CN105422084B - A kind of the Wellbore Temperature Field acquisition methods and device of hot water circulation heated viscosity reduction technique - Google Patents

A kind of the Wellbore Temperature Field acquisition methods and device of hot water circulation heated viscosity reduction technique Download PDF

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CN105422084B
CN105422084B CN201510837567.9A CN201510837567A CN105422084B CN 105422084 B CN105422084 B CN 105422084B CN 201510837567 A CN201510837567 A CN 201510837567A CN 105422084 B CN105422084 B CN 105422084B
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temperature
wall
thermal resistance
inner tube
convection current
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CN105422084A (en
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马振
孙守国
孙振宇
曲绍刚
王智博
杨宝春
刘锦
张成博
宋阳
姜佳悦
刘洪芹
方梁锋
王河
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China Petroleum and Natural Gas Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure
    • E21B47/07—Temperature
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20—Displacing by water

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Abstract

The present invention relates to a kind of Wellbore Temperature Field acquisition methods of hot water circulation heated viscosity reduction technique and devices, wherein method includes：Determine data parameters；Thermal resistance is obtained using the data parameters, cement sheath thermal resistance, casing wall thermal resistance, thermal convection current liquid thermal resistance between liquid and internal surface of sleeve pipe, thermal convection current thermal resistance between air and internal surface of sleeve pipe, heat transfer thermal resistance between oil pipe inside and outside wall, thermal convection current thermal resistance between crude oil and tube inner wall, thermal convection current thermal resistance between hollow stem inside and outside wall, thermal convection current thermal resistance between hot fluid and hollow stem inner wall, thermal convection current thermal resistance between inner tube inside and outside wall and the thermal convection current thermal resistance between hot fluid and inner tube；The pit shaft unit radial heat loss of unit length is determined using thermal resistance information；Inner tube hot water temperature, hollow stem hot water temperature and crude oil in oil pipe temperature field in the case of determining positive injection using the pit shaft unit radial heat loss of unit length and/or instead noting.

Description

A kind of the Wellbore Temperature Field acquisition methods and device of hot water circulation heated viscosity reduction technique
Technical field
The present invention relates to viscous crude Lifting Technique field, more particularly to a kind of temperature in wellbore of hot water circulation heated viscosity reduction technique Field acquisition methods and device.
Background technology
Electric-heating technology is that cable is heated in tripping in hollow rod, makes hollow rod and heating cable composition collection skin Effect calandria makes the DP technology technology of crude oil viscosity reduction in pit shaft using kelvin effect principle of heating.Electric-heating technology with The features such as its floor control is simple, the easy to maintain and thermal efficiency is high plays significantly work in each heavy oil block production in oil recovery factory With being one of the main technique of heavy oil block viscosity reducing.
With the Persisting exploitation of heavy oil block, high energy consumption issues day caused by large-scale application electrical heating viscosity reducing technology Benefit is prominent, and larger pressure is brought to the operation of oil recovery production of units and cost control.Double hollow pole technologies are developed recentlies One novel viscosity reduction technology, as shown in Figure 1, the operation principle of the technology is divided into two different situations：(1) positive injection：Well head heat Water enters double hollow pipe inner and outer pipes spaces into hot water thermal insulating hose by ground and flows to underground, to underground using in double hollow pipes Pipe returns to ground, then heat-preserving hose enters flow line and produced liquid in oil well enters measuring station together by being discharged.(2) anti- Note：Well head hot water is entered into hot water thermal insulating hose among double hollow pipe inner tubes by ground flows to underground, to underground using double Inside and outside hollow pipe tube space return to ground, then by be discharged heat-preserving hose enter flow line and produced liquid in oil well together into To measuring station.
The core tubular column structure of double layer hollow sucker rod hot water circulation heated viscosity reduction technique is made of inside and outside two layers of pipe, outside Pipe is 42mm hollow stems, and inner tube is the coiled tubing of 24 or 19mm, as shown in Figure 1.Hollow stem is general by connecing one section under sucker rod Logical solid sucker rod, solid sucker rod are taken over a job plug again, and power is provided for oil well pump.Under hollow stem it is complete after fill water, pressure testing is qualified The tripping in minor diameter coiled tubing among hollow stem afterwards reserves 2~3m on well head after complete under oil pipe and connects water mixing pipeline, hollow light Water mixing threeway is terminated on bar, oil pipe forms annular space with hollow inside pipe wall.By taking counter note as an example, shape between oil pipe and annular space At water mixing circuit, water mixing enters from oil pipe, is flowed out from annular space, and oil pipe can be insulating tube (2.5mm insulating layers), and hot water is logical It is seldom to cross thermal loss during oil pipe enters underground.Hollow stem is heat carrier, and hot water is flowing through annular space return ground During heat be transmitted to oil reservoir by hollow stem produce liquid, viscosity reduces after production liquid is heated, to be conducive to the extraction of crude oil It is defeated with collecting.Hot water provides heat source by ground heating furnace, can be adjusted and be added at any time according to oil well production situation and water mixing out temperature Hot temperature and mix flow velocity.
One of the key of double layer hollow sucker rod hot water circulation heated viscosity reduction technology is to determine the hot water incorporation of well head Discharge capacity and temperature.This two parameter index, which is mainly varied with temperature by viscosity of crude, to be influenced.Therefore, to determine that rational well head is mixed Enter discharge capacity and temperature, must just study the distribution in the temperature field in the wellbore, pressure field of crude oil.By inquiring lot of documents, money Material, there is no similar computational methods at present, thus can not Accurate Prediction go out double layer hollow sucker rod hot water circulation heated viscosity reduction work The key parameter of skill.
Invention content
To solve problem of the prior art, the present invention proposes that a kind of Wellbore Temperature Field of hot water circulation heated viscosity reduction technique obtains Take method and device, can Accurate Prediction go out the key parameter of double layer hollow sucker rod hot water circulation heated viscosity reduction technique.
To achieve the above object, the present invention provides a kind of Wellbore Temperature Field acquisition sides of hot water circulation heated viscosity reduction technique Method, including：
Determine data parameters；
Thermal resistance R is obtained using the data parameters1, cement sheath thermal resistance R2, casing wall thermal resistance R3, in liquid and casing Thermal convection current liquid thermal resistance R between wall4, thermal convection current thermal resistance R between air and internal surface of sleeve pipe5, the heat between oil pipe inside and outside wall passes Heat conduction hinders R6, thermal convection current thermal resistance R between crude oil and tube inner wall7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, hot-fluid Thermal convection current thermal resistance R between body and hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10With hot fluid and inner tube it Between thermal convection current thermal resistance R11；
The pit shaft unit radial heat loss Q of unit length is determined using thermal resistance information；
Since well head, in anti-note, calculated under inner tube pit shaft unit using the pit shaft unit radial heat loss Q The temperature value at end determines the temperature field of entire inner tube using the temperature value of inner tube pit shaft unit lower end；Using hot fluid with it is hollow Thermal convection current thermal resistance R between bar inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10, the heat between hot fluid and inner tube it is right Flow thermal resistance R11Temperature, the temperature of hollow stem inner wall of outer wall of inner tube are obtained with pit shaft unit radial heat loss Q；Utilize said inner tube The temperature of outer wall determines the temperature field of outer wall of inner tube, and the temperature of hollow stem inner wall is determined using the temperature of the hollow stem inner wall ；The temperature of inner tube and hollow stem annular space is obtained using the temperature of outer wall of inner tube, the temperature of hollow stem inner wall；Utilize inner tube and sky The temperature of core bar annular space determines the temperature field of inner tube and hollow stem annular space；Utilize pit shaft unit radial heat loss Q, oil pipe inside and outside wall Between heat transfer thermal resistance R6, thermal convection current thermal resistance R between crude oil and tube inner wall7, thermal convection current heat between hollow stem inside and outside wall Hinder R8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10And hot-fluid Thermal convection current thermal resistance R between body and inner tube11Determine tube inner wall temperature, oil-pipe external wall temperature；It is true using tube inner wall temperature value Jet tube inner wall temperature field determines oil-pipe external wall temperature field using oil-pipe external wall temperature value；Outside using tube inner wall temperature, oil pipe Wall temperature determines the initial crude oil temperature in outer oil pipe shaft bottom inlet；Utilize the initial crude oil temperature in outer oil pipe inlet and original The mass velocity of oily specific heat capacity and crude oil determines the thermo parameters method of crude oil in outer oil pipe.
