The way to prevent the formation of wax and paraffin deposits in the system of production and collection of oil

 

(57) Abstract:

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 method includes the preparation and submission of chemical into the system. Production wells are mixed with a chemical reagent. Production wells with a reagent and/or a part of the production wells with chemical processes in an alternating magnetic field of low frequency and served in the annular space of wells to flush tubing and flow lines of wells in the normal mode of operation and/or into a collecting reservoir. Optionally washing the resulting deposits in the borehole supply of processed products in the well is produced when the pump stops, this well. The invention allows to increase the contact of the reagent with particles of asphaltenes, resins and waxes. 1 Il.

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.

Extraction of oils with a high content of waxes, resins and asphaltenes is associated with complications due to sedimentation of e is e ways of dealing with deposits of asphaltenes, resins and waxes in oil production (Shurov Century. And. Technology and engineering of oil. Textbook for high schools.- M.: Nedra, 1983, S. 405). The most widespread methods: periodic heat treatment of wells; pumping annulus different solvents (kerosene, diesel oil, volatile gasoline); pipe cleaning from deposits scrapers; warning sediments ostekleneniem the inner surface of the pipe, and so on, All these methods are time-consuming and costly.

Closest to the present invention is a method for preventing and removing estatemaster and paraffin deposits.with. N 1488439, CL E 21 B 37/06, publ. 23.06.89.), including periodic supply of reagent-inhibitor in the well annulus, in which prior to the filing of the reagent additionally served concentrated aqueous ammonia solution. In an environment with an aqueous solution of ammonia improve dispersing properties of the reagent and increases the efficiency of its use. However, in such conditions does not ensure efficient mixing of the reagent with the environment, a sufficient contact with the globules of fat, which affects not fully remove wax and paraffin deposits.

Thus, the grown up by the Oia of the effectiveness of the reagent.

The technical result is an increase of contact of the reagent with particles of asphaltenes, resins and waxes.

This technical result is achieved by the fact that in the known method to prevent the formation of wax and paraffin deposits in the system of production and collection of oil, including the preparation and filing of chemical into the system, according to the invention, production wells are mixed with a chemical reagent, and then production wells with a reagent and/or a part of the production wells with chemical processes in an alternating magnetic field of low frequency and served in the annular space of wells to flush tubing and flow lines of wells in the normal mode of operation and/or into a collecting reservoir, and optionally washing the resulting deposits in the borehole supply of processed products in the well is produced when the pump stops this well.

Processing production wells with a reagent or part of the product with the reagent in an alternating magnetic field of low frequency increases the efficiency of the reagent, as achieved good contact of the reagent with the production wells under the influence of an alternating magnetic field of low frequency have what is the formation of scale on the walls of the equipment and pipes.

The supply of processed products in the annular space of wells provides protection from deposits deep pump and tubing in the well, and, if necessary, washing the resulting deposits. Under the proposed method one reagent supply and one device for processing in a magnetic field provides protection from deposits precast collector and all wells of the same Bush that dramatically reduces the cost of the technological process for the protection of equipment from deposits.

The proposed method can be implemented with the system shown in the drawing.

The installation includes the following units and equipment: wells 1, United in the hive, the process unit 2 group measuring unit, the device 3 for dosing of the reagent, the device 4 for processing products in an alternating magnetic field of low frequency, the pump 5, a flow line of wells 6, a collecting reservoir 7, the bypass line 8, pipe 9, the collector 10 for injection products in the annular space of wells, the check valve 11, the valve 12-22 on pipelines. The drawing shows only three wells and one well cluster can be more than ten. All wells Bush are connected similar to the Jin 1 by flow lines 6 wells enters the process unit 2 group measuring unit, next, the production wells in precast collector 7 is directed to the point of oil, water and gas. Into a collecting reservoir 7 in accordance with the technological regulations served the necessary chemical reagent (solvent, inhibitor, and so on) with the help of the device 3 for dosing. At the bypass line 8 is set to the device 4 for processing products in an alternating magnetic field of low frequency. The device 4 can be connected or disconnected from the flow of produced fluids through valves 13 and 14. Change the position of the valve 12 through the device 4 can be skipped part or the entire flow of production wells. Part of the flow of production wells with reagent-treated in an alternating magnetic field of low frequency, the pipe 9 is directed into the well, where it is necessary to blur the resulting deposits inside tubing or prevent the formation of asphaltenes, resins and waxes. The pump 5 to the pipe 9 allows the circulation of part of the production wells where it is necessary to soften the fat, feed the processed part of the products is available in a separate well or simultaneously in several wells using the collector 10 and by opening or closing valves 17, 18, 19 the erosion of the formed sediments in borehole supply of processed products in this well is when the pump stops, this well, and in the preventive mode, i.e. when the processed part of the products served to prevent sediments, the operation of the pump well is not terminated, the processed part of the products is served in the well during normal mode of its operation. The presence of non-return valves 11 and valves 20, 21, 22 ensures the normal operation of wells at the bus stop one of the wells. Thus, the described setup allows you to implement a method of preventing the formation of deposits of asphaltenes, resins and paraffins in the system of production and collection of oil in a variety of options in an effective manner.

The implementation of the method allows to process in a continuous mode, any well Bush separately or simultaneously several wells. This well can operate in the specified mode or can be stopped. The number of treated liquid can be easily modified by changing the positions of the valves 12, 13, 14, 15. If necessary, the treated liquid can be fully directed only to the collector 7, without submission to the wells, or all of the treated fluid can be directed into the wells, if required intensive flushing.

Processing production wells or parts of products simultaneously reagent or processing only in a magnetic field, as in the above-mentioned processing is repeatedly increases the interaction of the reagent with particles of wax and paraffin deposits, contributing to a more complete destruction of the latter.

The way to prevent the formation of wax and paraffin deposits in the system of production and collection of oil, including the preparation and filing of chemical into the system, wherein the production wells are mixed with a chemical reagent, and then production wells with a reagent and/or a part of the production wells with chemical processes in an alternating magnetic field of low frequency and served in the annular space of wells to flush tubing and flow lines of wells in the normal mode of operation and/or into a collecting reservoir, and optionally washing the resulting deposits in the borehole supply of processed products in the well is produced when the pump stops, this well.

 

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