CN104749652A - Device and method for physically and quantitatively simulating oil-gas migration path in real time in on-line manner - Google Patents
Device and method for physically and quantitatively simulating oil-gas migration path in real time in on-line manner Download PDFInfo
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Abstract
The invention belongs to the technical field of oil-gas migration, and provides a device and a method for physically and quantitatively simulating an oil-gas migration path in real time in an on-line manner. The problem that the existing oil-gas migration only can be measured qualitatively is solved. A center control platform of the device is respectively connected with a control system and a monitoring system; a data processing and analyzing system is connected with a detecting system; the device also comprises a simulating box; the control system comprises a pressure control system, a temperature control system and an electrode control system; the simulating box is respectively connected with the pressure control system, the temperature control system and the electrode control system; the detecting system comprises a pressure detecting system, an electrode detecting and recording system and an oil and water metering system; the simulating box is respectively connected with the pressure detecting system, the electrode detecting and recording system and the oil and water metering system; and the data processing and analyzing system is respectively connected with the electrode detecting and recording system and the oil and water metering system. The existing quantitative measurement mode is omitted, and the device is high in precision and high in experimental defect and is convincing.
Description
Technical field
The present invention relates to oil-gas migration technical field, particularly relate to Quantitative Physical Simulation oil migration path field, specifically a kind of real-time online Quantitative Physical Simulation oil migration path device and method.
Background technology
Oil-gas migration is the difficulties that oil-gas exploration industry is badly in need of solving always.Before the nineties in 20th century, the focus of oil-gas migration research is the power of primary migration, phase, process and geochemical effect thereof.Since the nineties in 20th century, the migration behavior of oil gas in carrier bed is paid close attention to widely, this is because the secondary migration of hydrocarbon fluid in lake basin is an extremely inhomogenous process, even if in uniform pore media, there are (Schowalter, 1979 in the path that the migration of hydrocarbon fluid is also only limited in channel range; Demibicki et al., 1989; Catalan et al., 1992).Can infer from the migration phenomenon observed, path and the process of hydrocarbon fluid migration on different scale may be very similar, but still there is certain difference, some macroscopically can be considered the process of homogeneous on less yardstick often heterogeneous (Luo Xiaorong, 2003).
Oil migration path prediction is the basis that hydrocarbon-bearing pool location and oil-gas exploration are disposed.Physical simulation experiment is one of effective ways of research hydro carbons oil migration path.
Current PHYSICAL MODELING OF IN is carried out mainly for both direction, and one is how to become to hide for sandstone lens, and another how to control Tibetan for tomography.
Become Tibetan problem about sandstone lens, have more following researchs.R.J.Cordell (1976) is by the simulation of Hydrocarbon Migration And Accumulation process in and middle part sandstone lens northern to Texas, USA, think that the oil gas in oil source rock enters phacoid from the bottom of sandstone lens, and in phacoid, original water is discharged from top.Chen Zhangming etc. (1998) have carried out the migration of a series of sandstone lens oil and accumulation analogue experiment research, respectively in source bed, on, under sandstone profit replace differentiation and test.Simulated experiment result illustrates, the convex lens shape sandstone oil reservoir formation mechenism in source bed, is that capillarity impels profit to replace into Tibetan with source rock row hydrocarbon pressure; The outer convex lens body sandstone of source rock also can form oil reservoir by above-mentioned mechanism when there being gap to link up source rock and sand body; Take tomography as main thoroughfare, oil can cross over shale layer and to underliing the hole rock mass Migrations such as sandstone; Can the convex lens body sandstone in the outer seamless communication source rock of shale layer of source rock form hydrocarbon-bearing pool, need inquire into by further experiment.Once spattered (2000) such as brightness and simulated experiment was carried out to the sandstone lens petroleum accumulation surrounded by low infiltration sandrock, thought that oil filling in sandstone lens was subject to injection pressure, capillary pressure difference and buoyancy effect.By simulation, Zhang Yun peaks etc. (2002) think that the formation of lithologic oil pool under hydrocarbon source rock must meet following two necessary geologic conditions, namely hydrocarbon source rock superpressure be communicated with hydrocarbon source rock and underlie the tomography of sand body, wherein enough large superpressure provides the power that oil gas is migrated downwards, and tomography is