CN114626113A - Dimensionless electric submersible pump working condition macroscopic control plate generation method and device - Google Patents
Dimensionless electric submersible pump working condition macroscopic control plate generation method and device Download PDFInfo
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Abstract
The invention discloses a dimensionless method and a device for generating a macroscopic control plate under the working condition of an electric submersible pump, wherein the method comprises the following steps: acquiring a pump suction inlet pressure value and a pump suction inlet fluid displacement value of the electric submersible pump; normalizing the pressure value of the pump suction inlet to obtain a pressure reasonableness index; carrying out normalization processing on the fluid displacement value of the pump suction inlet to obtain a displacement reasonableness index; generating a working condition macroscopic control chart of the electric submersible pump according to the pressure reasonableness index and the displacement reasonableness index obtained by normalization processing, wherein the pressure reasonableness index is a vertical coordinate; the displacement reasonableness index is the abscissa. The invention generates the macroscopic control chart of the working condition of the electric submersible pump by normalizing the pressure value of the pump suction inlet and the fluid displacement value of the pump suction inlet, has stronger universality and flexibility, and can intuitively evaluate the process level and the management level of the electric pump well of different oil reservoirs, different fluid properties, different development stages and different underground equipment of the whole oil field.
Description
Technical Field
The invention relates to the field of oil exploitation, in particular to a dimensionless method and a dimensionless device for generating a macroscopic control chart for the working condition of an electric submersible pump.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
An electric submersible centrifugal pump (electric submersible pump for short) is a multi-stage centrifugal pump working under the well, and is put into the well together with an oil pipe, and a ground power supply transmits electric energy to an underground submersible motor through a cable, so that the submersible motor drives the multi-stage centrifugal pump to rotate, and the electric energy is converted into mechanical energy, thereby lifting crude oil in the oil well to the ground.
The oil production mode of the electric submersible pump is the most widely applied artificial lifting mode in the petroleum industry. The working condition macroscopic control chart is a method widely applied in the petroleum industry for evaluating the working condition of an artificial lifting well and managing the oil field, and is an effective means for comprehensively analyzing and judging the integral artificial lifting process and production condition of the oil field. By utilizing the working condition macroscopic control chart, the problem wells and potential wells can be conveniently and rapidly found, a basis is provided for the adjustment of the production system of each single well, the management level of the artificial lifting well lifting equipment is effectively improved, the underground lifting equipment can be stably in a reasonable working condition state for a long time, the pump detection period is prolonged, and the well opening time rate is improved.
According to the traditional method for generating the macroscopic control chart of the working condition of the electric submersible pump, when pressure or relative pressure is used as a control index, a reasonable submergence condition can be met, but the influence of gas at a pumping inlet on the electric submersible pump is not considered. Because the sinking degree and the gas percentage at the pumping inlet are not related under different reservoir fluid conditions, the risk that the free gas percentage at the electric pump inlet of a reasonable working area exceeds the tolerance degree of an electric pump under the condition of adopting the same index upper limit exists. When the free gas percentage is used as a control index, the submergence degree may not meet the requirement of the electric pump.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a method for generating a dimensionless macroscopic control chart for working conditions of an electric submersible pump, which is used for solving the technical problems of poor universality and flexibility of the macroscopic control chart for the working conditions of the electric submersible pump generated in the prior art, and comprises the following steps: acquiring a pump suction inlet pressure value and a pump suction inlet fluid displacement value of the electric submersible pump; normalizing the pressure value of the pump suction inlet to obtain a pressure reasonableness index; carrying out normalization processing on the fluid displacement value of the pump suction inlet to obtain a displacement reasonableness index; generating a working condition macroscopic control chart of the electric submersible pump according to the pressure reasonableness index and the displacement reasonableness index obtained by normalization processing, wherein the pressure reasonableness index is a vertical coordinate; the displacement reasonableness index is the abscissa.
The embodiment of the invention also provides a dimensionless device for generating the macroscopic control chart for the working condition of the electric submersible pump, which is used for solving the technical problems of poor universality and flexibility of the macroscopic control chart for the working condition of the electric submersible pump generated in the prior art, and comprises the following steps: the pump suction inlet pressure value acquisition module is used for acquiring a pump suction inlet pressure value of the electric submersible pump; the pump suction inlet fluid displacement value acquisition module is used for acquiring a pump suction inlet fluid displacement value of the electric submersible pump; the pump suction inlet pressure value normalization module is used for performing normalization processing on the pump suction inlet pressure value to obtain a pressure reasonableness index; the pump suction inlet fluid displacement value normalization module is used for performing normalization processing on the pump suction inlet fluid displacement value to obtain a displacement reasonableness index; the working condition macroscopic control plate generation module is used for generating a working condition macroscopic control plate of the electric submersible pump according to the pressure reasonableness index and the displacement reasonableness index obtained by normalization processing, wherein the pressure reasonableness index is a vertical coordinate; the displacement reasonableness index is the abscissa.