Preferably, the data parameters include：Well head injects the discharge capacity and temperature of hot water；Cement thermal coefficient；Wellbore half Diameter；Inner tube internal-and external diameter；Hollow stem internal-and external diameter；Depth；Oil pipe internal-and external diameter；Oil pipe thermal coefficient；Casing thermal coefficient；In casing Diameter；Sleeve outer；Wellbore fluid moisture content；Crude oil thermal coefficient；The thermal coefficient of water；Relative oil density；Stratum heat conduction system Number；Surface temperature；Geothermal gradient.
Preferably, the expression formula of the pit shaft unit radial heat loss Q is：
Wherein, TsFor inner tube hot water temperature, TeIndicate that near-bottom temperature, R are pit shaft unit radial entire thermal resistance, pit shaft unit diameter In two kinds of situation to entire thermal resistance, the first is in positive injection, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；Another kind is noted counter In the case of, R=R1+R2+R3+R4+R5+R6+R7+R8+R9+R10+R11。
Preferably, the expression formula of the temperature of said inner tube is：
CmTs- Q/1000=CmTs'
Wherein, Ts' indicate the temperature after the variation of inner tube hot water；C indicates the specific heat capacity of water；M indicates the mass flow of hot water； TsFor inner tube hot water temperature；
The expression formula of the temperature of said inner tube outer wall is：
Tn_to=Ts-(R10+R11)Q/dl
Wherein, Tn_toIndicate the temperature of outer wall of inner tube, TsFor inner tube hot water temperature；R10Indicate the heat between inner tube inside and outside wall Thermal-convection resistance, R11Indicate the thermal convection current thermal resistance between hot fluid and inner tube；
The expression formula of the temperature of the hollow stem inner wall is：
Ti=Ts-(R9+R10+R11)Q/dl
Wherein, TsFor inner tube hot water temperature, R9Thermal convection current thermal resistance between hot fluid and hollow stem inner wall, R10For inner tube Thermal convection current thermal resistance between inside and outside wall, R11Thermal convection current thermal resistance between hot fluid and inner tube；TiIndicate the temperature of hollow stem inner wall Degree；
The expression formula of said inner tube and the temperature of hollow stem annular space is：
Wherein, THIndicate the temperature of inner tube and hollow stem annular space；
The expression formula of the tube inner wall temperature is：
Tti=Ts-(R7+R8+R9+R10+R11)Q/dl
Wherein, TtiIndicate tube inner wall temperature；
The expression formula in the oil-pipe external wall temperature field is：
Tto=Ts-(R6+R7+R8+R9+R10+R11)Q/dl
The expression formula of the initial crude oil temperature in oil pipe inlet is：
Wherein, TuIndicate the initial crude oil temperature in oil pipe inlet；
The expression formula in the wellbore oil temperature field is：
Wherein, Tu' indicate wellbore oil temperature field；C2Indicate the specific heat capacity of crude oil, C2=4.2 × fw+2.2×(1-fw)； m2Indicate the mass velocity of crude oil,Q indicates Liquid output；γoIndicate oil density.
Accordingly, for achieving the above object, the present invention also proposes a kind of pit shaft of hot water circulation heated viscosity reduction technique Temperature field acquisition device, including：
First parameter determination unit, for determining data parameters；
Second parameter determination unit, the data parameters for being determined using first parameter determination unit obtain stratum heat Hinder R1, cement sheath thermal resistance R2, casing wall thermal resistance R3, thermal convection current liquid thermal resistance R between liquid and internal surface of sleeve pipe4, air and casing Thermal convection current thermal resistance R between inner wall5, heat transfer thermal resistance R between oil pipe inside and outside wall6, thermal convection current between crude oil and tube inner wall Thermal resistance R7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, it is interior Thermal convection current thermal resistance R between pipe inside and outside wall10Thermal convection current thermal resistance R between hot fluid and inner tube11；
Pit shaft unit radial heat loss determination unit, the pit shaft unit radial for determining unit length using thermal resistance information Heat loss Q；
Anti- note unit, for since well head, in anti-note, being calculated using the pit shaft unit radial heat loss Q The temperature value of inner tube pit shaft unit lower end determines the temperature field of entire inner tube using the temperature value of inner tube pit shaft unit lower end；Profit With the thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10, hot fluid with Thermal convection current thermal resistance R between inner tube11Temperature, the temperature of hollow stem inner wall of outer wall of inner tube are obtained with pit shaft unit radial heat loss Q Degree；The temperature field that outer wall of inner tube is determined using the temperature of said inner tube outer wall is determined empty using the temperature of the hollow stem inner wall The temperature field of core bar inner wall；The temperature of inner tube and hollow stem annular space is obtained using the temperature of outer wall of inner tube, the temperature of hollow stem inner wall Degree；The temperature field of inner tube and hollow stem annular space is determined using the temperature of inner tube and hollow stem annular space；Utilize pit shaft unit radial heat Lose the heat transfer thermal resistance R between Q, oil pipe inside and outside wall6, thermal convection current thermal resistance R between crude oil and tube inner wall7, inside and outside hollow stem Thermal convection current thermal resistance R between wall8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, the heat between inner tube inside and outside wall it is right Flow thermal resistance R10Thermal convection current thermal resistance R between hot fluid and inner tube11Determine tube inner wall temperature, oil-pipe external wall temperature；Utilize oil Inside pipe wall temperature value determines tube inner wall temperature field, and oil-pipe external wall temperature field is determined using oil-pipe external wall temperature value；Utilize oil pipe Inner wall temperature, oil-pipe external wall temperature determine the initial crude oil temperature in outer oil pipe shaft bottom inlet；It is initial using outer oil pipe inlet Crude oil temperature and the mass velocity of crude oil specific heat capacity and crude oil determine the thermo parameters method of crude oil in outer oil pipe.
For achieving the above object, the present invention also proposes that a kind of Wellbore Temperature Field of hot water circulation heated viscosity reduction technique obtains Method is taken, including：
Determine data parameters；
Thermal resistance R is obtained using the data parameters1, cement sheath thermal resistance R2, casing wall thermal resistance R3, in liquid and casing Thermal convection current liquid thermal resistance R between wall4, thermal convection current thermal resistance R between air and internal surface of sleeve pipe5, the heat between oil pipe inside and outside wall passes Heat conduction hinders R6, thermal convection current thermal resistance R between crude oil and tube inner wall7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, hot-fluid Thermal convection current thermal resistance R between body and hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10With hot fluid and inner tube it Between thermal convection current thermal resistance R11；
The pit shaft unit radial heat loss Q of unit length is determined using thermal resistance information；
Since well head, in positive injection, inner tube and hollow burr are calculated using the pit shaft unit radial heat loss Q The temperature value of empty well cylinder unit lower end, using the temperature value of inner tube and hollow stem annulus wellbore unit lower end determine entire inner tube with The temperature field of hollow stem annular space；From the bottom hole temperature (BHT) for obtaining inner tube in the temperature field of entire inner tube and hollow stem annular space；Using interior The bottom hole temperature (BHT) of pipe determines inner pipe sections radial direction heat loss；It is determined using the bottom hole temperature (BHT) of inner pipe sections radial direction heat loss and inner tube The temperature of inner tube；The temperature field of inner tube is determined using the temperature of inner tube；Utilize pit shaft unit radial heat loss Q, oil pipe inside and outside wall Between heat transfer thermal resistance R6, thermal convection current thermal resistance R between crude oil and tube inner wall7, thermal convection current heat between hollow stem inside and outside wall Hinder R8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9Determine tube inner wall temperature, oil-pipe external wall temperature；Utilize oil Inside pipe wall temperature determines tube inner wall temperature field, and oil-pipe external wall temperature field is determined using oil-pipe external wall temperature；Utilize tube inner wall Temperature, oil-pipe external wall temperature determine the initial crude oil temperature in outer oil pipe shaft bottom inlet, utilize the initial original in outer oil pipe inlet Oil temperature determines wellbore oil thermo parameters method.