then the passage that oil gas is migrated downwards.Jiang Zhenxue etc. (2003,2004) using NMR technology carries out experimental simulation to sandstone lens reservoir Filling process, Special attention will be given to wall rock condition is to the control action of lithologic oil pool, think (hydrocarbon concentration) after only having country rock oil saturation to reach certain thresholding, the resistance that the seepage force of oil-gas formation, diffusive force and capillary force could break through oil-gas migration enters rock core and becomes to hide.Wang Qianju etc. (2004) utilize High Temperature High Pressure lithologic reservoir forming analogue experiment installation, inquire into the Characteristics of Hydrocarbon Reservoiring (Filling process and reservoiring mechanism) of sandstone lens, the dynamic force balanced thought sandstone lens to become to hide be a process complexity, power type is various, interact, complete under composite power becomes to hide, and hydrocarbon source rock fuel delivery is more conducive to into Tibetan more greatly simultaneously.Wang Yongzhuo etc. (2006) carry out physical simulation for country rock oil saturation to the control that lithologic oil pool becomes to hide, experimental result shows under certain pressure condition, country rock oil saturation is larger, hydrocarbon supplying ability is stronger, in sand body, oil saturation is larger, and the one-tenth being more conducive to sand body is hidden.Li Yuanhao etc. (2009) are for the physical simulation that become Tibetan to carry out of Upper Triassic in Ordos Basin prolongation group hyposmosis lithologic oil pool, experimental result shows, no matter hydrocarbon source rock upwards or downwards arranges hydrocarbon, abnormal pressure is more conducive to more greatly low permeability reservoir and becomes to hide, become to hide efficiency higher, oil saturation is higher.
Become Tibetan problem about tomography, have more following researchs.Zhang Shanwen and once spattered brightness (2003) for tomography on the group petroleum migration of Zhanhua depression Guantao and assemble impact carried out physical simulation experiment research.Shang Erjie (2005) for geologic model, has carried out the physical simulation experiment research of oil control by fault with Northwestern Margin of Junggar Basin red clover isoflavone.Gong Xiumei (2005) is studied filled, the fortune collecting process of oil in South Bohai depression deep layer s_4 formation two kinds of Reservoir model by physical simulation experiment.Guo Kai (2010) transports gone simulation experiment study for the longitudinal transporting of the tomography control that to be coupled with reservoir heterogeneity.Lin Xiaoying etc. (2014) have carried out physical simulation experiment to low infiltration sandrock Natural gas migration and accumulation.Ding Wenlong (2014) has carried out physical simulation experiment to Hinterland of The Junggar Basin oil control by fault.Above-mentioned research shows, the Time And Space Distribution of fault transfer body controls the direction of petroleum-bearing fluid motion, path and distribution.
Above-mentioned achievement is all deterministic simulations, product mainly before simulation and the product after simulating launch metering and test, and picture charge pattern is carried out to the phenomenon in simulation process, to analyze possible oil migration path and fortune collecting process, the online quantitative simulation mentioned in all unrealized the present invention, and intake pressure and the regulatable feature of top hole pressure.
Above-mentioned simulation of oil-gas migration and accumulation is all depend on analogue experiment installation and method.Current physical simulation techniques and method do not solve real-time online in simulation process simultaneously and quantitatively detect oil saturation, with regulation and control import and export pressure really to realize voltage-controlled physical simulation feature, also just oil-gas migration Quantitative Physical Simulation and voltage-controlled physical simulation really cannot be realized.
Though existing oil migration path analogy method achieves the visual feature from 2 d-to-3 d, but still there is defect:
1) existing oil migration path physical simulation is all by detecting analysis to the picture charge pattern in simulation process or to product before and after simulation, it is main for all belonging to Qualitative physical modeling, do not realize the quantitative measuring ability of real-time online in simulation process, therefore do not reach the requirement of modern science and technology to experiment quantitative technique;
2) existing oil migration path physical simulating method or do not consider the impact of filled pressure on simulaed path, or only consider the impact of intake pressure on simulated experiment, owing to descending oil-gas migration by the domination of migration agent practically, and reservoir pressure is one of important migration agent, and oil-gas migration process is subject to intake pressure and top hole pressure impact simultaneously, namely the confined pressure in actual geological process and the impact of pressure release condition, therefore, prior art really do not solve voltage-controlled under simulating experiment technique;
3) current existing technology does not solve above-mentioned two problems simultaneously.