The embodiment of the invention also provides computer equipment for solving the technical problems of poor universality and poor flexibility of the electrical submersible pump working condition macroscopic control plate generated in the prior art, the computer equipment comprises a memory, a processor and a computer program which is stored on the memory and can be operated on the processor, and the dimensionless electrical submersible pump working condition macroscopic control plate generation method is realized when the processor executes the computer program.
The embodiment of the invention also provides a computer readable storage medium for solving the technical problems of poor universality and poor flexibility of the electric submersible pump working condition macroscopic control plate generated in the prior art, and the computer readable storage medium stores a computer program for executing the dimensionless electric submersible pump working condition macroscopic control plate generating method.
In the embodiment of the invention, after the pressure value of the pump suction inlet of the electric submersible pump and the fluid displacement value of the pump suction inlet are obtained, the pressure value of the pump suction inlet is normalized to obtain the pressure reasonableness index, the fluid displacement value of the pump suction inlet is normalized to obtain the displacement reasonableness index, and then the pressure reasonableness index and the displacement reasonableness index obtained by normalization are utilized to generate the working condition macroscopic control chart of the electric submersible pump, wherein the ordinate of the working condition macroscopic control chart is the pressure reasonableness index after normalization treatment, and the abscissa is the displacement reasonableness index after normalization treatment And evaluating the technological level and the management level of the electric pump well of different underground equipment in different development stages.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a schematic diagram of a macro control chart of the working condition of an electric submersible pump provided in the prior art;
FIG. 2 is a schematic diagram of a macro-control chart of the working condition of an electric submersible pump provided in the prior art;
FIG. 3 is a flow chart of a method for generating a dimensionless macro control chart of the working condition of the electric submersible pump according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a process for calculating the discharge reasonableness and the pressure reasonableness of an electric pump according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a macro-control chart of the working condition of the electric submersible pump provided in the embodiment of the present invention;
fig. 6 is a schematic diagram of a device for generating a dimensionless macroscopic control image of the operating condition of the electric submersible pump according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
At present, in a standard SY/T5746 + 2009 electric submersible pump well dynamic control chart compiling and using method adopted in the petroleum industry, theories and methods for compiling electric submersible pump control charts are related and explained as follows:
selecting the maximum displacement efficiency eta of the electric submersible pump and the maximum bottom hole flowing pressure p of the oil well according to the relation between the average oil layer middle depth and the average lower pump depth of the oil field, the characteristic curve of the electric submersible pump, the physical property of crude oil and other related datawfDetermining the size of the block diagram, determining the name of a coordinate (the ordinate is the bottom hole flowing pressure, and the abscissa is the displacement efficiency), and marking the scale and unit of the coordinate, as shown in figure 1. The zone boundaries in fig. 1 are determined by the following method:
firstly, determining an upper limit a line of bottom hole flowing pressure-displacement efficiency:
and (3) taking the minimum value of the difference between the medium depth H of the oil field and the lower pump L in actual production, taking the minimum value of the rated displacement of the electric submersible pump, and using a formula (1) and a formula (2) to make an upper limit a line of the discharge pressure-displacement efficiency (in specific implementation, each oil field combines actual production data to correct and adjust corresponding coefficients in the formula, so as to determine the a line).
pwf＝τh(H-L)+ptwh+(τ0+ξ)L-TDH (1)
pwf＝τh(H-L)+ptwh+(τ0+ξ)L-M×τw(C-Aη2-Bη) (2)
Wherein xi is 1.35 × 10-8Q1.819；
Wherein p iswfExpressed as bottom hole flow pressure in megapascals (Mpa); tau ishThe gradient of the mixed liquid pressure from a pump suction inlet to the middle depth section of an oil layer is shown, and the unit is megapascals per meter (Mpa/m); h represents the depth of the middle part of the oil layer and is expressed in meters (m); l represents the lower pump depth in meters (m); p is a radical oftwhThe unit of the oil pressure is megapascal (Mpa); tau is0The unit of the pressure gradient of the oil pipe liquid column is megapascals per meter (Mpa/m); tau iswThe pressure gradient of water is expressed in megapascals per meter (Mpa/m); TDH represents the pump head (head) in Mega pascals (MPa); the unit of the liquid produced at the mouth of the electric submersible pump well is ton per day (t/d); xi represents the liquid flow pipe loss coefficient, and the unit is megapascal per meter (Mpa/m); m represents a discharge capacity-lift relation curve correction coefficient in an electric submersible pump characteristic curve (the characteristic curve of the electric submersible pump when leaving a factory is made by taking clear water as a medium, when the electric submersible pump is used for oil well production, the viscosity and gas of well fluid can influence the electric submersible pump, and therefore each oil field is corrected according to the actual production characteristic of the electric submersible pump), and the value of the correction coefficient is equal to the ratio of the actually measured average lift of the electric submersible pump well to the average theoretical lift under the same discharge capacity efficiency; A. b and C represent the regression coefficients, decimal, of the displacement efficiency-head curve. The regression is performed by deriving formula (3) from formula (1) and formula (2).
