CN104060973A - Method for setting reasonable partial pressure points in partial pressure reconstruction of water injection station - Google Patents
Method for setting reasonable partial pressure points in partial pressure reconstruction of water injection station Download PDFInfo
- Publication number
- CN104060973A CN104060973A CN201410173554.1A CN201410173554A CN104060973A CN 104060973 A CN104060973 A CN 104060973A CN 201410173554 A CN201410173554 A CN 201410173554A CN 104060973 A CN104060973 A CN 104060973A
- Authority
- CN
- China
- Prior art keywords
- water
- injection
- water injection
- partial pressure
- station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention relates to a method for setting reasonable partial pressure points in the partial pressure reconstruction of a water injection station. The method comprises the following steps: assuming that the water injection station can conduct partial pressure water injection at arbitrary pressure points, and setting 21 assumptive partial pressure points at intervals of 0.5 MPa within the water injection pressure range of 3-13.5 MPa; calculating the minimum useful work output by the water injection station of partial pressure water injection schemes of the assumptive partial pressure points; calculating the machine set efficiency in the water injection station of the assumptive partial pressure water injection schemes; calculating the energy consumption of the water injection station of the partial pressure water injection schemes of the assumptive partial pressure points; comparing to preferably select the minimum energy consumption schemes, and obtaining a plurality of minimum energy consumption partial pressure water injection schemes through energy consumption comparison of the water injection station of the partial pressure water injection schemes of the assumptive partial pressure points; investing the optimal scheme preferably selected, designing the adjustment reconstruction construction scheme and the off-station pipe network adjustment construction scheme of the water injection pump machine set in the water injection station of the minimum energy consumption partial pressure water injection schemes, and comparing the investment amounts of the schemes to select the partial pressure water injection scheme of the water injection station with minimum investment and minimum energy consumption.
Description
Technical field
The present invention relates to a kind of method that reasonable dividing point is established in water-injection station dividing potential drop transformation, find out Scientific Approaches and theoretical template that water-injection station dividing potential drop transformation lowest energy consumption dividing point is selected, for high pressure centrifugal pump water-injection station dividing potential drop energy saving technical reconstruction provides an effective and rapid rational approach.
Background technology
Rejection of oil flied effluent pattern is substantially at present: Produced Liquid carries out oil and gas and water at sewage plant and enters water-injection station from rear sewage by low-pressure adjusting water system, transports to the each distributing room for water injection of outer net and carry out re-injection to individual well again after by centrifugal high pressure pumping plant, it being boosted.And in whole process, because each individual well in-place permeability difference is large, water pressure demand is differed, height differ greatly even can reach 10MPa more than, but water flooding pump station outlet pressure is the highest constant requirements, this just causes can existing valve control to be held back in whole system running, this inevitable link of energy loss.In the large system of fractional water flooding pressure gap, energy loss is very serious, and whole system efficiency is also far below normal value.The selection of the core dividing point of current centrifugal high pressure pumping plant dividing potential drop renovation technique is all to establish by tentative calculation, does not have sturdy theoretical foundation and proves fully.And in the process of implementing in the transformation of whole dividing potential drop, the establishment of the dividing point most important thing exactly, it transforms by directly having influence on dividing potential drop the height that energy-saving and cost-reducing effect and whole engineering drop into.Object of the present invention is the theoretic discussion that the computational methods by each hypothesis dividing point Partial pressure water injection scheme water-injection station is exported to unit efficiency in minimum useful work, water-injection station, water-injection station energy consumption are carried out, find out Scientific Approaches and theoretical template that water-injection station dividing potential drop transformation lowest energy consumption dividing point is selected, for high pressure centrifugal pump water-injection station dividing potential drop energy saving technical reconstruction provides an effective and rapid rational approach.In of this sort system, water-injection station is carried out to dividing potential drop transformation and just possessed Necessity and feasibility.The present invention wins nine water filling regions as example taking Shengli Oil Field triumph oil recovery factory, is set forth in how to select reasonable dividing point to carry out dividing potential drop transformation just to make system energy consumption minimum and drop into minimum, most effective in this region.Also for centrifugal high pressure water flooding pump station Partial pressure water injection energy saving technical reconstruction from now on provides theoretical foundation.
Summary of the invention
The object of this invention is to provide a kind of method that reasonable dividing point is established in water-injection station dividing potential drop transformation, overcome the defect that above-mentioned prior art exists.
Technical scheme of the present invention is achieved in the following ways:
A, setting water-injection station can carry out Partial pressure water injection at any pressure spot, and water injection pressure 3MPa is set to 21 hypothesis dividing points within the scope of 13.5MPa taking 0.5MPa as an interval;
B, calculate each hypothesis dividing point Partial pressure water injection scheme water-injection station and export minimum useful work; The water injection rate of high-pressure system and the water injection rate of low-pressure system when calculating water-injection station carries out Partial pressure water injection under each hypothesis dividing point, extrapolate by water injection pressure and the water injection rate of high-low pressure flood pattern the minimum useful work that each hypothesis dividing point Partial pressure water injection scheme water-injection station need to be exported;
C, calculate unit efficiency in the water-injection station of each hypothesis Partial pressure water injection scheme, each hypothesis Partial pressure water injection scheme is mated to a set of water injecting pump unit, try to achieve the water injecting pump pump efficiency of every sets of plan according to different displacements centrifugal pump pump efficiency curve, get constant motor efficiency, can calculate the interior unit efficiency of water-injection station of each hypothesis Partial pressure water injection scheme;
The energy consumption of D, calculating hypothesis dividing point Partial pressure water injection scheme water-injection station, in the minimum useful work that need to export by each hypothesis dividing point Partial pressure water injection scheme water-injection station and water-injection station, unit efficiency can calculate the energy consumption of each hypothesis dividing point Partial pressure water injection scheme water-injection station;
E, compare preferred lowest energy consumption scheme, by the energy consumption comparison of each hypothesis dividing point Partial pressure water injection scheme water-injection station, can draw some lowest energy consumption Partial pressure water injection schemes;
F, output investment ratio are to preferred optimal case, the adjustment improvement project scheme of water injecting pump unit in the water-injection station station of some lowest energy consumption Partial pressure water injection schemes and station outside ductwork adjustment engineering proposal are designed, investment amount to each scheme contrasts, and can select the minimum water-injection station Partial pressure water injection scheme of investment lowest energy consumption.
