CN103867174A - Method and system for analyzing steam suction condition of thick oil horizontal well - Google Patents

Abstract

The invention provides a method and a system for analyzing the steam suction condition of a thick oil horizontal well. The method comprises the following steps of sectionalizing the horizontal well, and setting the gas injection volume of each section; calculating the average temperature of each section after liquid production according to basic well temperature data and stratus heat loss data by adopting stratum heat transfer and mass transfer principle as a constraint condition; constructing a theoretical well temperature curve of the horizontal well in the throughput round according to the average temperature of each section of the horizontal well after the liquid production; fitting the theoretical well temperature curve of the horizontal well in the throughput round and a measured well temperature curve of the throughput round, and performing inversion according to the fitted theoretical well temperature curve to obtain the gas injection volume of each section of the horizontal well. According to the method and the system, the use condition of the sections of the horizontal well can be evaluated, the use degree can be analyzed, and thick oil horizontal well process measure regulation and oil reservoir analysis can be guided.

Description

A kind of thick oil horizontal well is inhaled vapour status analysis method and system

Technical field

The present invention relates to oil exploration technology field, particularly a kind of thick oil horizontal well is inhaled vapour status analysis method and system.

Background technology

Viscous crude refers under formation condition, and viscosity was greater than for 50 milli handkerchief seconds, or degassed crude viscosity is the high viscosity heavy crude of 1000～10000 milli handkerchief seconds under reservoir temperature.Viscous crude is except viscosity height, and density is also high.Viscous crude is few containing light ends, and colloid and bitumen content are high.The viscosity of viscous crude varies with temperature, and changes significantly, as temperature increases by 8～9.C, viscosity can reduce half.Therefore, the exploitation to viscous crude, conveying, multiplex heating power reduces its viscosity, as steam driving, Circulation and Hot Oil Spray, combustion in situ etc.Also can adopt and mix thin oil, emulsification, add activating agent to reduce its viscosity.

Horizontal well refers to that hole angle reaches or approaches 90 °, and well bore creeps into the well of certain length along horizontal direction.In general, horizontal well is applicable to thin oil-gas Layer or fractured reservoirs, and object is to increase the bare area of oil-gas Layer.

Horizontal well heat extraction by steam injection has been widely used in developing heavy crude reservoir.Due to the impact of reservoir penetrating power and steam injection heating effect, thick oil horizontal well producing status complexity, is being difficult to obtain under the condition of inhaling vapour and production profile data, still can not effective evaluation horizontal well reservoir producing status.Produce at present above and enroll in a large number Horizontal Well temperature data by tubing transmission mode before steam injection and after the production of handling up, and by the qualitative level of understanding section of variations in temperature development degree, this evaluation method is too simple, and unreasonable, produces now and is badly in need of horizontal well producing status to evaluate.

The present invention adopts the feature of sieve tube completion in conjunction with thick oil horizontal well, simplify variable element, set up single attribute model, consider historical well temperature, note and adopt parameter influence, taking steam and fluid wellbore heat mass transfer rule as constraints, by certain bringing-up section suction vapour and production fluid parameter are adjusted, realization theory well temperature curve and the matching of measured curve phase, and then vapour intensity is inhaled in the segmentation of inverting horizontal segment; Evaluate horizontal segment producing status by this conclusion, analyze development degree.This technology has solved the evaluation problem of horizontal well development degree, is conducive to instruct the adjustment of thick oil horizontal well technological measure and oil pool analysis, and carrying out of this project is significant.

Summary of the invention

For solving the problems of the prior art, the application proposes a kind of thick oil horizontal well and inhales vapour status analysis method and system, by certain bringing-up section suction vapour and production fluid parameter are adjusted, realization theory well temperature curve and the matching of measured curve phase, and then inverting horizontal segment segmentation suction vapour intensity, to instruct the adjustment of thick oil horizontal well technological measure and oil pool analysis.

