The method of separation of production wells and device for its implementation

 

The invention relates to the oil industry and can find application, for example, in the separation technology of production wells, which is lifted from the well in the form of a liquid hydrocarbon emulsions and, in particular, in the form of gazoochistnoe emulsion. Provides a simplified method and device with the ability to regulate the degree of gas separation. The inventive method includes the ascent of production from wells in the form of a liquid hydrocarbon emulsion and heated. Then carry out hydrodynamic processing of products in the turbulent regime with the destruction of natural stabilizers hydrocarbon emulsion. Then perform additional hydrodynamic processing of products, ensuring hydrodynamic flow regime liquid phase, characterized by a Reynolds number of not more than 10000. That you are carrying out separation of the main number associated water and gas from the liquid hydrocarbon phase. The degree of gas separation from the liquid hydrocarbon phase to regulate the pressure at which carry out additional hydrodynamic processing of products. The device includes a pipeline to supply products in the form gazozhidkostnoi emulsion. This site has a narrowed part of the pipeline, the flow Converter products in the form of a cylinder and the extended part of the pipeline. The device is equipped with an additional Converter product flow in the form of a horizontally placed cylinder. It is made with the possibility of a hydrodynamic flow regime liquid phase, characterized by a Reynolds number of not more than 10,000 and placed between node destruction of natural stabilizers hydrocarbon emulsion and site drainage phases of production. There is also a control unit gas separation in the form of a cylinder. He posted on additional Converter product flow throughout its length, communicated with him in its length and has a fitting at the outlet. 2 C. and 7 C.p. f-crystals, 1 Il.

The invention relates to the oil industry and can find application, for example, in the separation technology of production wells, which is lifted from the well in the form of a liquid hydrocarbon emulsions and, in particular, in the form of gazoochistnoe emulsion.

General issues of separation of oil cut (demulsification) studied in detail and are widely used in practice (1).

The main task in this separatation sucks krupnevshim drops.

Usually produced well products, pre-processed or, more usually, unprocessed (raw sephirot on thermochemical plants at elevated temperatures with the addition of demulsifiers.

The applied methods and devices for separation have significant disadvantages, which are that the methods of time-consuming and not always effective, and devices of metal, are expensive and require a significant expenditure of energy. The reason is that the known solution for the separation of production wells provide high temperature. In addition, the known device requires a significant expenditure of demulsifier.

The closest analogue of the invention in the part of the method is a method of separation of production wells, including her rise from the well in the form of a liquid hydrocarbon emulsion, heating products, hydrodynamic processing of products in the turbulent regime with the destruction of natural stabilizers hydrocarbon emulsion and removal of the products of separation (2).

The closest analogue of the invention in the part of the device is a device for the separation of production wells, including pipeline DL natural stabilizers liquid hydrocarbon emulsion, having a narrowed part of the pipeline, the flow Converter products in the form of a cylinder and the extended part of the pipeline, site drainage phases of production and pipelines connecting the node device (2).

The disadvantage of the above known solutions in terms of method and devices is their low efficiency, high costs of time and a large metal necessary equipment for the separation of production wells, due to the need of application of a number of complex separators with shoulder separation.

The technical result of the invention is to simplify the method and device with the ability to regulate the degree of gas separation.

Required technical result in part of the method is achieved in that in the method of separation of production wells, including the rise of production from wells in the form of a liquid hydrocarbon emulsion, heating products, hydrodynamic processing of products in the turbulent regime with the destruction of natural stabilizers hydrocarbon emulsion and removal of the products of the separation, according to the invention after hydrodynamic treatment of products in the turbulent regime implementing the additional hydrodynamic of eynolds not more than 10,000, and with the separation of the main number associated water and gas from the liquid hydrocarbon phase, and the degree of gas separation from the liquid hydrocarbon phase to regulate the pressure at which carry out additional hydrodynamic processing of products.

Additionally: separation of gas from liquid hydrocarbon phase is performed by the possibility of providing the linear velocity of the gas stream does not exceed 10 cm/s; the degree of gas separation from the liquid hydrocarbon phase is regulated depending on the degree of mobility of production wells in the highways; the degree of gas separation from the liquid hydrocarbon phase to regulate the pressure of gas in the host gas outlet.

Required technical result in part of the device is achieved by a device for the separation of production wells, including the pipeline for the supply of products in the form of a liquid hydrocarbon emulsion, the site of heated products, the site of the destruction of natural stabilizers hydrocarbon emulsion having a narrowed part of the pipeline, the flow Converter products in the form of a cylinder and the extended part of the pipeline, site drainage phases of production and pipelines connecting the node device according to the invention is ustroystvo.ranee with the possibility of a hydrodynamic flow regime liquid phase, characterized by a Reynolds number of not more than 10,000 and placed between node destruction of natural stabilizers hydrocarbon emulsion and site drainage phases of production, and the control unit gas separation in the form of a cylinder which is placed over an additional Converter product flow throughout its length, communicated with him in its length and has a fitting on the output.