The calculation procedure of minimum useful work:
Calculate water-injection station pump pressure
The computational methods of predicting water injection well demand water-injection station pump pressure after the retrofit scheme of every mouthful of water injection well are as follows:
Pf＝ΔP+Py＝Pb-Pg+Py
Wherein: after Pf---retrofit scheme, predict water injection well demand water-injection station pump pressure, units MPa;
The current water-injection station of Δ P---damages to the actual pipe of distributing room for water injection, units MPa;
The current water-injection station pump pressure of Pb---, units MPa;
The current distributing room for water injection dry-pressing of Pg---, units MPa;
The current water injection well distributing room for water injection of Py---oil pressure, units MPa.
Calculate water injection rate
Each hypothesis dividing point dividing potential drop modification scheme high and low pressure system water yield design formulas is as follows:
Qg(x)＝Qj(x～x+0.5)+Qj(x+0.5～x+1)……+Qj(13～13.5)
Qd(x)＝Qj(0～3)+Qj(3～3.5)+Qj(3.5～4)……+Qj(x-0.5～x)
Wherein: Qg (x)---suppose modification scheme high-pressure system water injection rate, the m of unit
3;
Qd (x)---suppose modification scheme low-pressure system water injection rate, the m of unit
3;
Qj (x～x+0.5)---be distributed in the individual well water yield in corresponding hypothesis dividing point x to x+0.5MPa interval, the m of unit
3;
X----hypothesis modification scheme high and low pressure system dividing point, units MPa.
Calculate minimum useful work
The minimum useful work of each hypothesis dividing point waterflood project high-low pressure part output.
Wg＝Qg(x)×13.5
Wd＝Qd(x)×x
Wy＝Wg+Wd
Wherein: Wg represents that system rises to 13.5MPa institute work, the J of unit to the high-pressure section water yield
Wd represents that system rises to x institute work, the J of unit to the low-pressure section water yield
Wy represents the minimum useful work of water-injection station output, the J of unit
Unit efficiency calculation procedure:
Simulate two pump efficiency curve maps (Fig. 5 Fig. 6) in any discharge capacity situation
According to the current each model centrifugal pump discharge capacity-pump efficiency of domestic current production corresponding relation, simulate pump efficiency curve map in two any discharge capacity situations (the upper and lower pumpage-pump efficiency of DF160 corresponding relation changes greatly).
Below DF160: y=18.41ln (x)+24.03,
More than DF160: y=0.217x+74.91
Wherein: y representation theory pump efficiency
X represents pumpage (x is any discharge capacity in 0～500 scope)
Pump type preferably calculates with pump efficiency
According to two matched curves, suppose that certain dividing point pumpage demand is Am
3(A>500), two pumps discharge capacity is respectively Zm
3and Ym
3can obtain following relation: Z+Y=A (Z, Y≤500), two pumps pump efficiency is: ∮=[(18.41ln (Z)+24.03] × Z+ (0.217Y+74.91) × Y}/A, or ∮=[(18.41ln (Z)+24.03] × Z+[(18.41ln (Y)+24.03] × Y}/A
Wherein: ∮ represents the theoretical displacement after different pump type combinations
Z, Y represent respectively the discharge capacity of two pumps
Can draw through deriving, when Z × Y hour, pump efficiency maximum, pump efficiency ∮ and Z (A-Z) are inversely proportional to, and therefore in the time that pump combines, should select two kinds of minimum and maximum pumps of discharge capacity to mate, under existing technical condition, wherein a pumpage is 500m
3/ h pump, another is the remainder of demand discharge capacity.
Dividing point lowest energy consumption is calculated
The total energy consumption of each hypothesis dividing point water-injection station is the computational methods of the input work of motor:
N＝Wy/∮(x)
Wherein: N is water-injection station total energy consumption, the J of unit
Wy exports minimum useful work, the J of unit for calculating gained water-injection station before.
∮ (x) is the unit efficiency of hypothesis dividing point x.
By calculating each hypothesis dividing point water-injection station total energy consumption:
Each hypothesis dividing point total energy consumption is multiplied by water-injection station standard mark consumption and obtains its power consumption,
q＝N×0.2697kW·h/m
3MPa。
Wherein: q is power consumption, the kWh of unit
N is water-injection station total energy consumption, the J of unit
0.2697kWh/m
3mPa is for calculating gained standard mark consumption
In the time that hypothesis dividing point is 10.0MPa, 11MPa, power consumption is relatively low, is respectively 76789kWh/ days, 77036kWh/ days.
