The method of preparation and submission of a water-soluble reagent in the well

 

(57) Abstract:

The invention relates to the oil industry and can be used in the process of oil production for supply of reagents in the well. The method includes loading the reagent in the container and dosing it in the water environment. The density of the oil and aqueous phases extracted from the well, determine in advance. Before loading into the container of water-soluble reagent is mixed with fresh water to achieve the density corresponding to the value between the density of the oil phase and the density of the aqueous phase. The reagent serves dosage through the well annulus to the surface layer of water in the well. The invention improves the efficiency of the reagent by ensuring optimal contact of the reagent with the production wells. 1 Il.

The invention relates to the oil industry and can be used in the process of oil production for supply of reagents in the well.

Efficient oil extraction is achieved by using various reagents for demulsification, reduce corrosion of equipment, prevention of hydrates, paraffin deposition and so forth.

Application reagent The technology of preparation and mixing of the reagent with the products of well known (Thrones Century P. Commercial oil preparation.- M.: Nedra, 1977, S. 31-38). The reagent is prepared by fluidity dilution solvents or heated, for mixing the reagent with the environment typically use energy flow that is injected into the turbulent flow. However, the introduction of the reagent in turbulent flow, or even additional mixing does not provide optimal conditions for the interaction of the reagent with the production wells at a weak mixing of the reagent is not completely in contact with the products well, and with strong mixing occurs predispersion production wells and difficult process of separating oil and water.

The known method of preparation and submission of the reagent in the well implemented in the device according to the patent of Russian Federation N 2132931 (MCI 6 E 21 B 37/06, publ. 10.07.99, bull. N 19). According to the method, the reagent is loaded into the container, and then served dosage in the flow line of the well. The disadvantage of this method of injection is insufficient mixing of the reagent with the production wells.

The objective of the proposed technical solution is to increase the efficiency of the reagent by ensuring optimal contact of the reagent with the production wells.

The task of resets the water-soluble reagent in the container and metered delivery in oil-water environment, according to the invention, before loading a water-soluble reagent is mixed with fresh water before reaching its density corresponding to the value between the density of the oil phase and the density of the aqueous phase.

The specified solution allows you to create conditions for easy delivery of the reagent to the surface of the aqueous phase of the emulsion in the well, it is easy to mix it with water in the surface layer, which is extracted and pumped by pump.

Regulation of the density of the reagent before filing into the well so that its density was greater than the density of the oil phase, and less than the density of the aqueous phase of the emulsion, delivers reagent to the surface of the aqueous phase, since the reagent is drowning in the oil layer, comes to the aqueous phase and spreads on the surface layer of water. The mixing of the reagent with the water flowing on the surface layer of water ensures optimum mixing of the reagent with water, which is taken directly by the pump, thus making efficient use of the reagent for treatment products well.

The proposed method can be used device for dosing a reagent into the flow line of the well by the patent RF N 21 is placed on the figure.

The device includes a production casing of the well 1, the pump-compressor pipe 2, flow line 3, the container 4 for the reagent, the tube 5, the valve 6, the receiver 7, the control valves 8, the level indicator 9, the nozzles 10, 11 gauge.

The method of preparation and submission of a water-soluble reagent in the well is as follows.

Well, where it is necessary to submit the reagent, equip featured device.

Determine the density of oil and water extracted from the well. Water-soluble reagent typically has a density greater than the density of formation water. Therefore, to reduce the density of the reagent dilute it with fresh water so that its density was less than the density of the formation water. The prepared reagent solution is poured into the container 4 for the reagent. The level of reagent in the container is checked by opening the control valves 8 or level indicator 9. To start the dosage of the reagent in the well in operation open the valve on the tube 5 and install the necessary dosage with a valve 6 on the tube 7.

Example. For introduction into the well in order to reduce corrosion of equipment took a water-soluble reagent corrosion inhibitor IKB-AF with PLO is here produced water - 1100 kg/m3. To obtain the reagent solution with a density corresponding to the value between the densities of oil and water, mixing the reagent with fresh water in a ratio of 1:4. Got the reagent solution density of 1090 kg/m3. The reagent solution was loaded into a container and made the dosing of the reagent in the well annulus at the mouth.

The present invention allows to create optimal conditions for mixing water-soluble reagent with work environment and thereby improve the efficiency of its use.

The method of preparation and submission of a water-soluble reagent in the well, including the loading of the reagent in the container and dosing it in the water environment, wherein the pre-determined density of the oil and aqueous phases extracted from the wells before loading into the container of water-soluble reagent is mixed with fresh water to achieve the density corresponding to the value between the density of the oil phase and the density of the aqueous phase, and serves dosage through the well annulus to the surface layer of water in the well.

 

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