CN1051156C - Wave-guide measuring method for water-holding rate of oil well - Google Patents
Wave-guide measuring method for water-holding rate of oil well Download PDFInfo
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- CN1051156C CN1051156C CN93107982A CN93107982A CN1051156C CN 1051156 C CN1051156 C CN 1051156C CN 93107982 A CN93107982 A CN 93107982A CN 93107982 A CN93107982 A CN 93107982A CN 1051156 C CN1051156 C CN 1051156C
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- oil well
- water
- receiving antennas
- fluid
- emitting antenna
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Abstract
The present invention relates to a wave-guide measuring method for the water-holding rate of an oil well, which is characterized in that alternating current is transmitted by a transmitting antenna in an oil well, TE01 type transversal electric waves are generated in the oil well and are received by two receiving antennae, and the three antennae adopt the same dimension. According to signals received by the two receiving antennae, the amplitude difference and the phase difference of the signals are determined. Finally, according to the amplitude difference and the phase difference of the signals, an experimental diagram panel is checked, and the water-holding rate of the mixed fluid of the measuring point, namely the midpoint of the two receiving antennae can be obtained.
Description
The present invention relates to the measuring method of the interior fluid-mixing water holdup of oil well in a kind of oil exploitation.
The method of existing measurement oil well fluid-mixing water holdup in the oil exploitation mainly contains two kinds of capacitance method and low energy radioactivity methods.Capacitance method is the principle based on columnar capacitor, asks for water holdup by the electric capacity of measuring the fluid-mixing between insulation course and external polar plate.Because the water of oil reservoir output contains a certain amount of salt ion, when water holdup was higher, water can constitute external phase in the fluid-mixing, and the response that causes the electric capacity water cut meter is with complete basic identical when moisture, thereby can't survey its water holdup of standard.Low energy radioactivity method is to utilize oil, gas, water that the absorption characteristic difference of low-energy and X ray is measured water holdup.This measuring method must be taken a sample on the one hand, and the non-homogeneous mixing often of the fluid that flows in the oil well, be difficult to get the sample of moisture ratio on the reflection flow area, there is inevitable statistical error in radioactivity survey on the other hand, so this measuring method measuring accuracy is limited, effect is not good.Particularly enter the exploitation middle and later periods when the oil field, the water holdup in the oil well is very high, and current measuring methods and technology no longer are suitable for or lose usefulness.
The reliable measurements method of fluid-mixing water holdup in the oil well, not only need and in physics or chemical fundamentals, accurately to differentiate water and oil gas, and must be able in the oil well casing of the thousands of meters degree of depth, move instrument by cable the fluid under high temperature, the condition of high voltage is measured.The method and the technology of the moisture ratio of fluid-mixing in the existing measuring channel on the ground, the measuring sonde design that has is to be fixed in pipeline external surface, the measuring sonde design that has is (the U.S. 07/417 from pipeline external surface tubular stinger inner fluid, 658 patented claims have utilized this method), therefore can not be used for the measurement of water holdup in the oil well.
The object of the invention is to avoid above-mentioned the deficiencies in the prior art part, and a kind of method of utilizing fluid-mixing water holdup in the waveguide measurement oil well is provided.
Purpose of the present invention can reach by following approach: at first launch exchange current with an emitting antenna in oil well, thereby produce TE in oil well
O1The electromagnetic wave of pattern, the complex voltage that receives with two receiving antennas is obtained therebetween amplitude difference Δ A and phase differential ΔΦ then, at last according to Δ A and ΔΦ by checking the experiment plate, draw the water holdup of two receiving antenna midpoint fluid-mixings.
