US3909603A
Expired / Lapsed
US
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Method of processing production well logging data
Assignee: Schlumberger Technology Corp
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Filing: 1971-08-11
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Granted: 1975-09-30
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Expires: 1991-08-11
Abstract
Abstract In accordance with an illustrative embodiment of the present invention, a method is disclosed for processing production logging data in order to determine, in a two-phase, water-oil, flow, the flowrate of one of the phases at different depths of a production well. At each depth, data representative of the total flowrate and of the proportion of total cross section of pipe occupied by one of the phases, designated ''''hold up,'''' is generated. For each depth, the slippage velocity between the two phases is computed from the data representative of hold up and of a parameter which is a function of the difference in density between the two phases. The flowrate of each phase is then computed from the previously computed values of slippage velocity and from the data representative of total flowrate and hold-up. This method gives precise quantitative data making it possible to determine the operations required to improve the production of the well.
Inventors
- 👤 Yves Nicolas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:44
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; G; G01; G01F; G01F1/00; G01F1/74
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
105 words
A method of machine processing well logging data, comprising: deriving a measurement representative of the proportion of one phase of a multiple phase flow in a well at a selected depth level; deriving a measurement representative of the total rate of flow of the fluid in a well at said selected depth level; and combining with a machine said derived measurements with a predetermined value of the apparent difference in density between two phases of said multiple phase flow to produce a representation of the flow rate of at leasT one phase of said multiple phase flow at said selected depth level in a well.
Claim 2
Independent Claim
105 words
A method of machine processing well logging data, comprising: deriving a measurement representative of the proportion of one phase of a multiple phase flow in a well at a selected depth level; deriving a measurement representative of the total rate of flow of the fluid in a well at said selected depth level; and combining with a machine said derived measurements with a predetermined value of the apparent difference in density between two phases of said multiple phase flow to produce a representation of the flow rate of at leasT one phase of said multiple phase flow at said selected depth level in a well.
Claim 3
Dependent Claim
52 words
The method of claim 1 wherein the step of combining includes combining said phase proportion measurement with said predetermined density difference value to compute a representation of the difference in velocity between said two phases, and combining said representation of velocity difference with said derived measurements to produce said flow rate representation.
Claim 4
Independent Claim
132 words
A method of machine processing well logging data to determine in a two phase, water, oil flow through a conduit, the flow rate of at least one phase wherein a value of the apparent difference in density between said water and oil is predetermined before processing data, comprising: deriving a measurement representative of the proportion of one phase of said two phase flow in a well at a selected depth level; deriving a measurement representative of the total rate of flow of the fluid in a well at said selected depth level; and combining with a machine said derived measurements with said predetermined density difference value to produce a representation of the flow rate of at least one phase of said two phase flow at said selected depth level in a well.
Claim 5
Independent Claim
132 words
A method of machine processing well logging data to determine in a two phase, water, oil flow through a conduit, the flow rate of at least one phase wherein a value of the apparent difference in density between said water and oil is predetermined before processing data, comprising: deriving a measurement representative of the proportion of one phase of said two phase flow in a well at a selected depth level; deriving a measurement representative of the total rate of flow of the fluid in a well at said selected depth level; and combining with a machine said derived measurements with said predetermined density difference value to produce a representation of the flow rate of at least one phase of said two phase flow at said selected depth level in a well.
Claim 6
Dependent Claim
51 words
The method of claim 3 wherein the step of combining includes combining said phase proportion measurement with said predetermined density difference value to compute a representation of the difference in velocity between said two phases, and combining said representation of velocity difference with said derived measurements to produce said flowrate representation.
Claim 7
Dependent Claim
20 words
The method of claim 4 wherein said phase proportion measurement is the proportion of water in said two phase flow.
Claim 8
Dependent Claim
34 words
The method of claim 5 wherein said water proportion measurement Yw is combined with said value of density difference Delta Rho '' to produce said velocity difference representation Vs in accordance with the expression:
Claim 9
Dependent Claim
92 words
The method of claim 6 wherein said representation Vs is combined with said flowrate measurement QT and said water phase proportion measurement Yw to produce a representation of the flowrate Qw of said water phase in accordance with the expression: Qw YwQT - Yw(1-Yw)A Vs (Qo (1-Yw)QT + Yw(1-Yw)A Vs ) where A is the internal area of the cross section of conduit through which said water oil passes, whereby the flowrate of said oil phase is represented by the difference between the measured total flowrate QT and the produced flowrate Qw.
Claim 10
Independent Claim
83 words
A method of machine processing well logging data, comprising: deriving a measurement representative of the proportion of one phase of a multiple phase flow in a well at a selected depth level; combining in a machine said derived measurement in conjunction with a predetermined value of the apparent difference in density between two phases of said flow to produce a representation of the difference in velocity between said two phases of said multiple phase flow at said selected depth level in a well.
Claim 11
Independent Claim
83 words
A method of machine processing well logging data, comprising: deriving a measurement representative of the proportion of one phase of a multiple phase flow in a well at a selected depth level; combining in a machine said derived measurement in conjunction with a predetermined value of the apparent difference in density between two phases of said flow to produce a representation of the difference in velocity between said two phases of said multiple phase flow at said selected depth level in a well.
