SU883356A1 - Method of working a hydrocarbon deposit - Google Patents

Description

(54) METHOD FOR DEVELOPING HYDROCARBON MONEY

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This invention relates to an oil industry. existing industries, in particular, to methods for the development of highly viscous hydrocarbons, such as bitumen.

The thermal method of producing high viscosity oil is known by creating in the oil-saturated formation near injection wells and moving from injection wells to production wells of the combustion front. This method allows to drastically reduce the viscosity of the oil and increase its mobility. It is used in the production of oil having a viscosity of ten centimeters centipoise and is ineffective in the production of oil having large values of viscosity and oil from heterogeneous formations, since a small amount of heat released from the combustion of mineral resources is not enough to create and uniform moving a steady burning front.

There is also known a method for developing a hydrocarbon reservoir by creating a source of combustion in the reservoir and exposing the reservoir to an electroacoustic field, with the electromagnetic field acting upon the creation of the source of combustion 21.

However, the method is not effective enough in the development of highly viscous hydrocarbons, for example bitumens,

10 due to incomplete heat coverage of the reservoir.

The purpose of the invention is to increase the efficiency of the development of high viscosity hydrocarbons, such as bitumen, for

15 due to an increase in warmth coverage of the formation.

This goal is achieved by the fact that, according to the method of developing a hydrocarbon reservoir, which consists in creating a burning site in the reservoir and an electromagnetic field impact on the reservoir, the electromagnetic effect on the reservoir is started before the creation of the fire source and carried out continuously before the ignition of hydrocarbons.

The method is carried out as follows.

In a hydrocarbon reservoir, for example, a bituminous reservoir, a high-frequency electromagnetic field is created by means of an electromagnetic radiator located in an injection well that is a part of a pump-compressor tube projecting below the casing. In this case, the tubing is insulated from the casing with dielectric washers and connected to a high-frequency installation.

When a formation is exposed to a high-frequency electromagnetic iio.TseM, it heats up due to the dielectric loss of bitumen, produced water and the Rock containing these fluids. . As a result, there is a decrease in viscosity of bitumen and its acquisition of fluidity.

Due to the attenuation of the electromagnetic effect due to dielectric losses in the formation, the latter is heated unevenly, and at the points that are located in the emitter, is stronger.

The electromagnetic effect is produced continuously until the temperature reaches the temperature at which the bitumen ignites. At the same time, from the surface, air is injected into the formation through the injection well and a steady burning center is created in the formation.

After that, the electromagnetic effect on the formation is periodically (in order to save electrical energy, it is repeated to maintain the temperature of the bitumen fluidity.

The implementation of bitumen fluidity and its maintenance ensures a reduction in resistance forces when bitumen is displaced from the reservoir to the surface through production wells, and as a result, the reservoir’s power coverage and stretch by the source of combustion increases, the stability of the source of combustion and the uniformity of movement of the combustion front are achieved. the floor on the bituminous reservoir causes the appearance of ponderomotive forces (from the electromagnetic field) and, as a result, additional degrees At the same time, the surface tension at the interface of bitumen-rock and bitumen-water also occurs. All this contributes to the displacement of flowing bitumen ich. reservoir. ..

The temperature of the reservoir above the temperature of the flow of bitumen is determined, for example, by calculation, and is monitored during the execution of the method according to the temperature of the outflowing liquid from the production wells.

The change in the intensity of the electromagnetic field in the reservoir regulates the amount of released energy, and therefore provides an intensification of the combustion process.

In addition, the proposed method can be carried out using electrodes that have been lowered into an injection and production well.

The use of the proposed method of developing a hydrocarbon reservoir, compared to the existing ones, allows for the extraction of minerals with viscosities of nine thousand and more centipoise, to increase the coefficient of reservoir coverage by the combustion lever, to achieve stability, the source of combustion, and uniform displacement of the combustion front, exclude the cost of using special equipment to initiate combustion, to increase the efficiency of the method in the extraction of slow-moving minerals, to simplify its technology.

Claims (2)

Invention Formula A way to develop a hydrocarbon reservoir by creating a source of combustion in the reservoir and acting on the reservoir with an electromagnetic field, in order to increase the efficiency of developing highly viscous hydrocarbons, such as bitumen: prior to the creation of the source of combustion and carried out continuously until ignition of hydrocarbons. 5 Sources of information taken into account in the examination I. Amelin I.D. and others. Exploitation and technology development of non-gas 8833566 and gas fields. M., Nedra, 1978, p. 147. 2. USSR author's certificate. No. 325353, cl. E 21 B 43/24, 1972 (prototype).