System, method and carrier read by computer for calculation of well injection flow rates produced by electric submersible pumps. RU patent 2513812.

FIELD: oil and gas industry.

SUBSTANCE: group of inventions pertains to monitoring of parameters for wells with wellhead and bottomhole equipment. More specifically these inventions specify the system and method for determination and calculation of the well flow rates produced by electric submersible pumps. The invention concept is as follows: the method for determination of flow rate through electric submersible pump contains stages with the following operations: supply of electric energy to an electric submersible pump from the surface distributing unit; readout of intake pressure by means of processor at the first pressure gage from the well bore bottom in regard to the electric submersible pump and pressure at the output of the second pressure gage; readout of voltage and current values by means of the processor; readout of at least one static value by means of the processor; calculation by means of the processor of flow rate passing through the electric submersible pump, whereby ratio of efficiency factor to the flow rate is calculated with entry of read voltage and current values into power equilibrium equation; non-dimensional flow rate is obtained with entry of the calculated ratio of efficiency factor to the flow rate into statistic data; flow rate is calculated on the basis of non-dimensional flow rate and diagram of calculated flow rates is drawn.

EFFECT: improving efficiency of monitoring.

20 cl, 8 dwg

CROSS-REFERENCE TO RELATED APPLICATIONS

This proposal deals with the preliminary application №61/253662 on a U.S. patent, filed on October 21, 2009, and preliminary application №61/373129 on a U.S. patent, filed August 12, 2010, the date of filing whose priority is claimed this proposal and are included in this application by reference.

THE TECHNICAL FIELD

Disclosure refers to the monitoring of wells downhole and wellhead equipment. More specifically, the present disclosure refers to systems and methods for determining and calculating the costs in wells that are created Elektromagnitnye pumps.

THE LEVEL OF TECHNOLOGY

In the oil industry wells often provide constant measuring devices. Now to get reduced production costs and high extraction ratio wells also use the systems of Supervisory control and data acquisition. For example, over 11,000 elektromagnitnykh pumps (APN) from Schlumberger have been instrumented in the last six years, and it was possible to conduct remote monitoring of more than 1000 wells with use of systems of Supervisory control and data acquisition. Despite the placement of a large number of devices and reliability of connection, start the measurement of expenditures in real time is usually delayed, and they were manual and episodic in nature. In most cases well have once a month, and the results of measurements of expenditure manually type it in databases on the dynamics of production.

In the most common method of flow measurements using test separator, which is a tank, in which direct extraction to measure the flow of oil, water and gas from wells. Tests are usually done on a monthly basis, but in many cases, the frequency of testing even less for logistical reasons. One drawback to the use of modern test separators is that many wells operate at a cost below the threshold needed to obtain acceptable accuracy. In addition, methods of measurement of expenses using a test separators do not provide frequency of tests, repeatability or permissions necessary for the education of accurate diagram of costs over time.

Previous attempts expenditure monitoring wells wells Elektromagnitnye pumps using data downhole gauges were made with the use of differential pressure at the pump and the pressure at the pump outlet, depending on the curve of consumption. For this method, reliable with many applications, requires the NODAL software analysis (available from Schlumberger) to calculate the average specific density passing through the pump fluid for conversion of measured pressure drop in differential pressure. Therefore, the method is only meaningful in the case of steady-state conditions, which is a mandatory requirement for the analysis of NODAL™. In addition, this method is difficult to apply at high gas fraction (GF), as it can cause interspersed flow of oil and gas, and this means that the well will no longer be in a steady state.

BRIEF DISCLOSURE

In this proposal discovered a way of determining the expenses for the well equipped electropherogram pump (APN). Electrical energy is supplied to electropherogram pump and regulated land switchgear. The processor takes the pressure on the intake and outlet with one or two pressure gauges, installed in the borehole. The processor takes the voltage and current. The processor also takes at least one static value. Processor calculates the ratio of the coefficient of performance (COP) to the flow accept input voltage and current in the equation of balance of power. The processor receives the dimensionless flow when entering calculated relationships efficiency for consumption in static data. Processor calculates flow based on the dimensionless flow. Processor forms the chart calculated costs.

Implementation of systems for monitoring of flow of fluid in the borehole includes elektromagnitnoi pump (APN), located in equipment for well completion. Land distribution device is electrically connected to electropherogram pump, and ground switchgear provides electricity for actuation elektromagnitnogo pump. The pressure gauge on the receiving side is connected with electropherogram pump and measures pressure at the reception elektromagnitnogo pump. The pressure gauge on the output side is connected with electropherogram pump and measures pressure at the outlet elektromagnitnogo pump. Voltmeter is connected to the ground switchgear and measures the voltage supplied to elektromagnitnoi pump. Ammeter is connected to the ground switchgear and measures the current (or select) a motor elektromagnitnogo pump. Land distribution unit regulates the supply of energy with the known and/or measured frequency. The processor performs read by a computer program stored on machine-readable media that, when executed, causes the processor to perform the job. The processor takes pressure measurements at the reception, the outlet pressure, voltage, current and frequency. Processor calculates the flow through elektromagnitnoi pump when entering values into the equation of balance of power, based on electropherogram the pump.