For achieving the above object, the application provides a kind of thick oil horizontal well to inhale vapour status analysis method, comprising:

By horizontal well in segments, and the gas injection rate of given each section;

Adopt stratum heat and mass principle as constraints, according to the average temperature after basic well temperature data and each section of production fluid of stratum heat waste data calculated level well;

According to the average temperature after each section of production fluid of described horizontal well, construct the theoretical well temperature of the round horizontal well curve of originally handling up;

Described the theoretical well temperature curve of the round horizontal well of handling up and this round are surveyed to well temperature curve and carry out matching, and carry out inverting according to the theoretical well temperature curve after matching, obtain the gas injection rate of each section of horizontal well.

Wherein, described according to stratum heat and mass principle, consider basic well temperature condition, the impact of stratum heat waste, the average temperature of calculating each section of heating comprises:

Before steam quality is non-vanishing, after stewing well, the average temperature of each section of horizontal well is:

Wherein, 0.7 thermal efficiency that is oil reservoir; C _wfor saturated specific heat of water; C _rockfor the specific heat of rock; Q _ifor the inspiratory capacity of each section of horizontal well; Q _rockfor the quality of hot water in rock; Q _wfor the quality of hot water in hole; t _ifor the basic well temperature of each section; h _mifor the heat content of each section of wet saturated steam; I=1,2 ..., m-1; M is that steam quality is zero elementary section.

Wherein,

h _mi=(1-X _i)h _l+X _ih _g；

Wherein, X _ifor each section of inlet steam mass dryness fraction; h _gfor the heat content of saturated vapour; h _lfor the heat content of saturation water;

Q _rock=(1-φ) π r _i ²l _i× ρ _rock;

Q _w=φπr _i ²l _i×ρ _w

φ is degree of porosity; l _ifor the length of each section; Ri is the Control Radius of the steam of each section; ρ _rockfor the density of rock; ρ _wfor the density of hot water in hole.

Wherein,

Wherein, Q _alwaysthe heat containing for injecting total steam.

Wherein,

If when Xi=0, the value of i is m, and after stewing well, the average temperature of each section of horizontal well is:

i=m, m+1 ..., N; M is that steam quality is zero elementary section.

Wherein,

According to the sticky curve of temperature, the viscosity of each section is: μ _i=f (T _i);

The mobility of each section is: ${\mathrm{\λ}}_i=\frac{k_i}{{\mathrm{\μ}}_i};$

The production fluid amount of each section of horizontal well is:

$Q_{\mathrm{ci}}=Q_c\×\frac{{\mathrm{\λ}}_i}{\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\λ}}_j};$

Average temperature after each section of production fluid of horizontal well is:

T _i'=[(C _rock× Q _rock+ C _w× Q _water) × T _i-Q _ci× T _i× C _w]/{ (Q _rock+ Q _water) × [(1-φ) C _rock+ φ C _w];

Wherein, i=1,2 ..., N; N is the segments of horizontal well; Q _cfor total fluid production; k _ifor the permeability of each section of horizontal well.

Wherein, described employing stratum heat and mass principle, as constraints, before the average temperature after basic well temperature data and each section of production fluid of stratum heat waste data calculated level well, also comprises:

Suppose mass flow Q, pressure P, the mass dryness fraction X of the stream-liquid two-phase flow of net horizontal section entrance ₀and temperature T _sfor known, and remain unchanged in whole steam injection process, whole horizontal segment keeps steady-flow;

In stratum, the heat transfer in the vertical cross section as for horizontal segment axis belongs to bidimensional Unsteady Heat Transfer;

In oil reservoir, the horizontal segment coefficient of heat conduction is radially infinitely great, is zero along the axial coefficient of heat conduction of horizontal segment;

The physical property of rock and fluid is constant;

Horizontal segment is divided into N elementary section, and on same elementary section, steam evenly injects oil reservoir, and the steam absorbing amount of each infinitesimal section is not etc.;

Wet saturated steam is in outflow process, without vapor-liquid separation.