TDH＝M×τw(C-Aη2-Bη) (3)
Determining a lower limit b line of the bottom hole flowing pressure-displacement efficiency:
and (3) taking the maximum value of the difference between H and L in actual production, taking the maximum value of the rated displacement of the electric submersible pump, and using a formula (L) and a formula (2) to make a lower bound b line of the flow pressure-displacement efficiency (in specific implementation, each oil field is combined with actual production data to correct and adjust corresponding coefficients in the formula, so that the b line is determined).
Determination of a displacement efficiency lower limit c line:
the optimal displacement efficiency range of several main pump types in the oil field is analyzed and calculated according to the characteristic curve of the main electric submersible pump used in the oil field, the average optimal area is between eta 60% and eta 135% (each oil field can adjust the optimal displacement efficiency range according to the characteristic curve of the electric submersible pump and actual production data), a vertical line is made at the position of the lower limit eta of the optimal displacement range of the flow pressure-displacement efficiency, which is 60%, and the vertical line is used as the limit for dividing the reasonable area and the area with larger parameters and respectively intersects the lines a and b at the point A, B, and the line AB is the lower limit c line of the displacement efficiency of the control diagram.
Fourthly, determining a parameter deviation cell boundary d line:
and (3) making a vertical line at the position where the efficiency eta is 135%, intersecting the line at a point D, making a line D from the point D, intersecting the line b at a point c, and using the line D as a boundary for dividing a reasonable working condition area and a parameter deviation area. Each oil field can revise the d line according to the actual production data and the dynamic change rule, and the d line can be a curve, a straight line or a broken line and the like.
The normal is made for the following three reasons: firstly, according to the requirement of reasonable development boundary of oil field, the flow pressure of reasonable region, namely C point, is limited within 8.5MPa (each oil field can determine the reasonable flow pressure range of oil well of the oil field according to the dynamic research and calculation result of oil well flow man and extraction dynamic, thereby determining the upper limit value of flow pressure); secondly, according to the normal well distribution rule, the merging point density outside the normal is thinner than that inside the normal; and thirdly, the well points inside and outside the normal line change along the vertical normal line when the well points are displaced (the liquid supply capacity is changed).
Dividing the area:
the dynamic control chart of the electric submersible pump well is divided into the following five areas by the four lines a, b, c and d and the control chart frame line, wherein the areas are respectively as follows: i represents a reasonable working condition area; II represents a parameter larger region; III represents a parameter bias cell; IV denotes a data verification area; v represents a production abnormality region.
The method has the following disadvantages in practical application:
first, the c-line and the d-line are determined differently, which may cause a deviation in determining the operating condition. Especially, the determination of the d-line has no clear basis, which causes great uncertainty in actual work.
Secondly, from the range of the displacement efficiency, the average optimal area referenced on the standard is between 60% and 135%, and each oil field can be adjusted according to the actual condition of the electric pump; in fact, the suppliers of electric pumps now have the optimum range of displacement of the type of electric pump offered in the characteristic curve of the electric pump.
Therefore, if the real displacement of the electric pump or the corresponding displacement proportion is used as the coordinate of the reference system, the uniformity of the chart is poor, and the condition of the whole oil field cannot be reflected on one control chart.
Aiming at the problems, the prior art improves the method for generating the working condition macroscopic control picture of the electric pump well. The specific method comprises the following steps: providing a displacement reasonable degree (RLRR), taking the displacement reasonable degree as a control index for generating a macro control chart of the working condition of the electric pump well, wherein the calculation method comprises the following steps:
wherein Q isPintakeRepresents the volume flow at the suction inlet of the pump, in m3/d；QRminRepresents the recommended lower limit value of the displacement of the electric submersible pump at the current frequency and has the unit of m3/d；QRmaxRepresents the recommended upper limit value of the displacement of the electric submersible pump at the current frequency, and the unit is m3/d。
Thus, when drawing a working condition macro control plate, the data needs to be processed as follows:
the wellhead production is converted to the fluid flow at the pump intake by equation (5):
QPintake＝QLBo(1-fw)+QLfw+QgBg (5)
wherein Q isLRepresents the oil well fluid production under standard conditions and has the unit of m3/d；BoThe volume coefficient of the crude oil under the condition of the suction inlet pressure of the electric submersible pump is represented; f. ofwRepresenting the water content; qgRepresents the gas production under standard conditions in m3/d；BgThe volume factor of the produced gas under the condition of the pressure of the suction port of the electric submersible pump is shown.