Additionally: site gas outlet configured to provide linear velocity of the gas stream therein not more than 10 cm/s; a pipe for supplying liquid hydrocarbon emulsion is made in the form of a pipeline to supply gazoochistnoe emulsion; node gas outlet communicated with the additional Converter product flow radial channels; node gas outlet communicated with the additional Converter product flow slot channel.

The essence of the invention lies in the fact that the technology requirements, in some cases, directly in field conditions do not require the maximum achievable separation of water from oil. Therefore, the necessary degree of separation it is possible to perform directly in field conditions due to the so-called effects of pipeline demulsification provided on hot-regulation of hydrocarbon gas content in the liquid phase. In the particular case it seems to be important for the organization, for example, regulation of the viscosity of the well production is an important indicator to ensure the transport of the products on infield or pipelines.

The device is characterized by the presence of additional site - additional transducer flow of well production. The requirements to the node of the main Converter product flow remains the same. This node is used for the destruction of the natural stabilizers liquid hydrocarbon emulsion on the phase boundary, in particular, are represented by oil and water. This is ensured by the creation of this site high turbulent flow, characterized by the Reynolds number of not less than 200000. Based on this condition, this unit is designed in the form of a cylinder with a length of 5-10 diameters. The angle of taper constricted part of the pipeline is determined by the minimum pressure losses at sharp narrowing of the stream. The extended part of the pipeline provides a gradual increase in the scale turbulent pulsations, increasing the probability of collision of the fine droplets of water, deprived of natural stabilizers of emulsions, and their consolidation with simultaneous prevention is any flow of products is made in the form of a cylinder (pipe) diameter, the large diameter of the main Converter flow of well production. Additional Converter product flow is placed horizontally and is arranged to provide laminar or, in extreme cases, transient hydrodynamic regime of the flow (flow of the liquid phase, characterized by a Reynolds number of not more than 10000. In the upper part of the additional transducer stream enters the gas flow (rich gas) with drip oil. To separate this oil serves as the site of the gas outlet, placed on additional Converter product flow. Due to the fact that the gas in the process flow is allocated permanently (not all at once and not only at the initial plot) provides for the possibility of selection of gas throughout the length of the optional Converter flow. This site gas outlet located above the additional Converter product flow along its length and communicated with him throughout its length. Thus, the auxiliary transformer flow through the whole thread (in the transverse direction and length) is the exhaust gas into the intended site. As a result, in the upper part of the additional transducer flow moves partially dehydrated oil from ostatochnymi part of the additional through the whole thread (in the transverse direction and length) is the exhaust gas into the intended site. As a result, in the upper part of the additional transducer flow moves partially dehydrated oil from residual or through gas. The amount of gas in the oil is proportional to the pressure in the device. In the lower part of the additional transducer flow of moving water to drip oil. In the conditions created by the hydrodynamic regime and under the action of gravitational forces, manifested in this mode, there is a fractionation of the mixture. Essentially additional Converter flow node performs the role of horizontal sedimentation tank in which there is a separation of the base along the way, the extracted water and the purification from a drip of oil under the action of gravitational forces. In addition, in the lower part of the site, additional conversion of the stream may contain impurities in the form of, for example, of sand carried from the well together with the production wells. These impurities are removed from the device through the site allocation fractions (in the drawing conventionally not shown). Additional thunk thread, made in the form of a cylinder, has a diameter (D, cm) and length (L, cm), which are calculated by the following formulas:
gdest liquid hydrocarbon phase, cm/s;
the viscosity of the hydrocarbon phase, the SDR;
- the residence time of the hydrocarbon phase in the additional Converter stream, in seconds.

The method is as follows.

According to the method of taking the product (gas-liquid hydrocarbon emulsion) from the well. Carry out heated products. Then the hydrodynamic processing of products. It is carried out in the turbulent regime with the transfer of production wells in different state - with the destruction of natural gas from the liquid hydrocarbon phase to regulate the pressure at which carry out additional hydrodynamic processing of products.

The regulation can be carried out by the gas pressure at the site of removal of the gas.

The requirements for the degree of gas separation can be different. In particular, if the degree of separation of the gas from the liquid hydrocarbon phase is regulated depending on the degree of mobility of production wells in highways. At high hydraulic resistance in the line (high pressure) the degree of mobility products (viscosity) reduce, for example, the reduction in the degree of separation (removal) of natural gas.

The optimal limiting conditions is.

The drawing shows a General view of the device.