Advantage of the present invention is: the theoretic discussion of being undertaken by the computational methods that each hypothesis dividing point Partial pressure water injection scheme water-injection station is exported to unit efficiency in minimum useful work, water-injection station, water-injection station energy consumption, find out Scientific Approaches and theoretical template that water-injection station dividing potential drop transformation lowest energy consumption dividing point is selected, for high pressure centrifugal pump water-injection station dividing potential drop energy saving technical reconstruction provides an effective and rapid rational approach
Brief description of the drawings
Fig. 1-water filling schematic flow sheet
Fig. 2-water filling actual demand pump pressure scope normal distribution
Fig. 3-water yield-suppose dividing point graph of a relation
Fig. 4-respectively suppose dividing point pumping plant output acting statistical chart
Fig. 5-water filling discharge capacity 160 cubes of following pump efficiency curve maps per hour
Fig. 6-water filling discharge capacity more than 160 cubes pump efficiency curve map per hour
Fig. 7-respectively suppose dividing point water-injection station total energy consumption curve map
Fig. 8-respectively the suppose dividing point water yield-power consumption-dividing point graph of a relation
A-overall water injection plant B-water filling substation C-distributing room for water injection 1,2,3-water filling pound sign in Fig. 1.
Detailed description of the invention
For further disclosing technical scheme of the present invention, elaborate by embodiment below in conjunction with Figure of description:
Technical scheme of the present invention is achieved in the following ways:
A, setting water-injection station can carry out Partial pressure water injection at any pressure spot, and water injection pressure 3MPa is set to 21 hypothesis dividing points within the scope of 13.5MPa taking 0.5MPa as an interval;
B, calculate each hypothesis dividing point Partial pressure water injection scheme water-injection station and export minimum useful work; The water injection rate of high-pressure system and the water injection rate of low-pressure system when calculating water-injection station carries out Partial pressure water injection under each hypothesis dividing point, extrapolate by water injection pressure and the water injection rate of high-low pressure flood pattern the minimum useful work that each hypothesis dividing point Partial pressure water injection scheme water-injection station need to be exported;
C, calculate unit efficiency in the water-injection station of each hypothesis Partial pressure water injection scheme, each hypothesis Partial pressure water injection scheme is mated to a set of water injecting pump unit, try to achieve the water injecting pump pump efficiency of every sets of plan according to different displacements centrifugal pump pump efficiency curve, get constant motor efficiency, can calculate the interior unit efficiency of water-injection station of each hypothesis Partial pressure water injection scheme;
The energy consumption of D, calculating hypothesis dividing point Partial pressure water injection scheme water-injection station, in the minimum useful work that need to export by each hypothesis dividing point Partial pressure water injection scheme water-injection station and water-injection station, unit efficiency can calculate the energy consumption of each hypothesis dividing point Partial pressure water injection scheme water-injection station;
E, compare preferred lowest energy consumption scheme, by the energy consumption comparison of each hypothesis dividing point Partial pressure water injection scheme water-injection station, can draw some lowest energy consumption Partial pressure water injection schemes;
F, output investment ratio are to preferred optimal case, the adjustment improvement project scheme of water injecting pump unit in the water-injection station station of some lowest energy consumption Partial pressure water injection schemes and station outside ductwork adjustment engineering proposal are designed, investment amount to each scheme contrasts, and can select the minimum water-injection station Partial pressure water injection scheme of investment lowest energy consumption.
Specific embodiment:
One, the reasonable dividing point establishment method of water-injection station dividing potential drop energy saving technical reconstruction
(1) calculate each hypothesis dividing point Partial pressure water injection scheme water-injection station and export minimum useful work
1, the calculating of each water injection well demand water filling pump pressure
Win after nine water-injection stations boost to 13.5MPa by the sewage of the two multi-purpose station processing that stick together by high pressure centrifugal pump and transport to each distribution well, be dispensed to each individual well (as Fig. 1) by distribution well.All there is pipe network loss in each (propping up) main line, single well pipeline wherein, and distributing room for water injection exists valve control loss.Study a question for convenience, from source, to predicting after retrofit scheme that each water injection well demand water-injection station pump pressure calculates.Because each (propping up) main line diameter, length, flow, flow velocity, material before and after Partial pressure water injection scheme implementation all design according to oilfield flooding pipeline network design standard, therefore can think that the each water flooding well pipe in water-injection station dividing potential drop transformation front and back damages consistent.So, after the retrofit scheme of every mouthful of water injection well, predict that the computational methods of water injection well demand water-injection station pump pressure are as follows:
Pf＝ΔP+Py＝Pb-Pg+Py
Wherein: after Pf---retrofit scheme, predict water injection well demand water-injection station pump pressure, units MPa;
The current water-injection station of Δ P---damages to the actual pipe of distributing room for water injection, units MPa;
The current water-injection station pump pressure of Pb---, units MPa;
The current distributing room for water injection dry-pressing of Pg---, units MPa;
The current water injection well distributing room for water injection of Py---oil pressure, units MPa.
After calculating every mouthful of water injection well retrofit scheme, predicting water filling pump pressure, is an interval section according to the every 0.5MPa of water filling pump pressure, can obtain water injection well and count normal distribution at the well in demand water injecting pump pressure pressure interval.As can see from Figure 2, victory each water injecting pump pressure pressure interval of nine notes has water injection well well to exist substantially, distributes and comparatively disperses.
