CN115510370B - Method for calculating oil well liquid production capacity based on ground indicator diagram - Google Patents

Method for calculating oil well liquid production capacity based on ground indicator diagram Download PDF

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CN115510370B
CN115510370B CN202211456535.0A CN202211456535A CN115510370B CN 115510370 B CN115510370 B CN 115510370B CN 202211456535 A CN202211456535 A CN 202211456535A CN 115510370 B CN115510370 B CN 115510370B
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load difference
opening
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discharge valve
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CN115510370A (en
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张延海
胡勇军
于晓波
高立亮
刘冠宇
巩海波
李雪花
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Shandong Shengli Tonghai Group Dongying Tianlan Energy Saving Technology Co ltd
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Abstract

The invention discloses a method for calculating oil well liquid production capacity based on a ground indicator diagram, which relates to the technical field of oil well liquid production capacity calculation, and comprises the following steps: s1: determining the opening point of the pump suction valve in the indicator diagram by the quadrilateral vector method
Figure 587097DEST_PATH_IMAGE001
Closing point of
Figure 529645DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 357793DEST_PATH_IMAGE003
Closing point of
Figure 981672DEST_PATH_IMAGE004
And S2: opening point of suction valve
Figure 985400DEST_PATH_IMAGE001
Closing point of
Figure 223483DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 679873DEST_PATH_IMAGE003
Closing point of
Figure 107443DEST_PATH_IMAGE004
And (6) correcting. The invention determines the opening point and the closing point of the suction valve and the discharge valve of the pump by a quadrilateral vector method, and then carries out secondary correction on the opening point and the closing point of the suction valve and the discharge valve, thereby improving the calculation precision of the later-stage liquid production amount, and calculating the liquid production amount according to the corrected indicator diagram, and solving the problem that the liquid production amount of the oil well is difficult to be continuously and accurately measured.

Description

Method for calculating oil well liquid production capacity based on ground indicator diagram
Technical Field
The invention relates to the technical field of oil well liquid production quantity calculation, in particular to a method for calculating oil well liquid production quantity based on a ground indicator diagram.
Background
The rod pump oil extraction of the pumping well is a main mechanical oil extraction mode in China, the change rule of the liquid yield of the oil well is the evaluation of the production state of the oil well and the change analysis of the condition of an oil storage layer, and an important basis is made according to an oil field development scheme and plays an important role in the oil field development.
At present, a load and displacement sensor is basically installed in an oil well, the ground indicator diagram is acquired and transmitted every 30 minutes, and the liquid production amount is calculated in real time.
The prior art has the following defects: however, in practical application, the problems that the indicator diagram is inaccurate in calculating the liquid production amount and has large errors exist, so that the working personnel cannot accurately calculate the liquid production amount of the oil well of the pumping well.
Therefore, it is necessary to provide a method for calculating the oil well fluid production based on a ground indicator diagram, so as to realize real-time, continuous and accurate measurement of the oil well fluid production.
Disclosure of Invention
The invention aims to provide a method for calculating the liquid production capacity of an oil well based on a ground indicator diagram so as to solve the defects in the background technology.
In order to achieve the above purpose, the invention provides the following technical scheme: a method of calculating oil well fluid production based on a surface indicator diagram, the method comprising the steps of:
S1：determining the opening point of the pump suction valve in the indicator diagram by a quadrilateral vector method
Figure 318112DEST_PATH_IMAGE001
Closing point
Figure 907356DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 483831DEST_PATH_IMAGE003
Closing point
Figure 800411DEST_PATH_IMAGE004
；
S2: opening point of suction valve
Figure 286888DEST_PATH_IMAGE001
Point of closure
Figure 640509DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 94492DEST_PATH_IMAGE003
Point of closure
Figure 965497DEST_PATH_IMAGE004
Making a correction to determine the opening point of the suction valve
Figure 555747DEST_PATH_IMAGE005
Point of closure
Figure 221214DEST_PATH_IMAGE006
Opening point of discharge valve
Figure 772281DEST_PATH_IMAGE007
Point of closure
Figure 702103DEST_PATH_IMAGE008
Obtaining a corrected indicator diagram;
s3: calculating the liquid production amount according to the corrected indicator diagram;
in step S1: determination of the opening point of a pump intake valve by means of a quadrilateral vectoring method
Figure 897592DEST_PATH_IMAGE001
Point of closure
Figure 248808DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 428117DEST_PATH_IMAGE003
Point of closure
Figure 234399DEST_PATH_IMAGE004