Preferably, the data parameters include：Well head injects the discharge capacity and temperature of hot water；Cement thermal coefficient；Wellbore half Diameter；Inner tube internal-and external diameter；Hollow stem internal-and external diameter；Depth；Oil pipe internal-and external diameter；Oil pipe thermal coefficient；Casing thermal coefficient；In casing Diameter；Sleeve outer；Wellbore fluid moisture content；Crude oil thermal coefficient；The thermal coefficient of water；Relative oil density；Stratum heat conduction system Number；Surface temperature；Geothermal gradient.
Preferably, the expression formula of the pit shaft unit radial heat loss Q is：
Wherein, TsFor inner tube hot water temperature, TeIndicate that near-bottom temperature, R are pit shaft unit radial entire thermal resistance, pit shaft unit diameter In two kinds of situation to entire thermal resistance, the first is in positive injection, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；Another kind is noted counter In the case of, R=R1+R2+R3+R4+R5+R6+R7+R8+R9+R10+R11。
Preferably, it is in positive injection, said inner tube and the temperature expression formula of hollow stem annular space：
CmTs_h(Q+Q')/1000=CmT's_h
Wherein, T 's_hIndicate inner tube and the temperature after the variation of hollow stem annular space hot water；C indicates the specific heat capacity of water；M indicates heat The mass flow of water；Ts_hFor inner tube and hollow stem annular space hot water temperature；Q' indicates inner tube hot water caloric receptivity,TeIndicate that near-bottom temperature, R are pit shaft unit radial entire thermal resistance, R=R1+ R2+R3+R4+R5+R6+R7+R8+R9；
The expression formula of the temperature of said inner tube is：
CmTs- Q/1000=CmTs'
Wherein, Ts' indicate the temperature after the variation of inner tube hot water；C indicates the specific heat capacity of water；M indicates the mass flow of hot water； TsFor inner tube hot water temperature；TeIndicate that near-bottom temperature, R are pit shaft unit radial entire thermal resistance, R=R1+R2+R3 +R4+R5+R6+R7+R8+R9+R10+R11；
The expression formula of the tube inner wall temperature is：
Tti=Ts-(R7+R8+R9)Q/dl
Wherein, TsFor inner tube hot water temperature；TtiIndicate tube inner wall temperature field；TeIndicate bottom temperature Degree, R are pit shaft unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；
The expression formula of the oil-pipe external wall temperature is：
Tto=Ts-(R6+R7+R8+R9)Q/dl
Wherein, TtoIndicate oil-pipe external wall temperature；TsFor inner tube hot water temperature；TeIndicate near-bottom temperature, R is pit shaft unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；
The expression formula of the initial crude oil temperature in outer oil pipe inlet is：
The expression formula in the wellbore oil temperature field is：
Wherein, Tu' indicate wellbore oil temperature field；TeIndicate that near-bottom temperature, R are pit shaft unit radial Entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；C2Indicate the specific heat capacity of crude oil, C2=4.2 × fw+2.2×(1-fw)；m2 Indicate the mass velocity of crude oil,Q indicates Liquid output；γoIndicate oil density.
Accordingly, the present invention also proposes a kind of Wellbore Temperature Field acquisition device of hot water circulation heated viscosity reduction technique, including：
First parameter determination unit, for determining data parameters；
Second parameter determination unit, the data parameters for being determined using first parameter determination unit obtain stratum heat Hinder R1, cement sheath thermal resistance R2, casing wall thermal resistance R3, thermal convection current liquid thermal resistance R between liquid and internal surface of sleeve pipe4, air and casing Thermal convection current thermal resistance R between inner wall5, heat transfer thermal resistance R between oil pipe inside and outside wall6, thermal convection current between crude oil and tube inner wall Thermal resistance R7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, it is interior Thermal convection current thermal resistance R between pipe inside and outside wall10Thermal convection current thermal resistance R between hot fluid and inner tube11；
Pit shaft unit radial heat loss determination unit, the pit shaft unit radial for determining unit length using thermal resistance information Heat loss Q；
Positive injection unit, for since well head, in positive injection, being calculated using the pit shaft unit radial heat loss Q The temperature value of inner tube and hollow stem annulus wellbore unit lower end utilizes the temperature value of inner tube and hollow stem annulus wellbore unit lower end Determine the temperature field of entire inner tube and hollow stem annular space；From the well for obtaining inner tube in the temperature field of entire inner tube and hollow stem annular space Bottom temperature；Inner pipe sections radial direction heat loss is determined using the bottom hole temperature (BHT) of inner tube；Utilize inner pipe sections radial direction heat loss and inner tube Bottom hole temperature (BHT) determine the temperature of inner tube；The temperature field of inner tube is determined using the temperature of inner tube；Utilize pit shaft unit radial heat waste Lose the heat transfer thermal resistance R between Q, oil pipe inside and outside wall6, thermal convection current thermal resistance R between crude oil and tube inner wall7, hollow stem inside and outside wall Between thermal convection current thermal resistance R8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9Determine tube inner wall temperature, outside oil pipe Wall temperature；Tube inner wall temperature field is determined using tube inner wall temperature, and oil-pipe external wall temperature field is determined using oil-pipe external wall temperature； The initial crude oil temperature in outer oil pipe shaft bottom inlet is determined using tube inner wall temperature, oil-pipe external wall temperature, is entered using outer oil pipe Initial crude oil temperature determines wellbore oil temperature field at mouthful.
Above-mentioned technical proposal has the advantages that：
The technical program computational methods have good computational stability and higher computational accuracy, are conciliate by the algorithm Tool is released, the discharge capacity and temperature that mix hot water to the well head of double layer hollow sucker rod hot water circulation heated viscosity reduction technique are can be very good Degree is predicted, the purpose of wellbore oil viscosity reduction is had reached.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Obtain other attached drawings according to these attached drawings.
Fig. 1 is positive injection, counter notes schematic diagram；
Fig. 2 a are a kind of Wellbore Temperature Field acquisition methods flow chart of hot water circulation heated viscosity reduction technique proposed by the present invention One of；
Fig. 2 b are a kind of Wellbore Temperature Field acquisition methods flow chart of hot water circulation heated viscosity reduction technique proposed by the present invention Two；
Fig. 3 a be a kind of Wellbore Temperature Field acquisition device block diagram of hot water circulation heated viscosity reduction technique proposed by the present invention it One；
Fig. 3 b be a kind of Wellbore Temperature Field acquisition device block diagram of hot water circulation heated viscosity reduction technique proposed by the present invention it Two；
Fig. 4 is one of the presentation design sketch of present apparatus embodiment；
Fig. 5 is the two of the presentation design sketch of present apparatus embodiment；
Fig. 6 is the three of the presentation design sketch of present apparatus embodiment；
Fig. 7 is the four of the presentation design sketch of present apparatus embodiment；
Fig. 8 is the five of the presentation design sketch of present apparatus embodiment；
Fig. 9 is the six of the presentation design sketch of present apparatus embodiment.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The operation principle of the technical program is：Not for two kinds of double layer hollow sucker rod hot water circulation heated viscosity reduction technique With the crude oil of injection mode, double layer hollow sucker rod hot water circuit is described with the foundation of the basic principles such as thermodynamics, hydrodynamics The mathematical model of temperature in wellbore field distribution, is used in combination numerical method to be solved, with understand and grasp it is mixed with hot water during inner tube, interior The Temperature Distribution and variation tendency of pipe and hollow stem annular space, pit shaft are mixed with the rational well head of Instructing manufacture practical choice The discharge capacity and temperature of hot water.
Illustrative methods
Based on above-mentioned operation principle, the present invention proposes a kind of Wellbore Temperature Field acquisition side of hot water circulation heated viscosity reduction technique Method.As shown in Figure 2 a.Method includes：
Step 201)：Determine data parameters；
In step 201, the data parameters include：Well head injects the discharge capacity and temperature of hot water；Cement thermal coefficient；Well Eye radius；Inner tube internal-and external diameter；Hollow stem internal-and external diameter；Depth；Oil pipe internal-and external diameter；Oil pipe thermal coefficient；Casing thermal coefficient；Casing Internal diameter；Sleeve outer；Wellbore fluid moisture content；Crude oil thermal coefficient；The thermal coefficient of water；Relative oil density；Stratum heat conduction Coefficient；Surface temperature；Geothermal gradient.