2, respectively suppose the calculating of dividing point Partial pressure water injection scheme high-low pressure water injection rate
Water injecting pump is pressed in 3MPa and sets 21 hypothesis dividing points taking 0.5MPa as an interval within the scope of 13.5MPa, well according to above-mentioned water injecting pump pressure pressure interval is counted normal distribution, the high-low pressure part water yield to each hypothesis dividing point is added up respectively, the well water amount that the water filling actual demand pump pressure of water injection well is less than (equaling) supposition dividing point counts low-pressure system, the water filling actual demand pump pressure of water injection well is greater than supposes that the water yield of dividing point counts high-pressure system, respectively supposes that dividing point dividing potential drop modification scheme high and low pressure system water yield design formulas is as follows:
Qg(x)＝Qj(x～x+0.5)+Qj(x+0.5～x+1)……+Qj(13～13.5)
Qd(x)＝Qj(0～3)+Qj(3～3.5)+Qj(3.5～4)……+Qj(x-0.5～x)
Wherein: Qg (x)---suppose modification scheme high-pressure system water injection rate, the m of unit
3;
Qd (x)---suppose modification scheme low-pressure system water injection rate, the m of unit
3;
Qj (x～x+0.5)---be distributed in corresponding hypothesis dividing point x to x+0.5MPa interval the individual well water yield and, the m of unit
3;
X----hypothesis modification scheme high and low pressure system dividing point, units MPa.
By calculating, obtain each hypothesis dividing point dividing potential drop modification scheme high and low pressure system water distribution (as Fig. 3).The calculating of exporting minimum useful work for next step water-injection station lays the foundation.
3, respectively suppose the calculating that dividing point Partial pressure water injection scheme water-injection station is exported minimum useful work
Rest under the situation of each hypothesis dividing point waterflood project dividing potential drop, the water yield of high-low pressure part and adherence pressure demand, computational methods according to mark consumption: 1 side's water extraction rises 1MPa institute work, can obtain the minimum useful work (as Fig. 4) that each hypothesis dividing point waterflood project high-low pressure part is exported.
Wg＝Qg(x)×13.5
Wd＝Qd(x)×x
Wy＝Wg+Wd
Wherein: Wg represents that system rises to 13.5MPa institute work, the J of unit to the high-pressure section water yield
Wd represents that system rises to x institute work, the J of unit to the low-pressure section water yield
Wy represents the minimum useful work of water-injection station output, the J of unit
(2) respectively suppose the calculating of unit efficiency in the water-injection station of Partial pressure water injection scheme
In the first most research, we are from the actual demand of the each individual well water filling of outer net, along the direction of individual well-distributing room for water injection-water-injection station, the loss of purger control node, has calculated the minimum useful work that after dividing potential drop transformation, respectively hypothesis dividing point water-injection station need to do.But this merit is also theory demands, when pumping station operation, exist electric efficiency, pump efficiency and pump dry-pressing to differ from three factors impacts, and pump dry-pressing is poor little in dividing potential drop transformation front and back variation, substantially can ignore the impact of entire system research; Electric efficiency is through investigating at present domestic level substantially all in 96% left and right, and these two factors are not as the object of studying herein, and we further investigate lower step the pump efficiency in station.
At present, in 16MPa flood pattern, China's centrifugal multistage pump multiple centrifugal pump development level basic condition is: in operation, relatively stably under condition, discharge capacity can be up to 500m
3/ h, pump type is larger, and theoretical pump efficiency is higher, the highlyest can reach 83%.And before us, the calculating of the high-low pressure water yield after dividing potential drop transformation is shown, part supposes that the dividing point water yield may be greater than 500m
3/ h, at this moment, we just need to meet water filling demand by the combination of the pump of two reasonable discharge capacities, the therefore rational pump type combination of how to confirm,, energy consumption the highest in the hope of pump efficiency is minimum is the key point of lower step research.We divide three step researchs:
1, respectively suppose the coupling of Partial pressure water injection scheme water-injection station pump type
Each hypothesis dividing potential drop point value calculates pump instantaneous displacement requirements (in table 1) according to the corresponding high-low pressure part water yield after determining.When discharge capacity is less than or equal to 500m
3when/h, use single centrifugal multistage pump multiple centrifugal pump; When discharge capacity is greater than 500m
3when/h, need mate combination with two pumps and meet discharge capacity demand.
The each hypothesis of table 1 dividing point pump instantaneous displacement requirements
Discharge capacity demand is greater than 500m
3the hypothesis dividing point of/h co-exists in following 20 kinds of situations (as table 2), for convenience of research, and the first fixing wherein pump type of 1 pump, and with every 50m
3select pump as a step, these combinations are studied, find out the rear the highest mode of pump efficiency of combination.
Table 2 is greater than 500m
3/ h displacement pump combination statistical form
Next step finds out according to different pumpages the combination that pump efficiency is the highest.
2, the demonstration of single centrifugal multistage pump multiple centrifugal pump and multiple centrifugal pump coupling discharge capacity and relationship between efficiency
36 of the total centrifugal multistage pump multiple centrifugal pumps of the each water-injection station in triumph oil recovery factory, turn round 17 at present, and these centrifugal pump discharge capacities and pump efficiency are as shown:
Table 3: oil recovery factory is using water flooding pump station real pump effect statistical form
Between these pump deliveries and pump efficiency, substantially follow the higher relation of the larger pump efficiency of discharge capacity, for looking for the theoretical pump efficiency of any displacement pump, first we study (as table 4) to existing pumpage-theoretical pump efficiency relation.
Table 4: centrifugal pump discharge capacity-theoretical pump efficiency mapping table
According to the current each model centrifugal pump discharge capacity-pump efficiency of domestic current production corresponding relation, simulate in two any discharge capacity situations pump efficiency curve map as Fig. 5,6 (the upper and lower pumpage-pump efficiency of DF160 corresponding relation changes greatly).
Below DF160: y=18.41ln (x)+24.03,
More than DF160: y=0.217x+74.91
Wherein: y representation theory pump efficiency
X represents pumpage (x is any discharge capacity in 0～500 scope)
According to these two matched curves, we need to by theory calculate solve 20 kinds of situation pump types that hypothesis dividing point that the discharge capacity demand of mentioning in table 2 is above greater than 500m3/h co-exists in preferably.
Suppose that certain dividing point pumpage demand is Am
3(A>500), two pumps discharge capacity is respectively Zm
3and Ym
3, can obtain following relation: Z+Y=A (Z, Y≤500), two pumps pump efficiency is: ∮=[(18.41ln (Z)+24.03] × Z+ (0.217Y+74.91) × Y}/A, or
∮＝{[(18.41ln(Z)+24.03]×Z+[(18.41ln(Y)+24.03]×Y}/A，
Wherein: ∮ represents the theoretical displacement after different pump type combinations
Z, Y represent respectively the discharge capacity of two pumps
Can draw through deriving, when Z × Y hour, pump efficiency maximum, pump efficiency ∮ and Z (A-Z) are inversely proportional to, and therefore in the time that pump combines, should select two kinds of minimum and maximum pumps of discharge capacity to mate, under existing technical condition, wherein a pumpage is 500m
3/ h pump, another is the remainder of demand discharge capacity.
3, respectively suppose the calculating of the interior unit efficiency of water-injection station of Partial pressure water injection scheme
According to the research of the corresponding curve of above discharge capacity-pump efficiency, by discharge capacity substitution formula, can show that discharge capacity is less than or equal to 500m
3when/h, single centrifugal multistage pump multiple centrifugal pump pump efficiency and be greater than 500m when discharge capacity
3the average pump efficiency of two pumps coupling combination when/h.Respectively be greater than 500m
3the dividing point pump type of/h discharge capacity demand is selected as table 5:
Table 5 is greater than 500m
3the reasonable assembly statistical form of/h displacement pump
According to the theoretical pump efficiency design formulas of each pump type, calculate each hypothesis dividing point high-low pressure part of theory pump efficiency, after two parts weighted average, obtain the theoretical pump efficiency of whole system, electric efficiency unification, according to 96% calculating, can obtain unit efficiency in each hypothesis dividing point station.(as table 6)
Unit efficiency statistical form in the each hypothesis of table 6 dividing point station
(3) in each hypothesis Partial pressure water injection scheme, compare preferred lowest energy consumption scheme
By above two-part theoretical research, we have obtained output work and the unit efficiency of pumping plant after each hypothesis dividing point dividing potential drop, and lower step just can be made prediction to the energy consumption at station, by the reasonable dividing point of calculative determination to each hypothesis dividing point energy consumption height.
1, victory nine water-injection station standard mark consumptions are calculated
Win nine notes 1-12 month in 2012 and produce basal conditions (table 7):
Introducing standard mark consumption concept herein wins nine notes and is assumed to the mark consumption under 100% state at station overall efficiency, this concept is equivalent to all water-injection station internal loss factors all to foreclose, be 100% at electric efficiency, pump efficiency, pump dry-pressing is poor is the water-injection station mark consumption under 0 state, for the calculating of total power consumption after lower step dividing potential drop is laid the groundwork.The operating condition of victory nine notes is average day water supply 17301m at present
3, day power consumption 85465kWh, standard mark consumption 0.2697kWh/m
3mPa.
2, respectively suppose the energy consumption calculation of dividing point Partial pressure water injection scheme water-injection station
The total energy consumption of each hypothesis dividing point water-injection station is the computational methods of the input work of motor:
N＝Wy/∮(x)
Wherein: N is water-injection station total energy consumption, the J of unit
Wy exports minimum useful work, the J of unit for calculating gained water-injection station before
∮ (x) is the unit efficiency of hypothesis dividing point x
By calculating each hypothesis dividing point water-injection station total energy consumption (as Fig. 7).
Each hypothesis dividing point total energy consumption is multiplied by water-injection station standard mark consumption and obtains its power consumption:
q＝N×0.2697kW·h/m
3MPa。
Wherein: q is power consumption, the kWh of unit
N is water-injection station total energy consumption, the J of unit
0.2697kWh/m
3mPa is for calculating gained standard mark consumption
In the time that hypothesis dividing point is 10.0MPa, 11MPa, power consumption is relatively low, is respectively 76789kWh/ days, 77036kWh/ days.As Fig. 8
3, compare preferred lowest energy consumption scheme
Contrasting each dividing point total energy consumption curve map can draw: in the time that hypothesis dividing point is 10.0MPa, 11.0MPa, power consumption is relatively low, is respectively 76789kWh/ days, 77036kWh days.Select these two hypothesis dividing points to do scheme comparative analysis, next step,, according to centrifugal pump and station outside ductwork in its high-low pressure water yield coupling station, preferably invests lower one case.