The method comprises the following steps:
s1.1: determining the minimum displacement point and the maximum displacement point, connecting the minimum displacement point and the maximum displacement point, and calculating the slope of the connecting line;
s1.2: translating the connecting line to find two tangent points, and defining the tangent points as
Figure 110826DEST_PATH_IMAGE009
Points, the lower tangent point being defined as
Figure 367364DEST_PATH_IMAGE010
Point;
s1.3: will be provided with
Figure 768389DEST_PATH_IMAGE011
Connecting the points into a straight line, calculating
Figure 643941DEST_PATH_IMAGE011
The slope of the connecting line;
s1.4: will be provided with
Figure 63290DEST_PATH_IMAGE011
Link translation rework
Figure 507041DEST_PATH_IMAGE012
Point and final determination
Figure 373191DEST_PATH_IMAGE013
Point;
s1.5: will be provided with
Figure 52434DEST_PATH_IMAGE013
Connecting the points into a straight line, calculating
Figure 77022DEST_PATH_IMAGE013
The slope of the connecting line;
s1.6: will be provided with
Figure 675363DEST_PATH_IMAGE013
Link translation rework
Figure 50980DEST_PATH_IMAGE011
Point, finally determined as
Figure 268335DEST_PATH_IMAGE014
Point;
s1.7: finally determining the opening point of the suction valve
Figure 662276DEST_PATH_IMAGE001
Point of closure
Figure 447830DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 294432DEST_PATH_IMAGE003
Point of closure
Figure 49898DEST_PATH_IMAGE004
；
In step S1.3 and step S1.5,
Figure 783499DEST_PATH_IMAGE011
the slope of the connecting line,
Figure 989221DEST_PATH_IMAGE013
The slope calculation formula of the connecting line is as follows:
Figure 198486DEST_PATH_IMAGE015
wherein, M represents the slope of the light,
Figure 633009DEST_PATH_IMAGE016
in order to be the maximum value of the load,
Figure 735963DEST_PATH_IMAGE017
in order to be the minimum value of the load,
Figure 722374DEST_PATH_IMAGE018
for the maximum value of the displacement to be,
Figure 294301DEST_PATH_IMAGE019
is the minimum value of displacement;
in step S2, the opening point of the suction valve is set
Figure 781783DEST_PATH_IMAGE001
Point of closure
Figure 755555DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 912867DEST_PATH_IMAGE003
Point of closure
Figure 955778DEST_PATH_IMAGE004
The correction comprises the following steps:
S2.1：
Figure 997683DEST_PATH_IMAGE001
the point is at the down stroke, moves backwards to the first point of the up stroke, and calculates
Figure 685017DEST_PATH_IMAGE001
The primary load difference of the points is larger than 0.05KN, 10 points are pushed back from the first point, the primary load difference and the secondary load difference of each point are calculated, the primary load difference of each point is larger than or equal to 0, and the point with the minimum secondary load difference is a new point
Figure 409302DEST_PATH_IMAGE005
Point, otherwise, it is as original
Figure 690242DEST_PATH_IMAGE001
Point;
in step S2, the opening point of the suction valve is set
Figure 785106DEST_PATH_IMAGE001
Point of closure
Figure 733470DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 888377DEST_PATH_IMAGE003
Point of closure
Figure 515667DEST_PATH_IMAGE004
The correction further comprises the following steps:
S2.2：
Figure 899375DEST_PATH_IMAGE002
the point is at the down stroke, and the point is moved forward to the last point of the up stroke, and the calculation is carried out
Figure 685934DEST_PATH_IMAGE002
The first load difference of the points is less than-0.06 KN, 15 points are pushed forward from the last point, the first load difference and the second load difference of each point are calculated, the first load difference of each point is less than 0, and the point with the minimum second load difference is a new point
Figure 621529DEST_PATH_IMAGE006
Point, otherwise, it is as original
Figure 877061DEST_PATH_IMAGE002
Point;
in step S3, the liquid production amount is calculated according to the corrected indicator diagram, and the calculation formula is as follows:
Figure 48149DEST_PATH_IMAGE020
in the formula (I), the compound is shown in the specification,
Figure 705526DEST_PATH_IMAGE021
expressed as the amount of fluid produced,
Figure 812022DEST_PATH_IMAGE022
as indicated by the time of day,
Figure 804118DEST_PATH_IMAGE023
as indicated by the effective stroke, the stroke,
Figure 529629DEST_PATH_IMAGE024
indicated as a number of strokes in a stroke,
Figure 900567DEST_PATH_IMAGE025
expressed as the cross-sectional area of the pump,
Figure 302598DEST_PATH_IMAGE026
expressed as the density of the produced fluid,
Figure 532723DEST_PATH_IMAGE027
expressed as the fluid production volume factor.
Preferably, in step S2, the opening point of the suction valve is adjusted
Figure 311192DEST_PATH_IMAGE001
Point of closure
Figure 536637DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 860302DEST_PATH_IMAGE003
Closing point
Figure 110147DEST_PATH_IMAGE004
The correction further comprises the following steps:
S2.3：
Figure 911881DEST_PATH_IMAGE003
on the upstroke, moving back to the first point of the downstroke, calculate
Figure 257411DEST_PATH_IMAGE003
The primary load difference of the points is less than-0.05 KN, 12 points are pushed back from the first point, the primary load difference and the secondary load difference of each point are calculated, the primary load difference of each point is less than 0, and the point with the maximum secondary load difference is
Figure 266825DEST_PATH_IMAGE007
Point, otherwise, it is as original
Figure 205962DEST_PATH_IMAGE003
And (4) point.