Summary of the invention
The object of the invention is to address the deficiencies of the prior art, provide that a kind of precision is high, experiment effect good, have more cogency real-time online Quantitative Physical Simulation oil migration path device and method.
In order to achieve the above object, a kind of real-time online Quantitative Physical Simulation oil migration path device of the present invention, comprise control system, detection system, Data Management Analysis system and center control platform, center control platform is connected with control system and monitoring system respectively, Data Management Analysis system is connected with detection system, also comprise analog unit, control system comprises control pressurer system, temperature control system and electrode control system, and analog unit is connected with control pressurer system, temperature control system and electrode control system respectively; Detection system comprises pressure detecting system, electrode detection register system and oil-water metering system, and analog unit is connected with pressure detecting system, electrode detection register system and oil-water metering system respectively; Data Management Analysis system is connected with electrode detection register system and oil-water metering system respectively; Analog unit comprises casing main body and hold down gag, casing main body comprises cabinet shell and Box Cover, it is Box Cover on the upside of it, the surrounding of Box Cover is provided with O-ring seal, hold down gag is arranged on four corners of casing main body through Box Cover, the upper and lower both sides of casing main body are run through cabinet shell and are evenly equipped with resistance probe, pressure probe and temperature probe, and four sides of casing main body are provided with entry/exit gas port, and the pressure regulator valve of control pressurer system is connected respectively with the entry/exit gas port of analog unit.
Observational measurement mode in the past changed by experimental provision of the present invention, abandon to adopt in the past and measured inlet and measure export volume, and then obtain relevant experimental data by the loss of centre, this experimental data is extremely inaccurate, can not discharge the disturbing factor in experiment, and the present invention changes this present situation completely.
Further, the upside of described analog unit is provided with visual transparency cover, is provided with movable roller bearing on the downside of it, casing outside framework is provided with outside it, be provided with support outside casing outside framework to connect, casing outside framework is connected for movable with between support, and frame bottom is provided with the automatic castor of strap brake.
It is visual transparency cover on the upside of analog unit of the present invention, the dust trajectory of oil gas can be seen by naked eyes, on this basis, in conjunction with the data processing in later stage, whether the data can calculated more accurately in experimentation are correct, be connected for movable between analog unit with support, comprise and being movably hinged, bearing connects, and these connected modes achieve 360 degree of rotations of analog unit, observation and the detection of different angles can be carried out, achieve three-dimensional observation and detection.
Further, resistance probe, pressure probe and temperature probe in casing main body and casing main body are for being tightly connected.
The experiment that the present invention studies, because oil-gas migration is in the environment having pressure and pressure, is tightly connected so the equipment on analog unit is.
Further, control pressurer system is connected with water tank and high-pressure hydraulic pump, is connected after high-pressure hydraulic pump is connected with tensimeter, high-pressure valve and pressure maintaining valve respectively with pressure regulator valve.
Further, described resistance probe is 50-100, and pressure probe is 32-64, and temperature probe is 1-2.
Probe number of the present invention can experimental difference need to adjust, and number of probes is here only the most preferred quantity of experimental subjects of the present invention.
Further, resistance probe is two pressing mold miniature probes, and probe body is that the compacting of ABS plastic bimodulus forms, the silver-colored ring that electrode adopts 2.0mm wide, probe is provided with n potential electrode En and power pole Pn, and transmitting electrode Pn is connected with power supply, and potential electrode En is connected with resistance measuring instrument.
Resistance probe of the present invention is as shown in Figure 7 for measuring its measuring principle of potential difference (PD), probe has n electrode, supplies electric current I, after setting up electric field in the earth formation, carry out potential difference measurement with potential electrode E1, E2 by power pole P1 and P2.This potential difference (PD) reflects electric field distribution characteristic, thus the change of reflected resistance rate.Resistivity measurement supply low frequency (frequency stepping is adjustable) square wave ac, measures the potential difference (PD) Δ U between E1 and E2
e, be calculated as follows resistivity
R＝KΔU
E/I
In formula, K is K factor, and it is relevant with type with the size of probe; Δ U
mNfor potential difference (PD), V; I is current value, A.