(4) prove output investment ratio to preferred optimum Partial pressure water injection scheme
1, engineering design thinking and the scheme optimization of each dividing potential drop scheme
Engineering design thinking is mainly followed following 3 principles: (1), according to the difference of the different dividing point high-low pressure water yields, fully reuses by the renewal of the water injecting pump pump housing, motor, form high-low pressure 2 and overlap pump group, and high-low pressure water injecting pump is for subsequent use each other; (2) high-low pressure part water knockout drum UNICOM, in the time that low-pressure section goes wrong, high-pressure pump can supply water; (3) stand that outside ductwork low-pressure line fully reuses, the newly-built the least possible distributing room for water injection of correct position, high-low pressure water injection well distribute nearby, with the efficient new outer net of minimum investment construction.
Research by Part III to energy consumption height, we select 10MPa (scheme one) and two dividing points of 11MPa (scheme two) to do scheme contrast, do investment ratio.
2, water-injection station energy consumption index contrast before program prediction and transformation
Victory nine water-injection station day power consumption 85469kWh before transformation, average pump efficiency 67.2%, after transformation, scheme one is estimated a day power consumption 76789kWh, 205.9 ten thousand yuan of year power cost savings, scheme two is estimated a day power consumption 77036kWh, 200.1 ten thousand yuan of year power cost savings.
Operating condition contrast table before and after table 8 dividing potential drop
Through design department's budget, the general item investment moon is 8,000,000 yuan, and 4 years recoverable.
Four, conclusion
1, the dividing potential drop modification scheme of water-injection station is the effective way of next step high-voltage energy-saving.
2, the key problem in technology of dividing potential drop transformation is the selection of dividing point, and energy-saving and cost-reducing dynamics is depended in the selection of dividing point.The whether feasible input-output ratio that depends on of dividing potential drop transformation.
3, Scientific Approaches and theoretical template that the minimum investment of Partial pressure water injection lowest energy consumption dividing point is selected have been set up herein.For centrifugal high pressure water flooding pump station Partial pressure water injection energy saving technical reconstruction from now on provides theoretical foundation.
Claims (4)
1. the method that reasonable dividing point is established in the transformation of water-injection station dividing potential drop, technical scheme of the present invention comprises following content:
A, setting water-injection station can carry out Partial pressure water injection at any pressure spot, and water injection pressure 3MPa is set to 21 hypothesis dividing points within the scope of 13.5MPa taking 0.5MPa as an interval;
B, calculate each hypothesis dividing point Partial pressure water injection scheme water-injection station and export minimum useful work; The water injection rate of high-pressure system and the water injection rate of low-pressure system when calculating water-injection station carries out Partial pressure water injection under each hypothesis dividing point, extrapolate by water injection pressure and the water injection rate of high-low pressure flood pattern the minimum useful work that each hypothesis dividing point Partial pressure water injection scheme water-injection station need to be exported;
C, calculate unit efficiency in the water-injection station of each hypothesis Partial pressure water injection scheme, each hypothesis Partial pressure water injection scheme is mated to a set of water injecting pump unit, try to achieve the water injecting pump pump efficiency of every sets of plan according to different displacements centrifugal pump pump efficiency curve, get constant motor efficiency, can calculate the interior unit efficiency of water-injection station of each hypothesis Partial pressure water injection scheme;
The energy consumption of D, calculating hypothesis dividing point Partial pressure water injection scheme water-injection station, in the minimum useful work that need to export by each hypothesis dividing point Partial pressure water injection scheme water-injection station and water-injection station, unit efficiency can calculate the energy consumption of each hypothesis dividing point Partial pressure water injection scheme water-injection station;
E, compare preferred lowest energy consumption scheme, by the energy consumption comparison of each hypothesis dividing point Partial pressure water injection scheme water-injection station, can draw some lowest energy consumption Partial pressure water injection schemes;
F, output investment ratio are to preferred optimal case, the adjustment improvement project scheme of water injecting pump unit in the water-injection station station of some lowest energy consumption Partial pressure water injection schemes and station outside ductwork adjustment engineering proposal are designed, investment amount to each scheme contrasts, and can select the minimum water-injection station Partial pressure water injection scheme of investment lowest energy consumption.
2. the method that reasonable dividing point is established in a kind of water-injection station dividing potential drop transformation according to claim 1, is characterized in that: the minimum useful work that each hypothesis dividing point Partial pressure water injection scheme water-injection station need to be exported is that water-injection station pump pressure and the water injection rate by calculating calculates;
The computational methods of predicting water injection well demand water-injection station pump pressure after the retrofit scheme of every mouthful of water injection well are:
Pf=ΔP+Py
=Pb-Pg+Py
Wherein: after Pf---retrofit scheme, predict water injection well demand water-injection station pump pressure, units MPa;
The current water-injection station of Δ P---damages to the actual pipe of distributing room for water injection, units MPa;
The current water-injection station pump pressure of Pb---, units MPa;
The current distributing room for water injection dry-pressing of Pg---, units MPa;
The current water injection well distributing room for water injection of Py---oil pressure, units MPa;
Each hypothesis dividing point dividing potential drop modification scheme high and low pressure system water yield computational methods are:
Qg（x）= Qj(x～x+0.5)+ Qj(x+0.5～x+1)……+Qj(13～13.5)
Qd（x）= Qj(0～3)+ Qj(3～3.5)+ Qj(3.5～4)……+Qj(x-0.5～x)
Wherein: Qg(x)---suppose modification scheme high-pressure system water injection rate, the m of unit
3;
Qd(x)---suppose modification scheme low-pressure system water injection rate, the m of unit
3;
Qj(x～x+0.5)---be distributed in corresponding hypothesis dividing point x to x+0.5MPa interval the individual well water yield and, the m of unit
3;
X----hypothesis modification scheme high and low pressure system dividing point, units MPa;
The minimum useful work computational methods of each hypothesis dividing point waterflood project high-low pressure part output are:
Wg= Qg（x）×13.5
Wd= Qd（x）×x
Wy= Wg+ Wd
Wherein: Wg represents that system rises to 13.5MPa institute work, the J of unit to the high-pressure section water yield
Wd represents that system rises to x institute work, the J of unit to the low-pressure section water yield
Wy represents the minimum useful work of water-injection station output, the J of unit.