According to the fact that the discharge capacity of the electric pump is in direct proportion to the frequency of the motor, converting the upper limit value and the lower limit value of the recommended discharge capacity in the characteristic curve of the electric pump into the discharge capacity corresponding to the frequency of the motor during production:
wherein Q isRRepresenting the production of the submersible pump at the rated frequency, in m3/d；fPRepresenting the motor frequency driving the electric submersible pump during production; f. ofRThe nominal frequency of the submersible pump, i.e., the frequency to which the supplier-supplied submersible pump characteristic curve corresponds, is typically 50HZ or 60 HZ.
It is clear that this is a normalization process, which is reasonable when the RLRR is in the [0,1] range; when the RLRR is larger than 1, the current yield is larger than the recommended upper limit of the displacement under the current frequency, and the frequency is required to be adjusted upwards or the large pump needs to be replaced; when the RLRR is less than 0, the current production is less than the recommended lower displacement limit at the current frequency, and the frequency needs to be adjusted downwards or the small pump needs to be replaced. After the normalization processing of the displacement, the displacement indexes of the electric pumps in different displacement ranges are reflected in a working condition macro control chart, and the comparison is easier.
In the method for generating the working condition macroscopic control diagram of the electric submersible pump, a pressure index is generally adopted for another control index. Considering that the pressure index in the standard has many defects, especially for reservoirs with poor plane mean or reservoirs with different burial depths in the same block, the situation of a single well is described by averaging a large amount of data, and obviously, a large error exists. The scholars eliminate the influence of different well depths by introducing the concept of 'relative flow pressure', but the limit of control is difficult to be calibrated by the same scale due to the different oil properties of different oil reservoirs (for example, fig. 2 shows a macroscopic control chart for the working condition of the electric submersible pump obtained by adopting the reasonable degree of displacement and the relative flow pressure as control indexes). Considering the influence of gas on the operation of the electric pump, it has also been proposed to use the percentage of free gas at the suction inlet of the electric submersible pump as a control index.
In fact, the macro control chart of the working condition of the electric submersible pump adopting the free gas percentage as a control index is also an expression form of taking the pressure as the control index:
wherein, FglRepresenting the percentage of free gas at the suction inlet of the electrical submersible pump; r isgoRepresenting the production gas-liquid ratio; rspintakeExpressing the dissolved gas-oil ratio under the pressure condition at the pumping inlet of the electric submersible pump; b isgspintakeRepresenting the gas volume coefficient under the pressure condition at the pumping inlet of the electric submersible pump; b isopintakeRepresenting the oil volume coefficient under the pressure condition at the pumping inlet of the electric submersible pump; b iswpintakeThe water volume coefficient of the pressure condition at the pumping inlet of the electric submersible pump is expressed and can be 1.
Visible, except ground readable data fwAnd RgoIn addition, the remaining data is a function of the pressure at the suction of the electrical submersible pump. The existing macroscopic control chart for the working condition of the electric submersible pump directly converts the pressure condition into the percentage condition of free gas according to the relational expression.
The adoption of the index mainly considers that the common electric pump and the rotary separator are difficult to process the fluid with the free gas percentage of more than 25 percent, when the free gas percentage is less than 10 percent, the oil well is considered to have certain liquid extracting potential, and when the free gas percentage is between 10 percent and 25 percent, the electric pump is considered to be in a reasonable working condition area. However, with the development of the technology, the tolerance of the electric pumps produced by various manufacturers to gas is greatly changed, the treatment capacity of the separator is also greatly improved, and a very important problem is that the separation efficiency of the separator is different under the same flow rate; under different flow rates, the separation efficiency of the separator is different, so that the influence of the gas separator (gas processor) on the electric pump cannot be reflected by simply taking the free gas percentage before one separator, and the working condition of the electric pump cannot be truly reflected.
In order to apply the macroscopic control plate for the working condition of the electric submersible pump to the production well of the electric submersible pump with different production stages and fluid properties, the embodiment of the invention provides a method for generating the macroscopic control plate for the working condition of the electric submersible pump without dimensions.