The present invention provides a kind of thick oil horizontal well to inhale vapour status analysis system in addition, comprising:

Initialization unit, for by horizontal well in segments, and the gas injection rate of given each section;

Average temperature computing unit, for adopting stratum heat and mass principle as constraints, according to the average temperature after basic well temperature data and each section of production fluid of stratum heat waste data calculated level well;

Well temperature curve construction unit, for according to the average temperature after each section of production fluid of described horizontal well, constructs the theoretical well temperature of the round horizontal well curve of originally handling up;

Matching inverting unit, carries out matching for described the theoretical well temperature curve of the round horizontal well of handling up and this round are surveyed to well temperature curve, and carries out inverting according to the theoretical well temperature curve after matching, obtains the gas injection rate of each section of horizontal well.

Wherein, described average temperature computing unit comprises one first temperature computation subelement, the average temperature for the non-vanishing elementary section of the following formula calculation of steam mass dryness fraction of basis:

Before steam quality is non-vanishing, after stewing well, the average temperature of each section of horizontal well is:

Wherein, 0.7 thermal efficiency that is oil reservoir; C _wfor saturated specific heat of water; C _rockfor the specific heat of rock; Q _ifor the inspiratory capacity of each section of horizontal well; Q _rockfor the quality of hot water in rock; Q _wfor the quality of hot water in hole; t _ifor the basic well temperature of each section; h _mifor the heat content of each section of wet saturated steam; I=1,2 ..., m-1; M is that steam quality is zero elementary section.

Wherein, described average temperature computing unit comprises:

Heat content computing module, for calculate the heat content of each section of wet saturated steam according to following formula:

h _mi=(1-X _i)h _l+X _ih _g；

Wherein, X _ifor each section of inlet steam mass dryness fraction; h _gfor the heat content of saturated vapour; h _lfor the heat content of saturation water;

Hot water quality's computing module, for distinguish the quality of hot water in the quality of computing rock hot water and hole according to following formula:

Q _rock=(1-φ) π r _i ²l _i× ρ _rock;

Q _w=φπr _i ²l _i×ρ _w

φ is degree of porosity; l _ifor the length of each section; Ri is the Control Radius of the steam of each section; ρ _rockfor the density of rock; ρ _wfor the density of hot water in hole.

Wherein, described average temperature computing unit also comprises:

Mass dryness fraction computing module, for calculating the mass dryness fraction of each section:

Wherein, Q _alwaysthe heat containing for injecting total steam.

Wherein, also comprise one second temperature computation subelement, the average temperature of the elementary section that is zero for the following formula calculation of steam mass dryness fraction of basis:

After stewing well, the average temperature of each section of horizontal well is:

i=m, m+1 ..., N; Wherein, when Xi=0, the value of i is m.

Wherein, also comprise one the 3rd temperature computation subelement, the average temperature for each section of calculated level well:

According to the sticky curve of temperature, the viscosity of each section is: μ _i=f (T _i);

The mobility of each section is: ${\mathrm{\λ}}_i=\frac{k_i}{{\mathrm{\μ}}_i};$

The production fluid amount of each section of horizontal well is:

$Q_{\mathrm{ci}}=Q_c\×\frac{{\mathrm{\λ}}_i}{\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\λ}}_j};$

Average temperature after each section of production fluid of horizontal well is:

T _i'=[(C _rock× Q _rock+ C _w× Q _water) × T _i-Q _ci× T _i× C _w]/{ (Q _rock+ Q _water) × [(1-φ) C _rock+ φ C _w];

Wherein, i=1,2 ..., N; N is the segments of horizontal well; Q _cfor total fluid production; k _ifor the permeability of each section of horizontal well.