Purpose of the present invention can also realize by following technical measures: 1. emitting antenna and two receiving antennas adopt the banded breach antenna of same size, and emitting antenna equates with distance between two receiving antennas to the distance of first receiving antenna, is 0.05m; 2. the frequency of operation of emitting antenna is lower than the theoretical cutoff frequency F of guided wave in the oil well casing
c, and
, wherein μ, ε are respectively the magnetic permeability and the specific inductive capacity of oil well inner fluid medium, λ
c=2 π a/3.8317 are cutoff wavelength, and a is the oil well casing radius in the formula, the F of unit that each parameter is used
c-Hz (hertz), μ-H/m (henry/rice), ε-F/m (method/rice), a-m (rice); 3. the complex voltage V that receives according to two receiving antennas
1=V
R1+ iV
X1And V
2=V
R2+ iV
X2Obtaining its amplitude difference and phase differential is respectively:
, ΔΦ=tg
-1(V
X2/ V
R2)-tg
-1(V
X1/ V
R1), the V of unit that each parameter is used in the formula
Rl, V
X2, V
Xl, V
X2-V (volt), A-dB (decibel), Ф-deg. (angle); 4. according to the amplitude difference and the phase differential that measure, utilize the experiment plate to obtain the water holdup Y of fluid-mixing between two receiving antennas
w, and the experiment plate can obtain according to the measurement response of fluid-mixing under the water of different resistivity and the different oil-water ratios, and the horizontal ordinate of plate and ordinate are respectively amplitude difference Δ A, the phase difference Ф of measurement, and the modulus of curve is set at resistivity of water R in the plate
wWith water holdup Y
w, applying unit Δ A-dB (decibel), Δ Ф-deg. (angle), R
w-Ω m (ohm meter), Y
w-% (percentage).
Figure 1 shows that emitting antenna of the present invention and the receiving antenna position view in oil well.
Figure 2 shows that the present invention is used for determining the curve map of cutoff frequency.
Figure 3 shows that the present invention is used for asking for according to amplitude difference and phase differential the experiment plate of water holdup.
Advantage of the present invention is to measure the fluid on the whole flow area in the oil well, effectively differentiates water and oil Gas, the certainty of measurement height, reliability is strong, when particularly the specific retention of fluid-mixing is higher in the oil well, measures and divides Not only the ability of distinguishing can not descend, and also can strengthen on the contrary. By elaborating below in conjunction with accompanying drawing, can be right The present invention and advantage thereof obtain fully and comprehensively to be understood.
The sensor of wave-guide measuring method for water-holding rate of oil well is made up of emitting antenna and receiving antenna, and their positions in oil well as shown in Figure 1.5. the oil-well wall that iron and steel matter sleeve pipe constitutes among the figure, emitting antenna 1. with receiving antenna 2., 3. measure-alike, linearly distribute, place during measurement on the axial location in the oil well, measurement result is represented is the 4. fluid water holdup at place degree of depth place of mid point of two receiving antennas.In order to guarantee to measure the dielectric properties and the conduction property that can reflect the oil well inner fluid, guarantee to measure simultaneously and can in the limited oil well in space, realize that the frequency of operation of emitting antenna should be a little less than the theoretical cutoff frequency F of guided wave in the oil well casing
cF
cCan utilize Fig. 2 to find, the horizontal ordinate of figure is the interior diameter of oil well casing, adopts oil field inches commonly used to represent 1 inch=0.0254m; The ordinate of figure is a theoretical cutoff frequency, and unit is 10
9Hz; The modulus 1,2,5 of curve among the figure ... the 80th, the relative dielectric constant of in-hole fluid.For example, pipe diameter is 8 inches, and when the relative dielectric constant of fluid was 80, its cutoff frequency was 0.2 (10
9Hz).Behind the frequency of operation stimulated emission antenna generation useful signal of selecting to determine, two receiving antennas just can receive complex voltage, by circuitry for signal measurement, and the measurement response amplitude difference Δ A and the phase difference Ф that just can obtain exporting.Then, utilize and shown in Figure 3 ask for the experiment plate of water holdup, just can obtain the water holdup of fluid-mixing between two receiving antennas, and the mid point of selecting two receiving antennas is as fathoming measuring point according to amplitude difference and phase differential.For example, in the time of Δ A=30dB, Δ Ф=180 °, on Fig. 3, check in water holdup Y
w=90%.
