UA123417C2 - METHOD OF MAXIMIZATION OF FLUID PRODUCTION USING AN ELECTRIC PUMP - Google Patents

Abstract

The method of maximizing fluid production using an electric pump includes setting the maximum number of engine strokes based on measurements of at least the engine temperature and the pressure at the pump. To reduce the complexity of the method provided satisfactory functionality of the equipment and its adaptability to dynamic changes, the maximum number of engine strokes is maintained in a range not exceeding the value of the emergency engine temperature and the value of total decompression at the pump, increasing or decreasing the number of engine strokes depending from cooling, normal operation, heating or emergency engine temperature level, as well as saturation, normal operation, initial decompression or complete decompression at the pump inlet. The validity of the obtained temperature and pressure values is determined with the help of a microcontroller, establishing their correspondence to the previously formed range of valid values, taking into account the time intervals of engine stroke changes, taking into account the conditions of obtaining the measured values. The formation of the range of measured values is carried out on the basis of a sample of previously obtained data, which is formed taking into account the pre-set permissible error and the number of values included in the range of values. In this case, each measured value that repeats the previous or exceeds the pre-set error is not taken into account, and each new range of values is formed after successively obtaining several measured values that exceed the pre-set tolerance relative to the previous range and do not exceed the pre-set tolerance. . In this case, the pre-set permissible error is maintained during the process of maximizing fluid production, regardless of the average value of the measured values of each range.

Description

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The invention relates to the field of oil production, methods for regulating fluid flow in wells, including measuring temperature or pressure, designed to maximize fluid production using an electric pump.

Measuring motor and/or electric pump parameters in the well to maximize, intensify or optimize fluid production is a widespread practice in the field of oil production.

A method of operating an electric pump is known, which includes measuring the characteristics of the well or the characteristics of the device associated with the well; generating the first control signal to indicate a change in pump operation; generating a second control signal to indicate a change in the operation of another device associated with the well; and the degree of change of each of the first and second control signals depends on the measurement result and on the known influence caused by sending at least one of the mentioned first control signal to the pump or the mentioned second control signal to the additional device; and sending the first control signal to the pump and the second control signal to the additional device associated with the well (0510125584 (82). Mo.

O52O1315036599; arriiea 14.11.2013; fish dae 13.11.2018). The disadvantage of the method that implements this system is the need for operator intervention after collecting measurement data to take appropriate actions to protect the pump, which indicates the limited functionality of the system.

A method of extracting fluid from a well is known, which includes: determining a first setting of a first device using a processor, in which the first device is used to extract fluid from a well at a first flow rate; selecting a set of parameters using the processor, wherein the set of parameters includes a parameter relating to the operability of the second device and a plurality of parameters selected from the group consisting of flow rate, pressure, temperature, presence of a selected chemical, water content, sand content, and speed of chemical injection; determining a second setting for the first device using a processor that provides an increased lifetime of the second device and a second flow rate for the well fluid relative to the first rate

From the flow, using the selected set of parameters as input to the computer model, in which the second setting is determined after the first; as well as saving a specific second setting on the corresponding medium (57711486 (82). 5uzhiet apa Meipsa

Tog Mopiyugip Rnuzis! Sopaiiop oi Rhodisiop UUeiy Ediirtepi apa Sopigoiiyipa UUeiy! Rheodisyopus /

Tpidrep Vgiap I. eyi a)..; arriisapi VaKeg Nydpez Ips. - Arry. Mo. O520070737313; received on April 19, 2007; fish gives 04.05.2010). The method further includes operating a well corresponding to a second setting of the first device and determining the performance of the well based on the particular setting. The method additionally includes forecasting the occurrence of one of the following factors: water breakthrough, cross-flow condition, malfunction of the device installed in the well; as well as determining the second parameter based on such a forecast.