Machine-readable media, unveiled in this proposal encourages processor periodically to take voltage, current, frequency, pressure on the intake and outlet pressure. The processor will calculate the efficiency of the flow accept input voltage, current, frequency, pressure on the intake and outlet pressure in obezatelino the equation of balance of power. The processor receives dimensionless consumption by linking relationships efficiency to flow taken by the characteristics of the pump. Processor calculates flow based on the dimensionless flow. Processor forms the chart calculated costs.

BRIEF DESCRIPTION OF DRAWINGS

The drawings:

Fig. 1 - type of equipment for well completion, provided electropherogram pump;

Fig. 2 - block diagram of the sequence of actions that shows how to obtain the expenses for the well equipped electropherogram pump;

Fig. 3 - the following chart illustrates an example of the relationship of the efficiency of the pump to consumption depending on the consumption, in one-dimensional form for concrete pump;

Fig. 4 - example of a graph calculated costs;

Fig. 5 - example of a graph modeling the pressure in the reservoir on the basis of the calculated flow, which gives an idea of the transition process;

Fig. 6 graphic illustrating examples of measured pressure and flow rate and calculated flow;

Fig. 7 - example of a chart that illustrates the measured and calculated the costs with instant surge, due to the high content of free gas at the pump; and

Fig. 8 - graph illustrating examples power factor, efficiency, speed and curves of the current characteristics of the electric motor with variable speed.

DETAILED DISCLOSURE

The following description applies to some realizations and is designed to provide an understanding of the accomplishments. Description in no way intended to limit the amount of any present or future related claims.

Used in this application, the terms "above" and "below", "top" and "bottom", "upper" and "lower", "up" and "down" and other similar terms, indicating the relative position above or below this point or element used in this manual for a more explicit statement of accomplishments. However, in case of application of equipment and methods, intended for use in wells that are deviated or horizontal, as appropriate, such terms may indicate left to right, right to left or position on the diagonal.

In Fig. 1 shows one example of equipment 10 to completion within a barrel 12 wells. Equipment 10 to completion includes elektromagnitnoi pump (APN) 24. There are many examples of possible architectures of completion, which includes various other downhole tools such as packers, the bypass tube, the capsule elektromagnitnogo pump, which presents a small number of such tools. Disclosed in present systems and methods are architecture-dependent completion strings used in your application, but from the use elektromagnitnogo pump. Although in this application disclosure system and method focused on oil and gas wells, it is clear that the implementation can be used for liquids of any kind, retrieved electropherogram pump. Do not create restrictions examples include: hydrocarbons from oil wells, water from water wells, water from geothermal wells, water from a gas well or hydrocarbons from the sump. In the case of oil wells elektromagnitnoi pump 24 can be placed in the equipment 10 to completion to increase hydrocarbon production.

Elektromagnitnoi pump 24 include a motor 26 and pump 30. Motor 26 activates the pump 30 to increase production of hydrocarbons on the surface. In addition, elektromagnitnoi pump 24 includes 32 gauge on the side of the reception, which can be an integral part elektromagnitnogo pump 24 or can be a separate device. Manometer 32 on the receiving side can be part of multiple sensors, which includes a number of sensors, well-known specialist in the art. Manometer 32 receive-side measures the pressure upstream relatively elektromagnitnogo pump 24. In addition, elektromagnitnoi pump 24 includes gauge 34-side output, which can be an integral part elektromagnitnogo pump 24 or can be a separate device. Manometer 34 on the output side measures pressure lower flow relative elektromagnitnogo pump 24. Although this description is presented gauges that are permanent components of the tubing with electropherogram pump, it should be clear that in other implementations, you can use the gauge with memory. In case of gauge with memory gauge set temporarily in completion equipment, as measured by the gauge pressure recorded on machine-readable media, which is inside a pressure gauge or on the surface. After a certain period of time, such as a month, a pressure gauge with memory extracted from wells and measured pressure data is loaded into the computer system for processing. In some implementations temperature sensor (not shown) are included in elektromagnitnoi pump 24 or are part of multiple sensors. The temperature sensors measure the temperature of hydrocarbons receive-side elektromagnitnogo pump and also measure the temperature of the motor 26.

Motor 26 elektromagnitnogo pump 24 receives electrical energy distribution devices 36, usually located on the surface, out of equipment for well completion. Switchgear 36 regulates the supply of electricity to the electric motor 26, which comes with a generator or from engineering networks (not shown)that should be obvious to a person skilled in the art. In the displayed implementation of the distribution unit is a device 36 speed control (UUCW); however, it does not include any restrictions on the possibilities of using switchgear options accomplishments. Electrical energy is supplied with the device 36 speed control to electropherogram pump 24 on the electric wire 38. The device 36 speed control is connected to a certain number of sensors or contains them to monitor the status of the device 36 speed control. In one exercise device 36 speed control includes voltmeter 42, ammeter 44 and the sensor 46 frequency. All these three devices measure the operational characteristics of a device 36 speed control, namely voltage (N), current (T) and frequency (H), respectively. These sensors can monitor the performance of the device 36 speed control when any of the range of available periods update data. It is clear that as an option the device 36 speed control may not have voltmeter, ammeter and rate. In this case, you need a separate ground sensors 42, 44 and 46. In the further implementation of one or more values of voltage and frequency are brought to the device 36 speed control technician as production inputs. In this case, the control unit of frequency of rotation works, supplying electric energy with these characteristics.