Preferably, in step S2, the opening point of the suction valve is set
Figure 326233DEST_PATH_IMAGE001
Point of closure
Figure 260691DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 457317DEST_PATH_IMAGE003
Point of closure
Figure 133018DEST_PATH_IMAGE004
The correction further comprises the following steps:
S2.4：
Figure 542134DEST_PATH_IMAGE004
the point is at the upper stroke, and the point is moved forward to the last point of the lower stroke, and the calculation is carried out
Figure 596678DEST_PATH_IMAGE004
The first load difference of the points is more than 0.1KN, and calculation is carried out
Figure 947894DEST_PATH_IMAGE028
One for each point in the segmentThe secondary load difference is greater than 0.1KN and the displacement is minimum, and the point is new
Figure 596044DEST_PATH_IMAGE008
Point, otherwise, it is as original
Figure 933484DEST_PATH_IMAGE004
Point;
wherein p (c) is the opening point of the discharge valve
Figure 498326DEST_PATH_IMAGE010
P (d) is the discharge valve closing point
Figure 505597DEST_PATH_IMAGE004
Is used to determine the index of (1).
Preferably, the indicator diagram is composed of 200 points, each point has a load difference, and a primary load difference calculation formula is as follows:
Figure 765677DEST_PATH_IMAGE029
in the formula (I), the compound is shown in the specification,
Figure 765863DEST_PATH_IMAGE030
in order to obtain a first time load difference,
Figure 935944DEST_PATH_IMAGE031
in order to be the load at the present point,
Figure 363383DEST_PATH_IMAGE032
the load at the previous point;
the secondary load difference calculation formula is as follows:
Figure 376339DEST_PATH_IMAGE033
in the formula (I), the compound is shown in the specification,
Figure 930948DEST_PATH_IMAGE034
in order to obtain the secondary load difference,
Figure 210663DEST_PATH_IMAGE035
the load difference at the latter point.
Preferably, the first and second liquid crystal materials are,
Figure 825315DEST_PATH_IMAGE022
expressed as time of day, converted to minutes, the formula is:
Figure 59987DEST_PATH_IMAGE036
the effective stroke is calculated according to the opening point and the closing point of the pump suction valve and the discharge valve, and the liquid production quantity per minute is calculated and multiplied by the minute number per day, so that the liquid production quantity per day is calculated.
In the technical scheme, the invention provides the following technical effects and advantages:
1. the invention determines the opening point and the closing point of the suction valve and the discharge valve of the pump by a quadrilateral vector method, and then carries out secondary correction on the opening point and the closing point of the suction valve and the discharge valve, thereby improving the calculation precision of the later-stage liquid production amount, and calculating the liquid production amount according to the corrected indicator diagram, and solving the problem that the liquid production amount of the oil well is difficult to continuously and accurately measure.
2. According to the invention, the closing points of the suction valve and the discharge valve are corrected and determined through the opening points of the suction valve and the discharge valve, the opening points of the suction valve and the discharge valve are corrected and determined through the closing points of the suction valve and the discharge valve, and the closing points of the opening points of the suction valve and the discharge valve are finally driven through a correction mode, so that a basis is provided for the calculation of the liquid production capacity in the later period.
