CN102758617A - Method for carrying out temperature fine well logging by utilizing distributed optical fiber - Google Patents

Method for carrying out temperature fine well logging by utilizing distributed optical fiber Download PDF

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Publication number
CN102758617A
CN102758617A CN2011101046545A CN201110104654A CN102758617A CN 102758617 A CN102758617 A CN 102758617A CN 2011101046545 A CN2011101046545 A CN 2011101046545A CN 201110104654 A CN201110104654 A CN 201110104654A CN 102758617 A CN102758617 A CN 102758617A
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temperature
analysis
oil
carry out
stratum
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黄正宇
许玉春
荣宁
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KUNSHAN LANLING TECHNOLOGY Co Ltd
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KUNSHAN LANLING TECHNOLOGY Co Ltd
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Abstract

The invention discloses a method for carrying out temperature fine well logging by utilizing a distributed optical fiber, relating to a well logging method. The method for carrying out temperature fine well logging by utilizing a distributed optical fiber comprises the following steps of: (1) testing data by utilizing optical fiber test equipment; (2) measuring temperature gradient of stratum; (3) carrying out fine comparative analysis; (4) carrying out fine analysis by utilizing comparison on analysis results; (5) analyzing physical form of the stratum; (6) eliminating misjudgement caused by simple analysis which adopts a temperature differential method; (7) judging flow velocity of fluid of an oil water layer; and (8) obtaining complete diagnosis result of a stratum single layer system. The method disclosed by the invention has the advantages that: on the basis of stratum energy analysis, a potential oil gas layer can be found by comparing with the previous logging information; and history data required by oil reservoir monitoring of a whole block is acquired, accuracy of numerical reservoir simulation is improved, interpretation error is reduced, and geological parameters can be accurately interpreted.

Description

Utilize distribution type fiber-optic to carry out the method for the meticulous well logging of temperature
Technical field
The present invention relates to a kind of method of well logging, a kind of specifically method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature.
Background technology
Oil field development will often be tested and carry out zonal testing and section plane test, and present test data is explained and existed error big, to producing the misleading effect that has part.The temperature logging technology was electronic instrument in the past, can't realize remote continuous temperature test, even the well logging of the fiber optic temperature of DTS also only is test data at present, did not carry out other stratum characteristic analysis.Only stay in test phase.
Also not having a kind of measuring method can reduce the explanation error effectively at present, when explaining geologic parameter more accurately, can also be main with the stratum energy analysis, and the well-log information before the contrast can find potential oil-gas Layer.And simultaneously the profit distribution situation of producing zone is analyzed, think that the optimization of production decision provides foundation.
Summary of the invention
The purpose of this invention is to provide the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature; This method can reach the DTS optical fiber temperature-measurement technology of utilizing; Can carry out meticulous explanation to the geology substratum, with the discovery of carrying out the potential hydrocarbon layer and the analysis of causes of production problem.For the needed dynamic 3 D numerical simulation of oilfield planning provides accurately objectively historical data.Also can carry out the vertical meticulous explanation of individual layer.Just solved the geology monitoring difficult problem in digitlization oil field.Also while production technology personnel dynamically produce to analyze has had " eyes ".Make the measure decision-making improve success rate, shortened the time of measure enforcement and measure decision-making greatly, thereby improved operating efficiency and measure success rate.With the stratum energy analysis is main, and the well-log information before the contrast can find potential oil-gas Layer.And simultaneously the profit distribution situation of producing zone is analyzed, think that the optimization of production decision provides foundation.Solved production test, like pressure buildup test, casing damage test etc. have solved the needed historical data of reservoir monitoring of block integral again, have improved the degree of accuracy of reservoir numerical simulation greatly.Reduce and explain error, explain geologic parameter more accurately.
