CN214427236U - Oil-gas-water three-phase saturation testing device of high-temperature and high-pressure flat plate model - Google Patents
Oil-gas-water three-phase saturation testing device of high-temperature and high-pressure flat plate model Download PDFInfo
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Abstract
The utility model relates to a high temperature high pressure plate model oil gas water triphase saturation testing arrangement, container 14, crude oil intermediate container 15, dry gas intermediate container 16, plate model system 21, data acquisition system 22, back pressure valve 23, oil and gas separator 24, gas meter 25 and oil gas chromatograph 26 in the middle of displacement pump 1, confined pressure pump 2, back pressure pump 3, formation water. The flat model system comprises a flat model 27, a high-temperature high-pressure kettle body 31, a kettle body frame 32, a heating temperature control system 34, a Y-axis direction stepping motor 35, an X-axis direction stepping motor 36 and an acoustoelectric detector 41, wherein the flat model is embedded in the high-temperature high-pressure kettle body, an inlet of the kettle body is connected with an injection port of the flat model, an outlet of the kettle body is connected with a mining port of the flat model through pipelines, and the flat model is provided with the heating temperature control system 34 for temperature detection and control. The utility model discloses easy and simple to handle, it is directly perceived to measure, for the test of the three-phase saturation of oil gas reservoir failure or displacement development process oil gas water, provides instrument and means.
Description
Technical Field
The utility model relates to an oil and gas exploration and development field especially relates to a high temperature high pressure flat plate model acoustoelectric scanning oil gas water triphase saturation testing arrangement.
Background
Well pattern, well type, interlayer interference, gravity drive and development technical policies in the development process of the oil and gas reservoir are important factors influencing the development effect of the oil and gas reservoir, conventional cores (such as small plunger cores, full-diameter cores and long cores) and low-pressure physical models (such as glass etching models) cannot meet the simulation requirement of the real oil and gas reservoir, and particularly the oil and gas reservoir adopting a gas injection development mode can realize the displacement effect under high pressure. Although the X-CT and NMR online saturation testing technology is developed in recent years, most of test objects are standard cores, and the test cannot be carried out on large-scale cores.
At present, the large-scale three-dimensional physical model saturation testing device mainly has the following characteristics: firstly, most of large-scale three-dimensional physical models are low-pressure physical models, the pressure bearing of the models is generally not more than 25MPa, the larger the size of the models is, the lower the pressure bearing (Peng Cai Zhen, Menglixin, Guo Ping, and the like). The three-dimensional physical model displacement experiment simulation device develops and applies [ J ] petroleum experiment geology, 2013,35(5):570 and 573), particularly, the experiment conditions of a cementing model or an organic glass etching model formed by high-temperature sintering are only normal temperature and normal pressure, and the used crude oil is simulation oil, so that a real stratum fluid sample (Wuyun, thin interbed interference three-dimensional physical simulation experiment research [ J ] cannot be adopted, laboratory research and exploration, 2017,36(1): 25-29). Secondly, in a general large-scale three-dimensional physical model saturation test experiment, a saturation detector is generally buried in a physical model in a probe form, or electrodes are attached to two sides of a rock plate in an array form for point-to-point test, because the saturation probe has a certain size, the number of probes is too much, the influence on fluid seepage is caused, and because the volume of the detector adopted by the electrodes is limited, the detectors cannot be arranged too much, so that the test precision is limited (positive construction is flat, a device and a method for testing the injection dry gas longitudinal wave and efficiency of a high-temperature high-pressure condensate gas reservoir: China, 104563982[ P ]. 2017.02.01); thirdly, because most of the existing large-scale physical model saturation testing principles are direct current electric logging, a probe or an electrode must be in direct contact with a rock plate to acquire signals, so that the sealing degree of the rock plate is reduced, and a large number of signal leads are generated point to point, and the leads must be led out from an external model under the conditions of high temperature and high pressure, so that the leakage risk is greatly increased (Yangsheng. gas reservoir water invasion physical simulation experiment device: China, 206038586[ P ]. 2017.03.22). Fourthly, the existing large-scale physical model can only carry out resistivity test generally and does not have the function of simultaneously testing sound wave and resistivity, can only simulate the water flooding or polymer flooding process, and cannot simulate the gas injection development process (such as gas flooding and gas flooding) of an oil and gas reservoir (Guo, heterogeneous bottom water oil and gas reservoir three-dimensional physical simulation experimental device and a saturation determination method: China, 104675394[ P ] 2018.01.12).
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high temperature high pressure plate model oil gas water three-phase saturation testing arrangement, the device principle is reliable, easy and simple to handle, and the measuring result is directly perceived, is applicable to the three-dimensional physical model acoustoelectric scanning oil gas water three-phase saturation test of high temperature high pressure, for oil and gas water three-phase saturation test in oil and gas reservoir failure or displacement development process, displacement leading edge monitoring, different injection and production well pattern deployment, reservoir heterogeneity, gravity drive and various well type displacement mechanism research, provides instrument and means.