The method additionally includes sending a message related to the second setting to at least one of: the operator; a place remote from the well. The parameter related to the performance of the second device refers to at least one of: an electric submersible pump; valve; valve; casing string; pipes carrying liquid from the well to the surface; sand filter.

Like the previous analogue, in the process of implementation, this method involves operator intervention, which reduces the level of automation. In addition, the use of predictive models complicates its implementation. Also, in the method of increasing Ffluid production, the setting of ranges according to the specified parameters of flow rate, pressure, temperature, etc. is limited, which reduces the functionality of the equipment and its adaptability to dynamic changes. There is practically no possibility of filtering the signal, which can have a negative effect, for example, in conditions of interference on the line.

The method of intensification of oil and gas production is the closest to the claimed invention

IKO218893402. The method of intensification of oil and gas production / M. P. Pasechnyk, E. P. Molchanov,

A. Sat. Koryakov; applicants ODO "Sybneft-Noyabrskneftegazgeofizika", Pasechnyk Mikhail

Petrovych, Molchanov Yevgeny Petrovych, Koryakov Anatoly Stepanovych. - 3. Mo 2000117226/03; statement 07/04/2000; published 10.09.20021. According to the method, the parameters of the production process are controlled, geological and technical measures are carried out based on the control data, aimed at influencing the formation to increase the flow of fluid. The impact on the formation is carried out during the mining process by varying the parameters of the mining process and continuous control of these parameters in geological and technical measures. This is done automatically. As the parameters of the production process, the most significant for increasing the inflow are chosen: fluid well pressure, temperature, humidity, and fluid density. They are fixed with the dynamics of changes in these parameters depending on the frequency of rotation of the electric motor. The aforementioned parameters of the extraction process and the amount of fluid inflow are adjusted through the control unit to maintain optimal values by varying the frequency of rotation of the electric motor. The time of completion of geological and technical measures is determined by the moment of optimization of the parameters of the production process and the amount of fluid inflow. In order to allow the parameters of the production process to influence the formation, the supply system and the suction system of the pump are ringed with the lower and upper holes in the column of pump-compressor pipes and separated from the formation zone by a packer.

The disadvantages of the given invention include the need to carry out special geological and technical measures to increase production, which increases the complexity of implementing the method. Also, in the process of increasing fluid production, it is practically not possible to establish ranges for the estimated parameters, which reduces the functionality of the equipment and its adaptability to dynamic changes.

The claimed invention is aimed at reducing the complexity of the implementation of the method under the condition of satisfactory functionality of the equipment and its adaptability to dynamic changes.

The solution to the task is determined by a set of the following essential features.

The method of maximizing fluid production using an electric pump includes setting the maximum number of engine strokes based on measurements of at least engine temperature and pump intake pressure. The maximum number of engine strokes is maintained in a range, the limit of which does not exceed the value of the emergency level of the engine temperature and the value of full decompression at the pump intake, increasing or decreasing the number of engine strokes depending on the normal operation, cooling, heating or emergency level of the engine temperature, as well as normal operation , saturation, initial decompression or full decompression at the pump intake, while determining with the help of a microcontroller the validity of the obtained temperature and pressure values, establishing their compliance with the previously formed range of valid values, taking into account what the time intervals of the engine stroke change are adjusted, taking into account the conditions for obtaining the measured values values, while forming a range of measured values

Zo is carried out on the basis of a sample of previously received data, which is formed taking into account the preset permissible error and the number of values that are included in the range of values, while each measured value that repeats the previous one or exceeds the preset error is not taken into account, and each new range values are formed after successively obtaining several measured values that exceed the preset permissible error with respect to the previous range and do not exceed the preset permissible error with respect to the given range, while the preset permissible error is preserved during the process of maximizing fluid production regardless of the average value of the measured values of each range.

The essence of the claimed technical solution is explained, but not limited, by the graphic material presented in the drawing - an example of the implementation of a method of maximizing fluid production using an electric pump.