According to first aspect present invention, provide a kind of method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature to it is characterized in that this logging method comprises the steps:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition,, measure the temperature gradient on stratum, to distinguish the loss difference of stratum substratum energy through the temperature gradient analytic approach;
(3) utilize the cross-sectional data of above-mentioned acquisition,, the oil-gas Layer energy state difference on stratum is carried out meticulous comparative analysis through relative temperature gradient analysis method;
(4) utilize (2) and the analysis result of (3) to compare, can carry out the judgement of oil-water-layer capacity volume variance, simultaneously oil reservoir and water layer are discerned, carry out explication de texte the geology substratum;
(5) utilize the cross-sectional data of above-mentioned acquisition, through temperature difference analytic approach, the formation temperature that convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is analyzed;
(6) utilize the cross-sectional data of above-mentioned acquisition, through relative temperature difference gradient analysis method over the ground the moving situation of laminar flow carry out finer comparative analysis, to eliminate the erroneous judgement that simple temperature differential method analysis is caused;
(7) utilize (5) and the analysis result of (6) to compare, can carry out explication de texte to the flow condition of substratum, promptly the flow condition to the oil-water-layer of different layers carries out labor, and the oil-water-layer rate of flow of fluid is judged;
(8) utilize (4) and the mutual again comparative analysis of the analysis result of (7), obtain the diagnostic result of a complete little layer system of geology, for the field produces exploitation provides the measure foundation.
Wherein, the described method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature is characterized in that this logging method is used for a kind of of field produces oil well, water injection well and gas well.
Wherein, the described method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature is characterized in that this well logging carrier is the distribution type fiber-optic fiber plant, wherein accuracy of identification temperature spot scope at 1m between the 2m.
Wherein, the described method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature is characterized in that simultaneously oil reservoir and water layer being discerned being the geology substratum is carried out the judgement of oil-water-layer capacity volume variance, and the concrete steps of carrying out explication de texte are:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition,, measure the temperature gradient on stratum, to distinguish the loss difference of stratum substratum energy through the temperature gradient analytic approach;
(3) utilize the cross-sectional data of above-mentioned acquisition,, the oil-gas Layer energy state difference on stratum is carried out meticulous comparative analysis through relative temperature gradient analysis method;
(4) utilize (2) and the analysis result of (3) to compare, can carry out the judgement of oil-water-layer capacity volume variance, simultaneously oil reservoir and water layer are discerned, carry out explication de texte the geology substratum.
Wherein, the described method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature is characterized in that to being the flow condition of the oil-water-layer of different layers being carried out labor, and the oil-water-layer rate of flow of fluid judges that the concrete steps that draw judged result are:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition, through temperature difference analytic approach, the formation temperature that convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is analyzed;
(3) utilize the cross-sectional data of above-mentioned acquisition, through relative temperature difference gradient analysis method over the ground the moving situation of laminar flow carry out finer comparative analysis, to eliminate the erroneous judgement that simple temperature differential method analysis is caused;
(4) utilize (2) and the analysis result of (3) to compare, can carry out explication de texte to the flow condition of substratum, promptly the flow condition to the oil-water-layer of different layers carries out labor, and the oil-water-layer rate of flow of fluid is judged and drawn judged result.
Wherein, the described method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature is characterized in that: in the loss difference step of distinguishing stratum substratum energy, the formula of said temperature gradient analytic approach is:
dT = ∂ Ti ∂ h ii
DT is certain any temperature gradient in the formula, T iBe certain any temperature, h iBe certain any degree of depth.
Wherein, the described method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature is characterized in that: the oil-gas Layer energy state difference on stratum is carried out in the meticulous comparative analysis step, and the formula of said relative temperature gradient analysis method is:
dT 0 = ∂ T n ∂ h n
DT in the formula 0For from h 0Beginning, relative temperature gradient, T nBe degree of depth h temperature, h nBe relative depth.
Wherein, the described method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature is characterized in that: the formation temperature that convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is carried out in the analytical procedure, and the formula of said temperature difference analytic approach is:
ΔT＝T hi-Th (i-1)
Δ T is the temperature difference in the formula, T HiBe T HiTemperature, T H (i-1)Be next-door neighbour T HiTemperature.
Wherein, The described method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature; It is characterized in that: the moving situation of laminar flow is carried out finer comparative analysis over the ground, and in the step of eliminating the erroneous judgement that simple temperature differential method analysis caused, the formula of said temperature gradient analytic approach is:
ΔT d＝(T hi-T h(i-1))/(h i-h (i-1))
Δ T in the formula dBe temperature gradient, T HiBe T HiTemperature, T H (i-1)Be next-door neighbour T HiTemperature, h iBe h iDepth value, h (i-1)Be next-door neighbour h iThe depth value of top point.