Controlled work, data is transferred from the device 36 speed control is integral to the surface panel 48 for further processing. The integral surface panel 48 also connected by lines of communication with the gauge 32 receive-side and with pressure gauge 34 on the output side. The integral surface panel accepts controlled pressure from 32 gauge on the side of the reception and the outlet pressure with a gauge 34 on the output side. Although in some implementations of integrated ground-based panel 48 may take five analog signals (pressure at admission, discharge pressure, voltage, current and frequency) in real time or near real time, in the variants of implementation of the processor can receive analog data with pressure gauges memory, which include buffer or another temporary delay. You can use both methods, and they are not supposed to limit the amount of that disclosure. In addition, the update rate can change in wide limits at intervals of seconds to months. In one exercise of measured value integrated land-based panel 48 every day, hour or minute; however, these periods updates are only approximate and are not supposed to limit the amount of that disclosure.

Specialist in the art must be clear that the components of the communication and processing of this system can give a variety of configurations within the scope of this disclosure. In one such configuration, the processor 50 is not built into the integral surface panel 48, but instead is a local information wired or wireless connection with it. In such implementation processor 50 can be portable computer (not shown)used by the operator of the well, which establishes information link with the integrated land-based panel 48. A laptop computer can include a machine-readable carriers 52 and 54. In the version of the configuration integral surface panel 48 transmits the measured values on the remote computer or server on the wired, wireless, or satellite information line. Thus, the processor 50 and machine-readable carriers 52 and 54 are located at a distance from the integral surface panel 48. In each of these accomplishments integral surface panel 48 performs the same function as a router data that takes periodically measured values and processes them to the degree necessary, for transmission to the processor 50.

In Fig. 2 shows the block diagram of the sequence of actions that illustrate the implementation of the method 100 determine the cost of equipment for well completion with electropherogram pump. The way 100 can be presented in the form of machine-readable programs on machine-readable media, 52, so when the processor 50 performs read by the computer program, the processor 50 performs a way 100.

In the way 100 accept these two kinds: the dynamic data that represent the measured values that change over time, and static data, which are not time-sensitive pieces of information. At the stage 101 accept dynamic data. These dynamic data include pressure from 32 gauge on the side of the reception and the outlet pressure with a gauge 34 on the output side. Dynamic data also include voltage, current and frequency controlled with appropriate sensors ground switchgear 36. In some cases, they may also include power factor, if the transducer is mounted on the switchgear. From the dynamic data periodically take a sample, but the frequency of samples of different values may be different.

At the stage 102 accept static data. Static data includes distinctive features or physical characteristics of the components of the well. Static data include information on the length and type of cables used in the well, the coefficient of transformation and pump type. Data such as the transformation ratio can be used directly in calculations. Information such as the length and type of cables that you can use to get the value, which is used in calculations. However, static data of other types, such as the type of the pump, provide a way to select a certain number of values representing identifiable characteristics of the component. Therefore, on the basis of a block of static data, such as the type of the pump, you can get values like "flow rate (Q BEP ) at the point of a higher coefficient of performance (COP)and the initial efficiency (n p ) pump". These values remain in the screening table, so they are easily accessible to the processor after identifying the type of the pump.

Then, as will be elaborated in this application in the future, at the stage 103 calculate the ratio efficiency for consumption, using equation (6), and dynamic data, and static data.

Getting equation (6)that, as noted above, used for calculating the ratio of the pump efficiency to consumption, will be explained in detail in this proposal in the future. This algorithm starts with the design of elektromagnitnogo pump so that power generated by the pump 30, was equivalent to the power consumed by the motor 26. This ratio can be expressed in terms of balance of capacities on the shaft between the pump and the electric motor in equation (1). It is based on the principle that electropherogram pump torque and rotational speed of the pump and motor equal at all times:

In the equation above contains the following variables:

Δ - difference ( P

i ) pressure on electropherogram pump, in pounds per square inch;

ETA p - efficiency pump. At initial calculations can be assumed that the pump is new and efficiency of the pump is determined based on the type of pump. Later, as the wear of the pump obtaining efficiency of the pump can be part of the flow calibration;

V m - the voltage at the motor in volts measured by the voltmeter ground switchgear. The voltage shall be adjusted to account for the energy loss during power cable from the surface to the electric motor. It is possible that in the future will be developed measuring instruments that will directly measure the voltage on downhole electric motor and to make immediate adjustments relative to the measured without the need for adjustments to take account of losses in the cable;

n m - as shown in Fig. 8, for more part of modern motor efficiency can be considered constant within a wide range of load ratios. The following equation is based on this assumption; however, when using electric motors previous generation can be an additional algorithm to calculate the efficiency of the motor depending on the load of the motor, e.g. current, voltage and frequency. In addition, if the load factor is below 50%, you can add an algorithm to calculate the efficiency depending on the measured voltage, current and frequency;

PF - power factor motor. Modern electric power factor is a constant in wide range of load ratios; however, as the wear and tear of the motor power factor may change and therefore must be calibrated over time. There are systems that allow precise direct measurement of real value PF, and in this case they should be used in contrast to the assumption of constant PF. Both methods are wealthy and not meant limiting the amount of that disclosure. In addition, if the load factor is below 50%, you can add an algorithm to calculate the efficiency depending on the measured voltage, current and frequency.