3. According to the invention, the opening point closing points of the suction valve and the discharge valve are corrected for the second time, so that the finally determined opening point closing points of the suction valve and the discharge valve have small errors, and the calculation precision of the liquid yield is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a flow chart of the operation of the present invention;
FIG. 2 is a schematic diagram of a connection line between a minimum displacement point and a maximum displacement point in the indicator diagram according to the present invention;
FIG. 3 is a diagram illustrating the definition of the tangent points a and c in the indicator diagram according to the present invention;
FIG. 4 is a schematic diagram of ac connection lines in the indicator diagram of the present invention;
FIG. 5 is a diagram illustrating the definition of the b1 and d1 tangent points in the indicator diagram according to the present invention;
FIG. 6 is a schematic view of a connection line b1d1 in the indicator diagram according to the present invention;
FIG. 7 is a schematic diagram illustrating the determination of the tangent points a1 and c1 in the indicator diagram according to the present invention;
FIG. 8 is a schematic diagram illustrating the determination of tangent points a1, b1, c1, and d1 in an indicator diagram according to the present invention;
FIG. 9 is a schematic diagram illustrating a correction of a2 tangent point in an indicator diagram according to the present invention;
FIG. 10 is a diagram illustrating a correction of b2 tangent point in the indicator diagram according to the present invention;
FIG. 11 is a diagram illustrating a correction of c2 tangent points in an indicator diagram according to the present invention;
FIG. 12 is a diagram illustrating a correction of the d2 tangent point in the indicator diagram according to the present invention;
fig. 13 is a schematic diagram of the indicator diagram of the present invention after the correction of the determined a2, b2, c2, d2 tangent points.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Example 1
Referring to fig. 1, the method for calculating the fluid production of the oil well based on the ground indicator diagram according to the embodiment includes the following steps:
determination of the opening point of a pump intake valve by means of a quadrilateral vectoring method
Figure 401975DEST_PATH_IMAGE001
Point of closure
Figure 546649DEST_PATH_IMAGE002
(ii) a Opening point of discharge valve
Figure 315891DEST_PATH_IMAGE003
Closing point of
Figure 37859DEST_PATH_IMAGE004
Opening point of suction valve
Figure 934271DEST_PATH_IMAGE001
Point of closure
Figure 917139DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 998228DEST_PATH_IMAGE003
Closing point of
Figure 82858DEST_PATH_IMAGE004
Making a correction to determine the opening point of the suction valve
Figure 438753DEST_PATH_IMAGE005
Closing point of
Figure 541707DEST_PATH_IMAGE006
Opening point of discharge valve
Figure 856014DEST_PATH_IMAGE007
Closing point of
Figure 942788DEST_PATH_IMAGE037
And 2, calculating the liquid production according to the corrected indicator diagram, determining the opening point and the closing point of a suction valve and a discharge valve of the pump by a quadrilateral vector method, performing secondary correction on the opening point and the closing point of the suction valve and the discharge valve, improving the calculation precision of the liquid production in the later period, calculating the liquid production according to the corrected indicator diagram, and solving the problem that the liquid production of the oil well is difficult to continuously and accurately measure.
Quadrilateral vector method for determining opening point of pump suction valve
Figure 181002DEST_PATH_IMAGE001
Point of closure
Figure 132603DEST_PATH_IMAGE002
(ii) a Opening point of discharge valve
Figure 555494DEST_PATH_IMAGE003
Closing point of
Figure 349138DEST_PATH_IMAGE004
The method comprises the following steps:
referring to fig. 2, (1) determine the minimum displacement point and the maximum displacement point to be connected in parallel, and calculate the slope of the connection.
Referring to FIG. 3, (2) translate the line to find two tangent points, which are defined as the upper tangent points
Figure 374732DEST_PATH_IMAGE009
Points, the lower tangent point being defined as
Figure 327644DEST_PATH_IMAGE010
And (4) point.
Referring to FIG. 4, (3) will
Figure 796803DEST_PATH_IMAGE011
Connecting the points into a straight line, calculating
Figure 61431DEST_PATH_IMAGE011
The slope of the line.
Referring to FIG. 5, (4) will
Figure 31661DEST_PATH_IMAGE011
Link translation rework
Figure 714446DEST_PATH_IMAGE012
Point and final determination
Figure 603774DEST_PATH_IMAGE013
And (4) point.
Referring to FIG. 6, (5) will
Figure 231064DEST_PATH_IMAGE013
Connecting the points into a straight line, calculating
Figure 349193DEST_PATH_IMAGE013
The slope of the line.
Referring to FIG. 7, (6) will
Figure 401331DEST_PATH_IMAGE013
Link translation rework
Figure 71347DEST_PATH_IMAGE011
Point, finally determined as
Figure 326879DEST_PATH_IMAGE014
And (4) point.
Referring to FIG. 8, (7) Final determination of the opening point of the suction valve
Figure 232387DEST_PATH_IMAGE001
Closing point
Figure 14398DEST_PATH_IMAGE002
(ii) a Opening point of discharge valve
Figure 996261DEST_PATH_IMAGE003
Closing point of
Figure 722777DEST_PATH_IMAGE004
The method corrects and determines the closing points of the suction valve and the discharge valve through the opening points of the suction valve and the discharge valve, corrects and determines the opening points of the suction valve and the discharge valve through the closing points of the suction valve and the discharge valve, finally drives the closing points of the opening points of the suction valve and the discharge valve through a correction mode, and provides a basis for later-stage liquid production amount calculation.
The minimum displacement point and the maximum displacement point are determined as: the minimum displacement point is the first displacement 0 point, and as viewed in fig. 2, is the point corresponding to the minimum value of the abscissa, and the maximum displacement point is the point corresponding to the maximum value of the abscissa, as viewed in fig. 2.
Figure 572922DEST_PATH_IMAGE011
The slope of the connecting line,
Figure 84805DEST_PATH_IMAGE013
The slope calculation formula of the connecting line is as follows:
Figure 221258DEST_PATH_IMAGE038
wherein M represents the slope, the ordinate in the indicator diagram is the load, use
Figure 310436DEST_PATH_IMAGE039
To indicate that the user is not in a normal position,
Figure 839638DEST_PATH_IMAGE016
in order to be the maximum value of the load,
Figure 461155DEST_PATH_IMAGE017
is the minimum load value; the abscissa is displacement, using
Figure 643875DEST_PATH_IMAGE040
It is shown that,
Figure 361295DEST_PATH_IMAGE018
for the maximum value of the displacement to be,
Figure 677876DEST_PATH_IMAGE019
is the minimum value of the displacement.