Superiority of the present invention is: compared with prior art, this method can reach the DTS optical fiber temperature-measurement technology utilized, and can carry out meticulous explanation to the geology substratum, with the discovery of carrying out the potential hydrocarbon layer and the analysis of causes of production problem.For the needed dynamic 3 D numerical simulation of oilfield planning provides accurately objectively historical data.Also can carry out the vertical meticulous explanation of individual layer.Just solved the geology monitoring difficult problem in digitlization oil field.Also while production technology personnel dynamically produce to analyze has had " eyes ".Make the measure decision-making improve success rate, shortened the time of measure enforcement and measure decision-making greatly, thereby improved operating efficiency and measure success rate.With the stratum energy analysis is main, and the well-log information before the contrast can find potential oil-gas Layer.And simultaneously the profit distribution situation of producing zone is analyzed, think that the optimization of production decision provides foundation.Solved production test, like pressure buildup test, casing damage test etc. have solved the needed historical data of reservoir monitoring of block integral again, have improved the degree of accuracy of reservoir numerical simulation greatly.Reduce and explain error, explain geologic parameter more accurately.
The specific embodiment
Be a preferred embodiment of the present invention will be described in detail below, should be appreciated that following illustrated preferred embodiment only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Embodiment 1: the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature of the present invention; This method can reach the DTS optical fiber temperature-measurement technology of utilizing; Can carry out meticulous explanation to the geology substratum, with the discovery of carrying out the potential hydrocarbon layer and the analysis of causes of production problem.For the needed dynamic 3 D numerical simulation of oilfield planning provides accurately objectively historical data.Also can carry out the vertical meticulous explanation of individual layer.Just solved the geology monitoring difficult problem in digitlization oil field.Also while production technology personnel dynamically produce to analyze has had " eyes ".Make the measure decision-making improve success rate, shortened the time of measure enforcement and measure decision-making greatly, thereby improved operating efficiency and measure success rate.With the stratum energy analysis is main, and the well-log information before the contrast can find potential oil-gas Layer.And simultaneously the profit distribution situation of producing zone is analyzed, think that the optimization of production decision provides foundation.Solved production test, like pressure buildup test, casing damage test etc. have solved the needed historical data of reservoir monitoring of block integral again, have improved the degree of accuracy of reservoir numerical simulation greatly.Reduce and explain error, explain geologic parameter more accurately.
According to first aspect present invention, provide a kind of method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature to it is characterized in that this logging method comprises the steps:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition,, measure the temperature gradient on stratum, to distinguish the loss difference of stratum substratum energy through the temperature gradient analytic approach;
(3) utilize the cross-sectional data of above-mentioned acquisition,, the oil-gas Layer energy state difference on stratum is carried out meticulous comparative analysis through relative temperature gradient analysis method;
(4) utilize (2) and the analysis result of (3) to compare, can carry out the judgement of oil-water-layer capacity volume variance, simultaneously oil reservoir and water layer are discerned, carry out explication de texte the geology substratum;
(5) utilize the cross-sectional data of above-mentioned acquisition, through temperature difference analytic approach, the formation temperature that convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is analyzed;
(6) utilize the cross-sectional data of above-mentioned acquisition, through relative temperature difference gradient analysis method over the ground the moving situation of laminar flow carry out finer comparative analysis, to eliminate the erroneous judgement that simple temperature differential method analysis is caused;
(7) utilize (5) and the analysis result of (6) to compare, can carry out explication de texte to the flow condition of substratum, promptly the flow condition to the oil-water-layer of different layers carries out labor, and the oil-water-layer rate of flow of fluid is judged;
(8) utilize (4) and the mutual again comparative analysis of the analysis result of (7), obtain the diagnostic result of a complete little layer system of geology, for the field produces exploitation provides the measure foundation.
During practical implementation, described this logging method is used for a kind of of field produces oil well, water injection well and gas well.
During practical implementation, described this well logging carrier is the distribution type fiber-optic fiber plant, and wherein the accuracy of identification temperature spot is 1m.
During practical implementation, describedly simultaneously oil reservoir and water layer are discerned being the geology substratum is carried out the judgement of oil-water-layer capacity volume variance, the concrete steps of carrying out explication de texte are:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition,, measure the temperature gradient on stratum, to distinguish the loss difference of stratum substratum energy through the temperature gradient analytic approach;
(3) utilize the cross-sectional data of above-mentioned acquisition,, the oil-gas Layer energy state difference on stratum is carried out meticulous comparative analysis through relative temperature gradient analysis method;
(4) utilize (2) and the analysis result of (3) to compare, can carry out the judgement of oil-water-layer capacity volume variance, simultaneously oil reservoir and water layer are discerned, carry out explication de texte the geology substratum.