The drawing shows an example of implementation, according to which the pump intake pressure and engine temperature are varied by changing the engine strokes to achieve optimal conditions for maximizing fluid production using an electric pump.

In the process of implementing the method, the data of the engine temperature ranges and the pressure at the pump intake are entered, and the time intervals of the system response for specific conditions can also be set. The time range can be determined and adjusted, taking into account the conditions for obtaining the measured values, for example, due to the presence or absence of obstacles on the line, this range is increased or decreased accordingly. The status of the engine temperature, pump intake pressure and engine speed are received as output data.

The specified temperature statuses can have, for example, the following designations: cooling, normal operation, heating and emergency engine temperature level, data invalidity. The indicated pressure statuses can have, for example, the following designations: saturation, normal functioning, initial decompression and full decompression at the pump intake, invalid data. It has been empirically established that such ranges between the specified statuses are the most significant for effective and accurate adjustment of the engine strokes in the process of fluid extraction.

Measured data is obtained using appropriate sensors installed in submersible equipment. The results are set and processed, and the motor is controlled by the bo microcontroller.

The range of valid values and the permissible error are formed on the basis of, for example, previously obtained empirical data.

The method is carried out with the use of sensors that provide accurate data, which makes it possible to ascertain the presence of an invalid value by obtaining a value that repeats the previous one.

For example, during the implementation of the method, a linear motor was used, on which the number of strokes per minute was increased from the 1st to the 17th until the maximum permissible engine temperature of 1507 C was reached with an error of 1" C. The number of strokes per minute was increased until the minimum permissible pressure was reached intake 54 atm. The maximum number of engine strokes per minute was maintained when reaching the specified temperature and pressure ranges, which made it possible to achieve the maximization of fluid production.

The given automation of the implementation of the method when using such indicators as the pressure at the pump intake and the temperature of the engine allows to reduce the complexity of the implementation of the method.

This technical result is achieved by maintaining the satisfactory functionality of the equipment and its adaptability to dynamic changes due to the creation of ranges of measurable values that determine the need to increase, decrease or maintain the engine strokes in order to achieve maximum fluid production, due to the creation of an algorithm for adaptive changes in the time intervals of engine stroke changes, as well as due to the implementation of the algorithm for determining the validity of the measured values.

Claims (1)

FORMULA OF THE INVENTION A method of maximizing fluid production using an electric pump, which includes setting the maximum number of engine strokes based on measurements of at least the engine temperature and pressure at the pump intake, which is characterized by the fact that the maximum number of engine strokes is maintained in a range that does not exceed the emergency level engine temperature and the value of full decompression at the pump intake, increasing or decreasing the number of engine strokes depending on the cooling, normal operation, heating or emergency level of the engine temperature, as well as saturation, normal From the operation, initial decompression or full decompression at the intake of the pump, while determining with the help of a microcontroller the validity of the received temperature and pressure values, establishing their compliance with the pre-formed range of valid values, taking into account what the time intervals of the engine stroke changes are adjusted, taking into account the conditions for obtaining the measured values, at the same time, the formation of the range of measured values is carried out on the basis of a sample of previously obtained data, which is formed taking into account the preset permissible error and the number of values included in the range of values, while each measured value that repeats the previous one or exceeds the preset error is not taken into account , and each new range of values is formed after successively obtaining several measured values that exceed the preset permissible error with respect to the previous range and do not exceed the preset permissible error with respect to this range, while The preset tolerance is maintained during the process of maximizing fluid production regardless of the average value of the measured values of each range. : and x - VE Emergency | ! ; ! tyaev | | and and and Heating Normal | And and and E Environmental protection! ' ; : shdsmyshi ni shishnnke Saturation of knowledge mnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnny and ! | and Normal | | IS ; ; functioning of І and ! Initial and Full pressure! th decompression Y I I ! I I I sho i Reduction of moves Z drymninya moves B ; dnigun engine Increase in dnigun moves