Wherein, also comprise setting parameter unit, for:

Set mass flow Q, pressure P, the mass dryness fraction X of the stream-liquid two-phase flow of net horizontal section entrance ₀and temperature T _s, and remain unchanged in whole steam injection process, whole horizontal segment keeps steady-flow;

In stratum, the heat transfer in the vertical cross section as for horizontal segment axis belongs to bidimensional Unsteady Heat Transfer;

In oil reservoir, the horizontal segment coefficient of heat conduction is radially infinitely great, is zero along the axial coefficient of heat conduction of horizontal segment;

The physical property of rock and fluid is constant;

Horizontal segment is divided into N elementary section, and on same elementary section, steam evenly injects oil reservoir, and the steam absorbing amount of each infinitesimal section is not etc.;

Wet saturated steam is in outflow process, without vapor-liquid separation.

The present invention can reach following beneficial effect: by certain bringing-up section suction vapour and production fluid parameter are adjusted, realization theory well temperature curve and the matching of measured curve phase, and then inverting horizontal segment segmentation suction vapour intensity, to instruct the adjustment of thick oil horizontal well technological measure and oil pool analysis.

Brief description of the drawings

Fig. 1 is that a kind of thick oil horizontal well of the present invention is inhaled the flow chart of vapour status analysis method;

Fig. 2 is that a kind of thick oil horizontal well of the present invention is inhaled the structure chart of vapour status analysis system.

Detailed description of the invention

Describe by specific embodiment below:

Embodiment mono-:

As shown in Figure 1, inhale the flow chart of vapour status analysis method for a kind of thick oil horizontal well of the present embodiment, comprise the following steps:

Step 101, by horizontal well in segments, and the gas injection rate of given each section;

Step 102, adopts stratum heat and mass principle as constraints, according to the average temperature after basic well temperature data and each section of production fluid of stratum heat waste data calculated level well;

Before steam quality is non-vanishing, after stewing well, the average temperature of each section of horizontal well is:

Wherein, 0.7 thermal efficiency that is oil reservoir; C _wfor saturated specific heat of water; C _rockfor the specific heat of rock; Q _ifor the inspiratory capacity of each section of horizontal well; Q _rockfor the quality of hot water in rock; Q _wfor the quality of hot water in hole; t _ifor the basic well temperature of each section; h _mifor the heat content of each section of wet saturated steam; I=1,2 ..., m-1; M is that steam quality is zero elementary section.

It should be noted that h _misubscript in, m is only as the mark action of enthalpy, irrelevant with the value of i.The h occurring in this application file _misubscript m all only play mark action.

Wherein,

h _mi=(1-X _i)h _l+X _ih _g；

Wherein, X _ifor each section of inlet steam mass dryness fraction; h _gfor the heat content of saturated vapour; h _lfor the heat content of saturation water;

Q _rock=(1-φ) π r _i ²l _i× ρ _rock;

Q _w=φπr _i ²l _i×ρ _w

φ is degree of porosity; l _ifor the length of each section; Ri is the Control Radius of the steam of each section; ρ _rockfor the density of rock; ρ _wfor the density of hot water in hole.

Wherein,

Wherein, Q _alwaysthe heat containing for injecting total steam.

Wherein,

If when Xi=0, the value of i is m, and after stewing well, the average temperature of each section of horizontal well is:

i=m, m+1 ..., N; M is that steam quality is zero elementary section.

It should be noted that h _li-mbe the sequence number of hot water computing unit, start from scratch.

Wherein,

According to the sticky curve of temperature, the viscosity of each section is: μ _i=f (T _i);

The mobility of each section is: ${\mathrm{\λ}}_i=\frac{k_i}{{\mathrm{\μ}}_i};$

The production fluid amount of each section of horizontal well is:

$Q_{\mathrm{ci}}=Q_c\×\frac{{\mathrm{\λ}}_i}{\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\λ}}_j};$

Average temperature after each section of production fluid of horizontal well is:

T _i'=[(C _rock× Q _rock+ C _w× Q _water) × T _i-Q _ci× T _i× C _w]/{ (Q _rock+ Q _water) × [(1-φ) C _rock+ φ C _w];

Wherein, i=1,2 ..., N; N is the segments of horizontal well; Q _cfor total fluid production; k _ifor the permeability of each section of horizontal well.