In the present indicator diagrams 2-13, the indicator diagram represents a complete stroke of the operation of the pumping unit, including an up stroke and a down stroke, and a thick solid line in the indicator diagram represents the up stroke: expressed as from a minimum displacement point to a maximum displacement point; the thin solid line in the indicator diagram represents the down stroke: representing the displacement from the point of maximum displacement to the point of minimum displacement.
Example 2
Since the opening/closing points of the suction valve and the discharge valve determined in embodiment 1 have errors, the opening/closing points of the suction valve and the discharge valve need to be corrected
Figure 898773DEST_PATH_IMAGE001
Closing point
Figure 783552DEST_PATH_IMAGE002
(ii) a Opening point of discharge valve
Figure 706378DEST_PATH_IMAGE003
Closing point of
Figure 311802DEST_PATH_IMAGE004
The correction comprises the following steps:
please refer to fig. 9, (1) modify
Figure 777419DEST_PATH_IMAGE001
Point:
Figure 957733DEST_PATH_IMAGE009
1 point must be on the upstroke if
Figure 853008DEST_PATH_IMAGE001
When the point falls on the down stroke, the point moves backwards to the first point of the up stroke, and the calculation is carried out
Figure 652337DEST_PATH_IMAGE001
If the load difference of the point is larger than 0.05KN (the value is an empirical value obtained by calculating the load differences of a large number of indicator diagrams on the basis of big data analysis), 10 points are pushed back from the point, the primary load difference and the secondary load difference of each point in the segment are calculated, and if the primary load differences of all the points in the segment are not smaller than or equal to 0, the point with the minimum secondary load difference in the segment is a new point
Figure 97094DEST_PATH_IMAGE009
Figure 97094DEST_PATH_IMAGE009
2, otherwise, it is the original
Figure 933463DEST_PATH_IMAGE001
And (4) point.
Please refer to fig. 10, (2) modify
Figure 706246DEST_PATH_IMAGE041
Point 1:
Figure 168321DEST_PATH_IMAGE041
1 point must be on the upstroke if
Figure 218316DEST_PATH_IMAGE041
1 point is at down stroke, then it needs to move forward to the last point of up stroke, and calculate
Figure 350220DEST_PATH_IMAGE002
If the load difference is less than-0.06 KN (the value is an empirical value obtained by calculating the load differences of a large number of indicator diagrams on the basis of big data analysis), then 15 points are advanced from the point, and the primary load difference and the secondary load difference of each point in the section are calculated, if the primary load difference in the section is not more than or equal to 0, then the point with the minimum secondary load difference in the section is a new point
Figure 734934DEST_PATH_IMAGE006
Point, otherwise, it is as original
Figure 485852DEST_PATH_IMAGE002
And (4) point.
Please refer to FIG. 11, (3) correction
Figure 780568DEST_PATH_IMAGE003
Point:
Figure 942428DEST_PATH_IMAGE010
1 point must be on the down stroke if
Figure 830749DEST_PATH_IMAGE003
When the point falls on the upper stroke, the point moves backwards to the first point of the lower stroke, and the calculation is carried out
Figure 244413DEST_PATH_IMAGE003
If the primary load difference of the point is less than-0.05 KN (the value is an empirical value obtained by calculating the load differences of a large number of indicator diagrams on the basis of big data analysis), 12 points are pushed back, the primary load difference and the secondary load difference of each point in the section are calculated, and if no point which is greater than or equal to 0 exists in the section, the point with the maximum secondary load difference in the section is the point with the maximum secondary load difference in the section
Figure 535846DEST_PATH_IMAGE007
Point, otherwise, it is as original
Figure 743974DEST_PATH_IMAGE010
Point 1.
Please refer to FIG. 12, (4) correction
Figure 854012DEST_PATH_IMAGE004
Point:
Figure 196001DEST_PATH_IMAGE037
1 point must be on the downstroke if
Figure 199729DEST_PATH_IMAGE037
1 point is in the up stroke, then it needs to move forward to the last point of the down stroke, and calculates
Figure 985282DEST_PATH_IMAGE037
1 point, if the primary load difference is greater than 0.1KN (the value is an empirical value obtained by calculating the load differences of a large number of indicator diagrams on the basis of big data analysis), calculating the primary load difference and the secondary load difference of each point in the section of p (c) + (p (d) -p (c)). 1/5-p (d), and if the secondary load difference is greater than 0.1KN and the displacement is minimum, the point is a new point
Figure 566305DEST_PATH_IMAGE008
Point, otherwise, it is original
Figure 587351DEST_PATH_IMAGE004
And (4) point.