Claims (1)
1. guide measuring method of in oil well, measuring the fluid-mixing water holdup, this method is used an emitting antenna and two receiving antennas, and emitting antenna and two receiving antennas are positioned on the same straight line, it is characterized in that:
1. emitting antenna and two receiving antennas adopt same size, and emitting antenna equates with distance between two receiving antennas to the distance of first receiving antenna, is 0.05m;
2. the frequency of operation of emitting antenna is lower than the theoretical cutoff frequency F of guided wave in the oil well casing
c:
Wherein μ, ε are respectively the magnetic permeability and the specific inductive capacity of oil well inner fluid medium, and
λ
c=2 π a/3.8317, a are the oil well casing radius; The F of unit that each parameter is used in the formula
c-Hz (hertz), μ-H/m (henry/rice), ε-F/m (method/rice), a-m (rice);
3. the complex voltage V that receives according to two receiving antennas
1And V
2:
V
1＝V
r1+iV
x1，
V
2=V
R2+ iV
X2, can obtain its amplitude difference Δ A and phase differential ΔΦ:
The V of unit that each parameter is used in the formula
R1, V
R2, V
X1, V
X2-V (volt), A-dB (decibel), Φ-deg. (angle);
4. according to the amplitude difference and the phase differential that measure, utilize the experiment plate to obtain the water holdup Y of fluid-mixing between two receiving antennas
w, and the experiment plate can obtain according to the measurement response of fluid-mixing under the water of different resistivity and the different oil-water ratios, and the horizontal ordinate of plate and ordinate are respectively amplitude difference Δ A, the phase differential ΔΦ of measurement, and the modulus of curve is set at resistivity of water R in the plate
wWith water holdup Y
w, applying unit Δ A-dB (decibel), ΔΦ-deg. (angle), R
w-Ω m (ohm meter), Y
w-% (percentage).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93107982A CN1051156C (en) | 1993-07-07 | 1993-07-07 | Wave-guide measuring method for water-holding rate of oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93107982A CN1051156C (en) | 1993-07-07 | 1993-07-07 | Wave-guide measuring method for water-holding rate of oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1097234A CN1097234A (en) | 1995-01-11 |
| CN1051156C true CN1051156C (en) | 2000-04-05 |
Family
ID=4986969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93107982A Expired - Fee Related CN1051156C (en) | 1993-07-07 | 1993-07-07 | Wave-guide measuring method for water-holding rate of oil well |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541725B (en) * | 2012-07-11 | 2016-04-27 | 中国石油化工股份有限公司 | The method of horizontal well holdup is asked with interfacial level |
| CN110700811B (en) * | 2019-10-29 | 2023-04-07 | 北京工商大学 | Waveguide phase measurement method and device for water content and flow of oil well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4360778A (en) * | 1978-10-30 | 1982-11-23 | Shell Oil Company | High frequency induction log for locating formation interfaces |
| EP0154535A2 (en) * | 1984-03-05 | 1985-09-11 | Texaco Development Corporation | Secondary field dielectric constant well logging system and method |
| US4818946A (en) * | 1987-09-24 | 1989-04-04 | Schlumberger Technology Corporation | Method and apparatus for enhancing the resolution of an induction logging tool in measuring a characteristic of a borehole formation |
| CN1051085A (en) * | 1989-10-04 | 1991-05-01 | 阿加尔有限公司 | Improvement to oil/water measurement |
| CN2122934U (en) * | 1992-06-03 | 1992-11-25 | 华北石油管理局测井公司 | High-frequency electromagnetic oscillating water-holding ratio instrument |
-
1993
- 1993-07-07 CN CN93107982A patent/CN1051156C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4360778A (en) * | 1978-10-30 | 1982-11-23 | Shell Oil Company | High frequency induction log for locating formation interfaces |
| EP0154535A2 (en) * | 1984-03-05 | 1985-09-11 | Texaco Development Corporation | Secondary field dielectric constant well logging system and method |
| US4818946A (en) * | 1987-09-24 | 1989-04-04 | Schlumberger Technology Corporation | Method and apparatus for enhancing the resolution of an induction logging tool in measuring a characteristic of a borehole formation |
| CN1051085A (en) * | 1989-10-04 | 1991-05-01 | 阿加尔有限公司 | Improvement to oil/water measurement |
| CN2122934U (en) * | 1992-06-03 | 1992-11-25 | 华北石油管理局测井公司 | High-frequency electromagnetic oscillating water-holding ratio instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1097234A (en) | 1995-01-11 |
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Address after: 102200 Changping Reservoir Road, Beijing Applicant after: Petroleum Univ. Address before: 434102 Jiangling County, Hubei Province Applicant before: Jianghan Petroleum Inst. |
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