Step 202)：Thermal resistance R is obtained using the data parameters1, cement sheath thermal resistance R2, casing wall thermal resistance R3, liquid Thermal convection current liquid thermal resistance R between internal surface of sleeve pipe4, thermal convection current thermal resistance R between air and internal surface of sleeve pipe5, oil pipe inside and outside wall it Between heat transfer thermal resistance R6, thermal convection current thermal resistance R between crude oil and tube inner wall7, thermal convection current thermal resistance between hollow stem inside and outside wall R8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10And hot fluid Thermal convection current thermal resistance R between inner tube11；
In step 202, the data parameters obtained using step 201 determine R1~R11, basic assumption condition, which is arranged, is：
(1) pressure, temperature of well head production fluid remain unchanged；
(2) oil pipe is full of low-pressure air with the annular space that casing is formed；
(3) using inner tube center line as symmetry axis, hollow rod, outer oil pipe, casing and formation rock isotropism；
(4) thermal physical property parameter in model system is temperature independent, that is, is considered permanent physical property；
(5) prime stratum temperature is linearly distributed.
For thermal resistance R1For,
In the formula,KeFor formation thermal conductivity, unit is W/ (mK)；A is ground The average coefficient of heat transfer of layer, unit m2/d；T is oil well production time, rhIndicate wellbore radius, unit m.
For cement sheath thermal resistance R2For,
In the formula, KcemFor cement sheath thermal coefficient, unit is W/ (mK)；rcoFor sleeve outer wall radius, unit m.
For casing wall thermal resistance R3For,
In the formula, KcasIndicate that casing thermal coefficient, unit are W/ (mK)；rciIndicate that internal surface of sleeve pipe radius, unit are m。
For the thermal convection current liquid thermal resistance R between liquid and internal surface of sleeve pipe4For,
Wherein, fwIndicate liquid aqueous rate, rtoIndicate oil-pipe external wall radius, λoIndicate crude oil heat-conducting system；λo=0.1172 (1-0.00054T)/γo；γoFor relative oil density；T indicates that oil-pipe external wall temperature is added divided by 2 with internal surface of sleeve pipe temperature；λw =3.51153-0.04436 (T+273.15)+2.41233 × 10-4×(T+273.15)2-6.051×10-7×(T+273.15)3 +7.22766×10-10(T+273.15)4-3.3716×10-13(T+273.15)5；rtoIndicate oil-pipe external wall radius；rciIndicate set Inside pipe wall radius.
For the thermal convection current thermal resistance R between air and internal surface of sleeve pipe5For,
For the thermal resistance R between oil pipe inside and outside wall6For,
Wherein, KtubIndicate oil pipe thermal coefficient；rtiIndicate tube inner wall radius；rtoIndicate oil-pipe external wall radius.
For the thermal convection current thermal resistance R between crude oil and tube inner wall7For,
Wherein, fwIndicate liquid aqueous rate, roIndicate hollow stem exterior radius, λoIndicate crude oil heat-conducting system；
For the thermal convection current thermal resistance R between hollow stem inside and outside wall8For,
Wherein, KRodIndicate hollow stem thermal coefficient；roIndicate hollow stem exterior radius, riIndicate hollow stem inner wall radius.
For the thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9For,
Wherein, rn_toIndicate inner oil tube exterior radius.
For the thermal convection current thermal resistance R between inner tube inside and outside wall10For,
Wherein, KtubIndicate oil pipe thermal coefficient；rn_toIndicate inner oil tube exterior radius；rn_tiIndicate inner oil tube inner wall half Diameter.
For the thermal convection current thermal resistance R between hot fluid and inner tube11For,
Step 203)：The pit shaft unit radial heat loss Q of unit length is determined using thermal resistance information；
Entire pit shaft is divided into several units in the longitudinal direction, main heat loss diametrical heat loss in fact, according to energy Amount law of conservation derives that the accounting equation of heat loss is：
In formula：TsFor inner tube hot water inner wall temperature；Q is pit shaft unit radial heat loss；TeFor near-bottom temperature, Te=Tins+ Adl, TinsFor surface temperature；A is geothermal gradient；R is pit shaft unit radial entire thermal resistance.Pit shaft unit radial entire thermal resistance is divided to two kinds Situation, the first is in positive injection, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；Another kind is in anti-note, R=R1+R2 +R3+R4+R5+R6+R7+R8+R9+R10+R11。
Step 204)：It is determined in anti-note wellbore oil temperature using the pit shaft unit radial heat loss Q of unit length Spend field；
Since well head, in anti-note, calculated under inner tube pit shaft unit using the pit shaft unit radial heat loss Q The temperature value at end,
The expression formula of the temperature value of said inner tube pit shaft unit lower end is：
CmTs- Q/1000=CmTs'
Wherein, Ts' indicate the temperature after the variation of inner tube hot water；C indicates the specific heat capacity of water；M indicates the mass flow of hot water； TsFor inner tube hot water temperature；
An element length dl is recycled, the inner tube pit shaft length of cycle calculations is less than the random length of well depth, for example takes 10m For a unit, using the temperature value for the inner tube pit shaft unit lower end being calculated as the inner tube wall of next element length dl Temperature Ts, the inner tube hot water of next element length dl is calculated using the expression formula of the temperature value of said inner tube pit shaft unit lower end Temperature T after variations', loop iteration calculates, until inner tube pit shaft length is more than or equal to well depth, then iteration terminates.Each unit Temperature T after the corresponding inner tube hot water variation of lengths' constitute the temperature field of entire inner tube.
Utilize the thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, thermal convection current thermal resistance between inner tube inside and outside wall R10, thermal convection current thermal resistance R between hot fluid and inner tube11With pit shaft unit radial heat loss Q obtain outer wall of inner tube temperature value, The temperature value of hollow stem inner wall；
The expression formula of the temperature of said inner tube outer wall is：
Tn_to=Ts-(R10+R11)Q/dl
Wherein, Tn_toIndicate the temperature of outer wall of inner tube, TsFor inner tube hot water temperature；R10Indicate the heat between inner tube inside and outside wall Thermal-convection resistance, R11Indicate the thermal convection current thermal resistance between hot fluid and inner tube；
The expression formula of the temperature of the hollow stem inner wall is：
Ti=Ts-(R9+R10+R11)Q/dl
Wherein, TsFor inner tube hot water temperature, R9Thermal convection current thermal resistance between hot fluid and hollow stem inner wall, R10For inner tube Thermal convection current thermal resistance between inside and outside wall, R11Thermal convection current thermal resistance between hot fluid and inner tube；TiIndicate the temperature of hollow stem inner wall Degree；
It is similar with the temperature field of inner tube pit shaft unit lower end, by cyclic iterative method, utilize the temperature value of outer wall of inner tube The temperature field for determining outer wall of inner tube determines the temperature field inside hollow stem using the temperature value inside hollow stem；
The temperature of inner tube and hollow stem annular space is obtained using the temperature of outer wall of inner tube, the temperature of hollow stem inner wall；In described It manages and is with the expression formula of the temperature of hollow stem annular space：
Wherein, THIndicate the temperature of inner tube and hollow stem annular space.
Utilize the temperature T of inner tube and hollow stem annular spaceHDetermine the temperature field of inner tube and hollow stem annular space.