Please refer to fig. 13, (5)
Figure 586531DEST_PATH_IMAGE042
The point of final determination is that the opening point of the suction valve is
Figure 792253DEST_PATH_IMAGE005
The closing point is
Figure 470359DEST_PATH_IMAGE006
(ii) a Indexes are p (a) and p (b), loads are F (a) and F (b), and displacements are u (a) and u (b); the opening point of the discharge valve is
Figure 170462DEST_PATH_IMAGE007
The closing point is
Figure 273416DEST_PATH_IMAGE008
(ii) a The indexes are p (c) and p (d), the loads are F (c) and F (d), and the displacements are u (c) and u (d).
In the above steps (1), (2), (3), (4) and (5), the working principle of the indicator diagram determines
Figure 400772DEST_PATH_IMAGE043
The point must be on the upstroke, so the power diagram abnormality occurs on the downstroke, and the point must be on the stroke
Figure 831753DEST_PATH_IMAGE043
The point is moved to the upper stroke and,
Figure 319235DEST_PATH_IMAGE044
the point must be on the down stroke, so the power diagram abnormality occurs on the up stroke, and the point must be on the down stroke
Figure 27428DEST_PATH_IMAGE045
Point 1 moves to the down stroke.
The method corrects the opening point and the closing point of the suction valve and the opening point and the closing point of the discharge valve by secondary correction, so that the finally determined opening point and closing point errors of the suction valve and the discharge valve are small, and the calculation accuracy of the liquid yield is further improved.
In the above steps (1), (2), (3), (4) and (5), since the indicator diagram is composed of 200 points, each point has a load difference, and the primary load difference calculation formula is:
Figure 184740DEST_PATH_IMAGE046
in the formula (I), the compound is shown in the specification,
Figure 227651DEST_PATH_IMAGE030
in order to obtain a first time load difference,
Figure 128611DEST_PATH_IMAGE031
in order to be the load at the present point,
Figure 956890DEST_PATH_IMAGE032
the load of the previous point.
The secondary load difference calculation formula is:
Figure 409737DEST_PATH_IMAGE047
in the formula (I), the compound is shown in the specification,
Figure 549731DEST_PATH_IMAGE034
in order to obtain the secondary load difference,
Figure 129748DEST_PATH_IMAGE035
the load difference at the latter point.
Example 3
After the indicator diagrams are corrected according to the above examples 1 and 2, the fluid production rate needs to be calculated according to the corrected indicator diagrams, and the formula for calculating the fluid production rate is as follows:
Figure 67661DEST_PATH_IMAGE048
in the formula (I), the compound is shown in the specification,
Figure 832354DEST_PATH_IMAGE021
expressed as the amount of fluid produced,
Figure 335011DEST_PATH_IMAGE022
expressed as time of day, usually expressed in terms of minutes, i.e.
Figure 967986DEST_PATH_IMAGE049
，
Figure 895491DEST_PATH_IMAGE023
As indicated by the effective stroke, the stroke,
Figure 706452DEST_PATH_IMAGE024
denoted as stroke times, where the effective stroke is calculated in terms of the opening and closing points of the suction and discharge valves of the pump, in a manner known in the art and not described in any greater detail herein,
Figure 680093DEST_PATH_IMAGE025
expressed as the cross-sectional area of the pump,
Figure 992126DEST_PATH_IMAGE026
expressed as the density of the produced fluids,
Figure 649503DEST_PATH_IMAGE027
expressed as a fluid production volume factor, the daily fluid production is calculated by calculating the fluid production per minute and multiplying by the minutes per day.
Example 4
The yield measuring software compiled by using the corrected indicator diagram of the invention carries out field yield measurement comparison aiming at a plurality of oil wells of a certain oil production plant, and through the weighing comparison with a field oil pulling vehicle, the accuracy of the yield measuring method of the invention for measuring the liquid yield is improved by 15.11 percent compared with the existing yield measuring method for measuring the liquid yield.
The liquid production amount calculation comparison data statistical table is summarized as shown in table 1:
Figure 615054DEST_PATH_IMAGE050
TABLE 1
One of the statistics of the comparison data of the measured liquid production is shown in Table 2:
Figure 216937DEST_PATH_IMAGE051
TABLE 2
The second statistical table of the comparison data of the measured liquid production is shown in table 3:
Figure 676868DEST_PATH_IMAGE052
TABLE 3
The third statistical table of the comparison data of the measured liquid production is shown in Table 4:
Figure 438020DEST_PATH_IMAGE053
TABLE 4
The third statistical table of the comparison data of the measured liquid production is shown in Table 5:
Figure 449838DEST_PATH_IMAGE054
TABLE 5
As can be seen from the data in tables 1 to 5, the accuracy of calculating the liquid production amount by the corrected indicator diagram is greatly improved compared with the accuracy of the prior art.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In addition, the "/" in this document generally indicates that the former and latter associated objects are in an "or" relationship, but may also indicate an "and/or" relationship, which may be understood with particular reference to the former and latter text.