3. the method that reasonable dividing point is established in a kind of water-injection station dividing potential drop transformation according to claim 1, is characterized in that: in the water-injection station of each hypothesis Partial pressure water injection scheme, unit efficiency is to calculate by simulating two pump efficiency curve maps in any discharge capacity situation;
According to the current each model centrifugal pump discharge capacity-pump efficiency of domestic current production corresponding relation, simulate pump efficiency curve map in two any discharge capacity situations (the upper and lower pumpage-pump efficiency of DF160 corresponding relation changes greatly);
Below DF160: y=18.41ln (x)+24.03,
More than DF160: y=0.217x+74.91
Wherein: y representation theory pump efficiency
X represents pumpage (x is any discharge capacity in 0～500 scope)
According to two matched curves, suppose that certain dividing point pumpage demand is Am
3(A>500), two pumps discharge capacity is respectively Zm
3and Ym
3can obtain following relation: Z+Y=A (Z, Y≤500), two pumps pump efficiency is: ∮=[(18.41ln (Z)+24.03] × Z+ (0.217Y+74.91) × Y}/A, or ∮=[(18.41ln (Z)+24.03] × Z+[(18.41ln (Y)+24.03] × Y}/A
Wherein: ∮ represents the theoretical displacement after different pump type combinations
Z, Y represent respectively the discharge capacity of two pumps.
4. the method that reasonable dividing point is established in a kind of water-injection station dividing potential drop transformation according to claim 1, is characterized in that: the energy consumption of each hypothesis dividing point Partial pressure water injection scheme water-injection station calculates by the following method;
The total energy consumption that calculates each hypothesis dividing point water-injection station is the input work of motor:
N=Wy/∮(x)
Wherein: N is water-injection station total energy consumption, the J of unit
Wy exports minimum useful work, the J of unit for calculating gained water-injection station before
∮ (x) is the unit efficiency of hypothesis dividing point x
By calculating each hypothesis dividing point water-injection station total energy consumption
Each hypothesis dividing point total energy consumption is multiplied by water-injection station standard mark consumption and obtains its power consumption:
q=N×0.2697 kW·h / m
3MPa；
Wherein: q is power consumption, the kWh of unit
N is water-injection station total energy consumption, the J of unit
0.2697kWh/ m
3mPa is for calculating gained standard mark consumption
In the time that hypothesis dividing point is 10.0MPa, 11MPa, power consumption is relatively low, is respectively 76789 kWh/ days, 77036kWh/ days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410173554.1A CN104060973B (en) | 2014-04-28 | 2014-04-28 | The method that reasonable dividing point is established in the transformation of water-injection station dividing potential drop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410173554.1A CN104060973B (en) | 2014-04-28 | 2014-04-28 | The method that reasonable dividing point is established in the transformation of water-injection station dividing potential drop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104060973A true CN104060973A (en) | 2014-09-24 |
| CN104060973B CN104060973B (en) | 2016-07-06 |
Family
ID=51548882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410173554.1A Active CN104060973B (en) | 2014-04-28 | 2014-04-28 | The method that reasonable dividing point is established in the transformation of water-injection station dividing potential drop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104060973B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832131A (en) * | 2015-01-30 | 2015-08-12 | 燕山大学 | Method for selecting optimum oil collecting parameters based on whole mechanical production and oil collecting systems |
| CN112836358A (en) * | 2021-01-18 | 2021-05-25 | 西安石油大学 | Method for judging optimal operation mode of large-scale oil field water injection pipe network |
| CN112922569A (en) * | 2021-02-07 | 2021-06-08 | 西安石油大学 | Method for determining optimal operation state of pressurization and partial pressure mode of oil field water injection pipe network |
| CN114517667A (en) * | 2020-11-18 | 2022-05-20 | 中国石油天然气股份有限公司 | Water injection method and device for water injection well group |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2743537Y (en) * | 2004-12-03 | 2005-11-30 | 西安长庆科技工程有限责任公司 | Oil field ground engineering quality divided water flooding and pressure divided water flooding valve control device |
| CN2926498Y (en) * | 2006-05-01 | 2007-07-25 | 大庆高新区隆迪石化科技有限公司 | Partial-pressure water filler of injection focusing system |
| CN101624906A (en) * | 2009-05-20 | 2010-01-13 | 边威 | Passive pressure increasing and decreasing water distribution method |
| CN201763306U (en) * | 2010-08-16 | 2011-03-16 | 新乡市夏烽电器有限公司 | Oil filed water injection pump station energy conservation system |
| US20110220354A1 (en) * | 2008-09-17 | 2011-09-15 | Schlumberger Norge As | Polymer gels as flow improvers in water injection systems |
| WO2011135466A1 (en) * | 2010-04-30 | 2011-11-03 | Schlumberger Canada Limited | System and method for determining the effect of water-based additives on oil recovery |
| CN103104224A (en) * | 2011-11-11 | 2013-05-15 | 刘旭 | Water distribution system applied to oilfield exploitation |
| CN103174405A (en) * | 2013-03-15 | 2013-06-26 | 中国石油天然气股份有限公司 | System and method for increasing injection to under-injection wells in oil field |