Wherein, described employing stratum heat and mass principle, as constraints, before the average temperature after basic well temperature data and each section of production fluid of stratum heat waste data calculated level well, also comprises:

Suppose mass flow Q, pressure P, the mass dryness fraction X of the stream-liquid two-phase flow of net horizontal section entrance ₀and temperature T _sfor known, and remain unchanged in whole steam injection process, whole horizontal segment keeps steady-flow;

In stratum, the heat transfer in the vertical cross section as for horizontal segment axis belongs to bidimensional Unsteady Heat Transfer;

In oil reservoir, the horizontal segment coefficient of heat conduction is radially infinitely great, is zero along the axial coefficient of heat conduction of horizontal segment;

The physical property of rock and fluid is constant;

Horizontal segment is divided into N elementary section, and on same elementary section, steam evenly injects oil reservoir, and the steam absorbing amount of each infinitesimal section is not etc.;

Wet saturated steam is in outflow process, without vapor-liquid separation.

Step 103, according to the average temperature after each section of production fluid of described horizontal well, constructs the theoretical well temperature of the round horizontal well curve of originally handling up;

Step 104, surveys well temperature curve by described the theoretical well temperature curve of the round horizontal well of handling up and this round and carries out matching, and carry out inverting according to the theoretical well temperature curve after matching, obtains the gas injection rate of each section of horizontal well.

As shown in Figure 2, inhale the structure chart of vapour status analysis system for a kind of thick oil horizontal well of the present invention, comprising:

Initialization unit 201, for by horizontal well in segments, and the gas injection rate of given each section;

Wherein, comprise setting parameter subelement 2011, for: the mass flow Q, pressure P, the mass dryness fraction X that set the stream-liquid two-phase flow of net horizontal section entrance ₀and temperature T _s, and remain unchanged in whole steam injection process, whole horizontal segment keeps steady-flow;

In stratum, the heat transfer in the vertical cross section as for horizontal segment axis belongs to bidimensional Unsteady Heat Transfer;

In oil reservoir, the horizontal segment coefficient of heat conduction is radially infinitely great, is zero along the axial coefficient of heat conduction of horizontal segment;

The physical property of rock and fluid is constant;

Horizontal segment is divided into N elementary section, and on same elementary section, steam evenly injects oil reservoir, and the steam absorbing amount of each infinitesimal section is not etc.;

Wet saturated steam is in outflow process, without vapor-liquid separation.

Average temperature computing unit 202, for adopting stratum heat and mass principle as constraints, according to the average temperature after basic well temperature data and each section of production fluid of stratum heat waste data calculated level well;

This unit comprises one first temperature computation subelement 2021, one second temperature computation subelement 2022, the 3rd temperature computation subelements 2023;

The first temperature computation subelement 2021 is for according to the average temperature of the non-vanishing elementary section of following formula calculation of steam mass dryness fraction:

Before steam quality is non-vanishing, after stewing well, the average temperature of each section of horizontal well is:

Wherein, 0.7 thermal efficiency that is oil reservoir; C _wfor saturated specific heat of water; C _rockfor the specific heat of rock; Q _ifor the inspiratory capacity of each section of horizontal well; Q _rockfor the quality of hot water in rock; Q _wfor the quality of hot water in hole; t _ifor the basic well temperature of each section; h _mifor the heat content of each section of wet saturated steam; I=1,2 ..., m-1; M is that steam quality is zero elementary section.

In this subelement, also comprise:

Heat content computing module, for calculate the heat content of each section of wet saturated steam according to following formula:

h _mi=(1-X _i)h _l+X _ih _g；

Wherein, X _ifor each section of inlet steam mass dryness fraction; h _gfor the heat content of saturated vapour; h _lfor the heat content of saturation water;

Hot water quality's computing module, for distinguish the quality of hot water in the quality of computing rock hot water and hole according to following formula:

Q _rock=(1-φ) π r _i ²l _i× ρ _rock;

Q _w=φπr _i ²l _i×ρ _w

φ is degree of porosity; l _ifor the length of each section; Ri is the Control Radius of the steam of each section; ρ _rockfor the density of rock; ρ _wfor the density of hot water in hole.