Utilize the heat transfer thermal resistance R between pit shaft unit radial heat loss Q, oil pipe inside and outside wall6, crude oil and tube inner wall it Between thermal convection current thermal resistance R7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, thermal convection current between hot fluid and hollow stem inner wall Thermal resistance R9, thermal convection current thermal resistance R between inner tube inside and outside wall10Thermal convection current thermal resistance R between hot fluid and inner tube11It determines in oil pipe Wall temperature, oil-pipe external wall temperature；
The expression formula of the tube inner wall temperature is：
Tti=Ts-(R7+R8+R9+R10+R11)Q/dl
Wherein, TtiIndicate tube inner wall temperature；
The expression formula of the oil-pipe external wall temperature is：
Tto=Ts-(R6+R7+R8+R9+R10+R11)Q/dl
It is similar with the temperature field of inner tube pit shaft unit lower end, it is true using tube inner wall temperature value by cyclic iterative method Jet tube inner wall temperature field determines oil-pipe external wall temperature field using oil-pipe external wall temperature value；
The initial crude oil temperature in outer oil pipe inlet is determined using tube inner wall temperature, oil-pipe external wall temperature；
The expression formula of the initial crude oil temperature in oil pipe inlet is：
Wherein, TuIndicate the initial crude oil temperature in oil pipe inlet.
Wellbore oil temperature field is determined using the initial crude oil temperature in outer oil pipe inlet；Meanwhile obtaining crude oil specific heat capacity With the mass velocity of crude oil；
The expression formula in the wellbore oil temperature field is：
Wherein, Tu' indicate wellbore oil temperature field；C2Indicate the specific heat capacity of crude oil, C2=4.2 × fw+2.2×(1-fw)； m2Indicate the mass velocity of crude oil,Q indicates Liquid output；γoIndicate oil density.
Based on above-mentioned operation principle, the present invention proposes that the Wellbore Temperature Field of another hot water circulation heated viscosity reduction technique obtains Method.As shown in Figure 2 b.The step 201 of this method~step 203 is as with Fig. 2 a displaying, it is unique unlike last Step, the final step of Fig. 2 b are：
Step 204 ')：It is determined in positive injection wellbore oil temperature using the pit shaft unit radial heat loss Q of unit length Spend field；
Since well head, in positive injection, inner tube and hollow burr are calculated using the pit shaft unit radial heat loss Q The temperature value of empty well cylinder unit lower end, using the temperature value of inner tube and hollow stem annulus wellbore unit lower end determine entire inner tube with The temperature field of hollow stem annular space；
Said inner tube and the temperature expression formula of hollow stem annular space are：
CmTs_h(Q+Q')/1000=CmT's_h
Wherein, T 's_hIndicate inner tube and the temperature after the variation of hollow stem annular space hot water；C indicates the specific heat capacity of water；M indicates heat The mass flow of water；Ts_hFor inner tube and hollow stem annular space hot water temperature；Q' indicates inner tube hot water caloric receptivity,TeIndicate that near-bottom temperature, R are pit shaft unit radial entire thermal resistance, R=R1+ R2+R3+R4+R5+R6+R7+R8+R9。
It is similar with the temperature field of inner tube pit shaft unit lower end, by cyclic iterative method, utilize inner tube and hollow stem annular space Temperature determine the temperature field of inner tube and hollow stem annular space.
From entire inner tube and the temperature for obtaining inner tube in the temperature field of hollow stem annular space with hollow stem and connecting contact, the contact For point positioned at the bottom of inner tube, i.e., corresponding temperature is the bottom hole temperature (BHT) of inner tube.That is, finally obtaining the shaft bottom temperature of inner tube Degree.
Inner pipe sections radial direction heat loss is determined using the bottom hole temperature (BHT) of inner tube；The expression of said inner tube unit radial heat loss Formula is：
Wherein, TeIndicate that the bottom hole temperature (BHT) of inner tube, R are pit shaft unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+ R8+R9+R10+R11。
The temperature of inner tube is determined using the bottom hole temperature (BHT) of inner pipe sections radial direction heat loss and inner tube；The temperature of said inner tube Expression formula is：
CmTs- Q/1000=CmTs′
Wherein, Ts' indicate the temperature after the variation of inner tube hot water；C indicates the specific heat capacity of water；M indicates the mass flow of hot water； TsFor the bottom hole temperature (BHT) of inner tube hot water.
It is similar with the temperature field of inner tube pit shaft unit lower end, it is true using the temperature of said inner tube by cyclic iterative method Determine the temperature field of inner tube.
Utilize the heat transfer thermal resistance R between pit shaft unit radial heat loss Q, oil pipe inside and outside wall6, crude oil and tube inner wall it Between thermal convection current thermal resistance R7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, thermal convection current between hot fluid and hollow stem inner wall Thermal resistance R9Determine tube inner wall temperature, oil-pipe external wall temperature；
The expression formula of the tube inner wall temperature is：
Tti=Ts-(R7+R8+R9)Q/dl
Wherein, TsFor inner tube hot water temperature；TtiIndicate tube inner wall temperature field；TeIndicate bottom temperature Degree, R are pit shaft unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；
The expression formula of the oil-pipe external wall temperature is：
Tto=Ts-(R6+R7+R8+R9)Q/dl
Wherein, TtoIndicate oil-pipe external wall temperature field；TsFor inner tube hot water temperature；TeIndicate bottom temperature Degree, R are pit shaft unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；
It is similar with the temperature field of inner tube pit shaft unit lower end, it is true using tube inner wall temperature value by cyclic iterative method Jet tube inner wall temperature field determines oil-pipe external wall temperature field using oil-pipe external wall temperature value；
And determine the initial crude oil temperature in outer oil pipe inlet using tube inner wall temperature field, oil-pipe external wall temperature field；Institute The expression formula for stating the initial crude oil temperature in outer oil pipe inlet is：
Wellbore oil temperature field is determined using the initial crude oil temperature in outer oil pipe inlet, meanwhile, obtain crude oil specific heat capacity With the mass velocity of crude oil.
The expression formula in the wellbore oil temperature field is：
Wherein, Tu' indicate wellbore oil temperature field；TeIndicate that near-bottom temperature, R are pit shaft unit radial Entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；C2Indicate the specific heat capacity of crude oil, C2=4.2 × fw+2.2×(1-fw)；m2 Indicate the mass velocity of crude oil,Q indicates Liquid output；γoIndicate oil density.