Fig. 3 is a flowchart of a method for generating a dimensionless macro control map of the operation condition of the submersible pump according to an embodiment of the present invention, and as shown in fig. 3, the method includes the following steps:
s301, acquiring a pump inlet pressure value and a pump inlet fluid displacement value of the electric submersible pump.
In the specific implementation, the pressure value and the fluid discharge value at the pumping inlet of the electric submersible pump can be collected so as to display all the electric pump working condition conditions of different gas separator or gas processor processing capacities, different submergence degrees, different fluid properties and the like on a macroscopic control chart of the electric submersible pump working condition.
S302a, normalizing the pressure value of the pump suction inlet to obtain a pressure reasonableness index.
It should be noted that, in the conventional method using pressure or relative pressure as a control index, when the pressure or relative pressure meets the condition, i.e. a reasonable submergence condition is maintained, the influence of gas at the pumping inlet on the electric pump is not considered. That is, under different reservoir fluid conditions, there is no correlation between the submergence and the gas percentage at the pumping inlet, and there is a risk that the free gas percentage at the electric pump inlet of the reasonable working area exceeds the tolerance level of the electric pump under the condition of adopting the same index upper limit. When the free gas percentage is adopted, the submergence degree may not meet the requirement of the electric pump. In this case, a normalized Pressure reasonableness index rpr (consolidated Pressure ratio) is proposed, which allows to consider both the influence of the submergence and the gas percentage on the electric pump.
Thus, in an embodiment, as shown in fig. 4, in the method for generating the macro control chart of the operating condition of the electric submersible pump according to the embodiment of the present invention, the pressure value of the pump suction port may be normalized according to the following formula:
wherein RPR represents a pressure reasonableness index; pPintakeRepresenting a pump suction pressure value; p isminRepresents a minimum pump suction pressure value; pmaxRepresenting the maximum pump suction pressure value.
In specific implementation, the lower limit P of the pressure of the pump suction inlet can be calculated according to the production well yield data, the pressure data of the submersible electric pump suction inlet provided by the electric pump control cabinet, the gas tolerance index of the electric pump provided by a manufacturer, and the free gas percentage of a gas separator or a gas processor under the current yieldmin1. Referring to the currently commonly used gas processor, the current percentage of free gas is 10% as the upper pressure limit P of the corresponding pump suction inletmax1。
The method for determining the relative flow pressure boundary of the reasonable working condition area, which is widely applied at present, comprises the following steps: taking the working fluid level as the highest, calculating the relative flow pressure in the displacement limit of the normal zone as the upper boundary P of the relative flow pressure of the reasonable working condition zonemax2(ii) a Taking the lowest working fluid level in the displacement limit of the normal zone to calculate the relative flow pressure as the lower boundary P of the relative flow pressure of the reasonable working condition zonemin2。
In the embodiment of the invention, the separation efficiency of the gas separator is considered to influence the pressure of the suction port of the pump, so that the embodiment of the inventionProviding a free gas percentage calculation formula considering the efficiency y% of the gas separator, and back calculating the upper boundary P of the relative flow pressure of the reasonable working condition areamax2And the lower boundary line Pmin2：
Wherein, FglPThe percent free gas considering the pump suction pressure; rgoRepresenting the production gas-liquid ratio; rspintakeRepresenting the dissolved gas-oil ratio under the pressure condition at the pumping inlet of the electric submersible pump; b isgspintakeExpressing the volume coefficient of the gas under the pressure condition at the pumping inlet of the electric submersible pump; b isopintakeRepresenting the oil volume coefficient under the pressure condition at the pumping inlet of the electric submersible pump; bwpintakeThe water volume coefficient of the pressure condition at the pumping inlet of the electric submersible pump is expressed and can be 1.
In one embodiment, the method for generating the macroscopic control chart of the working condition of the electric submersible pump provided in the embodiment of the present invention determines the maximum pump suction pressure value and the minimum pump suction pressure value by the following formulas:
Pmax＝max(Pmax1,Pmax2) (10)
Pmin＝min(Pmin1,Pmin2) (11)
wherein, Pmax1An upper limit value representing a pump suction port pressure; pmax2Representing the upper limit value of the relative flow pressure of the working condition reasonable area; pmin1A lower limit value representing a pump suction port pressure; pmin2And the lower limit value of the relative flow pressure of the reasonable working condition area is shown. max (P)max1,Pmax2) Indicates taking Pmax1And Pmax2The larger value of (A), (B), min (P)min1,Pmin2) Indicates taking Pmin1And Pmin2The smaller value of (a). Will PmaxAnd PminAnd after normalization processing, obtaining the upper limit and the lower limit of the pressure control parameter.
S302b, the fluid displacement value of the pump suction inlet is normalized to obtain a displacement reasonableness index.