To simplify equations in some implementations it is assumed that the efficiency of the electric motor and power factor are constant values, however, the disclosure shall be limited to that.

In Fig. 8 presents the chart which shows the approximate curves power factor, efficiency, speed and voltage load for motor with variable speed, thus displayed a constant value efficiency and power factor for the load ratios between 50% and 100%. More traditional motors do not have permanent power factor and efficiency in such a wide range of load ratios.

We should be aware that although the constant in equation (1) is defined using non-metric units, the same equation will work in the case of a standard or any other units, subject to the appropriate transformations.

When using the above measurements and assumptions for the equation (1) can be calculated flow through the pump in the wells of the pressure. Calculated consumption is actually an average flow through elektromagnitnoi pump. In fact, the flow rate at the inlet of the pump is significantly different from the expenditure on output due to the different compressibility of gas and oil. To obtain brought to the surface flow, you must use the ratio of the pressure-volume-temperature fluid, in order to correct for the effect of space factors of oil and gas in the reservoir. Alternatively you can simply perform a calibration of the well-known results of ground testing of the well and then use equation (1) for presentation in quantitative form relative changes.

The calculation of consumption, using only the equation (1) has advantages and disadvantages. Benefits arising from rate calculation using equation (1), is that the consumption of downhole collector in barrels per day can be calculated without knowing the ratio of the pressure-volume-temperature, and thus ensures the identification of changes in the flow rate and time stabilization for the well. In addition, when elektromagnitnoi pump has a small inertia, consumption, calculated thus, provides a view of fluctuations of consumption, or what is known as ripple or transients. They are caused by the pumping of fluids with high gas fraction (GF) and/or at start up and shut down the well. High frequency data samples of the gauge is required to capture these transitions. Approximate high sampling frequency corresponds to one measurement every minute. Consumption, calculated on the basis of equation (1), allows to obtain the curve of coverage depending on time. Examples of applications are described in this proposal in more detail in relation to the different realizations, including diagnosis elektromagnitnogo pump (Fig. 4), building a simulation model collector on the basis of theory of superposition (Fig. 5) and diagnostics collector (Fig. 6), but they are not supposed to limit the amount of applications for implementation of systems and the ways disclosed in this proposal.

To get consumption under standard conditions, to be adjusted on the basis of known values in the ratio of the pressure-volume-temperature or calibrated against a known accurate testing of wells.

In addition, equation (1) does not contain as variable frequency, however, consumption depends on the frequency. In case of application elektromagnitnogo pump on a fixed frequency, there is no need to consider the speed of the motor. However, in applications which use the device for control of rotation frequency, it is necessary to take into account any change in frequency.

After taking dynamic data at the stage 101 static data taking at the stage 102, the values for the equation (1) be known for with the exception of discharge (Q p ). Equation (1) can be converted to obtain equation (2):

Equation (2) can be solved against known values to find the solution for medium flow through elektromagnitnoi pump. Since the efficiency of the pump is a function of consumption, to find a solution for consumption, the ratio of consumption to efficiency is calculated as a function of voltage, current, efficiency of electric motor, power factor and differential pressure, laid down in equation (2). As the flow rate (Q p ) to efficiency (n p ) pump is known for a unique function for each pump type, therefore, you can calculate flow. Note that for the solution of equations relative to consumption, you can use the ratio of consumption to efficiency or the ratio efficiency for consumption. However, from a mathematical point of view is usually more convenient to use the ratio efficiency to consumption, which is the inverse value of equation (2).

However, the equations (1) and (2) do not contain as a variable speed motor. As noted above, in case of application elektromagnitnogo pump fixed frequency it is not necessary to take into account, except when there are changes in the frequency of rotation, due to the energy production process. However, the implementations that use the device speed control, any change frequency should be taken into account. Frequency component can be operated manually by asking family of curves (one for each frequency) for the function Q p /n p and n p /p and Q then performing numerical interpolation for the given frequency.

Alternatively, the solution can be obtained mathematically by otraslevaya relations flow to the efficiency of using values obtained on the basis of accepted static data. Equation (3)below is an example of the method used to otraslevaya consumption, which use consumption (Q BEP ) at the point higher efficiency, which is the value that is obtained based on the type of pump.

It should be noted that the flow Q BEP linearly proportional to the frequency, but is constant for a given geometry of the pump and the pump rotation speed. So after a precise definition of the type of pump Q BEP is a known value. Other ways of otraslevaya consumption, which introduces the dependence on frequency, you can also use, and proposed by the way, according to the equation (3) the scope of this disclosure is not limited.