-
2014
- 2014-04-28 CN CN201410173554.1A patent/CN104060973B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2743537Y (en) * | 2004-12-03 | 2005-11-30 | 西安长庆科技工程有限责任公司 | Oil field ground engineering quality divided water flooding and pressure divided water flooding valve control device |
| CN2926498Y (en) * | 2006-05-01 | 2007-07-25 | 大庆高新区隆迪石化科技有限公司 | Partial-pressure water filler of injection focusing system |
| US20110220354A1 (en) * | 2008-09-17 | 2011-09-15 | Schlumberger Norge As | Polymer gels as flow improvers in water injection systems |
| CN101624906A (en) * | 2009-05-20 | 2010-01-13 | 边威 | Passive pressure increasing and decreasing water distribution method |
| WO2011135466A1 (en) * | 2010-04-30 | 2011-11-03 | Schlumberger Canada Limited | System and method for determining the effect of water-based additives on oil recovery |
| CN201763306U (en) * | 2010-08-16 | 2011-03-16 | 新乡市夏烽电器有限公司 | Oil filed water injection pump station energy conservation system |
| CN103104224A (en) * | 2011-11-11 | 2013-05-15 | 刘旭 | Water distribution system applied to oilfield exploitation |
| CN103174405A (en) * | 2013-03-15 | 2013-06-26 | 中国石油天然气股份有限公司 | System and method for increasing injection to under-injection wells in oil field |
Non-Patent Citations (2)
| Title |
|---|
| 李荣朵 等: "油田注水系统效率优化与研究", 《石油石化节能》 * |
| 许德禹 等: "分压注水技术的应用", 《中国设备工程》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832131A (en) * | 2015-01-30 | 2015-08-12 | 燕山大学 | Method for selecting optimum oil collecting parameters based on whole mechanical production and oil collecting systems |
| CN104832131B (en) * | 2015-01-30 | 2017-04-12 | 燕山大学 | Method for selecting optimum oil collecting parameters based on whole mechanical production and oil collecting systems |
| CN114517667A (en) * | 2020-11-18 | 2022-05-20 | 中国石油天然气股份有限公司 | Water injection method and device for water injection well group |
| CN114517667B (en) * | 2020-11-18 | 2024-05-28 | 中国石油天然气股份有限公司 | Water injection method and device for water injection well group |
| CN112836358A (en) * | 2021-01-18 | 2021-05-25 | 西安石油大学 | Method for judging optimal operation mode of large-scale oil field water injection pipe network |
| CN112836358B (en) * | 2021-01-18 | 2022-06-21 | 西安石油大学 | Method for judging optimal operation mode of large-scale oil field water injection pipe network |
| CN112922569A (en) * | 2021-02-07 | 2021-06-08 | 西安石油大学 | Method for determining optimal operation state of pressurization and partial pressure mode of oil field water injection pipe network |
| CN112922569B (en) * | 2021-02-07 | 2022-06-21 | 西安石油大学 | Method for determining optimal operation state of pressurization and partial pressure mode of oil field water injection pipe network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104060973B (en) | 2016-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Schallenberg-Rodríguez et al. | Energy efficiency and desalination in the Canary Islands | |
| CN105068567B (en) | Water supply network based on water tank is regulated and stored method | |
| CN104060973A (en) | Method for setting reasonable partial pressure points in partial pressure reconstruction of water injection station | |
| CN105888633B (en) | Seperated layer water injection interval determines method with fluence | |
| Kljajić et al. | Shallow geothermal energy integration in district heating system: An example from Serbia | |
| CN110821456B (en) | Simplified method for calculating reasonable energy consumption of oilfield flooding system | |
| CN108278104B (en) | Oil well interval pumping method for low-permeability oil field | |
| Geirdal et al. | Economic comparison of a well-head geothermal power plant and a traditional one | |
| CN103912248A (en) | Method for predicting water contents of water-drive oilfields | |
| CN106661936A (en) | Hydraulic geofracture energy storage system with desalinazation | |
| Moreno et al. | Optimization of underground water pumping | |
| CN104612979A (en) | Secondary model selection and energy conservation method for pumps | |
| CN110348176B (en) | Shale gas ground gathering and transportation pipe network rolling development scheme optimization solver and method | |
| CN104504455A (en) | Method for long-term optimal scheduling of hydropower station group under cascade energy storage control | |
| CN103412483A (en) | Model-free gradient optimization control method for offshore platform injection and production and simulating device for offshore platform injection and production | |
| CN107861921A (en) | A kind of Calculation Method of Energy Consumption of depleted gas reservoir gas storage ground injection and extraction system | |
| Conti et al. | Geothermal Energy Use, Country Update for Italy (2010-2015) | |
| CN103851674A (en) | Heating station system device | |
| CN202596690U (en) | Pressurized water injection device | |
| CN113435775A (en) | Method, system, equipment and storage medium for evaluating heat economy of geothermal system | |
| RU2381354C1 (en) | Oil fields development method | |
| Lu et al. | Optimization model analysis of centralized groundwater source heat pump system in heating season | |
| CN105672962A (en) | Air foam flow distribution device and method | |
| CN102287615B (en) | Method and device for reducing circulating pump lift of high-order circulating water system | |
| CN105719020A (en) | Carry-over storage year-end water storage level determining method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |