CN106910006A - A kind of pre-judging method of Shallow Heavy Oil Reservoir two phase flow screw pump lifting - Google Patents
A kind of pre-judging method of Shallow Heavy Oil Reservoir two phase flow screw pump lifting Download PDFInfo
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- CN106910006A CN106910006A CN201710034423.9A CN201710034423A CN106910006A CN 106910006 A CN106910006 A CN 106910006A CN 201710034423 A CN201710034423 A CN 201710034423A CN 106910006 A CN106910006 A CN 106910006A
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- screw pump
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0637—Strategic management or analysis, e.g. setting a goal or target of an organisation; Planning actions based on goals; Analysis or evaluation of effectiveness of goals
- G06Q10/06375—Prediction of business process outcome or impact based on a proposed change
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
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Abstract
The present invention discloses a kind of pre-judging method of Shallow Heavy Oil Reservoir two phase flow screw pump lifting, and the method is comprised the following steps：Selecting the oil well of Suitable depth carries out screw pump production, determines the oil reservoir oil well relevant parameter of production development, and screw rod pump lift is determined by oil reservoir depth, and the daily output determines lifting speed, oil well is carried out into segmentation calculating, and segment iteration calculates every section of friction loss；Every section of friction loss sue for peace and obtains total friction loss, then total friction loss and the summation of gravity crushing are obtained into linear loss；The lift of the screw pump that linear loss and step 2 are obtained is compared, if linear loss can not be lifted more than screw rod pump lift, i.e. screw pump；Conversely, screw pump can be used for lifting.Can the method be directed to that viscosity of crude is higher, gassiness, aqueous Shallow Heavy Oil Reservoir, be whether live shallow layer thick oil gives certain guidance using screw pump production development using a kind of determination methods of screw pump lifting production.
Description
Technical field
The present invention relates to a kind of pre-judging method of Shallow Heavy Oil Reservoir two phase flow screw pump lifting, belong to oilfield exploitation technology
Field.
Background technology
During Shallow Heavy Oil Reservoir production development, when crude oil is flowed into the crude oil in nearly well area, due under strata pressure
Drop, crude oil starts a large amount of degassings, and viscosity of crude begins to ramp up；Stratum energy is caused to be not enough to lifting crude oil to well head, it is such
In the case of pumping would generally be taken to draw crude oil.The remarkable performance advantage of screw pump：Pump efficiency is high, reduces investment outlay, and ground installation is simple,
Pollution-free, noise is small, and the viscosity of crude scope of adaptation is wide, and the advantage such as easy to operate is generally applicable by major viscous crude fields, but its
Applicable elements have certain limitation.The viscosity of crude scope that general screw pump can be lifted is less than 8000mPas, and this is also
The limiting value that screw pump self performance can be lifted, but it is not in this way, due to the shadow of some external factors in actual conditions
Ring, it is not reach 8000mPas that screw pump lifts viscosity of crude.
When viscous crude lifting production is carried out to a bite well, it is impossible to correctly select lifting pump, increase between meeting is invisible
Workload；Screw pump is have selected, perhaps excess load delivery can destroy screw pump, so as to cause the economic loss of oil field unit.For
, it is necessary to methodology is higher to judge Crude viscosity, whether the wellblock containing solution gas and aqueous Shallow Heavy Oil Reservoir can for this
Enough produced using screw pump, carried out accurate instruction production development.
The content of the invention
To solve technical problem of the prior art, the present invention provides a kind of Shallow Heavy Oil Reservoir two phase flow screw pump lifting
Pre-judging method, the method is directed to that viscosity of crude is higher, and can gassiness, aqueous Shallow Heavy Oil Reservoir use screw pump
A kind of determination methods of production are lifted, is whether live shallow layer thick oil gives certain guidance using screw pump production development.