Further, hold down gag comprises wobble pump and hydraulic cylinder, and wobble pump and hydraulic cylinder and analog unit junction are for being tightly connected.
Further, described temperature control system comprises preheating device and hot water circulating pump, and preheating device is connected with hot water circulating pump, and hot water circulating pump is arranged on the outside of analog unit.
Here the requirement of hot water cyclesystem in various experiment is different, can experimental difference finely tune.
Utilize said apparatus to carry out a method for real-time online Quantitative Physical Simulation oil migration path, comprise the following steps:
1. prepare associated analog material, detect simulation system equipment;
2. experimentally content and experiment purpose construct empirical model, varigrained hydrophilic silica sand is positioned in casing, according to the pattern of wants different shape physical model of simulated experiment object, to simulate tomography, due to the porosity of tomography and perviousness high, therefore select the high silica sand of Relative Size to be modeled to tomography shape;
3. after arranging empirical model according to research purpose, after checking that each instrument, parts, flow process pipeline are errorless, rotating wobble pump utilizes four small liquid jars to promote Box Cover, empirical model is carried out mechanical ramming, maximum pressure can reach 1MPa, compacting is stopped, then fastening hold down gag after reaching requirement of experiment;
4. the preheat temperature of design temperature control system, starts preheating device and hot water circulating pump, makes empirical model reach predetermined temperature;
5. according to simulated experiment requirement, regulate intake pressure system and top hole pressure system, make inlet and outlet pressure reach experiment purpose requirement;
6. select inlet and delivery outlet, connect constant current constant voltage pump, setting rate of injection starts displacement step, opens center control platform and enters data acquisition window;
7. gather in experimentation and preserve each measuring point pressure data and oil saturation delta data, and real-time camera or video recording, after reaching requirement of experiment, stop experiment, carry out Data Processing in Experiment;
8. small step below Data Processing in Experiment:
1) data collected of photograph or video recording and Data Management Analysis system;
2) bottom of experimentally simulating is different, and resistance rate measures the square wave ac of supply different frequency, measures the potential difference (PD) Δ U between En
e, be calculated as follows resistivity
R＝KΔU
E/I
In formula, K is K factor, and it is relevant with type with the size of probe; Δ U
mNfor potential difference (PD), V; I is current value, A;
According to the formation resistivity measured, calculate water saturation Sw by Archie equation:
In formula, Rt is that namely formation rock oil-containing resistivity survey resistivity, Ω m; I
rfor resistivity ratio; Rw is the complete moisture resistivity of rock, Ω m; Sw is water saturation, %; B is coefficient; N is saturation exponent; Wherein by the value of coefficient b and coefficient n in rock core displacement test determination formula, the uniform dielectric of application known resistivity demarcates electrode coefficient;
3) in physical simulation process, sand body is saturated by local water, and under compacting certain condition, according to skeleton (i.e. hole) invariance principle, water saturation is Sw, then oil saturation value is
So＝1－Sw
4) according to step 2) and 3) in processing mode, by formula and processing procedure typing center control platform, center control platform will directly present oil saturation data;
5) according to step 4) in Plotting data trend map or other and the relevant data of experiment.
Beneficial effect of the present invention has:
(1) analog unit of the present invention can 360 degree of rotations, really realize three-dimensional visualization feature, and the image three-dimensional realized completely in simulation process is followed the trail of;
(2) in simulated experiment process of the present invention, real-time online computer quantitative detects oil saturation function, and real-time online gathers pressure data function in analog unit automatically, data in migration process are directly exported by computer, really realize real-time online quantification to detect and datamation function, integrate quantification and detect and the automatic processing capacity of computer; The change of the different time diverse location oil saturation that can accurately obtain can realize following the trail of oil migration path very well; The change of the different time diverse location pressure that can accurately obtain can realize following the trail of oil migration path upward pressure change object very well.
(3) the present invention's single intake pressure control system than before, this method has invented intake pressure control system and top hole pressure control system in simulated experiment process, simultaneously can confined pressure and the impact of pressure release condition change on dust trajectory in plastid in analog.