In order to achieve the technical purpose, the utility model adopts the following technical scheme.
A device for testing the three-phase saturation of oil, gas and water of a high-temperature and high-pressure flat model mainly comprises a displacement pump, a confining pressure pump, a back pressure pump, a formation water intermediate container, a crude oil intermediate container, a dry gas intermediate container, a high-temperature and high-pressure flat model system, an acoustoelectric test positioning control and data acquisition system, a back pressure valve, an oil-gas separator, a gas meter and an oil-gas chromatograph.
The high-temperature high-pressure flat model system mainly comprises a flat model, a high-temperature high-pressure kettle body, a kettle body frame, a fastening system, a heating temperature control system, a Y-axis direction stepping motor, an X-axis direction stepping motor, a Y-axis direction sliding rail, an X-axis direction sliding rail, a Y-axis direction sliding block, an X-axis direction sliding block, an acoustoelectric detector and a kettle body cover plate. The flat plate model is fixed on the inner side end face of the kettle cover plate and embedded in the high-temperature high-pressure kettle body, the kettle cover plate is provided with a line passing device, a kettle body inlet, a confining pressure liquid injection inlet and a kettle body outlet, and the kettle cover plate and the high-temperature high-pressure kettle body are fastened through a fastening system and integrally hung on the kettle body frame. The front side and the back side of the flat plate model are respectively provided with a Y-axis direction stepping motor, an X-axis direction stepping motor, a Y-axis direction sliding rail, an X-axis direction sliding rail, a Y-axis direction sliding block and an X-axis direction sliding block, the Y-axis direction stepping motor is fixed at one end of the X-axis direction sliding block and combined with the Y-axis direction sliding rail into a whole and integrally installed on the X-axis direction sliding rail, the acoustoelectric detector is fixed on the Y-axis direction sliding block and driven by the Y-axis direction stepping motor to linearly slide along the Y-axis direction sliding rail for acoustoelectric scanning test, the X-axis direction stepping motor drives the X-axis direction sliding block to linearly slide along the X-axis direction sliding rail, the acoustoelectric detector moves along the X/Y direction in the whole test process and moves in a zigzag manner, and accordingly the acoustoelectric scanning test of the acoustoelectric detector on the whole flat plate model is completed. The flat model fastens through fastening bolt, there is the filling opening on the left of the model, there is the extraction outlet on the right side, cauldron body entry links to each other through the pipeline with the flat model filling opening, cauldron body export is adopted the export with the flat model and is passed through the pipeline and link to each other, hydraulic oil gets into the annular space of the high temperature autoclave body with the flat model through confining pressure liquid injection opening, the positive and negative two sides of flat model all are equipped with heating temperature control system and visit the temperature and control the temperature, realize the heating of the internal portion oil bath of high temperature autoclave, internal all electric wires of cauldron, the signal line is drawn forth by the line passing device.
The displacement pump is connected to the high-temperature high-pressure kettle body inlet through a formation water intermediate container, a crude oil intermediate container and a dry gas intermediate container respectively, the confining pressure pump is connected to the confining pressure liquid injection inlet, the internal electric wire and the signal wire are connected to the sound and electricity test positioning control and data acquisition system through the wire passing device, the kettle body outlet is sequentially connected with the oil-gas separator, the gas meter and the oil-gas chromatograph through the back pressure valve, and the top of the back pressure valve is connected to the back pressure pump.
The heating temperature control system, the pressure sensor, the acoustoelectric detector and the stepping motor system are all connected with the acoustoelectric test positioning control and data acquisition system, so that the acquisition of temperature data, pressure data, ultrasonic data and resistivity data and the control of the displacement of the stepping motor are realized.
The flat plate model mainly comprises a model cover plate, a sand filling model and a flat plate pressure-bearing cavity, wherein a layer of rubber sleeve covers the model cover plate and the sand filling model and is fastened through a fastening bolt, and the purpose of complete sealing is achieved.
The acoustoelectric detector mainly comprises an acoustoelectric transmitting probe and an acoustoelectric receiving probe, wherein 1 ultrasonic transmitting wafer and 1 induction transmitting coil are arranged in the acoustoelectric transmitting probe, and 1 ultrasonic receiving wafer and 1 induction receiving coil are arranged in the acoustoelectric receiving probe. According to the ultrasonic wave principle, when an acoustic-electric transmitting probe generates ultrasonic waves (longitudinal waves), the ultrasonic waves pass through a flat plate model to reach an acoustic-electric receiving probe, an oscilloscope obtains a first wave position, the acoustic wave time difference at the current position of an acoustic-electric detector can be obtained after data processing, according to the induction logging principle, when an induction transmitting coil in the acoustic-electric transmitting probe is electrified with alternating current, an alternating magnetic field is formed around the coil, induction current (eddy current) is generated in a rock plate, the secondary induction current is generated in the induction receiving coil by the secondary magnetic field caused by the eddy current, the resistivity at the current position of the acoustic-electric detector can be obtained after data processing, and an acoustic wave signal line and a resistance signal line are separated from each other and do not interfere with each other.