The present invention solves the technical scheme that is used of above-mentioned technical problem：A kind of Shallow Heavy Oil Reservoir two phase flow screw pump
The pre-judging method of lifting, the method is comprised the following steps：
Step one, the oil well of selection Suitable depth carry out screw pump production, and the wherein depth of oil well is less than or equal to 1800
Rice；
Step 2, the oil reservoir oil well relevant parameter for determining production development, and on-site measurement viscous kelvin relation and geothermal gradient；Institute
Oil reservoir oil well relevant parameter is stated to be glued including oil reservoir depth, the daily output, tubing diameter, oil pumping shank diameter, fluid density, shaft bottom crude oil
Degree；
Step 3, screw rod pump lift is determined by oil reservoir depth, the daily output determines lifting speed；
Step 4, oil well is carried out into segmentation calculating, every segment distance is calculated by oil reservoir depth gauge, then by viscous kelvin relation and
Geothermal gradient calculates every section of liquid viscosity respectively；
Step 5, every section of Reynolds number is calculated by every section of liquid viscosity and following formula, then look into Moody chart and obtain corresponding
Resistance coefficient；
In formula：Re is Reynolds number, nondimensional number；vmIt is average speed, m/s；D is oil pumping shank diameter, m；D is that oil pipe is straight
Footpath, m；ρlIt is fluid density, kg/m3；μlIt is liquid viscosity, mPas；
Step 6, the resistance coefficient and following formula that are obtained by above-mentioned steps calculate every section of friction loss；
In formula：It is the effective density of mixture, kg/m3；λ is resistance coefficient, nondimensional number；QoIt is crude output, m3/
s；D is tubing diameter, m；GtIt is with production 1m3The profit gross mass of degassed crude output, kg/m3；QoGtIt is total mass flow rate,
kg/s；
Step 7, by every section of friction loss sue for peace obtains total friction loss, then obtains oil density, local
With the inclination angle on stratum during gravity acceleration value and oilwell drilling, be calculated gravity crushing, by total friction loss and
The summation of gravity crushing obtains linear loss；
Step 8, the lift of the screw pump for obtaining linear loss and step 2 are compared, if linear loss is more than spiral shell
Bar pump lift, i.e. screw pump can not be lifted；Conversely, screw pump can be used for lifting.
Beneficial effects of the present invention：The method is directed to that viscosity of crude is higher, gassiness, aqueous Shallow Heavy Oil Reservoir,
Can be whether live shallow layer thick oil is given using screw pump production development using a kind of determination methods of screw pump lifting production
Certain guidance.
Brief description of the drawings
Fig. 1 is the viscous kelvin relation curve map in embodiment 1.
Specific embodiment
A kind of pre-judging method of Shallow Heavy Oil Reservoir two phase flow screw pump lifting of the invention, the method includes following step
Suddenly：
Step one, the oil well of selection Suitable depth carry out screw pump production, and the wherein depth of oil well is less than or equal to 1800
Rice；Oil well because of well depth more than 1800m should not carry out oil pumping production using screw pump；
Step 2, the oil reservoir oil well relevant parameter for determining production development, and on-site measurement viscous kelvin relation and geothermal gradient；Institute
Oil reservoir oil well relevant parameter is stated to be glued including oil reservoir depth, the daily output, tubing diameter, oil pumping shank diameter, fluid density, shaft bottom crude oil
Degree；
Step 3, screw rod pump lift is determined by oil reservoir depth, the daily output determines lifting speed；Wherein oil reservoir depth can be counted
Calculate the lift of screw pump, such as 1600 meters of lift is 16MPA, its daily output, tubing diameter, oil pumping shank diameter can be by pipe stream
Lifting general formula (flow/pipeline cross-sectional area is exactly linear velocity) determine lifting speed；
Step 4, oil well is carried out into segmentation calculating, every segment distance is calculated by oil reservoir depth gauge, then by viscous kelvin relation and
Geothermal gradient calculates every section of liquid viscosity respectively；Due to the presence of geothermal gradient, viscosity of crude wherein in lifting process
Rise with the decline of temperature, increased flowing frictional resistance, it is necessary to consider formation temperature influence, introduce crude oil viscous kelvin relation and
Geothermal gradient, i.e., calculate friction loss with segmentation, and the average value that viscosity is taken in each segment distance carries out calculating；
Step 5, every section of Reynolds number is calculated by every section of liquid viscosity and following formula, then look into Moody chart and obtain corresponding
Resistance coefficient；
In formula：Re is Reynolds number, nondimensional number；vmIt is average speed, m/s；D is oil pumping shank diameter, m；D is that oil pipe is straight
Footpath, m；ρlIt is fluid density, kg/m3；μlIt is liquid viscosity, mPas；
Average speed vmThe lifting speed that as step 3 determines；
Wherein Moody chart such as table 1：
Table 1：The corresponding relation of Reynolds number and resistance coefficient
Step 6, the resistance coefficient and following formula that are obtained by above-mentioned steps are calculated every section of friction pressure gradient, then obtained
Every section of friction loss；It is gassiness in oil reservoir oil-producing, aqueous due to being two phase flow lifting, therefore use Hagedorn-Brown side
Method, the formula of seeing below carries out the calculating of friction drag and obtains relevant parameter：
In formula：It is the effective density of mixture, kg/m3；λ is resistance coefficient, nondimensional number；QoIt is crude output, m3/
s；D is tubing diameter, m；GtIt is with production 1m3The profit gross mass of degassed crude output, kg/m3；QoGtIt is total mass flow rate,
kg/s；
The mean flow rate of liquid phase is the lifting speed of step 3 determination；
Step 7, by every section of friction loss sue for peace obtains total friction loss, then obtains oil density, local
With the inclination angle on stratum during gravity acceleration value and oilwell drilling, gravity crushing is calculated, then by total friction loss
Linear loss is obtained with the summation of gravity crushing；
Wherein, screw pump lifts the linear loss pressure drop of viscous crude process, sees below formula, and gravity is broadly divided into along journey droop loss
Loss ρLiquidG sin θs, friction lossAcceleration lossesThree parts；
Three part droop loss are analyzed, because its screw pump lifting process is at the uniform velocity process, the change of acceleration
Change amount can be ignored substantially, so basic linear loss is from friction loss and gravity losses composition, such as following formula；
Step 8, the lift of the screw pump for obtaining linear loss and step 2 are compared, if linear loss is more than spiral shell
Bar pump lift, i.e. screw pump can not be lifted；Conversely, screw pump can be used for lifting.