This method is the exploitation for viscous crude, special thick oil and super-viscous oil, and viscosity is mainly affected by temperature big feature, carries Lower newborn coiled tubing in a kind of calculating hollow stem is gone out, by the method mixed with hot water for reducing viscosity of crude, on this Process ba- sis A set of method for calculating temperature in wellbore field distribution is formd, and forms a set of interpretative tool.By to rear pit shaft temperature mixed with hot water The decoupled method analysis for spending field, to understand and grasp inner tube, the temperature of inner tube and hollow stem annular space, pit shaft in the process mixed with hot water Degree distribution and variation tendency mix the discharge capacity and temperature of hot water with the rational well head of Instructing manufacture practical choice；
Example devices
Based on above-mentioned operation principle, the present invention also proposes that a kind of Wellbore Temperature Field of hot water circulation heated viscosity reduction technique obtains Device.As shown in Figure 3a, including：
First parameter determination unit 301, for determining data parameters；
Second parameter determination unit 302, the data parameters for being determined using first parameter determination unit obtain ground Layer thermal resistance R1, cement sheath thermal resistance R2, casing wall thermal resistance R3, thermal convection current liquid thermal resistance R between liquid and internal surface of sleeve pipe4, air with Thermal convection current thermal resistance R between internal surface of sleeve pipe5, heat transfer thermal resistance R between oil pipe inside and outside wall6, heat between crude oil and tube inner wall Thermal-convection resistance R7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, thermal convection current thermal resistance between hot fluid and hollow stem inner wall R9, thermal convection current thermal resistance R between inner tube inside and outside wall10Thermal convection current thermal resistance R between hot fluid and inner tube11；
Pit shaft unit radial heat loss determination unit 303, the pit shaft unit for determining unit length using thermal resistance information Radial heat loss Q；
Anti- note unit 304, for since well head, in anti-note, being counted using the pit shaft unit radial heat loss Q The temperature value for calculating inner tube pit shaft unit lower end, the temperature field of entire inner tube is determined using the temperature value of inner tube pit shaft unit lower end； Utilize the thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10, hot fluid Thermal convection current thermal resistance R between inner tube11The temperature of outer wall of inner tube, hollow stem inner wall are obtained with pit shaft unit radial heat loss Q Temperature；The temperature field that outer wall of inner tube is determined using the temperature of said inner tube outer wall is determined using the temperature of the hollow stem inner wall The temperature field of hollow stem inner wall；Inner tube and hollow stem annular space are obtained using the temperature of outer wall of inner tube, the temperature of hollow stem inner wall Temperature；The temperature field of inner tube and hollow stem annular space is determined using the temperature of inner tube and hollow stem annular space；Utilize pit shaft unit radial The thermal convection current thermal resistance R between heat transfer thermal resistance R6, crude oil and tube inner wall between heat loss Q, oil pipe inside and outside wall7, hollow stem Thermal convection current thermal resistance R between inside and outside wall8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, between inner tube inside and outside wall Thermal convection current thermal resistance R10Thermal convection current thermal resistance R between hot fluid and inner tube11Determine tube inner wall temperature, oil-pipe external wall temperature；Profit Tube inner wall temperature field is determined with tube inner wall temperature value, and oil-pipe external wall temperature field is determined using oil-pipe external wall temperature value；It utilizes Tube inner wall temperature, oil-pipe external wall temperature determine the initial crude oil temperature in outer oil pipe inlet；It is initial using outer oil pipe inlet Crude oil temperature determine wellbore oil temperature field；Meanwhile obtaining the mass velocity of crude oil specific heat capacity and crude oil
Accordingly, it is based on above-mentioned operation principle, the present invention also proposes the pit shaft of another hot water circulation heated viscosity reduction technique Temperature field acquisition device.As shown in Figure 3b, the first parameter determination unit 301, the second parameter determination unit 302, the well of the present apparatus Cylinder unit radial heat loss determination unit 303 is the same with the function of Fig. 3 a, unique the difference is that the last one unit, Fig. 3 b are most The latter unit is：
Positive injection unit 304 ', for since well head, in positive injection, utilizing the pit shaft unit radial heat loss Q The temperature value for calculating inner tube and hollow stem annulus wellbore unit lower end, utilizes the temperature of inner tube and hollow stem annulus wellbore unit lower end Angle value determines the temperature field of entire inner tube and hollow stem annular space；Inner tube is obtained in temperature field from entire inner tube with hollow stem annular space Bottom hole temperature (BHT)；Inner pipe sections radial direction heat loss is determined using the bottom hole temperature (BHT) of inner tube；Using inner pipe sections radial direction heat loss and The bottom hole temperature (BHT) of inner tube determines the temperature of inner tube；The temperature field of inner tube is determined using the temperature of inner tube；Utilize pit shaft unit radial Heat transfer thermal resistance R between heat loss Q, oil pipe inside and outside wall6, thermal convection current thermal resistance R between crude oil and tube inner wall7, in hollow stem Thermal convection current thermal resistance R between outer wall8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9Determine tube inner wall temperature, oil Tube wall temperature；Tube inner wall temperature field is determined using tube inner wall temperature, and oil-pipe external wall temperature is determined using oil-pipe external wall temperature Spend field；The initial crude oil temperature in outer oil pipe inlet is determined using tube inner wall temperature, oil-pipe external wall temperature, is entered using outer oil pipe Initial crude oil temperature determines wellbore oil temperature field at mouthful.
Based on above-mentioned virtual bench, the course of work of the device is introduced with reference to an embodiment.
To realize the function of above-mentioned virtual bench, entire work system includes data acquisition module and terminal computer system System.Wherein,
1, data acquisition module
There are one the devices of data acquisition at scene, and well head is injected to the discharge capacity and temperature of hot water by the device；Cement is led Hot coefficient；Wellbore radius；Inner tube internal-and external diameter；Hollow stem internal-and external diameter；Depth；Oil pipe internal-and external diameter；Oil pipe thermal coefficient；Casing heat conduction Coefficient；Casing inner diameter；Sleeve outer；Wellbore fluid moisture content；Crude oil thermal coefficient；The thermal coefficient of water；Relative oil density； Formation thermal conductivity；Surface temperature；The basic data acquisitions such as geothermal gradient obtain, and then by fibre-optic transmission system (FOTS), are transferred to In terminal computing system.
2, terminal computing system
Terminal computing system is by data sink by data entry computer system, and computer system is equipped with " meter Calculate software ", the basic data received is automatically imported in software for calculation, is then calculated automatically.Such as Fig. 4~Fig. 9 institutes Show.
One of the key of double layer hollow sucker rod hot water circulation heated viscosity reduction technology is to determine the hot water incorporation of well head Discharge capacity and temperature.This two parameter index, which is mainly varied with temperature by viscosity of crude, to be influenced.Therefore, to determine that rational well head is mixed Enter discharge capacity and temperature, must just study the distribution in the temperature field in the wellbore, pressure field of crude oil.By inquiring lot of documents, money Material, there is no similar computational methods at present, thus can not Accurate Prediction go out double layer hollow sucker rod hot water circulation heated viscosity reduction work The key parameter of skill, this patent are intended to fill up above-mentioned blank, provide a kind of exact algorithm realized for computer program.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include Within protection scope of the present invention.

Claims (10)

1. a kind of Wellbore Temperature Field acquisition methods of hot water circulation heated viscosity reduction technique, which is characterized in that including：
Determine data parameters；
Thermal resistance R is obtained using the data parameters1, cement sheath thermal resistance R2, casing wall thermal resistance R3, liquid and internal surface of sleeve pipe it Between thermal convection current liquid thermal resistance R4, thermal convection current thermal resistance R between air and internal surface of sleeve pipe5, thermally conductive heat between oil pipe inside and outside wall Hinder R6, thermal convection current thermal resistance R between crude oil and tube inner wall7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, hot fluid with Thermal convection current thermal resistance R between hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10Between hot fluid and inner tube Thermal convection current thermal resistance R11；
The pit shaft unit radial heat loss Q of unit length is determined using thermal resistance information；
Since well head, in anti-note, inner tube pit shaft unit lower end is calculated using the pit shaft unit radial heat loss Q Temperature value determines the temperature field of entire inner tube using the temperature value of inner tube pit shaft unit lower end；Using in hot fluid and hollow stem Thermal convection current thermal resistance R between wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10, thermal convection current heat between hot fluid and inner tube Hinder R11Temperature, the temperature of hollow stem inner wall of outer wall of inner tube are obtained with pit shaft unit radial heat loss Q；Utilize said inner tube outer wall Temperature determine the temperature field of outer wall of inner tube, the temperature field of hollow stem inner wall is determined using the temperature of the hollow stem inner wall；Profit The temperature of inner tube and hollow stem annular space is obtained with the temperature of outer wall of inner tube, the temperature of hollow stem inner wall；Utilize inner tube and hollow stem The temperature of annular space determines the temperature field of inner tube and hollow stem annular space；Using between pit shaft unit radial heat loss Q, oil pipe inside and outside wall Heat transfer thermal resistance R6, thermal convection current thermal resistance R between crude oil and tube inner wall7, thermal convection current thermal resistance between hollow stem inside and outside wall R8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10And hot fluid Thermal convection current thermal resistance R between inner tube11Determine tube inner wall temperature, oil-pipe external wall temperature；It is determined using tube inner wall temperature value Tube inner wall temperature field determines oil-pipe external wall temperature field using oil-pipe external wall temperature value；Utilize tube inner wall temperature, oil-pipe external wall Temperature determines the initial crude oil temperature in outer oil pipe shaft bottom inlet；Utilize outer oil pipe inlet initial crude oil temperature and crude oil The mass velocity of specific heat capacity and crude oil determines the thermo parameters method of crude oil in outer oil pipe.
2. the method as described in claim 1, which is characterized in that the data parameters include：Well head inject hot water discharge capacity and Temperature；Cement thermal coefficient；Wellbore radius；Inner tube internal-and external diameter；Hollow stem internal-and external diameter；Depth；Oil pipe internal-and external diameter；Oil pipe heat conduction system Number；Casing thermal coefficient；Casing inner diameter；Sleeve outer；Wellbore fluid moisture content；Crude oil thermal coefficient；The thermal coefficient of water；It is former Oily relative density；Formation thermal conductivity；Surface temperature；Geothermal gradient.