During practical implementation, describedly to being the flow condition of the oil-water-layer of different layers is carried out labor, the oil-water-layer rate of flow of fluid judges that the concrete steps that draw judged result are:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition, through temperature difference analytic approach, the formation temperature that convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is analyzed;
(3) utilize the cross-sectional data of above-mentioned acquisition, through relative temperature difference gradient analysis method over the ground the moving situation of laminar flow carry out finer comparative analysis, to eliminate the erroneous judgement that simple temperature differential method analysis is caused;
(4) utilize (2) and the analysis result of (3) to compare, can carry out explication de texte to the flow condition of substratum, promptly the flow condition to the oil-water-layer of different layers carries out labor, and the oil-water-layer rate of flow of fluid is judged and drawn judged result.
During practical implementation, described in the loss difference step of distinguishing stratum substratum energy, the formula of said temperature gradient analytic approach is:
dT = ∂ Ti ∂ h ii
DT is certain any temperature gradient in the formula, T iBe certain any temperature, h iBe certain any degree of depth.
During practical implementation, described oil-gas Layer energy state difference to the stratum is carried out in the meticulous comparative analysis step, and the formula of said relative temperature gradient analysis method is:
dT 0 = ∂ T n ∂ h n
DT in the formula 0For from h 0Beginning, relative temperature gradient, T nBe degree of depth h temperature, h nBe relative depth.
During practical implementation, the formation temperature that described convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is carried out in the analytical procedure, and the formula of said temperature difference analytic approach is:
ΔT＝T hi-Th (i-1)
Δ T is the temperature difference in the formula, T HiBe T HiTemperature, T H (i-1)Be next-door neighbour T HiTemperature.
During practical implementation, the moving situation of described laminar flow is over the ground carried out finer comparative analysis, and in the step of eliminating the erroneous judgement that simple temperature differential method analysis caused, the formula of said temperature gradient analytic approach is:
ΔT d＝(T hi-T h(i-1))/(h i-h (i-1))
Δ T in the formula dBe temperature gradient, T HiBe T HiTemperature, T H (i-1)Be next-door neighbour T HiTemperature, h iBe h iDepth value, h (i-1)Be next-door neighbour h iThe depth value of top point.
Embodiment 2: the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature of the present invention, this logging method comprises the steps:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition,, measure the temperature gradient on stratum, to distinguish the loss difference of stratum substratum energy through the temperature gradient analytic approach;
(3) utilize the cross-sectional data of above-mentioned acquisition,, the oil-gas Layer energy state difference on stratum is carried out meticulous comparative analysis through relative temperature gradient analysis method;
(4) utilize (2) and the analysis result of (3) to compare, can carry out the judgement of oil-water-layer capacity volume variance, simultaneously oil reservoir and water layer are discerned, carry out explication de texte the geology substratum;
(5) utilize the cross-sectional data of above-mentioned acquisition, through temperature difference analytic approach, the formation temperature that convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is analyzed;
(6) utilize the cross-sectional data of above-mentioned acquisition, through relative temperature difference gradient analysis method over the ground the moving situation of laminar flow carry out finer comparative analysis, to eliminate the erroneous judgement that simple temperature differential method analysis is caused;
(7) utilize (5) and the analysis result of (6) to compare, can carry out explication de texte to the flow condition of substratum, promptly the flow condition to the oil-water-layer of different layers carries out labor, and the oil-water-layer rate of flow of fluid is judged;
(8) utilize (4) and the mutual again comparative analysis of the analysis result of (7), obtain the diagnostic result of a complete little layer system of geology, for the field produces exploitation provides the measure foundation.
During practical implementation, described this logging method is used for a kind of of field produces oil well, water injection well and gas well.
During practical implementation, described this well logging carrier is the distribution type fiber-optic fiber plant, and wherein the accuracy of identification temperature spot is 2m.
During practical implementation, describedly simultaneously oil reservoir and water layer are discerned being the geology substratum is carried out the judgement of oil-water-layer capacity volume variance, the concrete steps of carrying out explication de texte are:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition,, measure the temperature gradient on stratum, to distinguish the loss difference of stratum substratum energy through the temperature gradient analytic approach;
(3) utilize the cross-sectional data of above-mentioned acquisition,, the oil-gas Layer energy state difference on stratum is carried out meticulous comparative analysis through relative temperature gradient analysis method;
(4) utilize (2) and the analysis result of (3) to compare, can carry out the judgement of oil-water-layer capacity volume variance, simultaneously oil reservoir and water layer are discerned, carry out explication de texte the geology substratum.