Claim 12
Dependent Claim
28 words
The method of claim 8 wherein said two phases are water and oil and said phase proportion measurement is the proportion of water in said two phase flow.
Claim 13
Dependent Claim
35 words
The method of claim 9 wherein said water proportion measurement Yw is combined with said value of apparent density difference Delta Rho '' to produce said velocity difference representation Vs in accordance with the expression:
Claim 14
Dependent Claim
106 words
Apparatus for processing well logging data, comprising: means for deriving a measurement representative of the proportion of one phase of a multiple phase flow in a well at a selected depth level; means for deriving a measurement representative of the total rate of flow of the fluid in a well at said selected depth level; and means for combining said derived measurements with a predetermined value of the apparent difference in density between two phases of said multiple phase flow to produce a representation of the flow rate of at least one phase of said multiple phase flow at said selected depth level in a well.
Claim 15
Dependent Claim
106 words
Apparatus for processing well logging data, comprising: means for deriving a measurement representative of the proportion of one phase of a multiple phase flow in a well at a selected depth level; means for deriving a measurement representative of the total rate of flow of the fluid in a well at said selected depth level; and means for combining said derived measurements with a predetermined value of the apparent difference in density between two phases of said multiple phase flow to produce a representation of the flow rate of at least one phase of said multiple phase flow at said selected depth level in a well.
Claim 16
Dependent Claim
55 words
Apparatus as in claim 11 wherein the combining means include means for combining said phase proportion measurement with said predetermined density difference value to compute a representation of the difference in velocity between said two phases, and means for combing said representation of velocity difference with said derived measurements to produce said flow rate representation.
Claim 17
Dependent Claim
133 words
Apparatus for processing well logging data to determine in a two phase, water, oil flow through a conduit, the flow rate of at least one phase wherein a value of the apparent difference in density between said water and oil is predetermined before processing data, comprising: means for deriving a measurement representative of the proportion of one phase of said two phase flow in a well at a selected depth level; means for deriving a measurement representative of the total rate of flow of the fluid in a well at said selected depth level; and means for combining said derived measurements with said predetermined density difference value to produce a representation of the flow rate of at least one phase of said two phase flow at said selected depth level in a well.
Claim 18
Dependent Claim
133 words
Apparatus for processing well logging data to determine in a two phase, water, oil flow through a conduit, the flow rate of at least one phase wherein a value of the apparent difference in density between said water and oil is predetermined before processing data, comprising: means for deriving a measurement representative of the proportion of one phase of said two phase flow in a well at a selected depth level; means for deriving a measurement representative of the total rate of flow of the fluid in a well at said selected depth level; and means for combining said derived measurements with said predetermined density difference value to produce a representation of the flow rate of at least one phase of said two phase flow at said selected depth level in a well.
Claim 19
Dependent Claim
54 words
Apparatus as in claim 13 wherein the combining means include means for combining said phase proportion measurement with said predetermined density difference value to compute a representation of the difference in velocity between said two phases, and means for combining said representation of velocity difference with said derived measurements to produce said flowrate representation.
Claim 20
Dependent Claim
20 words
Apparatus as in claim 14 wherein said phase proportion measurement is the proportion of water in said two phase flow.
Claim 21
Dependent Claim
34 words
Apparatus as in claim 15 wherein said water proportion measurement Yw is combined with said value of density difference Delta Rho '' to produce said velocity difference representation Vs in accordance with the expression:
Claim 22
Dependent Claim
91 words
Apparatus as in claim 16 wherein said representation Vs is combined with said flowrate measurement QT and said water phase proportion measurement Yw to produce a representation of the flowrate Qw of said water phase in accordance with the expression: Qw YwQT - Yw(1-Yw)A Vs (Qo (1-Yw)QT - Yw(1-Yw)A Vs) where A is the internal area of the cross section of conduit through which said water-oil flow passes, whereby the flowrate of said oil phase is represented by the difference between the measured total flowrate QT and the produced flowrate Qw.
Claim 23
Dependent Claim
83 words
Apparatus for processing well logging data, comprising: means for deriving a measurement representative of the proportion of one Phase of a multiple phase flow in a well at a selected depth level; and means for utilizing said derived measurement in conjunction with a predetermined value of the apparent difference in density between two phases of said flow to produce a representation of the difference in velocity between said two phases of said multiple phase flow at said selected depth level in a well.
Claim 24
Dependent Claim
83 words
Apparatus for processing well logging data, comprising: means for deriving a measurement representative of the proportion of one Phase of a multiple phase flow in a well at a selected depth level; and means for utilizing said derived measurement in conjunction with a predetermined value of the apparent difference in density between two phases of said flow to produce a representation of the difference in velocity between said two phases of said multiple phase flow at said selected depth level in a well.
Claim 25
Dependent Claim
27 words
Apparatus as in claim 18 wherein two phases are water and oil and said phase proportion measurement is the proportion of water in said two phase flow.
Claim 26
Dependent Claim
37 words
Apparatus as in claim 19 wherein said water proportion measurement is Yw is combined with said value of apparent density difference Delta Rho '' to produce said velocity of difference representation Vs in accordance with the expression:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |