The method of processing bottom-hole zone of the well and the device for its implementation

 

The invention relates to the oil industry and can be used for stimulation of oil by melting and removing from the bottom zone of asphalt-resin and paraffin deposits. The method is carried out using a device containing a pressurized container, the upper part of which is closed by the native valve. The container is connected to the intake with side slits. The intake upper part is connected with the depression chamber containing a controlled valve. Deliver the treated interval of the well logging cable thermogenerator placed in an airtight container. Inside the container are heat-generating substance in the form of calcium carbide and a container of water containing node depressurization. With ground control on conductor logging cable, electric wire is the pulse at the node depressurization of the vessel with water. Water interacts with the calcium carbide, releasing heat and hydrogen. The pressure inside the container and unmanaged valve“tube” opens. Through the slits of the heated intake air mixture enters into the borehole. Processing of bottom-hole formation zone of hot products is second pause. Create a depressive effect on the heated treated area. From ground control panel supplied current pulse to the controlled valve, lasermedizin depression chamber. The use of the invention improves the efficiency of intensifying oil production by fusion and removal of the bottom-hole formation zone of asphalt-resin and paraffin deposits, to eliminate the effect of hydrostatic pressure on the duration of heat treatment, to reduce the processing cost. 2 S. p. f-crystals, 1 Il.

The invention relates to the oil industry and can be used for stimulation of oil.

A method of processing well bottom-hole zone (RF Patent No. 2142051, MKI 7 E 21 In 43/25, 27.11.99), which consists in the descent on the column tubing perforated container with a solid sealed aluminium capsules filled with alkaline or alkaline-earth element, and providing interaction with the hydrochloric acid in the treated interval. Released by the reaction heat and the reaction products increase the effectiveness of acid treatment of bottom-hole formation zone.

The disadvantage of this method is the straps on the layer processing, the increased cost of processing and the use of special equipment.

A method of processing bottom-hole zone of the well and the device for its implementation (application for invention of the Russian Federation 96106639/03, 20.01.99, MKI 6 E 21 In 43/25, 43/18), which consists in burning pyrotechnic charge at the well bottom, and then creating a depression. In the method before carrying out operations of the borehole filled with fluid with high density and create the pressure of the liquid column corresponding to Plast pressure, before creating a depression in the interval of the reservoir, starting from the bottom, burn slow burning pyrotechnic charge, emit gases with high temperature during the time corresponding to the time of heating of the bottom zone to the melting temperature clogging elements, conduct technology shutter speed for substitution in the productive interval of the formation of the gaseous products of combustion of the pyrotechnic charge of the downhole fluid, and after the depression is removed from the zone of the productive interval of the formation portion of the well fluid received in the depression of the bottom zone clogging elements.

However, in this way increasing hydrostatic pressure a reservoir, increasing the cost of treatment. The use of pyrotechnic charges for treatment of wells is limited to the Deposit geological features, such as high gas factor.

There is also known a method and apparatus latinolingo the jet impact on the oil and gas formation (RF Patent №2124121, 27.12.98, MKI 6 E 21 In 43/25). The device consists of a sealed housing with channels, closed tubes with spacers, means of ignition and detonation of the charges with wires, fastening elements geophysical cable. Sealed enclosure with charges of combustible or explosive substances filled with hydrocarbon fuel.

The disadvantage of this device is to use for seal failure explosive substances, as well as the increased cost of handling well.

The closest adopted for the prototype is an apparatus for stimulation of the formation (RF Patent № 2133336, 20.07.99, MKI 6 E 21 In 43/263), which implements a method of processing wellbore zones, filled with fluid, including delivery to the treated interval of the well logging cable thermogenerator, its initiation, processing bottom-hole formation zone of hot reaction products, technological pause for the area. The apparatus contains implosion chamber with a controlled valve and attached to the lower end of thermogenerators controlled from the surface. To the lower end of thermogenerator attached to the combustion chamber, the body of which is made Slovenia slit. In the combustion chamber is a divider for directing exhaust gases, and the implosion chamber placed anchor.

Lack of equipment is the influence of hydrostatic pressure, which in turn decreases the duration of heat treatment of the productive formation.

The proposed invention solves the problem of increasing the efficiency of enhanced oil recovery by melting and removal of the bottom-hole formation zone of wax and paraffin deposits, eliminate the influence of hydrostatic pressure on the duration of heat treatment, reduce the cost of processing.