In specific implementation, the fluid displacement value of the pump suction inlet can be normalized through the formula (4) to obtain a displacement reasonableness index, which is not described herein again.
As shown in fig. 4, in order to more accurately determine the displacement reasonableness index at different frequencies, the displacement reasonableness index may be calculated by the following formula:
wherein the content of the first and second substances,
Qopintake＝Qo×Bop (15)
Qgpintake＝Qg×Bgp (16)
Qwpintake＝Qw×Bwp (17)
wherein RLRR represents a displacement reasonableness index; qopintakeRepresents the surface oil phase volume or production; qgpintakeRepresents the surface gas phase volume or production; qwpintakeRepresenting the surface water phase volume or production; qfmaxRepresenting the maximum value of the displacement under the current frequency; qfminRepresenting the minimum value of the displacement under the current frequency; f represents the current frequency of the electric pump; f. ofRRepresenting the rated frequency of the electric pump;
represents the maximum displacement at the rated frequency;
indicating the displacement minimum at the nominal frequency.
S303, generating a working condition macroscopic control plate of the electric submersible pump according to the pressure reasonableness index and the displacement reasonableness index obtained by normalization, wherein the pressure reasonableness index is a vertical coordinate; the displacement reasonableness index is the abscissa.
Therefore, the method for generating the electrical submersible pump working condition macroscopic control chart provided by the embodiment of the invention utilizes the normalized pressure reasonableness as the control factor of the electrical submersible pump working condition macroscopic control chart, and can display the electrical submersible pump working conditions with different gas separator or gas processor processing capacities, different submergence degrees and different fluid properties on the same chart, so that the generated electrical submersible pump working condition macroscopic control chart has universality, and can more intuitively evaluate the process level and the management level of the electrical pump well of different oil reservoirs, different fluid properties, different development stages and different underground equipment in the whole oil field.
In one embodiment, the method for generating the macro control plate for the operating condition of the electrical submersible pump provided in the embodiment of the present invention may further include the following steps: monitoring whether the frequency of an electric pump of the electric submersible pump changes; when the frequency of an electric pump of the electric submersible pump changes, the fluid displacement value of a pump inlet of the electric submersible pump is obtained again; normalizing the fluid displacement value of the pump suction inlet obtained again to obtain an updated displacement reasonableness index; and generating a working condition macroscopic control chart of the electric submersible pump according to the pressure reasonableness index and the updated displacement reasonableness index.
Through the embodiment, the scientificity of the working condition macroscopic control chart of the electric submersible pump can be improved by increasing the control parameter change conditions of the discharge capacity and the pressure under the condition of frequency conversion, the separation efficiency of the gas separator or the gas processor under the conditions of different flow rates and different free gas percentages, considering the personalized treatment of the electric pump on the tolerance degree of the gas and the like.
Fig. 5 is a schematic diagram of a macro-control chart of the working condition of the electric submersible pump provided in the embodiment of the present invention, and as shown in fig. 5, according to the macro-control chart of the working condition of the electric submersible pump generated in the embodiment of the present invention, the working conditions of all electric pumps in different fluid characteristics and development stages of the whole oil field can be reflected by one chart, and the macro-control chart of the working condition has universality and can more clearly reflect the real condition of the electric pump and the process level and the management level of the electric pump in the whole area.
Based on the same inventive concept, the embodiment of the invention also provides a dimensionless device for generating the macroscopic control image of the working condition of the electric submersible pump, which is described in the following embodiment. The principle of the device for solving the problems is similar to the method for generating the dimensionless electrical submersible pump working condition macroscopic control chart, so the implementation of the device can refer to the implementation of the dimensionless electrical submersible pump working condition macroscopic control chart generation method, and repeated parts are not described again.
Fig. 6 is a schematic diagram of a device for generating a dimensionless macroscopic control map of the operation condition of the electric submersible pump according to an embodiment of the present invention, as shown in fig. 6, the device includes: the device comprises a pump inlet pressure value acquisition module 61, a pump inlet fluid displacement value acquisition module 62, a pump inlet pressure value normalization module 63, a pump inlet fluid displacement value normalization module 64 and a working condition macro control image generation module 65.
The pump suction inlet pressure value acquisition module 61 is used for acquiring a pump suction inlet pressure value of the electric submersible pump; a pump inlet fluid displacement value obtaining module 62, configured to obtain a pump inlet fluid displacement value of the electrical submersible pump; a pump suction inlet pressure value normalization module 63, configured to perform normalization processing on the pump suction inlet pressure value to obtain a pressure reasonableness index; a pump inlet fluid displacement value normalization module 64, configured to perform normalization processing on the pump inlet fluid displacement value to obtain a displacement reasonableness index; the working condition macroscopic control chart generation module 65 is used for generating a working condition macroscopic control chart of the electric submersible pump according to the pressure reasonableness index and the displacement reasonableness index obtained by normalization processing, wherein the pressure reasonableness index is a vertical coordinate; the displacement reasonableness index is the abscissa.