The substitution equation (3) into equation (2) gives the version of equation (1), which is bezrazmernoi on the frequency of the device of control of rotation frequency:

When adding two additional amendments to the equation (1) balance of capacity formed algorithms, suitable for practical use in the systems and methods provided for in this proposal. In the first modification taken into account the energy losses in the power cable and transformer. In most applications it is impossible to measure the voltage of the electric motor directly on the motor, and so on the surface voltage (V s ) receive terrestrial distribution device or device of speed control. Equation (5) is an algorithm that corrects this. Equation (5) begins with equation (4)above, but the voltage (V m ) of the motor is replaced by a voltage (V s ) on the surface, as in equation is carried out correction of any voltage loss due to electric wire, spread down the equipment for completion between device speed control and electric motor. Loss of line voltage is subtracted from voltage (V s ) on the surface, this is (a) is an electrical cable loss. Value () is calculated on the basis of length of electrical wire and type of wire that can be taken with static data.

Using equation (5) allows to calculate flow elektromagnitnogo pump when measuring voltage and current on the surface, not on the motor elektromagnitnogo pump.

Finally, regarding frequency correction in equation (4), when elektromagnitnoi pump receives electrical power from device speed control, between device speed control and electropherogram pump can be located up transformer. Often to the available data concerning a step-up transformer is only output voltage device speed control, and in this case, the required ratio for consideration of its in your algorithm. In equation (6) introduced an amendment to equation (5) for accounting coefficient (R) of transformation, and therefore it is suitable for calculation of consumption elektromagnitnogo pump when using measurements of voltage and current (I d V d ) with the control device speed.

Thus, the algorithm presented in equation (6), is a modification of equation (1) balance of capacities, allowing to receive practical solution of the problem of flow monitoring elektromagnitnogo pump with controlled use of available values and accept the known characteristics of the device.

Further, consumption, calculated according to equation (6)represents the average consumption through elektromagnitnoi pump in real conditions. As discussed in more detail of this proposal, the calculation of the expense is in itself useful for the evaluation of downhole conditions. However, in some situations you may want to calculate the flow rate at the inlet tank tank oil. This consumption can be obtained on the basis of the algorithm for equation (6), additionally modifying equation in one of two ways. First, the ratio is the pressure-volume-temperature can be used to convert the downhole flow in real terms to the conditions of the reservoir tank oil. Second, the empirical relationship based on test wells, can be used for proper conversion to flow at the inlet tank tank oil.

As noted above, the efficiency of the (n, p ) of the pump and the factor (PF) capacity of the electric motor can decline over time due to wear and a build-up of deposits on components elektromagnitnogo pump at a time when elektromagnitnoi pump works. So when elektromagnitnoi pump originally placed in equipment for well completion, efficiency (n m ) of the motor, and factor (PF) capacity of the electric motor can be considered permanent, available from static data. Because these values may be reduced over time, they can be a source of error in the calculation of consumption elektromagnitnogo pump. Therefore, according to some realizations, to obtain the exact value of consumption, require periodic calibration. However, even with uncalibrated the costs are provided with accurate quality information and information on trends in consumption, as currently open systems and methods available analytical solution for calculation of consumption elektromagnitnogo pump that is not based on regression methods. Since the efficiency of a (n, m ) of the motor, and factor (PF) capacity of the electric motor are constant in the equation, any numeric error, available without calibration is only the shear magnitude of the calculated consumption. Even when algorithms are not calibrated and therefore computed values costs are inaccurate in absolute terms, calculations provides the basis for playback flow diagrams depending on time, which allows you to define quantitative trends when the workflow has a high repeatability, and have permission provided much of the sensors/tools currently available in the industry.

Thus, the solution provided by and in the manner disclosed in this proposal that is intended for the calculation of the expense is of better quality in comparison with the decisions provide preceding logical methods for consumption, as disclosed in the current system and how the calculation is made for the actual consumption on the basis of first principles, and not on the basis of empirical models or adjust settings.

Back to the block diagram of the sequence of actions from Fig. 2, where at the stage 101 accept dynamic data and on the stage 102 accept static data. At the stage 103 calculate the ratio efficiency for consumption, introducing dynamic and static data in the algorithm according to equation (6). As stated above, equation (6) is the generalized equation, which can be used in applications with a fixed or variable speed.

At the stage 104 receive the dimensionless flow. Let us briefly review the graphic image of Fig. 3, which is a graph 200 example of dependence of the efficiency of the pump flow rate. The pump of each type (on the basis of accepted static data) has an efficiency curve, which is provided by the manufacturer. Manufacturer efficiency curve is divided into consumption, to get the function 202 shown 200. At the stage 104 receive dimensionless flow, whereas the ratio of the calculated efficiency to the consumption of phase 103 and finding the proper flow rate. The graph 200 ratio efficiency to the expense deferred Y-axis, and the dimensionless flow (Q n ) deferred axis X. Therefore, at the stage 103 only example of the implementation of the calculated ratio efficiency for consumption could reach 30. The appropriate value of the dimensionless flow determined based on the function of 202 is 1.4. This example shows one way that at the stage 104 you can get the dimensionless flow. It is clear that this same process can be done mathematically, and the reference to Fig. 3 made for explanations.