The high-temperature high-pressure kettle body realizes 0-180 degrees of rotation through the kettle body rotating mechanism, the kettle body rotating mechanism mainly comprises a motor, a double-stage speed reducer and a rotating shaft, the motor is rotated positively and negatively through adjusting a frequency converter, the purpose of adjusting the inclination angle of the kettle body is achieved, and oil and gas reservoir gravity drive at different inclination angles is simulated.
The key parts used in the utility model are explained as follows:
(1) flat plate model: the pressure-bearing cavity of the flat plate for the experiment has the displacement pressure of 70MPa at the maximum, the confining pressure of 80MPa at the maximum, the maximum working temperature of 150 ℃, the area of a working chamber: 1000mm long, 300mm wide and 10mm deep. The material is high carbon steel, and the inner and outer surfaces are all subjected to rust prevention treatment. Comprises a model bottom plate, a model cover plate, an upper rubber sleeve, a fastening bolt and the like.
(2) A high-temperature high-pressure kettle body: this sealed model is cylindric cauldron body, flange diameter 900mm, long 1750mm, high 2.3m, adopts sealed, the flange joint mode of column doublestage, and the cauldron body passes through the two-stage speed reducer and is driven by the motor rotatory, can stop in the optional position.
(3) The kettle body frame: the wheel is formed by welding rectangular steel pipes, has the length of 2000mm, the width of 1500mm and the height of 1600mm, is provided with two 6 'directional wheels and two 6' universal wheels with brakes, and is convenient to move and install.
(4) Kettle body rotary mechanism: mainly comprises a frequency converter, a motor, a double-stage speed reducer, a rotating shaft and the like. The motor is rotated forwards and backwards by adjusting the frequency converter, so that the aim of adjusting the inclination angle of the equipment is fulfilled.
(5) A fastening system: the kettle consists of outer hexagonal fastening bolts with the mechanical strength of above 8.8 grade M64, and is used for mounting and fastening the kettle body and the flange.
(6) Heating the temperature control system: heating pipes are arranged on the bottom plate and the cover plate of the flat model, the power of the heating pipes is 3.5 KwX 4, AC 380V is used for supplying power, and temperature detection and control are carried out through a temperature control system.
(7) Confining pressure system: and hydraulic oil is injected into the kettle body through an electric turbine booster pump to pressurize, the pressure range is 0-90 MPa, and the precision is 0.1 MPa.
(8) A stepping motor system: the stepping motor can realize the speed regulation of 0.01-1000mm/min, the stepping error is less than +/-0.1 percent, the highest working temperature is 150 ℃, the motor has no sealing environment, can bear high pressure and oil resistance, and realizes the mechanical zero return.
(9) An acoustoelectric detector: the acoustoelectric detector comprises an acoustoelectric transmitting probe and an acoustoelectric receiving probe, wherein 1 ultrasonic transmitting wafer and 1 induction transmitting coil are arranged in the acoustoelectric transmitting probe, 1 ultrasonic receiving wafer and 1 induction receiving coil are arranged in the acoustoelectric receiving probe, an ultrasonic signal line and a resistance signal line are separated from each other, the insulating property is good, the ultrasonic testing and the resistivity testing can be synchronously carried out, and the acoustoelectric detector has no sealing environment, and is high temperature resistant, high pressure resistant, oil resistant and the highest working temperature of 150 ℃.
(10) A pressure sensor: pressure sensors are arranged on the injection opening, the extraction opening, the confining pressure liquid injection opening and the top of the back pressure valve of the flat-plate model, and the working range is 0-100 MPa.
(11) Acoustoelectric test positioning control and data acquisition system: the method mainly comprises the steps of collecting temperature data, pressure data, ultrasonic data and resistivity data.
The utility model discloses the principle is reliable, and is easy and simple to handle, the suitability is strong, combine acoustoelectric detector and step motor system to carry out the slip scan test to dull and stereotyped model, the required quantity of greatly reduced acoustoelectric detector, and acoustoelectric detector and dull and stereotyped model all embed in the internal portion of high temperature autoclave, sealed problem under the high temperature high pressure condition has been solved, for the test of oil gas water three-phase saturation among the oil and gas reservoir failure or the displacement development process, the monitoring of displacement leading edge, different notes adopt well net deployment, reservoir heterogeneity, gravity drives and various well type displacement mechanism researches provide a new high resolution ratio high temperature high pressure large scale three-dimensional physical model and oil gas water three-phase saturation on-line test method, wide application prospect has.
Drawings
FIG. 1 is a schematic structural diagram of a device for testing the three-phase saturation of oil, gas and water in a high-temperature and high-pressure flat model.
Fig. 2, 3 and 4 are a front view, a top view and a left view of the high-temperature and high-pressure flat plate model system, respectively.
In the figure: 1-a displacement pump, 2-a confining pressure pump, 3-a back pressure pump, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13-a valve, 14-a formation water intermediate container, 15-a crude oil intermediate container, 16-a dry gas intermediate container, 17, 18, 19, 20-a pressure sensor, 21-a high-temperature high-pressure flat model system, 22-an acoustoelectric test positioning control and data acquisition system, 23-a back pressure valve, 24-an oil-gas separator, 25-a gas meter, 26-an oil gas chromatograph, 27-a flat model, 28-a flat model injection port, 29-a flat model extraction port, 30-a fastening bolt, 31-a high-temperature autoclave body, 32-an autoclave body frame, 33-a fastening bolt, 34-a heating temperature control system, 35-a Y-axis direction stepping motor, 36-an X-axis direction stepping motor, 37-a Y-axis direction slide rail, 38-an X-axis direction slide block, 39-Y-axis direction slide block, 40-X-axis direction slide block, 41-acoustoelectric detector, 42-kettle cover plate, 43-line passing device, 44-kettle inlet, 45-confining pressure liquid injection inlet, 46-kettle outlet, 47-flat model cover plate, 48-sand filling model, 49-flat pressure-bearing cavity, 50-acoustoelectric emission probe, 51-acoustoelectric receiving probe and 52-kettle rotating mechanism.
Detailed Description
The present invention is further described below with reference to the accompanying drawings so that those skilled in the art can understand the present invention. It is to be understood that the invention is not limited in scope to the specific embodiments, but is intended to cover modifications within the spirit and scope of the invention as defined and defined by the appended claims, as will occur to those skilled in the art.
See fig. 1, 2, 3, 4.
A high-temperature high-pressure flat model oil-gas-water three-phase saturation testing device comprises a displacement pump 1, a confining pressure pump 2, a back pressure pump 3, a formation water intermediate container 14, a crude oil intermediate container 15, a dry gas intermediate container 16, a high-temperature high-pressure flat model system 21, an acoustoelectric test positioning control and data acquisition system 22, a back pressure valve 23, an oil-gas separator 24, a gas meter 25 and an oil-gas chromatograph 26.
The high-temperature high-pressure flat model system 21 comprises a flat model 27, a high-temperature high-pressure kettle body 31, a kettle body frame 32, a heating temperature control system 34, a Y-axis direction stepping motor 35, an X-axis direction stepping motor 36, a Y-axis direction sliding rail 37, an X-axis direction sliding rail 38, a Y-axis direction sliding block 39, an X-axis direction sliding block 40, an acoustoelectric detector 41 and a kettle body cover plate 42, wherein the high-temperature high-pressure kettle body 31 is arranged on the kettle body frame 32, kettle body cover plates 42 are arranged on two sides of the high-temperature high-pressure kettle body (the high-temperature high-pressure kettle body and the kettle body cover plates 42 are fastened through fastening bolts 33), and a kettle body inlet 44, a confining pressure liquid injection inlet 45 and a kettle body outlet 46 are arranged on the kettle body cover plates 42; the flat model 27 is embedded in the high-temperature high-pressure kettle body and is fixed on the inner side of the kettle cover plate, an injection port 28 is arranged on the left side of the flat model, a production port 29 is arranged on the right side of the flat model, a kettle body inlet 44 is connected with the flat model injection port 28 through a pipeline, a kettle body outlet 46 is connected with the flat model production port 29 through a pipeline, a confining pressure liquid injection port 45 is communicated with the annular space of the high-temperature high-pressure kettle body and the flat model, hydraulic oil enters the annular space through the confining pressure liquid injection port, the flat model is provided with a heating temperature control system 34 for temperature detection and control, and oil bath heating in the high-temperature high-pressure kettle body is realized.
The flat plate model comprises a model cover plate 47, a sand filling model 48 and a flat plate pressure-bearing cavity 49; the front side and the back side of the flat plate model are respectively provided with a Y-axis direction stepping motor 35, an X-axis direction stepping motor 36, a Y-axis direction sliding rail 37, an X-axis direction sliding rail 38, a Y-axis direction sliding block 39 and an X-axis direction sliding block 40, the Y-axis direction stepping motor is fixed at one end of the X-axis direction sliding block and combined with the Y-axis direction sliding rail into a whole and integrally installed on the X-axis direction sliding rail, the acoustoelectric detector 41 is fixed on the Y-axis direction sliding block and driven by the Y-axis direction stepping motor to linearly slide along the Y-axis direction sliding rail for acoustoelectric scanning testing, and the X-axis direction stepping motor drives the X-axis direction sliding block to linearly slide along the X-axis direction sliding rail.