In one embodiment, the apparatus for generating a macroscopic control map of the operation condition of the electric submersible pump provided in the embodiment of the present invention further includes: and an electrical submersible pump frequency monitoring module 66 for monitoring whether the electrical pump frequency of the electrical submersible pump changes. In this embodiment, the operating condition macro control image generating module 65 is further configured to obtain a fluid displacement value of a pump inlet of the electrical submersible pump again when the frequency of the electrical pump of the electrical submersible pump changes; normalizing the fluid displacement value of the pump suction inlet obtained again to obtain an updated displacement reasonableness index; and generating a working condition macroscopic control chart of the electric submersible pump according to the pressure reasonableness index and the updated displacement reasonableness index.
In an embodiment of the present invention, in the device for generating a macro control map of the operating condition of the electrical submersible pump, the pump suction port pressure value normalization module 63 is further configured to normalize the pump suction port pressure value according to the above equation (8).
In one embodiment, in the apparatus for generating a macro control map of the operating condition of the electrical submersible pump according to an embodiment of the present invention, the pump suction port pressure value normalization module 63 is further configured to determine the maximum pump suction port pressure value and the minimum pump suction port pressure value according to the above equation (9) and equation (10).
In an embodiment, in the device for generating the macro control chart for the working condition of the electric submersible pump according to the embodiment of the present invention, the pump inlet fluid displacement value normalization module 64 is configured to normalize the pump inlet fluid displacement value according to the above formula (4) to obtain a displacement reasonableness index, which is not described herein again.
Based on the same inventive concept, the embodiment of the invention also provides a computer device, which is used for solving the technical problems of poor universality and poor flexibility of the electrical submersible pump working condition macro control plate generated in the prior art.
Based on the same inventive concept, the embodiment of the invention also provides a computer readable storage medium, which is used for solving the technical problems of poor universality and poor flexibility of the electrical submersible pump working condition macroscopic control plate generated in the prior art, and the computer readable storage medium stores a computer program for executing the method for generating the dimensionless electrical submersible pump working condition macroscopic control plate.
To sum up, the embodiments of the present invention provide a method, an apparatus, a computer device, and a computer readable storage medium for generating a dimensionless macro control map of the operating condition of an electrical submersible pump, after obtaining a pressure value of a pump inlet of the electrical submersible pump and a fluid displacement value of the pump inlet, performing normalization processing on the pressure value of the pump inlet to obtain a pressure reasonableness index, and performing normalization processing on the fluid displacement value of the pump inlet to obtain a displacement reasonableness index, and further generating a macro control map of the operating condition of the electrical submersible pump by using the pressure reasonableness index and the displacement reasonableness index obtained by the normalization processing, where the ordinate of the macro control map of the operating condition is the pressure reasonableness index after the normalization processing, and the abscissa is the displacement reasonableness index after the normalization processing, compared with the macro control map of the operating condition of the electrical submersible pump generated in the prior art, the macro control map of the operating condition of the electrical submersible pump generated in the embodiments of the present invention, the method has stronger universality and flexibility, and can intuitively evaluate the process level and the management level of the electric pump well of different oil reservoirs, different fluid properties, different development stages and different underground equipment in the whole oil field.
According to the method for generating the working condition macro control chart of the electric submersible pump, provided by the embodiment of the invention, the pressure reasonableness index RPR is provided through normalization processing, the applicability problem of the working condition macro chart under various conditions such as free gas percentage at a pumping inlet, processing capacity of a gas separator or a gas processor, submergence, different fluid properties and the like is comprehensively considered, and the process level and the management level of the electric submersible pump in the whole oil field can be reflected on one chart. Compared with the prior art, the method has the following outstanding advantages:
firstly, by normalization processing, absolute indexes are weakened, the level of the electric pump of the whole oil field is reflected on one chart, and the characteristics and the actual working condition of the single-well electric pump can be truly and objectively reflected;
through normalization processing, two factors of the submergence degree of the electric pump and the free gas percentage of the inlet of the electric pump are comprehensively considered, so that the flexibility of the working condition macroscopic control chart is improved on the basis of pertinence;
and recalculation of reasonable displacement after frequency conversion is added, and the separation efficiency of the gas separator or the gas processor under different flow rates and different free gas percentage conditions is considered, so that the chart is more scientific.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A dimensionless electric submersible pump working condition macro control image generation method is characterized by comprising the following steps:
acquiring a pump suction inlet pressure value and a pump suction inlet fluid displacement value of the electric submersible pump;
normalizing the pressure value of the pump suction inlet to obtain a pressure reasonableness index; carrying out normalization processing on the fluid displacement value of the pump suction inlet to obtain a displacement reasonableness index;
generating a working condition macroscopic control chart of the electric submersible pump according to a pressure reasonableness index and a displacement reasonableness index obtained by normalization processing, wherein the pressure reasonableness index is a vertical coordinate; the displacement reasonableness index is the abscissa.