To obtain such a technical result in the proposed method of treatment of bottom-hole zone of the well, including delivery to the treated interval of the well logging cable thermogenerator with the fuel substance, its initiation, processing bottom-hole formation zone hot products repressione impact on a heated processing zone, in wells filled with fluid oil-based as fuel substances thermogenerator use calcium carbide to be delivered into the processing interval of the well in an airtight container, inside of which is placed a container of water, with the initiation of the fuel substance is carried out after the achievements of the processed interval to ensure contact of the calcium carbide with water by depressurization of the vessel with ground control.

To achieve the mentioned technical result is a device for processing bottom-hole zone of the well, containing ground remote control, wireline, geophysical head, depression chamber with a controlled valve, thermogenerator placed in an airtight container, connected to the intake with side slits, in which the upper portion of the container is closed by the native valve“tube”, and in the container together with the calcium carbide is placed a container of water containing node depressurization, controlled from the surface of the ground by remote control.

The drawing shows the basic elements of the device for processing bottom-hole zone of the well.

The proposed method is carried out in slimy interval of the well logging cable thermogenerator with the fuel substance. After that make the initiation of thermogenerator, processing bottom-hole formation zone of hot reaction products, maintain technological pause after the reaction for a fuller utilization of the generated heat, impact of depression on the heated treated area. As the fuel substance use calcium carbide to be delivered into the processing interval of the well in an airtight container, inside of which is placed a container of water, with the initiation of the fuel substance is carried out after the achievements of the processed interval to ensure contact of the calcium carbide with water by depressurization of the vessel with ground control.

Water interacts with the calcium carbide to produce heat and acetylene. Flows the following reaction:

CAC2+2H2O = CA(Oh)2+C2H2+3.04 from kcal

At high pressures and temperatures acetylene decomposes into carbon and hydrogen with the evolution of considerable heat, equal of 53.7 kcal.

The resulting reaction will go at the following final equation:

CAC2+2H2O = CA(Oh)2+2C +N2+84,1 kcal

When converted to kilogram carbide ka is ri interaction kg of sodium with water is 6,12 MJ). The duration of action of thermogenerator based on calcium carbide is determined by the size of his pieces (granulation).

The proposed device for processing bottom-hole zone of the well (Fig. 1) consists of a container 1 with thermogenerators, calcium carbide 2, the upper part of which is closed by the native valve“tube” 3. In the cavity of the container 1 together with the calcium carbide 2 placed the water container 4 containing the node depressurization 5, which is connected with the electric wire 6, residential wireline 7 to managed with the surface of the ground controller 8.

The container 1 is connected to the intake 9 with side slits, which upper part is connected with depression chamber 10 containing the controlled valve 11 connected to the electric wire 12. Depression of the camera 10 is connected with geophysical head 13, with the logging cable 7 and ground-based remote control 8.

The device operates as follows.

With the ground control panel 8 by conductor logging cable 7, the electric wire 6 is fed a current pulse on the node depressurization 5 water container 4. Water interacts with the calcium carbide 2, releasing heat and hydrogen. Occurred when the pressure inside the container in some of the cut slits standpipe 9 hits in the downhole environment. After completion of the reaction from the ground control panel 8 by conductor logging cable 7, the electric wire 12 is fed a current pulse to the controlled valve 11, lasermedizin depression chamber 10. Molten wax and paraffin deposits (ARPD) together with the downhole fluid rushing through the intake slots 9 in the depression chamber 10 to facilitate cleaning of the bottom-hole zone of the well.

The downhole portion of the device rises to the surface. The amount of water in the water container 4 should be equal to 0.56 kg / kg of calcium carbide 2 (ratio 1:2).

Using the proposed method and device for processing bottom-hole zone of the well will increase the efficiency of enhanced oil recovery by melting and removal of the bottom-hole formation zone of wax and paraffin deposits, to eliminate the effect of hydrostatic pressure on the duration of heat treatment, to reduce the processing cost.

Claims

1. The method of processing bottom-hole zone of the well, including delivery to the treated interval of the well logging cable thermogenerator with fuel vashisth after the reaction for a fuller utilization of the generated heat, depression effects on the heated processing zone, characterized in that the wells are filled with fluid oil-based, as fuel substances thermogenerator use calcium carbide to be delivered into the processing interval of the well in an airtight container, inside of which is placed a container of water, with the initiation of the fuel substance is carried out after the achievements of the processed interval to ensure contact of the calcium carbide with water by depressurization of the vessel with ground control.

2. A device for processing bottom-hole zone of the well, containing ground remote control, wireline, geophysical head, depression chamber with a controlled valve, thermogenerator placed in an airtight container, which is connected with the intake having lateral slots, characterized in that the upper portion of the container is closed by the native valve stopper and the container together with the calcium carbide is placed a container of water containing node depressurization, controlled from the surface of the ground by remote control.

 

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