The displacement pump 1 is connected with a high-temperature high-pressure kettle body inlet 44 through a formation water intermediate container 14, a crude oil intermediate container 15 and a dry gas intermediate container 16 respectively, a confining pressure pump 2 is connected with a confining pressure liquid injection inlet 45, a kettle body outlet 46 is sequentially connected with an oil-gas separator 24, a gas meter 25 and an oil-gas chromatograph 26 through a back-pressure valve 23, the top of the back-pressure valve 23 is connected with a back-pressure pump 3, the kettle body inlet, the confining pressure liquid injection inlet, the kettle body outlet and the back-pressure valve are respectively provided with a pressure sensor (17, 18, 19 and 20), and the heating temperature control system, the pressure sensor, the acoustoelectric detector, the Y-axis direction stepping motor and the X-axis direction stepping motor are all connected with the acoustoelectric test positioning control and data acquisition system 22, so that the acquisition of temperature, pressure, ultrasonic waves and resistivity data and the control of the displacement of the stepping motor are realized.
The flat plate model comprises a model cover plate 47, a sand filling model 48 and a flat plate pressure-bearing cavity 49, wherein a rubber sleeve is arranged between the model cover plate and the sand filling model and is fastened through a fastening bolt 30 to achieve complete sealing, and the sand filling model is positioned in the flat plate pressure-bearing cavity.
The kettle cover plate is provided with a wire passing device 43, and all electric wires and signal wires in the kettle are connected with an acoustoelectric test positioning control and data acquisition system through the wire passing device 43.
The acousto-electric detector comprises an acousto-electric transmitting probe 50 and an acousto-electric receiving probe 51.
And the acoustoelectric detector moves along the X/Y direction in the test process and moves in a zigzag shape, so that the acoustoelectric scanning test of the acoustoelectric detector on the whole flat model is completed.
The high-temperature high-pressure kettle body rotates by 0-180 degrees through the kettle body rotating mechanism 52.
The method for testing the three-phase saturation of the oil, gas and water of the high-temperature and high-pressure flat plate model by using the device comprises the following specific processes:
(1) machining flat plate model
And processing the flat plate model 27, wherein the flat plate model comprises a flat plate model cover plate 47 and a flat plate pressure-bearing cavity 49, punching the end face of the flat plate pressure-bearing cavity 49 in a user-defined mode according to the actual well position, and drilling a flat plate model injection port 28 and a flat plate model extraction port 29. Well arrangement pipelines are designed according to different well types and well tracks, such as a vertical well, an inclined well, a horizontal well and the like, and penetrate through the perforations to be buried in the grooves of the flat plate pressure-bearing cavity 49. According to the position of the interlayer in the actual reservoir (the interlayer refers to a low-permeability or impermeable rock stratum which is continuously or discontinuously present in the reservoir section in the transverse direction), mud rock can be filled in the corresponding position of the groove of the flat plate pressure-bearing cavity 49 or an impermeable rubber strip can be placed to serve as the interlayer.
(2) Making sand-filled model and completing model assembly
The sand filling scheme is determined according to core data provided in an oil field, cement, quartz sand and water are mixed according to a certain proportion, the mixture is fully stirred to be uniformly mixed, a small plunger core is drilled after a sample is dried to test physical parameters such as permeability, porosity and the like, and if the sample meets the experimental requirements, the formula is selected to manufacture a sand filling model 48. And pouring the prepared sand filling sample into the groove of the flat plate pressure-bearing cavity 49 to ensure that the sand filling sample is uniformly filled, cementing under the condition of external force, and curing after drying. The surface of the sand-filled model 48 is covered with a rubber sleeve, and a flat model cover plate 47 is covered and fixed and sealed through a fastening bolt 30. Fixing the manufactured flat plate model 27 on the inner side end face of the kettle cover plate 42, installing a Y-axis direction stepping motor 35, an X-axis direction stepping motor 36, a Y-axis direction slide rail 37, an X-axis direction slide rail 38, a Y-axis direction slide block 39 and an X-axis direction slide block 40 on the front face and the back face of the flat plate model 27, fixing an acoustoelectric detector 41 on the Y-axis direction slide block 39, and installing a heating temperature control system 34 on the front face and the back face of the flat plate model 27 for temperature detection and control. The injection port 28 of the flat model is connected with the inlet 44 of the kettle body by a pipeline, the sampling port 29 of the flat model is connected with the outlet 46 of the kettle body by a pipeline, and an ultrasonic signal line, a resistance signal line, a control line of a stepping motor and a heating electric wire are all led out from the wire passing device 43. The flat plate model 27 is hoisted to the position flush with the autoclave body 31 by adopting hoisting equipment and then is slowly pushed in, and the autoclave body 31 and the autoclave body cover plate 42 are fastened by the fastening system 33. Connect all experimental apparatus according to fig. 1, and close all valves, displacement pump 1 is respectively through container 14 in the middle of the formation water, container 15 in the middle of the crude oil, container 16 connects in autoclave body entry 44 in the middle of the dry gas, confining pressure pump 2 connects in confining pressure liquid inlet 45, the internal cable connection of cauldron that is drawn forth by wire passing device 43 is in acoustoelectric test positioning control and data acquisition system 22, cauldron body export 46 connects gradually oil and gas separator 24, gas meter 25, oil gas chromatograph 26 through back pressure valve 23, back pressure valve 23 top is connected in back pressure pump 3.