During practical implementation, describedly to being the flow condition of the oil-water-layer of different layers is carried out labor, the oil-water-layer rate of flow of fluid judges that the concrete steps that draw judged result are:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition, through temperature difference analytic approach, the formation temperature that convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is analyzed;
(3) utilize the cross-sectional data of above-mentioned acquisition, through relative temperature difference gradient analysis method over the ground the moving situation of laminar flow carry out finer comparative analysis, to eliminate the erroneous judgement that simple temperature differential method analysis is caused;
(4) utilize (2) and the analysis result of (3) to compare, can carry out explication de texte to the flow condition of substratum, promptly the flow condition to the oil-water-layer of different layers carries out labor, and the oil-water-layer rate of flow of fluid is judged and drawn judged result.
During practical implementation, described in the loss difference step of distinguishing stratum substratum energy, the formula of said temperature gradient analytic approach is:
dT = ∂ Ti ∂ h ii
DT is certain any temperature gradient in the formula, T iBe certain any temperature, h iBe certain any degree of depth.
During practical implementation, described oil-gas Layer energy state difference to the stratum is carried out in the meticulous comparative analysis step, and the formula of said relative temperature gradient analysis method is:
dT 0 = ∂ T n ∂ h n
DT in the formula 0For from h 0Beginning, relative temperature gradient, T nBe degree of depth h temperature, h nBe relative depth.
During practical implementation, the formation temperature that described convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is carried out in the analytical procedure, and the formula of said temperature difference analytic approach is:
ΔT＝T hi-Th (i-1)
Δ T is the temperature difference in the formula, T HiBe T HiTemperature, T H (i-1)Be next-door neighbour T HiTemperature.
During practical implementation, the moving situation of described laminar flow is over the ground carried out finer comparative analysis, and in the step of eliminating the erroneous judgement that simple temperature differential method analysis caused, the formula of said temperature gradient analytic approach is:
ΔT d＝(T hi-T h(i-1))/(h i-h (i-1))
Δ T in the formula dBe temperature gradient, T HiBe T HiTemperature, T H (i-1)Be next-door neighbour T HiTemperature, h iBe h iDepth value, h (i-1)Be next-door neighbour h iThe depth value of top point.
Superiority of the present invention is: compared with prior art, this method can reach the DTS optical fiber temperature-measurement technology utilized, and can carry out meticulous explanation to the geology substratum, with the discovery of carrying out the potential hydrocarbon layer and the analysis of causes of production problem.For the needed dynamic 3 D numerical simulation of oilfield planning provides accurately objectively historical data.Also can carry out the vertical meticulous explanation of individual layer.Just solved the geology monitoring difficult problem in digitlization oil field.Also while production technology personnel dynamically produce to analyze has had " eyes ".Make the measure decision-making improve success rate, shortened the time of measure enforcement and measure decision-making greatly, thereby improved operating efficiency and measure success rate.With the stratum energy analysis is main, and the well-log information before the contrast can find potential oil-gas Layer.And simultaneously the profit distribution situation of producing zone is analyzed, think that the optimization of production decision provides foundation.Solved production test, like pressure buildup test, casing damage test etc. have solved the needed historical data of reservoir monitoring of block integral again, have improved the degree of accuracy of reservoir numerical simulation greatly.Reduce and explain error, explain geologic parameter more accurately.
Although preceding text specify the present invention, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention all are to be understood that to falling into protection scope of the present invention.

Claims (9)

1. a method of utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature is characterized in that this logging method comprises the steps:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition,, measure the temperature gradient on stratum, to distinguish the loss difference of stratum substratum energy through the temperature gradient analytic approach;
(3) utilize the cross-sectional data of above-mentioned acquisition,, the oil-gas Layer energy state difference on stratum is carried out meticulous comparative analysis through relative temperature gradient analysis method;
(4) utilize (2) and the analysis result of (3) to compare, can carry out the judgement of oil-water-layer capacity volume variance, simultaneously oil reservoir and water layer are discerned, carry out explication de texte the geology substratum;
(5) utilize the cross-sectional data of above-mentioned acquisition, through temperature difference analytic approach, the formation temperature that convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is analyzed;
(6) utilize the cross-sectional data of above-mentioned acquisition, through relative temperature difference gradient analysis method over the ground the moving situation of laminar flow carry out finer comparative analysis, to eliminate the erroneous judgement that simple temperature differential method analysis is caused;
(7) utilize (5) and the analysis result of (6) to compare, can carry out explication de texte to the flow condition of substratum, promptly the flow condition to the oil-water-layer of different layers carries out labor, and the oil-water-layer rate of flow of fluid is judged;
(8) utilize (4) and the mutual again comparative analysis of the analysis result of (7), obtain the diagnostic result of a complete little layer system of geology, for the field produces exploitation provides the measure foundation.