It is more preferably accurate in order to calculate, it is preferred embodiment that described every section depth is 100 meters.
Specific embodiment of the invention is further described with reference to embodiment, is not therefore limited the present invention
System is among described scope of embodiments.
Embodiment 1
The lifting crude oil ability judgement of screw pump is carried out by taking Xinjiang Oilfield block well as an example,
S100, the oil reservoir depth of the wellblock are 1700m, in the range of the lifting of conventional screw pump, then carry out screw pump production,
Water ratio in oil well is 0%；
S200, the oil reservoir oil well relevant parameter (such as table 2) for determining production development, and the viscous kelvin relation of on-site measurement and ground temperature ladder
Degree；
Table 2
S300, daily output 3m3/ d can determine that lifting speed is 0.0176m/s, and oil reservoir depth can determine screw rod
The lift 17MPA of pump；
S400, oil well is carried out into segmentation calculating, by viscosity of crude according to oil reservoir depth and the relation of viscosity of crude, per 100m
A segmentation is done, an average value for viscosity of crude is done per 100m, the viscosity of crude in different well depth stages is pressed into gradient calculation, then
Every section of viscosity is determined according to the viscous kelvin relation of on-site measurement and geothermal gradient；
S500, the Reynolds number (result such as table 3) that every section is calculated by every section of viscosity and following formula；
In formula：Re is Reynolds number, nondimensional number；vmIt is average speed, m/s；D is oil pumping shank diameter, m；D is that oil pipe is straight
Footpath, m；ρlIt is fluid density, kg/m3；μlIt is liquid viscosity, mPas；
Table 3
S600, Moody chart is looked into again obtain corresponding resistance coefficient；Can be with by the Reynolds number of table 1 and frictional resistance corresponding relation
Find out and belong to laminar flow, the resistance coefficient and following formula that are obtained by above-mentioned steps calculate every section of friction loss (result such as table 4)；
In formula：It is the effective density of mixture, kg/m3；λ is resistance coefficient, nondimensional number；QoIt is crude output, m3/
s；D is tubing diameter, m；GtIt is with production 1m3The profit gross mass of degassed crude output, kg/m3；QoGtIt is total mass flow rate,
kg/s；
Table 4
| Average computation depth m | Re | λ | Friction loss, MPa |
| 50 | 0.441821 | 144.855 | 0.064012 |
| 150 | 0.493417 | 129.7077 | 0.057318 |
| 250 | 0.554126 | 115.4972 | 0.051039 |
| 350 | 0.626079 | 102.2235 | 0.045173 |
| 450 | 0.712007 | 89.8867 | 0.039721 |
| 550 | 0.815425 | 78.48672 | 0.034684 |
| 650 | 0.94085 | 68.02358 | 0.03006 |
| 750 | 1.094068 | 58.49727 | 0.02585 |
| 850 | 1.282365 | 49.9078 | 0.022054 |
| 950 | 1.514608 | 42.25516 | 0.018673 |
| 1050 | 1.80082 | 35.53937 | 0.015705 |
| 1150 | 2.150508 | 29.76041 | 0.013151 |
| 1250 | 2.568395 | 24.91829 | 0.011011 |
| 1350 | 3.045733 | 21.01301 | 0.009286 |
| 1450 | 3.546775 | 18.04456 | 0.007974 |
| 1550 | 3.996764 | 16.01295 | 0.007076 |
| 1650 | 4.290067 | 14.91818 | 0.006592 |
S700, by every section of friction loss sue for peace obtains total friction loss, it can be seen from Table 4 that：Total rubs
Resistance loss=every section friction loss and=0.46MPa；Oil density, local gravity acceleration value and oil well are obtained again
With the inclination angle on stratum in drilling process, gravity crushing is calculated；Again because along journey droop loss=friction loss+gravity losses+
Acceleration losses, because its screw pump lifting process is at the uniform velocity process, the variable quantity of acceleration can be ignored substantially, so substantially
Linear loss is constituted from friction loss and gravity losses；So linear loss=friction loss+gravity losses+acceleration is damaged
Mistake=15.98MPa；
The linear loss that S800, the lift 17MPA of the screw pump that step S200 is obtained and step S700 are calculated
15.98MPa is judged that the lift 17MPA of screw pump is more than linear loss 15.98MPa, then screw rod pump lift can be to meet
The linear loss, can lift.