(4) technical scheme of the present invention has very strong directive significance for research oil-gas migration path technique field, and the defect of technical scheme in the past can be taken on a new look by it, has good practicality and promotional value.
Accompanying drawing explanation
Fig. 1 apparatus of the present invention one-piece construction schematic diagram;
Fig. 2 is analog unit perspective view in Fig. 1;
Fig. 3 is analog unit plan structure schematic diagram in Fig. 2;
Fig. 4 is data processing schematic diagram in analog unit actual experiment;
The identical top hole pressure 0.1MPa that Fig. 5 the present invention realizes namely with under pressure release condition, the different oil saturation change curve schematic diagram in time filling certain electrode position under pressure and detect;
The identical injection pressure 20MPa that Fig. 6 the present invention realizes is namely with under confined pressure condition, and the oil saturation that under different top hole pressure, certain electrode position detects is change curve schematic diagram in time;
Fig. 7 the present invention measures potential difference measurement principle schematic.
In figure: 1 support; 2 casing outside frameworks; 3 analog units; 4 visual transparency covers; 5 movable roller bearings; 6 resistance probes; 7 pressure probes; 8 pressure regulator valves; 9 pressure maintaining valves; 10 high-pressure valves; 11 tensimeters; 12 power supplies; 13 resistance measuring instruments; 14 electrode systems; 15 test mediums; 301 hold down gags; 302 entry/exit gas ports; 303 Box Covers.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, a kind of real-time online Quantitative Physical Simulation oil migration path device, comprise control system, detection system, Data Management Analysis system and center control platform, center control platform is connected with control system and monitoring system respectively, Data Management Analysis system is connected with detection system, also comprise analog unit 3, control system comprises control pressurer system, temperature control system and electrode control system, and analog unit 3 is connected with control pressurer system, temperature control system and electrode control system respectively; Detection system comprises pressure detecting system, electrode detection register system and oil-water metering system, and analog unit 3 is connected with pressure detecting system, electrode detection register system and oil-water metering system respectively; Data Management Analysis system is connected with electrode detection register system and oil-water metering system respectively; Analog unit 3 comprises casing main body and hold down gag 301, casing main body comprises cabinet shell and Box Cover 303, it is Box Cover 303 on the upside of it, the surrounding of Box Cover 303 is provided with O-ring seal, hold down gag 301 is arranged on four corners of casing main body through Box Cover 303, the upper and lower both sides of casing main body are run through cabinet shell and are evenly equipped with resistance probe 6, pressure probe 7 and temperature probe, four sides of casing main body are provided with entry/exit gas port 302, and the pressure regulator valve 8 of control pressurer system is connected respectively with the entry/exit gas port 302 of analog unit.
As shown in Figure 2, the upside of described analog unit 3 is provided with visual transparency cover 4, movable roller bearing 5 is provided with on the downside of it, casing outside framework 2 is provided with outside it, be provided with support 1 outside casing outside framework 2 to connect, be connected for movable between casing outside framework 2 with support 1, bottom support 1, be provided with the automatic castor of strap brake.
Resistance probe 6 in casing main body, pressure probe 7 and temperature probe and casing main body are for being tightly connected.
Control pressurer system is connected with water tank and high-pressure hydraulic pump, is connected after high-pressure hydraulic pump is connected with tensimeter 11, high-pressure valve 10 and pressure maintaining valve 9 respectively with pressure regulator valve 8.
Described resistance probe 6 is 50-100, and pressure probe 7 is 32-64, and temperature probe is 1-2.
Resistance probe 6 is two pressing mold miniature probes, probe body is that the compacting of ABS plastic bimodulus forms, and the silver-colored ring that electrode adopts 2.0mm wide, probe is provided with n potential electrode En and power pole Pn, transmitting electrode Pn is connected with power supply, and potential electrode En is connected with resistance measuring instrument.
Hold down gag 301 comprises wobble pump and hydraulic cylinder, and wobble pump and hydraulic cylinder and analog unit 3 junction are for being tightly connected.
Described temperature control system comprises preheating device and hot water circulating pump, and preheating device is connected with hot water circulating pump, and hot water circulating pump is arranged on the outside of analog unit 3.