2. the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature according to claim 1 is characterized in that this logging method is used for a kind of of field produces oil well, water injection well and gas well.
3. the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature according to claim 1 is characterized in that this well logging carrier is the distribution type fiber-optic fiber plant, wherein accuracy of identification temperature spot scope at 1m between the 2m.
4. the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature according to claim 1; It is characterized in that being the geology substratum is carried out the judgement of oil-water-layer capacity volume variance; Simultaneously oil reservoir and water layer are discerned, the concrete steps of carrying out explication de texte are:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition,, measure the temperature gradient on stratum, to distinguish the loss difference of stratum substratum energy through the temperature gradient analytic approach;
(3) utilize the cross-sectional data of above-mentioned acquisition,, the oil-gas Layer energy state difference on stratum is carried out meticulous comparative analysis through relative temperature gradient analysis method;
(4) utilize (2) and the analysis result of (3) to compare, can carry out the judgement of oil-water-layer capacity volume variance, simultaneously oil reservoir and water layer are discerned, carry out explication de texte the geology substratum.
5. the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature according to claim 1; It is characterized in that to being the flow condition of the oil-water-layer of different layers being carried out labor, the oil-water-layer rate of flow of fluid judges that the concrete steps that draw judged result are:
(1) utilizes DTS optical fiber test equipment test oil well formation temperature cross-sectional data;
(2) utilize the cross-sectional data of above-mentioned acquisition, through temperature difference analytic approach, the formation temperature that convection cell causes changes and carries out analytical analysis, and the physical aspect on stratum is analyzed;
(3) utilize the cross-sectional data of above-mentioned acquisition, through relative temperature difference gradient analysis method over the ground the moving situation of laminar flow carry out finer comparative analysis, to eliminate the erroneous judgement that simple temperature differential method analysis is caused;
(4) utilize (2) and the analysis result of (3) to compare, can carry out explication de texte to the flow condition of substratum, promptly the flow condition to the oil-water-layer of different layers carries out labor, and the oil-water-layer rate of flow of fluid is judged and drawn judged result.
6. the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature according to claim 1 is characterized in that: in the loss difference step of distinguishing stratum substratum energy, the formula of said temperature gradient analytic approach is:
dT = ∂ Ti ∂ h ii
DT is certain any temperature gradient in the formula, T iBe certain any temperature, h iBe certain any degree of depth.
7. the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature according to claim 1 is characterized in that: the oil-gas Layer energy state difference on stratum is carried out in the meticulous comparative analysis step, and the formula of said relative temperature gradient analysis method is:
dT 0 = ∂ T n ∂ h n
DT in the formula 0For from h 0Beginning, relative temperature gradient, T nBe degree of depth h temperature, h nBe relative depth.
8. the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature according to claim 1; It is characterized in that: the formation temperature that convection cell causes changes and carries out analytical analysis; The physical aspect on stratum is carried out in the analytical procedure, and the formula of said temperature difference analytic approach is:
ΔT＝T hi-Th (i-1)
Δ T is the temperature difference in the formula, T HiBe T HiTemperature, T H (i-1)Be next-door neighbour T HiTemperature.
9. the method for utilizing distribution type fiber-optic to carry out the meticulous well logging of temperature according to claim 1; It is characterized in that: the moving situation of laminar flow is carried out finer comparative analysis over the ground; In the step of eliminating the erroneous judgement that simple temperature differential method analysis caused, the formula of said temperature gradient analytic approach is:
ΔT d＝(T hi-T h(i-1))/(h i-h (i-1))
Δ T in the formula dBe temperature gradient, T HiBe T HiTemperature, T H (i-1)Be next-door neighbour T HiTemperature, h iBe h iDepth value, h (i-1)Be next-door neighbour h iThe depth value of top point.
CN2011101046545A 2011-04-26 2011-04-26 Method for carrying out temperature fine well logging by utilizing distributed optical fiber Pending CN102758617A (en)

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Application publication date: 20121031