Mass dryness fraction computing module, for calculating the mass dryness fraction of each section:

Wherein, Q _alwaysthe heat containing for injecting total steam.

The second temperature computation subelement 2022, the average temperature of the elementary section that is zero for the following formula calculation of steam mass dryness fraction of basis:

After stewing well, the average temperature of each section of horizontal well is:

i=m, m+1 ..., N; Wherein, when Xi=0, the value of i is m.

The 3rd temperature computation subelement 2023, the average temperature for each section of calculated level well:

According to the sticky curve of temperature, the viscosity of each section is: μ _i=f (T _i);

The mobility of each section is: ${\mathrm{\λ}}_i=\frac{k_i}{{\mathrm{\μ}}_i};$

The production fluid amount of each section of horizontal well is:

$Q_{\mathrm{ci}}=Q_c\×\frac{{\mathrm{\λ}}_i}{\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\λ}}_j};$

Average temperature after each section of production fluid of horizontal well is:

T _i'=[(C _rock× Q _rock+ C _w× Q _water) × T _i-Q _ci× T _i× C _w]/{ (Q _rock+ Q _water) × [(1-φ) C _rock+ φ C _w];

Wherein, i=1,2 ..., N; N is the segments of horizontal well; Q _cfor total fluid production; k _ifor the permeability of each section of horizontal well.

Well temperature curve construction unit 203, for according to the average temperature after each section of production fluid of described horizontal well, constructs the theoretical well temperature of the round horizontal well curve of originally handling up;

Matching inverting unit 204, carries out matching for described the theoretical well temperature curve of the round horizontal well of handling up and this round are surveyed to well temperature curve, and carries out inverting according to the theoretical well temperature curve after matching, obtains the gas injection rate of each section of horizontal well.

The present invention can reach following beneficial effect: by considering historical well temperature, noting and adopt parameter influence, taking steam and fluid wellbore heat mass transfer rule as constraints, by certain bringing-up section suction vapour and production fluid parameter are adjusted, realization theory well temperature curve and the matching of measured curve phase, and then vapour intensity is inhaled in the segmentation of inverting horizontal segment, can evaluate horizontal segment producing status, analyze development degree, can instruct the adjustment of thick oil horizontal well technological measure and oil pool analysis.

Persons skilled in the art any not creative transformation of doing under this design philosophy, all should be considered as within protection scope of the present invention.

Claims (14)

1. thick oil horizontal well is inhaled a vapour status analysis method, it is characterized in that, comprising:

By horizontal well in segments, and the gas injection rate of given each section;

Adopt stratum heat and mass principle as constraints, according to the average temperature after basic well temperature data and each section of production fluid of stratum heat waste data calculated level well;

According to the average temperature after each section of production fluid of described horizontal well, construct the theoretical well temperature of the round horizontal well curve of originally handling up;

Described the theoretical well temperature curve of the round horizontal well of handling up and this round are surveyed to well temperature curve and carry out matching, and carry out inverting according to the theoretical well temperature curve after matching, obtain the gas injection rate of each section of horizontal well.

2. method as claimed in claim 1, is characterized in that, described according to stratum heat and mass principle, considers basic well temperature condition, the impact of stratum heat waste, and the average temperature of calculating each section of heating comprises:

Before steam quality is non-vanishing, after stewing well, the average temperature of each section of horizontal well is:

Wherein, 0.7 thermal efficiency that is oil reservoir; C _wfor saturated specific heat of water; C _rockfor the specific heat of rock; Q _ifor the inspiratory capacity of each section of horizontal well; Q _rockfor the quality of hot water in rock; Q _wfor the quality of hot water in hole; t _ifor the basic well temperature of each section; h _mifor the heat content of each section of wet saturated steam; I=1,2 ..., m-1; M is that steam quality is zero elementary section.

