CN102493801A - Whole-well multi-probe oil gas flow measuring device - Google Patents

Abstract

The invention provides a whole-well multi-probe oil-gas flow measuring device, wherein a first end of a centering sheet is fixed on an upper sliding ring, a second end of the centering sheet is fixed on a lower sliding ring, a first end of a central tube is fixedly connected with one end of the upper sliding ring, a second end of the central tube is fixedly connected with one end of the lower sliding ring, a first end of an upper supporting arm is fixed on the upper sliding ring, a first end of a lower supporting arm is fixed on a connected sliding sleeve, a second end of the upper supporting arm is movably connected with a second end of the lower supporting arm, a plurality of probes are respectively arranged on the lower supporting arms, the connected sliding sleeve is fixed on the lower sliding ring, a first end of a power rod is fixed on the lower sliding ring, and a second end of the power rod is. The number of the probes can be increased or decreased at will, so that the array multi-probes are uniformly distributed on the cross section, and the fluid oil gas measured by the array multi-probes can represent the overall characteristics of the fluid according to the statistical principle, thereby improving the measurement precision, and better realizing the oil gas flow measurement in the oil well production profile.

Description

A kind of full hole multiprobe gas stream measuring device

Technical field

The present invention relates to a kind of full hole multiprobe gas stream measuring device, belong to the oil reservoir logging field, be used for the flow measurement of oil well oil gas.

Background technology

Oil well liquid-producing oil gas flow measurement work is a core content of measuring production profile of oil well.At present, because domestic oil well productivity is lower, oil well is many to be the main mode of production with the oil pumper lifting, and measuring production profile of oil well is main logging mode to cross the survey of annular space afflux point.Improved rate of flow of fluid although cross the logging mode of annular space afflux point survey; Improved measuring condition; But it more is applicable to profit two phase conditions, and when gas phase existed, current collection mode made fluidised form become complicated; Most measuring methods are restricted, and the unstability of current collector also greatly reduces the well logging success rate simultaneously.During the full hole metering system, oil phase and gas phase all can keep good foam, and fluid flow state is single, are convenient to phase-splitting identification.Sonde method identification oil gas phase-splitting foam technology has had certain experimental application in the production profile of oil well well logging; Show that this method has good recognition capability to the oil gas foam; But owing to receive the restriction of apparatus structure and measuring-signal processing method; Be that each probe is walked single line, the signal on the probe reached in the equipment circuit tube that the quantity of this method probe is limited in below 12 usually.The probe of lesser amt has limited its distribution capability in the well cross section.The flow behavior of heterogeneous fluid makes the probe of lesser amt measure the overall permanence that fluid oil gas can not be represented fluid, causes measure error big, causes sonde method identification oil gas phase-splitting foam technology to fail to obtain production application always.

Summary of the invention

Full hole multiprobe gas stream measuring device provided by the invention adopts new probe excitation mode and measuring-signal treatment technology; Signal on the array multiprobe is reached in the circuit tube by two lines, and the probe number can arbitrarily increase and decrease, and the array multiprobe is evenly distributed on the cross section; According to Statistics; The array multiprobe measures the overall permanence that fluid oil gas can be represented fluid, improves certainty of measurement, thereby can realize the oil gas flow measurement in the production profile of oil well preferably.

The objective of the invention is to realize through following technical scheme:

A kind of full hole multiprobe gas stream measuring device comprises slip ring, central tube, body resistance-strengthening tablets, last support arm, following support arm, several probes, disjunctor sliding sleeve, following slip ring, power rail and drive unit, and first end of body resistance-strengthening tablets is fixed on the slip ring; Second end of body resistance-strengthening tablets is fixed on down on the slip ring; First end of central tube is fixedly connected with an end of last slip ring, and second end of central tube is fixedly connected with an end of following slip ring, and first end of last support arm is fixed on the slip ring; First end of following support arm is fixed on the disjunctor sliding sleeve; Second end of last support arm flexibly connects with second end of following support arm, and several probes are separately positioned on down on the support arm, and the disjunctor sliding sleeve is fixed on down on the slip ring; First end of power rail is fixed on down on the slip ring, and second end of power rail is connected with drive unit.