Claims (1)
1. the pre-judging method that a kind of Shallow Heavy Oil Reservoir two phase flow screw pump is lifted, it is characterised in that the method includes following step
Suddenly：
Step one, the oil well of selection Suitable depth carry out screw pump production, and the wherein depth of oil well is less than or equal to 1800 meters；
Step 2, the oil reservoir oil well relevant parameter for determining production development, and on-site measurement viscous kelvin relation and geothermal gradient；The oil
Hiding oil well relevant parameter includes oil reservoir depth, the daily output, tubing diameter, oil pumping shank diameter, fluid density, shaft bottom viscosity of crude；
Step 3, screw rod pump lift is determined by oil reservoir depth, the daily output determines lifting speed；
Step 4, oil well is carried out into segmentation calculating, every segment distance is calculated by oil reservoir depth gauge, then by gluing kelvin relation and ground temperature
Gradient calculates every section of liquid viscosity respectively；
Step 5, every section of Reynolds number is calculated by every section of liquid viscosity and following formula, then look into Moody chart and obtain corresponding resistance
Force coefficient；
In formula：Re is Reynolds number, nondimensional number；vmIt is average speed, m/s；D is oil pumping shank diameter, m；D is tubing diameter, m；ρl
It is fluid density, kg/m3；μlIt is liquid viscosity, mPas；
Step 6, the resistance coefficient and following formula that are obtained by above-mentioned steps calculate every section of friction loss；
In formula：It is the effective density of mixture, kg/m3；λ is resistance coefficient, nondimensional number；QoIt is crude output, m3/s；D is
Tubing diameter, m；GtIt is with production 1m3The profit gross mass of degassed crude output, kg/m3；QoGtIt is total mass flow rate, kg/s；
Step 7, by every section of friction loss sue for peace obtains total friction loss, then obtains oil density, local gravity
With the inclination angle on stratum during acceleration magnitude and oilwell drilling, gravity crushing is calculated, by total friction loss and gravity
Crushing summation obtains linear loss；
Step 8, the lift of the screw pump for obtaining linear loss and step 2 are compared, if linear loss is more than screw pump
Lift, i.e. screw pump can not be lifted；Conversely, screw pump can be used for lifting.
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| CN201710034423.9A CN106910006A (en) | 2017-01-17 | 2017-01-17 | A kind of pre-judging method of Shallow Heavy Oil Reservoir two phase flow screw pump lifting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113420389A (en) * | 2021-06-30 | 2021-09-21 | 北京市地质工程勘察院 | Design method of open type heat exchange inner tube pump chamber section of geothermal well |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1245243A (en) * | 1999-07-15 | 2000-02-23 | 江苏石油勘探局石油工程技术研究院 | Parameters design method for mechanically oil-producing technology with rod pump. |
| CN103353908A (en) * | 2013-06-20 | 2013-10-16 | 江苏大学 | Accurate computing method used for pipeline resistance coefficient and based on numerical computation |
| CN104778881A (en) * | 2015-03-27 | 2015-07-15 | 浙江大学 | Throttling type bistable on-way resistance experiment instrument and method thereof |
-
2017
- 2017-01-17 CN CN201710034423.9A patent/CN106910006A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1245243A (en) * | 1999-07-15 | 2000-02-23 | 江苏石油勘探局石油工程技术研究院 | Parameters design method for mechanically oil-producing technology with rod pump. |
| CN103353908A (en) * | 2013-06-20 | 2013-10-16 | 江苏大学 | Accurate computing method used for pipeline resistance coefficient and based on numerical computation |
| CN104778881A (en) * | 2015-03-27 | 2015-07-15 | 浙江大学 | Throttling type bistable on-way resistance experiment instrument and method thereof |
Non-Patent Citations (1)
| Title |
|---|
| GUNASHI1998: "第5章 垂直气液两相流压力梯度计算", 《豆丁建筑网》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113420389A (en) * | 2021-06-30 | 2021-09-21 | 北京市地质工程勘察院 | Design method of open type heat exchange inner tube pump chamber section of geothermal well |
| CN113420389B (en) * | 2021-06-30 | 2023-07-28 | 北京市地质工程勘察院 | Design method of open type heat exchange inner pipe pump chamber section of geothermal well |
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Application publication date: 20170630 |