3. method as claimed in claim 2, is characterized in that:

h _mi=(1-X _i)h _l+X _ih _g；

Wherein, X _ifor each section of inlet steam mass dryness fraction; h _gfor the heat content of saturated vapour; h _lfor the heat content of saturation water;

Q _rock=(1-φ) π r _i ²l _i× ρ _rock;

Q _w=φπr _i ²l _i×ρ _w

φ is degree of porosity; l _ifor the length of each section; Ri is the Control Radius of the steam of each section; ρ _rockfor the density of rock; ρ _wfor the density of hot water in hole.

4. method as claimed in claim 3, is characterized in that:

Wherein, Q _alwaysthe heat containing for injecting total steam.

5. method as claimed in claim 4, is characterized in that:

If when Xi=0, the value of i is m, and after stewing well, the average temperature of each section of horizontal well is:

i=m, m+1 ..., N; M is that steam quality is zero elementary section, h _li-mit is the sequence number of hot water computing unit.

6. method as claimed in claim 5, is characterized in that:

According to the sticky curve of temperature, the viscosity of each section is: μ _i=f (T _i);

The mobility of each section is: ${\mathrm{\λ}}_i=\frac{k_i}{{\mathrm{\μ}}_i};$

The production fluid amount of each section of horizontal well is:

$Q_{\mathrm{ci}}=Q_c\×\frac{{\mathrm{\λ}}_i}{\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\λ}}_j};$

Average temperature after each section of production fluid of horizontal well is:

T _i'=[(C _rock× Q _rock+ C _w× Q _water) × T _i-Q _ci× T _i× C _w]/{ (Q _rock+ Q _water) × [(1-φ) C _rock+ φ C _w];

Wherein, i=1,2 ..., N; N is the segments of horizontal well; Q _cfor total fluid production; k _ifor the permeability of each section of horizontal well.

7. the method for claim 1, is characterized in that, described employing stratum heat and mass principle, as constraints, before the average temperature after basic well temperature data and each section of production fluid of stratum heat waste data calculated level well, also comprises:

Suppose mass flow Q, pressure P, the mass dryness fraction X of the stream-liquid two-phase flow of net horizontal section entrance ₀and temperature T _sfor known, and remain unchanged in whole steam injection process, whole horizontal segment keeps steady-flow;

In stratum, the heat transfer in the vertical cross section as for horizontal segment axis belongs to bidimensional Unsteady Heat Transfer;

In oil reservoir, the horizontal segment coefficient of heat conduction is radially infinitely great, is zero along the axial coefficient of heat conduction of horizontal segment;

The physical property of rock and fluid is constant;

Horizontal segment is divided into N elementary section, and on same elementary section, steam evenly injects oil reservoir, and the steam absorbing amount of each infinitesimal section is not etc.;

Wet saturated steam is in outflow process, without vapor-liquid separation.

8. thick oil horizontal well is inhaled a vapour status analysis system, it is characterized in that, comprising:

Initialization unit, for by horizontal well in segments, and the gas injection rate of given each section;

Average temperature computing unit, for adopting stratum heat and mass principle as constraints, according to the average temperature after basic well temperature data and each section of production fluid of stratum heat waste data calculated level well;

Well temperature curve construction unit, for according to the average temperature after each section of production fluid of described horizontal well, constructs the theoretical well temperature of the round horizontal well curve of originally handling up;

Matching inverting unit, carries out matching for described the theoretical well temperature curve of the round horizontal well of handling up and this round are surveyed to well temperature curve, and carries out inverting according to the theoretical well temperature curve after matching, obtains the gas injection rate of each section of horizontal well.

