, approximately, can be observed when testing the known and the claimed compositions on average (North-Kama field, Vereyskaya reservoir, the density 0,842 g/cm3) and lung (Constantine mestinya the effectiveness of the proposed structure at high temperatures after the study of these properties at 20oWith the same research was carried out at 98oC. are Shown in table 2 suggests that at high temperatures the efficiency of the proposed structure is higher than at 20oS. Known as the prototype structure under these conditions is destroyed and quickly made the flow of oil.

In the study of the known and the claimed compositions of the oil and water were selected after passing through the pieces of the investigated compounds. To define took the oil, produced water and asphaltoresinparaffin deposits Constantine, Pavlovsk and North-Kama fields. More detailed characteristics used in the studies of oil, produced water and paraffin are shown in tables 3-5.

The proposed composition for treatment of extracted oil to prevent ASPV compared with the known prototype structure has the following advantages:

- provides a more effective prevention of scale ASPV in the extraction of all types of oil: light (density 0,804-0,840 g/cm3), medium (density 0,841-0,880 g/cm3), heavy (density 0,881-0,925 g/cm3) with different content of asphaltenes, resins, waxes, and also at different temperatures: CSCI safe ingredients produced at the present time on the territory of Russia. All included in the inventive composition, the ingredients are the fourth class of hazard, i.e., all of them are safe and widely used in everyday life. The prototype also contains ingredients that have the following hazard classes: ethoxylated alkyl phenol with a degree of oksietilirovannye 9-12 - III hazard class, lignosulfonate technical - IV class of danger, the ammonium hydroxide - II hazard class.

Thus, at present, only the inventive composition can also more effectively prevent the formation ASPV during the production of anhydrous and paleobotany oil in oil wells with various temperatures. While the inventive composition contains no hazardous ingredients.

The claimed composition is capable of partially dissolving in the oil and a few more in the water, i.e., when the flow into the well it works equally efficiently, protecting oil field equipment from sediments ASPV in the conditions of constantly changing water production wells.

These technical advantages of the proposed structure allows you to:

to provide without additional processing stable, timely, effective supply inhibitor sediments is from collectors with any degree of permeability with any temperature;

to prevent the deposition of ASPV from the very beginning of the process chain for the production, gathering, transportation and processing of oil;

- to ensure effective protection of deep and surface oilfield equipment from sediments ASPV across the path of movement of oil-water flow.

The economic effect of the application of the composition for treatment of oil to prevent deposits ASPV will develop due to:

- reduce labor costs associated with debt brigades and underground repair of wells for operations to remove ASPV;

- increase the current recovery, because it increases the turnaround time of the well;

exceptions to the additional treatment of wells solvents and heat treatment oil and water.

Composition for preventing deposition asphaltoresinparaffin substances in oil, containing a mixture of surfactants and alkaline additive, characterized in that a mixture of surfactants, the composition contains powdered synthetic detergent (SMS), including not less than 12 wt. % of surface-active substances, at least 10.5 wt. % phosphor powder technical cleanser (TMS), including not less than 4.5 wt. % of surface-active substances, at least 11 wt. % phosphoric acid salts in terms of P2ABOUT5and not less than 1.7 wt. % of sodium silicate in terms of SiO2and as the alkaline additive is glass liquid caustic sodium in the following ratio of ingredients, wt. %:

These powdered detergents - 4 - 65

Glass liquid caustic sodium - Rest

 

Same patents:

The invention relates to the field of oil production, in particular, compositions for removal asphaltoresinparaffin deposits (ARPD), and can be used to remove paraffin from the bottom-hole formation zone, flow lines, gathering collectors and oil field equipment oil-producing and oil-refining enterprises

The invention relates to the mining industry, in particular to methods for processing bottom-hole zone of the reservoir (PPP) composed of low-permeability clayey terrigenous rocks, in deep wells producing gas

The invention relates to the oil industry, and in particular to methods of inhibiting the deposition of wax in the extraction and transport of oil by means of chemical reagents

The invention relates to the field of exploitation of oil and gas wells, complicated asphalt-resinous and palatinolinotype deposits

The invention relates to the field of oil production and refining

The invention relates to the oil and gas industry, in particular compositions for the production and transportation of oil, as well as compositions for combating asphaltenesresinous deposits in oil field equipment, in the bottom-hole zone of oil wells and pipelines

The invention relates to the field of the oil industry and can be used in the extraction of oils with a high content of waxes, resins and asphaltenes

The invention relates to the oil industry and can be used in the extraction of crude oil containing hydrogen sulphide

The invention relates to the field of dissolution of sediments in the oil industry and can be used in the systems of production, transportation and storage of oil for removal of asphalt-resinous deposits
The invention relates to the field of oil and gas production, and is intended for cleaning wells (pipe columns) from asphalt-resinous and paraffin-hydrate deposits (ASPHO) generated during operation of wells

The invention relates to the field of sealing compositions for repair of defects operated and constructed a network of pipelines and heating equipment

The invention relates to the field of oil production, in particular, compositions for removal asphaltoresinparaffin deposits (ARPD), and can be used to remove paraffin from the bottom-hole formation zone, flow lines, gathering collectors and oil field equipment oil-producing and oil-refining enterprises

The invention relates to heat-insulating, fire-resistant sealing materials

The invention relates to the field of polymer sealant compositions used for sealing seams on the edges of surfaces, especially glass-glass
The invention relates to magnetic pins and can be used to separate mixtures, adsorption to the interface air - water, wastewater, magnetic separation, magnetic protection against radiation

Sealant // 2181744
The invention relates to the field of polymer sealant compositions used for sealing joints on the limits of surface metal-metal, metal-glass, glass-glass, glass-concrete, etc

The invention relates to a method of sealing an emergency containers with hazardous materials
The invention relates to road maintenance production, in particular to ways of dealing with winter slipperiness used to ensure the safe movement of vehicles on the roads and for icing

FIELD: soft abrasive materials based on mixed aluminum and iron oxides.

SUBSTANCE: method includes blending of raw components and subsequent heat treatment. Solutions of aluminum and iron sulfate with ammonia bicarbonate admixture heated to 40-600C are used as raw materials to produce slurry of aluminum and iron bicarbonates. Precipitate is separated by filtration, washed and dried. Heat treatment is carried out at 1150-12000C to provide solid solution expressed by general formula Al2-xFexO3, wherein x = 0.30-0.37. Mass part of iron oxide in finished product is 20-25 mass %. Abrasive materials of present invention are useful for finished polishing of metal parts, have polishing ability of 0.37-0.40 mg/min.cm2, provide roughness RZ = 0.07-0.08 mum after polishing and 85-90 %-yield of high-precision accepted metal parts.

EFFECT: environmentally friendly abrasive materials of improved quality.

1 cl, 3 ex, 1 dwg

Up!