Refer again to Fig. 2, where at the stage 105 calculate uncalibrated consumption. Uncalibrated consumption is calculated by entering get dimensionless flow from phase 104 in equation (3), established above. Since equation (3) was used for modification of equation (1)to equation (6) was included dimensionless flow, modified equation is also fair. The dimensionless flow is put thus in equation (3)and equation (3) can be solved relatively flow through elektromagnitnoi pump.

Because the dynamic data received at the stage 101, change over time, new costs calculated over time as updates to accept dynamic data, while these newly-calculated expenses at the stage 106 can be represented in a diagram with respect to time. This chart data uncalibrated costs can give valuable information on downhole conditions. However, as noted above, the efficiency of the (n, p ) of the pump and the factor (PF) capacity of the electric motor may change as wear elektromagnitnogo pump, and in the fall of load factor. So the diagram uncalibrated expenses received on stage 106, you are guaranteed to use without calibration for qualitative analysis and trending well characteristics. It should be clear that in some implementations and under certain conditions the graph uncalibrated costs can be accurately and in implementation of the system and method chart uncalibrated costs may represent an exact calculation of costs.

To guarantee the accurate correspondence received consumption exact instant consumption elektromagnitnogo pump, at the stage 107 perform the calibration equation. When calibrating on stage 107 use data on measurable costs taken at the stage 108. Data on the measured costs used for the calibration equations relatively to a specific state elektromagnitnogo pump and other conditions, presented in a particular application. Taken at the stage 108 data on measurable costs acquire productive testing well that can be carried out using test separator (or another device, such as multiphase meter)to get one or more intervals tests for direct consumption measurement. As noted above, a test using a test separator carried out only at the required intervals, usually once a month. The implementation disclosed system and the way it is possible to increase the time interval between testing, resulting in lower operating costs without any loss of data quality. Data on measured the cost of the test well is used at the stage 107 calibration equations using the ratio between the calculated flow (Q p ), we get on stage, 105, and the measured flow (Q, s )taken at the stage 108. In one exercise, the calculated ratio is applied to equation (6)is used at the stage 103. In the embodiment, the ratio is applied directly to each of the calculated uncalibrated costs. In some implementations this calibration can be used to calculate the adjusted values of efficiency (n p ) of the pump. Thus, you can monitor the efficiency of the pump as an indicator of the status and wear of the pump.

After calibration equations on stage 107 calibrated flow through elektromagnitnoi pump can be calculated for any newly adopted dynamic data. Thus, at the stage 109 form a calibrated diagram of expenses with respect to time. As will be described in more detail in this proposal, this chart calibrated costs over time can be used for the evaluation of wells or characteristics completion.

At the stage of 110 calculate the unsteady flow well. Total consumption in the well can be modeled using equation Q p =Q r +Q w . In this equation Q r is the expenditure from the reservoir into the wellbore. Q w is the flow rate of the well bore. Steady state consumption in a borehole is considered equal to zero, and all expense attributable to consumption of the collector. However, in the transition States (for example, upon termination/early production) flow rate of the well bore is not equal to zero. The flow value of the wellbore or unsteady flow is calculated at the stage of 110 during the transition process.

Below are two equations that can be used for calculating unsteady flow. Each of these equations can be used in the options accomplishments.

These equations As is the cross-sectional area between pump and compressor pipes and internal diameter of the casing string above the pump. The value of h is the depth elektromagnitnogo pump, which represents the height of the layer of a fluid over electropherogram pump at a measured depth. The value of P i is the pressure at the pump intake. The value of t is time. The value of p is the density of the fluid. After the decision of one of these equations is the unsteady flow becomes known.

In the above equation of unsteady flow rate can be changed in order to calculate the flow rate Q r from a header. Consumption of collector is useful to analyse manifold, especially during the analysis of the increasing and decreasing of transient processes.

At the stage 111 form in time dynamics chart unsteady costs, calculated on the stage 110. As will be described in this proposal in more detail, this chart unsteady costs over time can be used for the evaluation of wells or characteristics completion.

In Fig. 4-7 shows the graphs of the data tests that facilitate the consideration of different examples of applications of systems and ways disclosed in this proposal. Possible other uses, the use in these examples, the calculated consumption should not restrict the disclosure.

In Fig. 4 shows a graph, which shows the calculated costs elektromagnitnogo pump. In particular, in Fig. 4 graphically presents three values, which includes a temperature of 300 motor calculated costs 302 elektromagnitnogo pump and measured costs elektromagnitnogo pump (first and last data points, which marked the position 304)measured using a test separator.

One helpful feature of the system and the ways disclosed in this application, shown in Fig. 4 chart 300 motor temperature, showing a clear increase in temperature of 30 degrees during the year. It shows the position 306.