9. system as claimed in claim 8, is characterized in that, described average temperature computing unit comprises one first temperature computation subelement, for according to the average temperature of the non-vanishing elementary section of following formula calculation of steam mass dryness fraction:

Before steam quality is non-vanishing, after stewing well, the average temperature of each section of horizontal well is:

Wherein, 0.7 thermal efficiency that is oil reservoir; C _wfor saturated specific heat of water; C _rockfor the specific heat of rock; Q _ifor the inspiratory capacity of each section of horizontal well; Q _rockfor the quality of hot water in rock; Q _wfor the quality of hot water in hole; t _ifor the basic well temperature of each section; h _mifor the heat content of each section of wet saturated steam; I=1,2 ..., m-1; M is that steam quality is zero elementary section.

10. system as claimed in claim 9, is characterized in that, described the first temperature computation subelement comprises:

Heat content computing module, for calculate the heat content of each section of wet saturated steam according to following formula:

h _mi=(1-X _i)h _l+X _ih _g；

Wherein, X _ifor each section of inlet steam mass dryness fraction; h _gfor the heat content of saturated vapour; h _lfor the heat content of saturation water;

Hot water quality's computing module, for distinguish the quality of hot water in the quality of computing rock hot water and hole according to following formula:

Q _rock=(1-φ) π r _i ²l _i× ρ _rock;

Q _w=φπr _i ²l _i×ρ _w

φ is degree of porosity; l _ifor the length of each section; Ri is the Control Radius of the steam of each section; ρ _rockfor the density of rock; ρ _wfor the density of hot water in hole.

11. systems as claimed in claim 10, is characterized in that, in described the first temperature computation subelement, also comprise mass dryness fraction computing module, for calculating the mass dryness fraction of each section:

Wherein, Q _alwaysthe heat containing for injecting total steam.

12. systems as claimed in claim 11, is characterized in that, also comprise one second temperature computation subelement in described average temperature computing unit, the average temperature of the elementary section that is zero for the following formula calculation of steam mass dryness fraction of basis:

After stewing well, the average temperature of each section of horizontal well is:

i=m, m+1 ..., N; Wherein, when Xi=0, the value of i is m.

13. systems as claimed in claim 12, is characterized in that, also comprise one the 3rd temperature computation subelement, the average temperature for each section of calculated level well in described average temperature computing unit:

According to the sticky curve of temperature, the viscosity of each section is: μ _i=f (T _i);

The mobility of each section is: ${\mathrm{\λ}}_i=\frac{k_i}{{\mathrm{\μ}}_i};$

The production fluid amount of each section of horizontal well is:

$Q_{\mathrm{ci}}=Q_c\×\frac{{\mathrm{\λ}}_i}{\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\λ}}_j};$

Average temperature after each section of production fluid of horizontal well is:

T _i'=[(C _rock× Q _rock+ C _w× Q _water) × T _i-Q _ci× T _i× C _w]/{ (Q _rock+ Q _water) × [(1-φ) C _rock+ φ C _w];

Wherein, i=1,2 ..., N; N is the segments of horizontal well; Q _cfor total fluid production; k _ifor the permeability of each section of horizontal well.

14. systems as claimed in claim 8, is characterized in that, described initialization unit comprises setting parameter subelement, for:

Set mass flow Q, pressure P, the mass dryness fraction X of the stream-liquid two-phase flow of net horizontal section entrance ₀and temperature T _s, and remain unchanged in whole steam injection process, whole horizontal segment keeps steady-flow;

In stratum, the heat transfer in the vertical cross section as for horizontal segment axis belongs to bidimensional Unsteady Heat Transfer;

In oil reservoir, the horizontal segment coefficient of heat conduction is radially infinitely great, is zero along the axial coefficient of heat conduction of horizontal segment;

The physical property of rock and fluid is constant;

Horizontal segment is divided into N elementary section, and on same elementary section, steam evenly injects oil reservoir, and the steam absorbing amount of each infinitesimal section is not etc.;

Wet saturated steam is in outflow process, without vapor-liquid separation.

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