Resistance probe of the present invention is as shown in Figure 7 for measuring its measuring principle of potential difference (PD), probe forms electrode system 14 by n electrode, power supply 12 supplies electric current I by power pole P1 and P2, set up electric field in test medium 15 stratum after, resistance measuring instrument 13 potential electrode E1, E2 carry out potential difference measurement.This potential difference (PD) reflects electric field distribution characteristic, thus the change of reflected resistance rate.
Utilize described device to carry out a method for real-time online Quantitative Physical Simulation oil migration path, comprise the following steps:
1. prepare associated analog material, detect simulation system equipment;
2. experimentally content and experiment purpose construct empirical model, varigrained hydrophilic silica sand is positioned in casing, according to the pattern of wants different shape physical model of simulated experiment object, to simulate tomography, due to the porosity of tomography and perviousness high, therefore select the high silica sand of Relative Size to be modeled to tomography shape;
3. after arranging empirical model according to research purpose, after checking that each instrument, parts, flow process pipeline are errorless, rotating wobble pump utilizes four small liquid jars to promote Box Cover, empirical model is carried out mechanical ramming, maximum pressure can reach 1MPa, compacting is stopped, then fastening hold down gag after reaching requirement of experiment;
4. the preheat temperature of design temperature control system, starts preheating device and hot water circulating pump, makes empirical model reach predetermined temperature;
5. according to simulated experiment requirement, regulate intake pressure system and top hole pressure system, make inlet and outlet pressure reach experiment purpose requirement;
6. select inlet and delivery outlet, connect constant current constant voltage pump, setting rate of injection starts displacement step, opens center control platform and enters data acquisition window;
7. gather in experimentation and preserve each measuring point pressure data and oil saturation delta data, and real-time camera or video recording, after reaching requirement of experiment, stop experiment, carry out Data Processing in Experiment;
8. small step below Data Processing in Experiment:
1) data collected of photograph or video recording and Data Management Analysis system;
2) bottom of experimentally simulating is different, and resistance rate measures the square wave ac of supply different frequency, measures the potential difference (PD) Δ U between En
e, be calculated as follows resistivity
R＝KΔU
E/I
In formula, K is K factor, and it is relevant with type with the size of probe; Δ U
mNfor potential difference (PD), V; I is current value, A;
3) according to the formation resistivity measured, water saturation Sw is calculated by Archie equation:
In formula, Rt is that namely formation rock oil-containing resistivity survey resistivity, Ω m; I
rfor resistivity ratio; Rw is the complete moisture resistivity of rock, Ω m; Sw is water saturation, %; B is coefficient; N is saturation exponent; Wherein by the value of coefficient b and coefficient n in rock core displacement test determination formula, the uniform dielectric of application known resistivity demarcates electrode coefficient;
In physical simulation process, sand body is saturated by local water, and under compacting certain condition, according to skeleton (i.e. hole) invariance principle, water saturation is Sw, then oil saturation value So is
So＝1－Sw
4) according to step 2) and 3) in processing mode, by formula and processing procedure typing center control platform, center control platform will directly present oil saturation data;
5) according to step 4) in Plotting data trend map or other and the relevant data of experiment.
Embodiment 1
As shown in Figure 4, the present invention detects oil saturation function by real-time online in simulated experiment, realize the spatial variations at certain time oil saturation, achieve the function of following the trail of oil migration path, isoline on figure is oil saturation isoline, what arrow indicated is oil migration approach, upwards migrates along tomography.
Embodiment 2
Schematic diagram as shown in Figure 5 and Figure 6 can be drawn after data in following table 1 being carried out processing, clearly can find out the change of oil saturation under different condition, achieve the real time on-line monitoring of experimental data.