3. method as claimed in claim 2, which is characterized in that the expression formula of the pit shaft unit radial heat loss Q is：
Wherein, TsFor inner tube hot water temperature, TeIndicate that near-bottom temperature, dl indicate that element length, R are pit shaft unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9+R10+R11。
4. method as claimed in claim 2 or claim 3, which is characterized in that the expression formula of the temperature of said inner tube is：
CmTs- Q/1000=CmTs'
Wherein, Ts' indicate the temperature after the variation of inner tube hot water；C indicates the specific heat capacity of water；M indicates the mass flow of hot water；TsFor Inner tube hot water temperature；
The expression formula of the temperature of said inner tube outer wall is：
Tn_to=Ts-(R10+R11)Q/dl
Wherein, Tn_toIndicate the temperature of outer wall of inner tube, TsFor inner tube hot water temperature；R10Indicate the thermal convection current between inner tube inside and outside wall Thermal resistance, R11Indicate the thermal convection current thermal resistance between hot fluid and inner tube；Dl indicates element length；
The expression formula of the temperature of the hollow stem inner wall is：
Ti=Ts-(R9+R10+R11)Q/dl
Wherein, TsFor inner tube hot water temperature, R9Thermal convection current thermal resistance between hot fluid and hollow stem inner wall, R10Inside and outside inner tube Thermal convection current thermal resistance between wall, R11Thermal convection current thermal resistance between hot fluid and inner tube；TiIndicate the temperature of hollow stem inner wall；
The expression formula of said inner tube and the temperature of hollow stem annular space is：
Wherein, THIndicate the temperature of inner tube and hollow stem annular space；
The expression formula of the tube inner wall temperature is：
Tti=Ts-(R7+R8+R9+R10+R11)Q/dl
Wherein, TtiIndicate tube inner wall temperature；
The expression formula in the oil-pipe external wall temperature field is：
Tto=Ts-(R6+R7+R8+R9+R10+R11)Q/dl
The expression formula of the initial crude oil temperature in oil pipe inlet is：
Wherein, TuIndicate the initial crude oil temperature in oil pipe inlet；
The expression formula in the wellbore oil temperature field is：
Wherein, Tu' indicate wellbore oil temperature field；C2Indicate the specific heat capacity of crude oil, C2=4.2 × fw+2.2×(1-fw)；m2Table Show the mass velocity of crude oil, fwIndicate liquid aqueous rate；Q indicates Liquid output；γoIndicate oil density.
5. a kind of Wellbore Temperature Field acquisition device of hot water circulation heated viscosity reduction technique, which is characterized in that including：
First parameter determination unit, for determining data parameters；
Second parameter determination unit, the data parameters for being determined using first parameter determination unit obtain thermal resistance R1、 Cement sheath thermal resistance R2, casing wall thermal resistance R3, thermal convection current liquid thermal resistance R between liquid and internal surface of sleeve pipe4, air and internal surface of sleeve pipe Between thermal convection current thermal resistance R5, heat transfer thermal resistance R between oil pipe inside and outside wall6, thermal convection current thermal resistance between crude oil and tube inner wall R7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, in inner tube Thermal convection current thermal resistance R between outer wall10Thermal convection current thermal resistance R between hot fluid and inner tube11；
Pit shaft unit radial heat loss determination unit, the pit shaft unit radial heat waste for determining unit length using thermal resistance information Lose Q；
Anti- note unit, for since well head, in anti-note, inner tube to be calculated using the pit shaft unit radial heat loss Q The temperature value of pit shaft unit lower end determines the temperature field of entire inner tube using the temperature value of inner tube pit shaft unit lower end；Utilize heat Thermal convection current thermal resistance R between fluid and hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10, hot fluid and inner tube Between thermal convection current thermal resistance R11Temperature, the temperature of hollow stem inner wall of outer wall of inner tube are obtained with pit shaft unit radial heat loss Q；Profit The temperature field that outer wall of inner tube is determined with the temperature of said inner tube outer wall is determined using the temperature of the hollow stem inner wall in hollow stem The temperature field of wall；The temperature of inner tube and hollow stem annular space is obtained using the temperature of outer wall of inner tube, the temperature of hollow stem inner wall；It utilizes Inner tube and the temperature of hollow stem annular space determine the temperature field of inner tube and hollow stem annular space；Utilize pit shaft unit radial heat loss Q, oil Heat transfer thermal resistance R between pipe inside and outside wall6, thermal convection current thermal resistance R between crude oil and tube inner wall7, between hollow stem inside and outside wall Thermal convection current thermal resistance R8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, thermal convection current thermal resistance between inner tube inside and outside wall R10Thermal convection current thermal resistance R between hot fluid and inner tube11Determine tube inner wall temperature, oil-pipe external wall temperature；Utilize tube inner wall Temperature value determines tube inner wall temperature field, and oil-pipe external wall temperature field is determined using oil-pipe external wall temperature value；Utilize tube inner wall temperature Degree, oil-pipe external wall temperature determine the initial crude oil temperature in outer oil pipe shaft bottom inlet；Utilize the initial crude oil in outer oil pipe inlet Temperature and the mass velocity of crude oil specific heat capacity and crude oil determine the thermo parameters method of crude oil in outer oil pipe.
6. a kind of Wellbore Temperature Field acquisition methods of hot water circulation heated viscosity reduction technique, which is characterized in that including：
Determine data parameters；
Thermal resistance R is obtained using the data parameters1, cement sheath thermal resistance R2, casing wall thermal resistance R3, liquid and internal surface of sleeve pipe it Between thermal convection current liquid thermal resistance R4, thermal convection current thermal resistance R between air and internal surface of sleeve pipe5, thermally conductive heat between oil pipe inside and outside wall Hinder R6, thermal convection current thermal resistance R between crude oil and tube inner wall7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, hot fluid with Thermal convection current thermal resistance R between hollow stem inner wall9, thermal convection current thermal resistance R between inner tube inside and outside wall10Between hot fluid and inner tube Thermal convection current thermal resistance R11；
The pit shaft unit radial heat loss Q of unit length is determined using thermal resistance information；
Since well head, in positive injection, inner tube and hollow stem annular are calculated using the pit shaft unit radial heat loss Q The temperature value of cylinder unit lower end, using the temperature value of inner tube and hollow stem annulus wellbore unit lower end determine entire inner tube with it is hollow The temperature field of burr sky；From the bottom hole temperature (BHT) for obtaining inner tube in the temperature field of entire inner tube and hollow stem annular space；Utilize inner tube Bottom hole temperature (BHT) determines inner pipe sections radial direction heat loss；Inner tube is determined using the bottom hole temperature (BHT) of inner pipe sections radial direction heat loss and inner tube Temperature；The temperature field of inner tube is determined using the temperature of inner tube；Using between pit shaft unit radial heat loss Q, oil pipe inside and outside wall Heat transfer thermal resistance R6, thermal convection current thermal resistance R between crude oil and tube inner wall7, thermal convection current thermal resistance between hollow stem inside and outside wall R8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9Determine tube inner wall temperature, oil-pipe external wall temperature；Utilize oil pipe Inner wall temperature determines tube inner wall temperature field, and oil-pipe external wall temperature field is determined using oil-pipe external wall temperature；Utilize tube inner wall temperature Degree, oil-pipe external wall temperature determine the initial crude oil temperature in outer oil pipe shaft bottom inlet, utilize the initial crude oil in outer oil pipe inlet Temperature determines wellbore oil thermo parameters method.
7. method as claimed in claim 6, which is characterized in that the data parameters include：Well head inject hot water discharge capacity and Temperature；Cement thermal coefficient；Wellbore radius；Inner tube internal-and external diameter；Hollow stem internal-and external diameter；Depth；Oil pipe internal-and external diameter；Oil pipe heat conduction system Number；Casing thermal coefficient；Casing inner diameter；Sleeve outer；Wellbore fluid moisture content；Crude oil thermal coefficient；The thermal coefficient of water；It is former Oily relative density；Formation thermal conductivity；Surface temperature；Geothermal gradient.