(3) Oil-gas-water three-phase saturation calibration treatment on representative rock sample
Because the high-temperature high-pressure large-scale three-dimensional physical model system 21 has larger assembling workload each time, in order to ensure the success rate of the experiment, the oil-gas-water three-phase saturation calibration work is carried out in the small core holder by adopting the representative small plunger core drilled in the step 2. First, the water saturation S is carried outwWith measured rock resistivity RtCalibrating the relation, fully saturating the rock core with formation water, and measuring the resistivity R of the rock core at the momentoThen, a separator oil sample is injected into the core by taking 0.1PV (PV, core pore volume) as a gradient, and different water saturation degrees S are measuredwLower rockResistivity RtS is performed in a log-log coordinate systemwTo correspond to
Regression of experimental data to determine the Archie's formula for flat sand-packed models
Parameters b and n, or derived from empirical coefficients (e.g. sandstone, typically b is 1, and n is 2). Second, the gas saturation S is carried outgCalibrating the relation between the time difference delta T and the sound wave, fully saturating the formation water of the rock core, displacing the rock core to a water-binding state by using dry gas, and continuously pressurizing by using the dry gas to increase the pressure of the rock core to the original formation pressure P1Then injecting the separator oil sample into the core by taking 0.1PV as gradient to measure different gas saturation degrees SgAnd (4) performing S in a rectangular coordinate system on the sound wave time difference delta T of the lower coregRegression fitting with corresponding acoustic wave time difference delta T experimental data to obtain gas saturation SgThe relation formula of the acoustic time difference with the core is as follows: sgA · Δ T + b. Thirdly, obtaining the water saturation S by the calibration methodwGas saturation SgThen, the oil saturation S is calculatedo＝1-Sw-Sg。
(4) Formulating formation fluid samples
Obtaining a separator gas sample and a separator oil sample under the field production condition of an oil field, and obtaining the temperature T and the pressure P of the original stratum according to GB/T26981-1And preparing a crude oil sample, ensuring that the gas-oil ratio and the bubble point pressure are close to the PVT report of the formation crude oil, and then preparing a formation water sample according to a formation water analysis report provided by an oil field on site. The prepared crude oil sample is loaded into a crude oil intermediate container 15, the formation water sample is loaded into a formation water intermediate container 14, and the separator gas sample is loaded into a dry gas intermediate container 16.
(5) Saturating the formation fluid and restoring the original formation conditions with the flat-plate model
The confining pressure liquid injection port 45 is arranged at a vertical upward position through the kettle body rotating mechanism 52, the valve 11 is opened, and the confining pressure pump 2 is used for injecting the hydraulic oil in a constant speed modeAnd (4) entering the high-temperature high-pressure kettle body 31, stopping injecting liquid after hydraulic oil overflows from the kettle body emptying valve, and closing the emptying valve. The high-temperature high-pressure kettle body 31 is adjusted to the angle required by the experiment through the kettle body rotating mechanism 52, the valve 13 is opened, and the back pressure of the back pressure valve 23 is increased to the original formation pressure P in a constant pressure mode through the back pressure pump 31 Opening valves 4, 7, 10 and 12, injecting the formation water sample of the formation water intermediate container 14 into the flat plate model 27 in a constant speed mode through the displacement pump 1 to completely saturate the flat plate model 27, and continuously pressurizing the flat plate model 27 with the formation water in a constant pressure mode through the displacement pump 1 after the completion to increase the pore pressure of the flat plate model 27 to the original formation pressure P1And in the pressure building process, the confining pressure of the high-temperature high-pressure kettle body 31 is controlled to be always higher than the pore pressure 5MPa of the flat plate model 27 through the confining pressure pump 2, the valves 4 and 7 are closed, and the temperature in the high-temperature high-pressure kettle body 31 is increased to the original formation temperature T through the heating temperature control system 34 and is kept stable. And opening the valves 5 and 8, injecting the crude oil sample in the crude oil intermediate container 15 into the flat plate model 27 through the displacement pump 1 in a constant speed mode to replace the formation water, and closing the valves 5, 8 and 10 when the formation water in the oil-gas separator 24 is not increased any more, so that the original formation condition of the flat plate model 27 is established.