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (5)

1. A method for calculating oil well liquid production based on a ground indicator diagram is characterized in that: the method comprises the following steps:
s1: determining the opening point of the pump suction valve in the indicator diagram by the quadrilateral vector method
Figure 907593DEST_PATH_IMAGE001
Point of closure
Figure 171215DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 52452DEST_PATH_IMAGE003
Point of closure
Figure 376117DEST_PATH_IMAGE004
；
S2: opening point of suction valve
Figure 687013DEST_PATH_IMAGE001
Point of closure
Figure 3594DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 490070DEST_PATH_IMAGE003
Point of closure
Figure 109270DEST_PATH_IMAGE004
Making a correction to determine the opening point of the suction valve
Figure 297675DEST_PATH_IMAGE005
Point of closure
Figure 168679DEST_PATH_IMAGE006
Opening point of discharge valve
Figure 758929DEST_PATH_IMAGE007
Point of closure
Figure 549030DEST_PATH_IMAGE008
Obtaining a corrected indicator diagram;
s3: calculating the liquid production amount according to the corrected indicator diagram;
in step S1: determination of the opening point of a pump intake valve by means of a quadrilateral vector method
Figure 975464DEST_PATH_IMAGE001
Point of closure
Figure 905286DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 100775DEST_PATH_IMAGE003
Point of closure
Figure 796198DEST_PATH_IMAGE004
The method comprises the following steps:
s1.1: determining the minimum displacement point and the maximum displacement point and connecting the minimum displacement point and the maximum displacement point, and calculating the slope of the connecting line;
s1.2: translating the connecting line to find two tangent points, and defining the tangent points as
Figure 224774DEST_PATH_IMAGE009
Points, the lower tangent point being defined as
Figure 437581DEST_PATH_IMAGE010
Point;
s1.3: will be provided with
Figure 736844DEST_PATH_IMAGE011
Connecting the points into a straight line, calculating
Figure 134328DEST_PATH_IMAGE011
The slope of the connection line;
s1.4: will be provided with
Figure 269774DEST_PATH_IMAGE011
Link translation rework
Figure 269960DEST_PATH_IMAGE012
Point and final determination
Figure 299096DEST_PATH_IMAGE013
Point;
s1.5: will be provided with
Figure 8426DEST_PATH_IMAGE013
Connecting the points into a straight line, calculating
Figure 880436DEST_PATH_IMAGE013
The slope of the connecting line;
s1.6: will be provided with
Figure 169466DEST_PATH_IMAGE013
Link translation rework
Figure 318687DEST_PATH_IMAGE011
Point, finally determined as
Figure 182607DEST_PATH_IMAGE014
Point;
s1.7: finally determining the opening point of the suction valve
Figure 292645DEST_PATH_IMAGE001
Closing point
Figure 900213DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 638362DEST_PATH_IMAGE003
Point of closure
Figure 423915DEST_PATH_IMAGE004
；
In step S1.3 and step S1.5,
Figure 270517DEST_PATH_IMAGE011
the slope of the connecting line,
Figure 291563DEST_PATH_IMAGE013
The slope calculation formula of the connecting line is as follows:
Figure DEST_PATH_IMAGE015
wherein, M represents the slope of the light,
Figure 206255DEST_PATH_IMAGE016
in order to be the maximum value of the load,
Figure 897131DEST_PATH_IMAGE017
in order to be the minimum value of the load,
Figure 840816DEST_PATH_IMAGE018
for the maximum value of the displacement to be,
Figure 790186DEST_PATH_IMAGE019
is the minimum value of displacement;
in step S2, the opening point of the suction valve is set
Figure 643873DEST_PATH_IMAGE001
Closing point
Figure 895862DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 451478DEST_PATH_IMAGE003
Point of closure
Figure 689692DEST_PATH_IMAGE004
The correction comprises the following steps:
S2.1：
Figure 912732DEST_PATH_IMAGE001
the point is at the down stroke, moves backwards to the first point of the up stroke, and calculates
Figure 70044DEST_PATH_IMAGE001
The primary load difference of the points is larger than 0.05KN, 10 points are pushed back from the first point, the primary load difference and the secondary load difference of each point are calculated, the primary load difference of each point is larger than or equal to 0, and the point with the minimum secondary load difference is a new point
Figure 863687DEST_PATH_IMAGE005
Point, otherwise, it is as original
Figure 154860DEST_PATH_IMAGE001
Point;
in step S2, the opening point of the suction valve is set
Figure 107773DEST_PATH_IMAGE001
Closing point
Figure 576931DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 107139DEST_PATH_IMAGE003
Point of closure
Figure 687156DEST_PATH_IMAGE004
The correction further comprises the following steps:
S2.2：
Figure 494575DEST_PATH_IMAGE002
the point is at the down stroke, and the point is moved forward to the last point of the up stroke, and the calculation is carried out
Figure 118323DEST_PATH_IMAGE002
The first load difference of the points is less than-0.06 KN, 15 points are pushed forward from the last point, the first load difference and the second load difference of each point are calculated, the first load difference of each point is less than 0, and the point with the minimum second load difference is a new point
Figure 886559DEST_PATH_IMAGE006
Point, otherwise, it is as original
Figure 394901DEST_PATH_IMAGE002
Point;
in step S3, the liquid production amount is calculated according to the corrected indicator diagram, and the calculation formula is as follows:
Figure 181460DEST_PATH_IMAGE020
in the formula (I), the compound is shown in the specification,
Figure DEST_PATH_IMAGE021
expressed as the amount of fluid produced,
Figure 919652DEST_PATH_IMAGE022
as indicated by the time of day,
Figure 299818DEST_PATH_IMAGE023
as indicated by the effective stroke, the stroke,
Figure 487216DEST_PATH_IMAGE024
indicated as a number of strokes in a stroke,
Figure 128282DEST_PATH_IMAGE025
expressed as the cross-sectional area of the pump,
Figure 110145DEST_PATH_IMAGE026
expressed as the density of the produced fluid,
Figure 977607DEST_PATH_IMAGE027
expressed as the yield volume factor.