2. The method of claim 1, wherein the method further comprises:
monitoring whether the frequency of an electric pump of the electric submersible pump changes;
when the frequency of an electric pump of the electric submersible pump changes, the fluid displacement value of a pump inlet of the electric submersible pump is obtained again;
normalizing the fluid displacement value of the pump suction inlet obtained again to obtain an updated displacement reasonableness index;
and generating a working condition macroscopic control chart of the electric submersible pump according to the pressure reasonableness index and the updated displacement reasonableness index.
3. The method of claim 1, wherein the pump suction pressure value is normalized by the following equation:
wherein RPR represents a pressure reasonableness index; p isPintakeRepresenting a pump suction pressure value; pminRepresents a minimum pump suction pressure value; pmaxRepresenting the maximum pump suction pressure value.
4. The method of claim 3, wherein the maximum pump suction pressure value and the minimum pump suction pressure value are determined by the following equations:
Pmax＝max(Pmax1,Pmax2)；
Pmin＝min(Pmin1,Pmin2)；
wherein, Pmax1An upper limit value representing a pump suction port pressure; pmax2Representing the upper limit value of the relative flow pressure of the working condition reasonable area; pmin1A lower limit value representing a pump suction port pressure; pmin2And the lower limit value of the relative flow pressure of the reasonable working condition area is shown.
5. A dimensionless device for generating a macroscopic control picture of the working condition of an electric submersible pump is characterized by comprising:
the pump suction inlet pressure value acquisition module is used for acquiring a pump suction inlet pressure value of the electric submersible pump;
the pump suction inlet fluid displacement value acquisition module is used for acquiring a pump suction inlet fluid displacement value of the electric submersible pump;
the pump suction inlet pressure value normalization module is used for performing normalization processing on the pump suction inlet pressure value to obtain a pressure reasonableness index;
the pump suction inlet fluid displacement value normalization module is used for performing normalization processing on the pump suction inlet fluid displacement value to obtain a displacement reasonableness index;
the working condition macroscopic control plate generating module is used for generating a working condition macroscopic control plate of the electric submersible pump according to the pressure reasonableness index and the displacement reasonableness index obtained by normalization processing, wherein the pressure reasonableness index is a vertical coordinate; the displacement reasonableness index is the abscissa.
6. The apparatus of claim 5, wherein the apparatus further comprises:
the electric submersible pump frequency monitoring module is used for monitoring whether the electric pump frequency of the electric submersible pump changes;
the working condition macroscopic control image generating module is also used for acquiring the fluid displacement value of a pump inlet of the electric submersible pump again under the condition that the frequency of an electric pump of the electric submersible pump changes; normalizing the fluid displacement value of the pump suction inlet obtained again to obtain an updated displacement reasonableness index; and generating a working condition macroscopic control chart of the electric submersible pump according to the pressure reasonableness index and the updated displacement reasonableness index.
7. The apparatus of claim 5, wherein the pump inlet pressure value normalization module is further configured to normalize the pump inlet pressure value by:
wherein RPR represents a pressure reasonableness index; pPintakeRepresenting a pump suction pressure value; pminRepresents a minimum pump suction pressure value; pmaxRepresenting the maximum pump suction pressure value.
8. The apparatus of claim 7, wherein the pump suction pressure value normalization module is further configured to determine a maximum pump suction pressure value and a minimum pump suction pressure value by:
Pmax＝max(Pmax1,Pmax2)；
Pmin＝min(Pmin1,Pmin2)；
wherein, Pmax1An upper limit value representing a pump suction port pressure; p ismax2Representing the upper limit value of the relative flow pressure of the working condition reasonable area; p ismin1A lower limit value representing a pump suction port pressure; pmin2And the lower limit value of the relative flow pressure of the reasonable working condition area is shown.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of generating a dimensionless map of electrical submersible pump operation according to any of claims 1 to 4 when executing the computer program.
10. A computer-readable storage medium storing a computer program for executing the method for generating a dimensionless macro control map of an electrical submersible pump operation according to any one of claims 1 to 4.
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