Description of drawings

The structural representation of the full hole multiprobe gas stream measuring device that Fig. 1 provides for the specific embodiment of the present invention;

The measurement sectional view that Fig. 2 provides for the specific embodiment of the present invention;

The circuit block diagram of the drive unit that Fig. 3 provides for the specific embodiment of the present invention;

The excitation probe that Fig. 4 provides for the specific embodiment of the present invention provides the circuit theory diagrams of the constant voltage power supply circuit of excitation power supply;

The probe excitation mode schematic diagram that Fig. 5 provides for the specific embodiment of the present invention;

The modulation signal sketch map that the adder output that Fig. 6 provides for the specific embodiment of the present invention obtains;

The detection that Fig. 7 provides for the specific embodiment of the present invention, filtering, separated straight element circuit schematic diagram;

Fig. 8 provide for the specific embodiment of the present invention through detection, filtering, signal schematic representation after straight;

The integrating circuit figure that Fig. 9 provides for the specific embodiment of the present invention;

Voltage-frequency conversion and power drive unit circuit diagram that Figure 10 provides for the specific embodiment of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is described further:

As shown in Figure 1; The measurement mechanism of the full hole multiprobe that this specific embodiment provides comprises slip ring 1, central tube 2, body resistance-strengthening tablets 3, last support arm 4, following support arm 5, several probes 6, disjunctor sliding sleeve 7, following slip ring 8, power rail 9 and drive unit 10; First end of body resistance-strengthening tablets 3 is fixed on the slip ring 1, and second end of body resistance-strengthening tablets 3 is fixed on down on the slip ring 8, and first end of central tube 2 is fixedly connected with an end of last slip ring 1; Second end of central tube 2 is fixedly connected with an end of following slip ring 8; First end of last support arm 4 is fixed on the slip ring 1, and first end of following support arm 5 is fixed on the disjunctor sliding sleeve 7, and second end of last support arm 4 flexibly connects with second end of following support arm 5; Several probes 6 are separately positioned on down on the support arm 5; Disjunctor sliding sleeve 7 is fixed on down on the slip ring 8, and first end of power rail 9 is fixed on down on the slip ring 8, and second end of power rail 9 is connected with drive unit 10.

Wherein, Drive unit comprises multiprobe driving source driver module and oil gas burble amount processing module; Multiprobe driving source driver module comprises signal generator, constant pressure source, multiprobe sensor and adder; Oil gas burble amount processing module comprises that detection filter is at a distance from straight element circuit, integration amplifying unit circuit, voltage-frequency conversion unit circuit and power drive unit circuit; The signal output part of signal generator is connected with the signal input part of constant pressure source; The signal output part of constant pressure source is connected the multiprobe sensor with the signal input part of multiprobe sensor signal output part is connected with the signal input part of adder; The signal output part of adder is connected with the signal input part of detection filter at a distance from straight element circuit, and detection filter is connected with the signal input part of integration amplifying unit circuit at a distance from the signal output part of straight element circuit, and the signal output part of integration amplifying unit circuit is connected with the signal input part of voltage-frequency conversion unit circuit; The signal output part of voltage-frequency conversion unit circuit is connected with the signal input part of power drive unit circuit, and the signal output part of power drive unit circuit is connected with cable.

The course of work of this specific embodiment is following: after measurement mechanism arrival down-hole target zone fathoms a little; Drive unit 10 is started working; Under the effect of drive unit 10, power rail 9 moves upward, and promoting down, slip ring 8 upwards slides with disjunctor sliding sleeve 7 together; Going up support arm 4 when body resistance-strengthening tablets 3 is propped up props up with following support arm 5; Following support arm 5 is 15 ° of angles with horizontal direction, arrives to subscribe the position, guarantees many spies point measurement pattern that probe radially is equally spaced on the flow section of well this moment.Superpose through the cross section; Full hole multiprobe gas stream measuring device just can be set up measurement sectional view as shown in Figure 2, and the cross section has 8 probe support arms, and each has 12 probes on the probe support arm down; Form the many spies point measurement that radially is equally spaced, the measurement sensitive volume is significantly increased.Thereby realize the flow measurement of full hole multiprobe oil gas.