The device includes a pipe 1 for supplying liquid hydrocarbon emulsion, the site of heated products 2, site destruction of natural stabilizers hydrocarbon emulsion. This site has a narrowed part 3 of the pipeline, the flow Converter products in the form of a cylinder 4 and the extended portion 5 of the pipeline. There is also a site allocation phase 6 production and pipelines connecting the nodes of the device. In accordance with the invention the device is provided with an additional Converter product flow. It is made in the form of a horizontally placed cylinder 7, is arranged to provide hydrodynamic flow regime liquid phase, characterized by a Reynolds number of not more than 10000. This node is placed between the node destruction of natural stabilizers hydrocarbon emulsion (or rather its extended part 5) and node allocation phases of the product 6. On additional Converter flow products posted by the control unit gas separation. This unit is designed in the form of a cylinder 8, which is placed on additional Converter product flow 7 throughout its length and communicated with him throughout its length. The output node of the exhaust gas is ageny.

For example, in the particular case of the specific capacity of the well fluid is 10000 m3/day, cut - 62%, the viscosity of the emulsion coming from the well - 12 SDR. When the residence time of the liquid hydrocarbon phase (a derivative of the original emulsion) in the secondary node flow transformations 300 with the defined parameters of this node, namely the diameter of this site is 1220 mm, length - 29 m Hydrocarbon well production, in particular commercial mixture of oil and gas with water in the form of an emulsion, through a dedicated pipe 1 enters the node heated products 2, where it is heated to the required temperature. The pipeline 1, in order to prevent the formation therein of gas hydrates that violate the design mode of the device, may also be provided with heating or at least activities that prevent sudden temperature changes, characteristic of severe climatic conditions.

Further, the products are delivered to the site of destruction of natural stabilizers hydrocarbon emulsion 4-6, where under the action of turbulent hydrodynamic regime is predispersal emulsified water droplets with increasing interfacial surface the additional Converter product flow 10 in the form of a cylinder length, in the particular case of 29 m and a diameter of 1220 mm In it due to different hydrodynamic flow regime, there is a division (up to the required limit) the principal amount along the way, the extracted water and the purification from a drip of oil.

In this mode the gas separation from the liquid hydrocarbon phase can be adjusted depending on the desired viscosity of production wells, which determines in turn some of the key parameters in the transport line (pressure, flow rate, wear on the internal surfaces etc).

Eventually, under field conditions can be quickly implemented with minimal time and cost, the separation of production wells in the device, simple in manufacture and operation. Separated thus the production of the well is prepared for further infield transport or, in some cases, for transport to the customer.

Sources of information
1. RF patent 2045982, 20.10.1995.

2. RF patent 2149672, 27.05.2000.


Claims

1. The method of separation of production wells, including her rise from the well in the form of a liquid hydrocarbon emulsion, heating products, hydrodynamic processing of products that the AI characterized in that after the hydrodynamic treatment of products in the turbulent regime implementing the additional hydrodynamic processing of products, ensuring hydrodynamic flow regime liquid phase, characterized by a Reynolds number of not more than 10000, and with separation of the principal amount of associated water and gas from the liquid hydrocarbon phase, and the degree of gas separation from the liquid hydrocarbon phase to regulate the pressure at which carry out additional hydrodynamic processing of products.

2. The method according to p. 1, characterized in that the separation of gas from liquid hydrocarbon phase is carried out with the possibility of a linear gas flow rate of not more than 10 cm/s

3. The method according to p. 1 or 2, characterized in that the degree of gas separation from the liquid hydrocarbon phase is regulated depending on the degree of mobility of production wells in the transport line.

4. The method of separation of production wells in one of the paragraphs.1-3, characterized in that the degree of gas separation from the liquid hydrocarbon phase to regulate the pressure of gas in the host gas outlet.

5. Device for the separation of production wells, including a pipeline to supply products in the form gazozhidkostnoi emulsion, having a narrowed part of the pipeline, the flow Converter products in the form of a cylinder and the extended part of the pipeline, site drainage phases of production and pipelines connecting the nodes of the device, characterized in that it is provided with an additional Converter product flow in the form of a horizontally placed cylinder, is arranged to provide hydrodynamic flow regime liquid phase, characterized by a Reynolds number of not more than 10,000 and placed between node destruction of natural stabilizers hydrocarbon emulsion and site drainage phases of production, and the control unit gas separation, made in the form of a cylinder which is placed over an additional Converter product flow throughout its length, communicated with him in its length and has a fitting on the output.

6. The device under item 5, wherein the node of the exhaust gas is arranged to provide linear velocity of the gas stream therein not more than 10 cm/s

7. The device under item 5 or 6, characterized in that the pipe for supplying liquid hydrocarbon emulsion is made in the form of a pipeline to supply gazoochistnoe emulsion.

8. Device according to one of paragraphs.5-7, characterized in that the node of the drain of one of the PP.5-7, characterized in that the host gas outlet communicated with the additional Converter product flow slot channel.

 

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SUBSTANCE: method includes mixing water-oil emulsion with drain water in line of inlet of first electric hydrator by dispersing drain water in volume 8-15% from volume of prepared oil at temperature 40-50°C. As washing water drain water is used from same oil deposit with mineralization less than saturation limit.

EFFECT: higher efficiency.

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