(6) Simulating the oil reservoir exhaustion or displacement process, and performing ultrasonic and resistivity linear scanning test on the flat model
The step motor speed and the single step distance are set through the acoustoelectric test positioning control and data acquisition system 22, the motor speed directly influences the scanning speed of the acoustoelectric detector 41, the single step distance can be determined according to the required test precision, the smaller the single step distance is, the denser the sampling points of the acoustoelectric detector are, the more accurate the saturation test result is, but the experiment time and the cost are increased to some extent. If only a single acoustoelectric detector is assembled on the Y-axis direction sliding block 39, the acoustoelectric test positioning control system 22 controls the Y-axis direction stepping motor 35 to drive the acoustoelectric detector to linearly move along the Y-axis direction sliding rail 37, the X-axis direction stepping motor 36 drives the acoustoelectric detector to linearly move along the X-axis direction sliding rail 38, the acoustoelectric detector performs zigzag sliding scanning along the X/Y direction in the test process until the acoustoelectric scanning task of the whole flat model is completed, and the acoustic time difference and the resistivity at the position of the acoustoelectric detector can be simultaneously tested in the process; if the slide block 39 in the Y-axis direction is provided with a row of acoustoelectric detectors, the acoustoelectric test positioning control system 22 controls the stepping motor 36 in the X-axis direction to drive the row of acoustoelectric detectors to linearly move along the slide rail 38 in the X-axis direction, and the acoustoelectric detectors only linearly slide along the X-axis direction in the test process until the acoustoelectric scanning task of the whole flat plate model is completed.
If the three-phase saturation of oil, gas and water in the reservoir failure development process needs to be tested, the back pressure pump 3 is used for failing the pore pressure of the flat plate model 27 to the bubble point pressure P in a constant pressure mode2Continuing to reduce the pressure after the pore pressure is stable until the pore pressure of the flat plate model is reduced to the waste pressure P3The acoustic wave time difference and the resistivity of the flat plate model 27 are tested by the acoustoelectric detector 41 under all levels of pressure according to the above description, information is fed back to the data acquisition system 22, meanwhile, separator gas in the gas meter 25 and separator oil in the oil-gas separator 24 under all levels of pressure in the exhaustion process are collected, and oil-gas chromatographic analysis is carried out through the oil-gas reservoir chromatogram 26.
If the three-phase saturation of oil, gas and water in the oil deposit gas injection development process needs to be tested, the valves 6, 9 and 10 are opened, the separator gas sample of the dry gas intermediate container 16 is injected into the flat plate model 27 in a constant speed mode through the displacement pump 1 by taking 0.1PV as gradient until 2.0PV (20 times in total), after the pore pressure is stable, sound wave time difference and resistivity tests are carried out on the flat plate model 27 through the sound-electricity detector 41 according to the introduction after the 0.1PV separator gas is injected, information is fed back to the data acquisition system 22, meanwhile, the separator gas in the gas meter 25 and the separator oil in the oil-gas separator 24 under the pressure of each stage in the failure process are collected, and oil-gas chromatographic analysis is carried out through the oil-gas reservoir chromatograph 26.
(7) Data processing and quantitative determination of three-phase saturation distribution of oil, gas and water in flat plate model
According to the water saturation S established in the step (3)wWith measured rock resistivity RtCalibration formula
Gas saturation SgTime difference delta T calibration formula S with sound wavega.DELTA.T + b, oil saturation calibration formula So＝1-Sw-SgThe acoustic time difference and the resistivity data acquired by the data acquisition system 22 are substituted into the formula, so that the oil-gas-water three-phase saturation distribution of the flat plate model 27 at each position under the corresponding condition can be quantitatively determined.