The circuit block diagram of the drive unit of realization full hole multiprobe oil gas flow measurement is as shown in Figure 3, comprises multiprobe driving source driver module and multiprobe oil gas flow processing module two parts.Wherein multiprobe driving source driver module is made up of signal generator, constant pressure source and adder, provides the circuit theory diagrams of constant voltage power supply circuit of excitation power supply as shown in Figure 4 for excitation probe, and the probe excitation mode is as shown in Figure 5.It is that 10KHz, voltage peak-to-peak value are the sine wave signal of 5V that signal generator provides a frequency; The alternating voltage signal Vi of a constant amplitude of output behind constant pressure source; Be added in the input of anti-phase adder; Each applied signal voltage will convert electric current into through each self-loop input resistance, in the addition of " virtual earth " point, flow through feedback resistance and will convert output voltage into.Thereby output voltage be applied signal voltage with.That is:

${\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="HDA0000125793940000022.png,HDA0000125793940000032.png"\; state="\{\{state\}\}">V</figure-callout>}}_1=\frac{{R_1}^{\&prime;}{V}_i}{R_1+{R_1}^{\&prime;}},$ ${\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HDA0000125793940000023.png,HDA0000125793940000032.png"\; state="\{\{state\}\}">V</figure-callout>}}_2=\frac{{R_2}^{\&prime;}{V}_i}{R_2+{R_2}^{\&prime;}}...V_n=\frac{{R_n}^{\&prime;}{V}_i}{R_n+{R_n}^{\&prime;}}$

$V_o=-I_f{R}_f=-(I_1+I_2+I_3...+I_n)R_f$

$=-(\frac{{\mathrm{<figure-callout\; id="1"\; label="R\; f\; R"\; filenames="HDA0000125793940000022.png,HDA0000125793940000032.png"\; state="\{\{state\}\}">R</figure-callout>}}_f}{{R_{}}^{}}{\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="HDA0000125793940000022.png,HDA0000125793940000032.png"\; state="\{\{state\}\}">V</figure-callout>}}_1+\frac{{\mathrm{<figure-callout\; id="2"\; label="R\; f\; R"\; filenames="HDA0000125793940000023.png,HDA0000125793940000032.png"\; state="\{\{state\}\}">R</figure-callout>}}_f}{{R_{}}^{}}{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HDA0000125793940000023.png,HDA0000125793940000032.png"\; state="\{\{state\}\}">V</figure-callout>}}_2+\frac{{\mathrm{<figure-callout\; id="3"\; label="R\; f\; R"\; filenames="HDA0000125793940000023.png"\; state="\{\{state\}\}">R</figure-callout>}}_f}{{R_{}}^{}}{\mathrm{<figure-callout\; id="3"\; label="V"\; filenames="HDA0000125793940000023.png"\; state="\{\{state\}\}">V</figure-callout>}}_3...+\frac{R_f}{{R_n}^{\&prime;}}{V}_n)$

Get R ₁'=R ₂'=R ₃' ...=R _n'=R

Then $V_o=-\frac{R_f}{R}(V_1+{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="HDA0000125793940000023.png,HDA0000125793940000032.png"\; state="\{\{state\}\}">V</figure-callout>}}_2+{\mathrm{<figure-callout\; id="3"\; label="V"\; filenames="HDA0000125793940000023.png"\; state="\{\{state\}\}">V</figure-callout>}}_3...+V_n)---\left(1\right)$

Probe is connected between resistance R n and the Rn ', and when probe n touched oil vacuole or bubble, this road signal and earth potential switch were disconnected, then

When being water between probe n and the earth potential, this road signal and earth potential switch conduction, then V _n=0.Suppose to have only probe 1,2,3 all to touch oil vacuole or bubble; Remaining probe is all in water; Be to be water between probe and the earth potential; Then

multiprobe driving source driver module is as shown in Figure 6 at the final signal schematic representation that obtains of adder output; Be amplitude-modulated wave, on behalf of oil vacuole or bubble, the envelope signal projection of amplitude-modulated wave run into probe, and the switch that promptly constitutes between probe and the earth potential is disconnected.