Table 1
Claims (9)
1. a real-time online Quantitative Physical Simulation oil migration path device, comprise control system, detection system, Data Management Analysis system and center control platform, center control platform is connected with control system and monitoring system respectively, Data Management Analysis system is connected with detection system, it is characterized in that: also comprise analog unit (3), control system comprises control pressurer system, temperature control system and electrode control system, and analog unit (3) is connected with control pressurer system, temperature control system and electrode control system respectively, detection system comprises pressure detecting system, electrode detection register system and oil-water metering system, and analog unit (3) is connected with pressure detecting system, electrode detection register system and oil-water metering system respectively, Data Management Analysis system is connected with electrode detection register system and oil-water metering system respectively, analog unit (3) comprises casing main body and hold down gag (301), casing main body comprises cabinet shell and Box Cover (303), it is Box Cover (303) on the upside of it, the surrounding of Box Cover (303) is provided with O-ring seal, hold down gag (301) is arranged on four corners of casing main body through Box Cover (303), the upper and lower both sides of casing main body are run through cabinet shell and are evenly equipped with resistance probe (6), pressure probe (7) and temperature probe, four sides of casing main body are provided with entry/exit gas port (302), the pressure regulator valve (8) of control pressurer system is connected respectively with the entry/exit gas port (302) of analog unit.
2. real-time online Quantitative Physical Simulation oil migration path device according to claim 1, it is characterized in that: the upside of described analog unit (3) is provided with visual transparency cover (4), movable roller bearing (5) is provided with on the downside of it, casing outside framework (2) is provided with outside it, casing outside framework (2) outside is provided with support (1) and connects, be connected for movable between casing outside framework (2) with support (1), support (1) bottom is provided with the automatic castor of strap brake.
3. real-time online Quantitative Physical Simulation oil migration path device according to claim 1, is characterized in that: the resistance probe (6) in casing main body, pressure probe (7) and temperature probe and casing main body are for being tightly connected.
4. real-time online Quantitative Physical Simulation oil migration path device according to claim 1, it is characterized in that: control pressurer system is connected with water tank and high-pressure hydraulic pump, be connected with pressure regulator valve (8) after high-pressure hydraulic pump is connected with tensimeter (11), high-pressure valve (10) and pressure maintaining valve (9) respectively.
5. real-time online Quantitative Physical Simulation oil migration path device according to claim 1, is characterized in that: described resistance probe (6) is 50-100, and pressure probe (7) is 32-64, and temperature probe is 1-2.
6. real-time online Quantitative Physical Simulation oil migration path device according to claim 1, it is characterized in that: resistance probe (6) is two pressing mold miniature probe, probe body is that the compacting of ABS plastic bimodulus forms, the silver-colored ring that electrode adopts 2.0mm wide, probe is provided with n potential electrode En and power pole Pn, transmitting electrode Pn is connected with power supply, and potential electrode En is connected with resistance measuring instrument.
7. real-time online Quantitative Physical Simulation oil migration path device according to claim 1, it is characterized in that: hold down gag (301) comprises wobble pump and hydraulic cylinder, wobble pump and hydraulic cylinder and analog unit (3) junction are for being tightly connected.
8. real-time online Quantitative Physical Simulation oil migration path device according to claim 1, it is characterized in that: described temperature control system comprises preheating device and hot water circulating pump, preheating device is connected with hot water circulating pump, and hot water circulating pump is arranged on the outside of analog unit (3).
9. utilize the device described in claim 1 to carry out a method for real-time online Quantitative Physical Simulation oil migration path, it is characterized in that: comprise the following steps:
1. prepare associated analog material, detect simulation system equipment;
2. experimentally content and experiment purpose construct empirical model, varigrained hydrophilic silica sand is positioned in casing, according to the pattern of wants different shape physical model of simulated experiment object, to simulate tomography, due to the porosity of tomography and perviousness high, therefore select the high silica sand of Relative Size to be modeled to tomography shape;