It should be noted that when the temperature is 300 motor is in a steady state, calculated chart 302 expenses and measurement 304 costs testing of well almost perfectly match. However, after performing in 308 number of temporary stops well shown schedule 310 frequency calculated consumption and measured consumption begin to diverge. Numerous temporary stop 308 cause transients 314 pressure and flow into the well. Transients do not contribute to the accurate flow measurements using test separator. So when the temperature of the motor begins to rise, measurements of flow rate using a test separator is not detected by the lowered consumption associated with this change. However, due to the high resolution and repeatability calculated flow rate display each of transition States 314, caused temporary stops the wells, and the trend 312 to reduce consumption, which coincide with increasing temperature 306 of the motor. The operator of the well watching these results can diagnose the cause of increasing the temperature of the motor, paying attention to reducing consumption elektromagnitnogo pump. This is a reduction of approximately 50 to 100 barrels (from 7950 to 15900 l) per day during the year is not found, this is the way of the measured costs 304 during well testing.

In the above example, due to the high resolution achieved when calculating costs elektromagnitnogo pump, the ways disclosed in this proposal are applicable in transient and steady-state conditions in the well. This allows you to apply only way data to all data without the need for separate periods of time on transient and steady-state periods of time. This capability calculation of flow rate during the transition States allows the use of open systems and methods for real-time monitoring of the hydraulic regime of wells during the pre-commissioning and quickly diagnose problems.

In addition, although the accuracy of calibration required, resolution, and repeatability of the calculated costs are provided regardless of calibration and are very high when using currently available in Metrology standard gauges elektromagnitnogo pump and other electrical measuring instruments. This allows you to detect changes of consumption in the range from 1 to 10 barrels per day (from 159 to 1590 liters/day). This feature is especially useful in wells with low costs, which are notoriously difficult to test, especially because of the need for a long-term test. Specialist in the art must be clear that the resolution changes mathematically when changes calibration, therefore, although a useful result of high resolution and repeatability of the calculated cost does not depend on the calibration, mathematically resolution when calculating changes.

In Fig. 5 presents an example of a chart that shows the simulation of the pressure in the reservoir. Modeling of pressure in the reservoir is made using the model of superposition, which is a mathematical method based on property, which consists in the fact that the solutions of linear equations in partial derivatives can be added to get another solution. The trend 400 pressure changes in the collector indicates the pressure decrease in nutritional well. As you can see in Fig. 5 from the rest part of the graph obtained by simulation pressure 402 at the reception corresponds to the measured pressure 404 at the reception. The accuracy obtained by simulation pressure on the administration is due to the fact that the chart calculated expenses reflected the transition States of consumption (discussed above), which contribute to the downward trend. Thus, Fig. 5 it is shown that the accuracy that can be obtained during a mathematical simulations based on the calculated consumption, achieved through disclosed in present systems and methods.

In Fig. 6 presents an example of a chart 500 showing the measured pressure 502, and expenses 506, and the calculated costs 504. In the left part of the chart 500, you may notice that during the steady state pressure 502 receive-side between the data of the chart 504 calculated costs and data on the measured costs 506 elektromagnitnogo pump is achieved good compliance. However, when the well pressure is increasing on the interval 508 about 100 pounds/2 inch (689,476 kPa), despite the achievement of high precision ±5% resolution and repeatability of measured costs are insufficient to identify trends in the increase of consumption. On the contrary, the calculated consumption 504 clearly there is a tendency 510 during the same period of time, and thus provides the basis for analysis and diagnostics of the collector. Identification of trends, similar 510, possible due to the high resolution and repeatability data on calculated costs achieved through disclosed in present systems and methods. In the example implementation, even if the chart 504 calculated costs was not properly calibrated relative to the measured flow 506 elektromagnitnogo pump, the trend 510 increase will be easily identifiable on the basis of data despite the fact that the accuracy of the computed values of the costs may be low.

In Fig. 7 presents an example of 600 graphics showing the measured pressure 602 at the reception and consumption 604 elektromagnitnogo pump, and a chart 606 calculated costs and average calculated consumption 608. Particularly, note on the chart 600, is that when the chart 606 calculated costs average filter moving average (forming 608), there is a high degree of freedom of conformity between the measured costs 604 elektromagnitnogo pump and average calculated consumption, 608, especially after calibration algorithm for several measurements 614 costs. It should be noted that after calibration algorithm measurements 614 costs becomes apparent high degree of conformity between the average calculated by the expenditure 608 and measured by the costs 604. This is the result of the fact that opened at the present time the method is an analytical model that is fair to all points in time, and is the way in which reflect transients caused by the flow of compressible fluids, for example, with high gas content. Therefore the area of validity extends beyond the calibration period, provided that the physical properties elektromagnitnogo pump in General remain the same.

1. The way to determine the flow through elektromagnitnoi pump (APN), the method contains the time that: bring electricity to electropherogram pump with land distribution device; take the processor pressure on the reception from the first gauge at the bottom the wellbore relatively elektromagnitnogo pump and pressure at the exit from the second gauge; take the processor voltage and current; take the processor at least one static value; calculate CPU consumption through elektromagnitnoi pump, in accordance with which: calculate the ratio of the coefficient for consumption, introducing accept voltages and currents in the equation of balance of powers; get dimensionless consumption, introducing calculated the ratio of the coefficient for consumption in the static data, calculates the flow rate based on dimensionless flow; and form the diagram calculated costs.