Multiprobe oil gas flow processing module comprises filtering, detection, separated straight element circuit, and integration amplifies, the low-pass filter unit circuit, four part element circuits such as voltage-frequency conversion unit circuit and power drive unit circuit.Filtering, detection, as shown in Figure 7 at a distance from the schematic diagram of straight element circuit.The signal that obtains through adder output is an amplitude-modulated wave; Obtain flip-flop through filtering, detection, after straight element circuit and be zero clash into the signal of the alternating component that probe causes by the oil gas bubble; As shown in Figure 8; On behalf of probe, each projection of this signal all run into oil vacuole or bubble, and this signal becomes a direct current signal that becomes slowly after integration amplification, low-pass filter circuit unit.Because the diameter of oil gas bubble varies, the waveform protrusions 1 that shows at Fig. 9 is the variation that big oil gas bubble takes place when running into probe, and protruding 2 is variations that little oil gas bubble takes place when running into probe, so the number of number of elements oil gas bubble has very big error.Figure 10 is an integrating circuit, and the relation of output and input is:

this formula can be expressed as the output amplitude of per second under the input signal of every volt.Using integrating circuit here is the purpose that will reach the dash area addition of waveform shown in Figure 8; Be about to wave-shape amplitude and convert the waveform energy into; So just can obtain oil gas exactly and steep ratio shared on the cross section, can obtain oil gas burble amount accurately thus.Signal through integrating circuit becomes slow a direct current signal after filtering; This signal is again through voltage-frequency conversion, power drive, directly reach ground through cable; Voltage-frequency conversion and power driving circuit schematic diagram are as shown in Figure 9, so far accomplish the measurement of full hole multiprobe oil gas flow.

The above; Be merely the preferable specific embodiment of the present invention; These specific embodiment all are based on the different implementations under the general idea of the present invention, and protection scope of the present invention is not limited thereto, and any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims (2)

1. a full hole multiprobe gas stream measuring device comprises slip ring, central tube, body resistance-strengthening tablets, last support arm, following support arm, several probes, disjunctor sliding sleeve, following slip ring, power rail and drive unit, it is characterized in that; First end of body resistance-strengthening tablets is fixed on the slip ring, and second end of body resistance-strengthening tablets is fixed on down on the slip ring, and first end of central tube is fixedly connected with an end of last slip ring; Second end of central tube is fixedly connected with an end of following slip ring; First end of last support arm is fixed on the slip ring, and first end of following support arm is fixed on the disjunctor sliding sleeve, and second end of last support arm flexibly connects with second end of following support arm; Several probes are separately positioned on down on the support arm; The disjunctor sliding sleeve is fixed on down on the slip ring, and first end of power rail is fixed on down on the slip ring, and second end of power rail is connected with drive unit.

2. full hole multiprobe gas stream measuring device according to claim 1; It is characterized in that; Said drive unit comprises multiprobe driving source driver module and oil gas burble amount processing module; Said multiprobe driving source driver module comprises signal generator, constant pressure source, multiprobe sensor and adder; Said oil gas burble amount processing module comprises that detection filter is at a distance from straight element circuit, integration amplifying unit circuit, voltage-frequency conversion unit circuit and power drive unit circuit; The signal output part of signal generator is connected with the signal input part of constant pressure source; The signal output part of constant pressure source is connected the multiprobe sensor with the signal input part of multiprobe sensor signal output part is connected with the signal input part of adder; The signal output part of adder is connected with the signal input part of detection filter at a distance from straight element circuit, and detection filter is connected with the signal input part of integration amplifying unit circuit at a distance from the signal output part of straight element circuit, and the signal output part of integration amplifying unit circuit is connected with the signal input part of voltage-frequency conversion unit circuit; The signal output part of voltage-frequency conversion unit circuit is connected with the signal input part of power drive unit circuit, and the signal output part of power drive unit circuit is connected with cable.

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