Claims (6)
1. The utility model provides a high temperature high pressure flat model oil gas water triphase saturation testing arrangement, includes displacement pump (1), confined pressure pump (2), back pressure pump (3), formation water intermediate container (14), crude oil intermediate container (15), dry gas intermediate container (16), high temperature high pressure flat model system (21), acoustoelectric test positioning control and data acquisition system (22), back pressure valve (23), oil and gas separator (24), gas meter (25) and oil gas chromatograph (26), a serial communication port, high temperature high pressure flat model system (21) includes flat model (27), autoclave body (31), cauldron body frame (32), heating temperature control system (34), Y axle direction step motor (35), X axle direction step motor (36), Y axle direction slide rail (37), X axle direction slide rail (38), Y axle direction slider (39), The device comprises an X-axis direction sliding block (40), an acoustoelectric detector (41) and a kettle cover plate (42), wherein a high-temperature and high-pressure kettle body (31) is arranged on a kettle body rack (32), the kettle cover plate (42) is arranged on two sides of the high-temperature and high-pressure kettle body, and a kettle body inlet (44), a confining pressure liquid injection inlet (45) and a kettle body outlet (46) are formed in the kettle body cover plate; the plate model (27) is embedded in the high-temperature high-pressure kettle body and fixed on the inner side of the kettle cover plate, an injection port (28) is arranged on the left side of the plate model, a production port (29) is arranged on the right side of the plate model, an inlet of the kettle body is connected with the injection port of the plate model, an outlet of the kettle body is connected with the production port of the plate model through pipelines, a confining pressure liquid injection port is communicated with the annular space of the high-temperature high-pressure kettle body and the plate model, and the plate model is provided with a heating temperature control system (34); the flat plate model comprises a model cover plate (47), a sand filling model (48) and a flat plate pressure-bearing cavity (49); the front side and the back side of the flat plate model are respectively provided with a Y-axis direction stepping motor (35), an X-axis direction stepping motor (36), a Y-axis direction sliding rail (37), an X-axis direction sliding rail (38), a Y-axis direction sliding block (39) and an X-axis direction sliding block (40), the Y-axis direction stepping motor is fixed at one end of the X-axis direction sliding block and is combined with the Y-axis direction sliding rail into a whole and is integrally installed on the X-axis direction sliding rail, the acoustoelectric detector (41) is fixed on the Y-axis direction sliding block and is driven by the Y-axis direction stepping motor and slides linearly along the Y-axis direction sliding rail to perform acoustoelectric scanning test, and the X-axis direction stepping motor drives the X-axis direction sliding block to slide linearly along the X-axis direction sliding rail; the displacement pump (1) is connected with a high-temperature high-pressure kettle body inlet (44) through a formation water intermediate container (14), a crude oil intermediate container (15) and a dry gas intermediate container (16), the confining pressure pump (2) is connected with a confining pressure liquid injection inlet (45), a kettle body outlet (46) is sequentially connected with an oil-gas separator (24), a gas meter (25) and an oil-gas chromatograph (26) through a back pressure valve (23), the top of the back pressure valve (23) is connected with a back pressure pump (3), the kettle inlet, the confining pressure liquid injection inlet, the kettle outlet and the back pressure valve are respectively provided with a pressure sensor, the heating temperature control system, the pressure sensor, the acoustoelectric detector, the Y-axis direction stepping motor and the X-axis direction stepping motor are all connected with an acoustoelectric test positioning control and data acquisition system (22), so that the acquisition of temperature, pressure, ultrasonic waves and resistivity data and the control of the displacement of the stepping motor are realized.
2. The oil-gas-water three-phase saturation testing device of the high-temperature and high-pressure flat plate model as claimed in claim 1, wherein in the flat plate model, a rubber sleeve is arranged between the model cover plate and the sand-filled model and is fastened through a fastening bolt to achieve complete sealing, and the sand-filled model is located in the flat plate pressure-bearing cavity.
3. The device for testing the three-phase saturation of oil, gas and water of the high-temperature high-pressure flat plate model as claimed in claim 1, wherein a line passing device (43) is arranged on the cover plate of the kettle body, and all electric wires and signal lines in the kettle body are connected with an acoustoelectric test positioning control and data acquisition system through the line passing device.
4. The device for testing the three-phase saturation of oil, gas and water of the high-temperature high-pressure flat plate model as claimed in claim 1, wherein the acoustoelectric detector comprises an acoustoelectric transmitting probe (50) and an acoustoelectric receiving probe (51).
5. The device for testing the oil-gas-water three-phase saturation of the high-temperature high-pressure flat-plate model as claimed in claim 1, wherein the acoustoelectric detector moves along the X/Y direction in the testing process and moves in a zigzag shape, so that the acoustoelectric scanning test of the acoustoelectric detector on the whole flat-plate model is completed.
6. The device for testing the three-phase saturation of oil, gas and water of the high-temperature high-pressure flat plate model as claimed in claim 1, wherein the high-temperature high-pressure autoclave body realizes 0-180 degrees of rotation through an autoclave body rotating mechanism (52).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816394A (en) * | 2021-03-15 | 2021-05-18 | 西南石油大学 | Oil-gas-water three-phase saturation testing device and method for high-temperature high-pressure flat plate model |
| CN114295616A (en) * | 2022-03-11 | 2022-04-08 | 西南石油大学 | Casing pipe detection equipment based on image recognition |
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2021
- 2021-03-15 CN CN202120581714.1U patent/CN214427236U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816394A (en) * | 2021-03-15 | 2021-05-18 | 西南石油大学 | Oil-gas-water three-phase saturation testing device and method for high-temperature high-pressure flat plate model |
| CN112816394B (en) * | 2021-03-15 | 2024-03-26 | 西南石油大学 | Device and method for testing oil-gas-water three-phase saturation of high-temperature high-pressure flat model |
| CN114295616A (en) * | 2022-03-11 | 2022-04-08 | 西南石油大学 | Casing pipe detection equipment based on image recognition |
| CN114295616B (en) * | 2022-03-11 | 2022-05-10 | 西南石油大学 | Casing detection equipment based on image recognition |
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