8. the method for claim 7, which is characterized in that the expression formula of the pit shaft unit radial heat loss Q is：
Wherein, TsFor inner tube hot water temperature, TeIndicate that near-bottom temperature, dl indicate element length；R is pit shaft unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9。
9. method as claimed in claim 6, which is characterized in that in positive injection, the temperature of said inner tube and hollow stem annular space Spending expression formula is：
CmTs_h(Q+Q')/1000=CmT's_h
Wherein, T 's_hIndicate inner tube and the temperature after the variation of hollow stem annular space hot water；C indicates the specific heat capacity of water；M indicates hot water Mass flow；Ts_hFor inner tube and hollow stem annular space hot water temperature；Q' indicates inner tube hot water caloric receptivity,Dl indicates element length；TeIndicate that near-bottom temperature, R are pit shaft unit diameter To entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；
The expression formula of the temperature of said inner tube is：
CmTs- Q/1000=CmTs'
Wherein, Ts' indicate the temperature after the variation of inner tube hot water；C indicates the specific heat capacity of water；M indicates the mass flow of hot water；TsFor Inner tube hot water temperature；Dl indicates element length；TeIndicate that near-bottom temperature, R are pit shaft unit radial total heat Resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；
The expression formula of the tube inner wall temperature is：
Tti=Ts-(R7+R8+R9)Q/dl
Wherein, TsFor inner tube hot water temperature；TtiIndicate tube inner wall temperature；Dl indicates element length；TeTable Show that near-bottom temperature, R are pit shaft unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；
The expression formula of the oil-pipe external wall temperature is：
Tto=Ts-(R6+R7+R8+R9)Q/dl
Wherein, TtoIndicate oil-pipe external wall temperature；TsFor inner tube hot water temperature；Dl indicates element length；TeTable Show that near-bottom temperature, R are pit shaft unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；
The expression formula of the initial crude oil temperature in outer oil pipe inlet is：
The expression formula in the wellbore oil temperature field is：
Wherein, Tu' indicate wellbore oil temperature field；Dl indicates element length；TeIndicate near-bottom temperature, R is well Cylinder unit radial entire thermal resistance, R=R1+R2+R3+R4+R5+R6+R7+R8+R9；C2Indicate the specific heat capacity of crude oil, C2=4.2 × fw+2.2 ×(1-fw)；fwIndicate liquid aqueous rate；m2Indicate the mass velocity of crude oil,Q indicates Liquid output；γoIt indicates Oil density.
10. a kind of Wellbore Temperature Field acquisition device of hot water circulation heated viscosity reduction technique, which is characterized in that including：
First parameter determination unit, for determining data parameters；
Second parameter determination unit, the data parameters for being determined using first parameter determination unit obtain thermal resistance R1、 Cement sheath thermal resistance R2, casing wall thermal resistance R3, thermal convection current liquid thermal resistance R between liquid and internal surface of sleeve pipe4, air and internal surface of sleeve pipe Between thermal convection current thermal resistance R5, heat transfer thermal resistance R between oil pipe inside and outside wall6, thermal convection current thermal resistance between crude oil and tube inner wall R7, thermal convection current thermal resistance R between hollow stem inside and outside wall8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9, in inner tube Thermal convection current thermal resistance R between outer wall10Thermal convection current thermal resistance R between hot fluid and inner tube11；
Pit shaft unit radial heat loss determination unit, the pit shaft unit radial heat waste for determining unit length using thermal resistance information Lose Q；
Positive injection unit, for since well head, in positive injection, inner tube to be calculated using the pit shaft unit radial heat loss Q With the temperature value of hollow stem annulus wellbore unit lower end, determined using the temperature value of inner tube and hollow stem annulus wellbore unit lower end The temperature field of entire inner tube and hollow stem annular space；From the shaft bottom temperature for obtaining inner tube in the temperature field of entire inner tube and hollow stem annular space Degree；Inner pipe sections radial direction heat loss is determined using the bottom hole temperature (BHT) of inner tube；Utilize the well of inner pipe sections radial direction heat loss and inner tube Bottom temperature determines the temperature of inner tube；The temperature field of inner tube is determined using the temperature of inner tube；Using pit shaft unit radial heat loss Q, Heat transfer thermal resistance R between oil pipe inside and outside wall6, thermal convection current thermal resistance R between crude oil and tube inner wall7, between hollow stem inside and outside wall Thermal convection current thermal resistance R8, thermal convection current thermal resistance R between hot fluid and hollow stem inner wall9Determine tube inner wall temperature, oil-pipe external wall temperature Degree；Tube inner wall temperature field is determined using tube inner wall temperature, and oil-pipe external wall temperature field is determined using oil-pipe external wall temperature；It utilizes Tube inner wall temperature, oil-pipe external wall temperature determine the initial crude oil temperature in outer oil pipe shaft bottom inlet, utilize outer oil pipe inlet Initial crude oil temperature determines wellbore oil temperature field.
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Publication number Priority date Publication date Assignee Title
CN106021958B (en) * 2016-06-14 2019-04-12 中国石油天然气股份有限公司 A kind of determination method and device of gas injection well packer upper and lower ends temperature
CN106761680B (en) * 2017-01-17 2019-08-02 西南石油大学 A kind of judgment method of chemical viscosity reduction auxiliary threaded rod pump lifting heavy oil process
CN106971082B (en) * 2017-05-05 2020-06-26 中国石油化工股份有限公司 Viscosity reduction parameter optimization method for heavy oil well
CN107356627B (en) * 2017-07-04 2019-08-20 大连理工大学 A method of based on fictitious heat source using the four parameters matching measurement heterogeneous content of material
CN109033012B (en) * 2018-06-28 2023-01-06 中国石油天然气股份有限公司 Method and device for determining temperature field of hollow sucker rod hot water injection circulation shaft
CN110067546A (en) * 2019-04-15 2019-07-30 中国石油化工股份有限公司 The method of discrimination of oil well channeling in steam-drive process

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103590818A (en) * 2013-10-21 2014-02-19 中国石油天然气股份有限公司 Shaft interior temperature distribution semi-analytical determination method and device
CN104373117A (en) * 2014-10-11 2015-02-25 中国石油天然气股份有限公司 Method and system for determining shaft temperature field distribution based on electric heating of hollow rod
CN104389589A (en) * 2014-10-11 2015-03-04 中国石油天然气股份有限公司 Method and system of determining shaft temperature field distribution based on hollow-rod
CN104453861A (en) * 2014-11-11 2015-03-25 中国石油天然气股份有限公司 Method and system for determining temperature distribution of high-pressure gas well shaft
CN104481482A (en) * 2014-11-07 2015-04-01 中国石油天然气股份有限公司 Concentric double-pipe gas injection and heat insulation analyzing method and device for horizontal well
CN104806230A (en) * 2015-02-16 2015-07-29 中国石油天然气股份有限公司 Supercritical steam injection well bore temperature field and pressure field distribution calculation method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8020621B2 (en) * 2007-05-08 2011-09-20 Baker Hughes Incorporated Downhole applications of composites having aligned nanotubes for heat transport

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103590818A (en) * 2013-10-21 2014-02-19 中国石油天然气股份有限公司 Shaft interior temperature distribution semi-analytical determination method and device
CN104373117A (en) * 2014-10-11 2015-02-25 中国石油天然气股份有限公司 Method and system for determining shaft temperature field distribution based on electric heating of hollow rod
CN104389589A (en) * 2014-10-11 2015-03-04 中国石油天然气股份有限公司 Method and system of determining shaft temperature field distribution based on hollow-rod
CN104481482A (en) * 2014-11-07 2015-04-01 中国石油天然气股份有限公司 Concentric double-pipe gas injection and heat insulation analyzing method and device for horizontal well
CN104453861A (en) * 2014-11-11 2015-03-25 中国石油天然气股份有限公司 Method and system for determining temperature distribution of high-pressure gas well shaft
CN104806230A (en) * 2015-02-16 2015-07-29 中国石油天然气股份有限公司 Supercritical steam injection well bore temperature field and pressure field distribution calculation method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
电加热井的井筒温度场数学模型;汪泓;《油气井测试》;20030630;第12卷(第3期);1-3 *

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