2. The method for calculating the fluid production capacity of an oil well based on the ground indicator diagram of claim 1, wherein: in step S2, the opening point of the suction valve is set
Figure 952385DEST_PATH_IMAGE001
Point of closure
Figure 464269DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 866300DEST_PATH_IMAGE003
Closing point
Figure 221058DEST_PATH_IMAGE004
The correction further comprises the following steps:
S2.3：
Figure 219101DEST_PATH_IMAGE003
on the upstroke, moving back to the first point of the downstroke, calculating
Figure 834759DEST_PATH_IMAGE003
The primary load difference of the points is less than-0.05 KN, 12 points are pushed back from the first point, the primary load difference and the secondary load difference of each point are calculated, the primary load difference of each point is less than 0, and the point with the maximum secondary load difference is
Figure 548637DEST_PATH_IMAGE007
Point, otherwise, it is as original
Figure 478DEST_PATH_IMAGE003
And (4) point.
3. The method of claim 2 for calculating fluid production from an oil well based on a surface indicator diagram, wherein: in step S2, the opening point of the suction valve is set
Figure 317059DEST_PATH_IMAGE001
Point of closure
Figure 803535DEST_PATH_IMAGE002
Opening point of discharge valve
Figure 422735DEST_PATH_IMAGE003
Point of closure
Figure 345561DEST_PATH_IMAGE004
The correction further comprises the following steps:
S2.4：
Figure 216565DEST_PATH_IMAGE004
the point is at the upper stroke, and the point is moved forward to the last point of the lower stroke, and the calculation is carried out
Figure 682181DEST_PATH_IMAGE004
The first load difference of the points is more than 0.1KN, and calculation is carried out
Figure 596916DEST_PATH_IMAGE028
The primary load difference and the secondary load difference of each point in the section are greater than 0.1KN, the displacement is minimum, and the point is new
Figure 23350DEST_PATH_IMAGE008
Point, otherwise, it is as original
Figure 291520DEST_PATH_IMAGE004
Point;
wherein p (c) is the opening point of the discharge valve
Figure 753855DEST_PATH_IMAGE010
P (d) is the discharge valve closing point
Figure 855803DEST_PATH_IMAGE004
Is used to determine the index of (1).
4. The method of claim 3 for calculating oil well fluid production based on a surface indicator diagram, wherein: the indicator diagram is composed of 200 points, each point has a load difference, and a primary load difference calculation formula is as follows:
Figure 18800DEST_PATH_IMAGE029
in the formula (I), the compound is shown in the specification,
Figure 90661DEST_PATH_IMAGE030
in order to obtain a first time load difference,
Figure DEST_PATH_IMAGE031
in order to be the load at the present point,
Figure 327607DEST_PATH_IMAGE032
the load at the previous point;
the secondary load difference calculation formula is as follows:
Figure 193932DEST_PATH_IMAGE033
in the formula (I), the compound is shown in the specification,
Figure 860537DEST_PATH_IMAGE034
in order to obtain the secondary load difference,
Figure 595144DEST_PATH_IMAGE035
the load difference at the latter point.
5. The method of claim 1 for calculating fluid production from an oil well based on a surface indicator diagram, wherein:
Figure 765225DEST_PATH_IMAGE022
expressed as time of day, converted to minutes, the formula is:
Figure 333609DEST_PATH_IMAGE036
the effective stroke is calculated according to the opening point and the closing point of the suction valve and the discharge valve of the pump, and the liquid production quantity per minute is calculated and multiplied by the number of minutes per day to calculate the liquid production quantity per day.
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