2. Way under item 1, in which at least one static value is the type of the pump curve and the efficiency of the pump receive taken pump type; in which the curve of efficiency of the pump is used for the dimensionless flow.

3. Way under item 2, where land distribution is a device for control of rotation frequency, and the equation of balance of power is dimensionless.

4. Way under item 3, additionally contains: measurement of voltage, current and frequency from land-based distribution device; reception processor voltage, current and frequency with ground switchgear.

5. Way under item 1, additionally contains: modeling of the total consumption of the well; the calculation of unsteady flow collector as a function of the cross-sectional area between the tubing and the internal diameter of the casing above electropherogram pump.

6. Way under item 1, the calculated consumption is an uncalibrated consumption; additionally contain: reception processor previous flow measurement elektromagnitnogo pump; calculation of calibration or the ratio between non-calibrated flow and accept previous measurement; and the use calibration ratios to uncalibrated flow to obtain a calibrated flow.

7. Way under item 6, which previous flow measurement well get with the test separator or multiphase meter.

8. Way under item 6, additionally contains: monitor calibration ratios, with the calibration value associated with the coefficient of efficiency of the pump; and assessment of the wear of the pump based on changes calibration ratios.

9. Way under item 1, optionally containing building a simulation model of the reservoir on the basis of diagrams calculated values and the method of superposition.

10. Way under item 9, additionally contains a calculation pressure in the reservoir on the basis of simulation reservoir models.

11. System for monitoring of flow of fluid in the borehole, the system contains: elektromagnitnoi pump (APN), located in equipment for completion; the land distribution device is electrically connected with electropherogram pump, with ground switchgear provides electricity to actuate elektromagnitnogo pump; the pressure gauge on the receiving side, coupled with electropherogram pump, the pressure gauge on the side of reception measures the pressure in the intake below the barrel bore relatively elektromagnitnogo pump; the pressure gauge on the side output, coupled with electropherogram pump, the pressure gauge on the side of the exit measures the output pressure is higher in the wellbore relatively elektromagnitnogo pump; voltmeter connected to ground switchgear, with a voltmeter to measure the voltage of the electric motor; ammeter connected to ground switchgear, with ammeter measures the current motor speed sensor, which measures the frequency with land distribution device; and a processor that performs read by a computer program stored on read computer media that, when executed, causes the processor to take pressure measurements at the reception, the outlet pressure, voltage, current and frequency, the processor calculates the flow through elektromagnitnoi pump when entering values into the equation of balance of power, based on electropherogram the pump.

12. The system under item 11, in which terrestrial distribution device is a device of speed control; and read by the computer program additionally encourages the processor to calculate the ratio of the coefficient for consumption with using the equation of balance of power.

13. The system under item 12, which is read by the computer program additionally encourages the processor to get the dimensionless flow when entering a relationship efficiency of the consumption function, connecting the ratio of the coefficient for consumption with dimensionless flow.

15. The system under item 10, which is read by the computer program additionally encourages the processor to take static input data for input of the static input data in a lookup table to get the value of the characteristic elektromagnitnogo pump and to enter the value obtained characteristics in the equation of balance of power.

16. Machine-readable media, programmed read by a computer program that, when executed, the processor makes processor: periodically to take voltage, current and frequency; periodically to take the pressure at the intake and outlet pressure; calculate the ratio of the coefficient for consumption at input accept voltage, current, frequency, pressure on the intake and outlet pressure in obezatelino the equation of balance of powers; to get a dimensionless consumption by linking relations the coefficient for consumption with receiving characteristic of the pump; to calculate the flow rate based on dimensionless flow; to repeat the calculation of the expenditure admission of voltage, current, frequency, pressure or receiving pressure at the output; and to create a chart of all the calculated values correlated with consumption.

17. Machine-readable media under item 16, in which execution by the processor additionally encourages the processor to manage graphic display to view graphics charts calculated values; in which a graphic image is qualitative analysis of the trends of expense relating to flow through elektromagnitnoi pump (APN).

18. Machine-readable media under item 16, in which execution by the processor additionally encourages processor: take the measured value of the flow through elektromagnitnoi pump; calibrate the equation of balance of capacities in accordance with the received measured value; and calculate calibrated flow through elektromagnitnoi pump.

19. Machine-readable media under item 16, in which execution by the processor additionally encourages the processor to calibrate the equation of balance capacity of the calibration coefficient of the pump in the equation of balance of capacities on the basis accept the measured values of flow through elektromagnitnoi pump.

20. Machine-readable media under item 18, in which execution by the processor additionally encourages processor: to calculate the consumption of the wellbore as a function of the cross-sectional area over electropherogram pump and the depth of the pump; to simulate the total flow of the well; and to calculate flow from collector when entering consumption wellbore and calibrated flow in the model the total consumption wells.