3. after arranging empirical model according to research purpose, after checking that each instrument, parts, flow process pipeline are errorless, rotating wobble pump utilizes four small liquid jars to promote Box Cover, empirical model is carried out mechanical ramming, maximum pressure can reach 1MPa, compacting is stopped, then fastening hold down gag after reaching requirement of experiment;
4. the preheat temperature of design temperature control system, starts preheating device and hot water circulating pump, makes empirical model reach predetermined temperature;
5. according to simulated experiment requirement, regulate intake pressure system and top hole pressure system, make inlet and outlet pressure reach experiment purpose requirement;
6. select inlet and delivery outlet, connect constant current constant voltage pump, setting rate of injection starts displacement step, opens center control platform and enters data acquisition window;
7. gather in experimentation and preserve each measuring point pressure data and oil saturation delta data, and real-time camera or video recording, after reaching requirement of experiment, stop experiment, carry out Data Processing in Experiment;
8. small step below Data Processing in Experiment:
1) data collected of photograph or video recording and Data Management Analysis system;
2) bottom of experimentally simulating is different, and resistance rate measures the square wave ac of supply different frequency, measures the potential difference (PD) Δ U between En
e, be calculated as follows resistivity
R＝KΔU
E/I
In formula, K is K factor, and it is relevant with type with the size of probe; Δ U
mNfor potential difference (PD), V; I is current value, A;
According to the formation resistivity measured, calculate water saturation Sw by Archie equation:
In formula, Rt is that namely formation rock oil-containing resistivity survey resistivity, Ω m; I
rfor resistivity ratio; Rw is the complete moisture resistivity of rock, Ω m; Sw is water saturation, %; B is coefficient; N is saturation exponent, and wherein by the value of coefficient b and coefficient n in rock core displacement test determination formula, the uniform dielectric of application known resistivity demarcates electrode coefficient;
In physical simulation process, sand body is saturated by local water, and under compacting certain condition, according to skeleton (i.e. hole) invariance principle, water saturation is Sw, then oil saturation value is So=1-Sw
3) according to step 2) and 3) in processing mode, by formula and processing procedure typing center control platform, center control platform will directly present oil saturation data.
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| CN104931676A (en) * | 2015-07-09 | 2015-09-23 | 中国石油大学(华东) | Lithological association structure-controlled oil and gas migration and accumulation physical simulation system and experimental method |
| CN105178954A (en) * | 2015-10-29 | 2015-12-23 | 中国石油大学(华东) | Unconformity screened oil-gas reservoir physical simulation experimental device and method |
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| CN109270252A (en) * | 2018-11-09 | 2019-01-25 | 浙江海洋大学 | A kind of experimental provision and method of the migration of mobile phase oil pollution porous media |
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| CN104931676A (en) * | 2015-07-09 | 2015-09-23 | 中国石油大学(华东) | Lithological association structure-controlled oil and gas migration and accumulation physical simulation system and experimental method |
| CN105178954A (en) * | 2015-10-29 | 2015-12-23 | 中国石油大学(华东) | Unconformity screened oil-gas reservoir physical simulation experimental device and method |
| CN106568981A (en) * | 2016-08-04 | 2017-04-19 | 中国石油大学(北京) | Automatic core displacement test device, and control method |
| US11415721B2 (en) | 2018-06-05 | 2022-08-16 | Petrochina Company Limited | Resistivity measurement method, device and system |
| CN109667575B (en) * | 2018-10-24 | 2022-04-29 | 西南石油大学 | Probe method well pattern model water drive effect measuring device |
| CN109667575A (en) * | 2018-10-24 | 2019-04-23 | 西南石油大学 | A kind of novel probe method well pattern model waterflooding effect measuring device |
| CN109270252A (en) * | 2018-11-09 | 2019-01-25 | 浙江海洋大学 | A kind of experimental provision and method of the migration of mobile phase oil pollution porous media |
| CN111638685A (en) * | 2019-03-01 | 2020-09-08 | 北京国双科技有限公司 | Simulation system construction method and device |
| CN110068592A (en) * | 2019-05-06 | 2019-07-30 | 中国石油大学(北京) | Oil gas water transported simulation device and method |
| CN111402695A (en) * | 2020-05-16 | 2020-07-10 | 东北石油大学 | Device for simulating fault opening and closing by using wettability change and simulation method thereof |
| CN113884422A (en) * | 2020-07-03 | 2022-01-04 | 神华神东煤炭集团有限责任公司 | Three-dimensional analog simulation visual tracer gas monitoring system and monitoring method |
| CN114993885A (en) * | 2022-07-18 | 2022-09-02 | 中国石油大学(华东) | Deep sea deep layer oil and gas transportation and gathering visual experimental device under multi-field coupling effect |
| CN114993885B (en) * | 2022-07-18 | 2022-11-04 | 中国石油大学(华东) | Deep sea deep layer oil and gas transportation and gathering visual experimental device under multi-field coupling effect |
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