CN106291659A - The detecting system of saturated fluid reservoir model - Google Patents
The detecting system of saturated fluid reservoir model Download PDFInfo
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- CN106291659A CN106291659A CN201510257324.8A CN201510257324A CN106291659A CN 106291659 A CN106291659 A CN 106291659A CN 201510257324 A CN201510257324 A CN 201510257324A CN 106291659 A CN106291659 A CN 106291659A
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- reservoir model
- detecting system
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- vibration signal
- piezoelectric ceramics
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Abstract
The invention discloses the detecting system of a kind of saturated fluid reservoir model, belong to technical field of physical geography, solve the technical problem of the detection being difficult to the vibration signal across frequency band in prior art.This detecting system includes reservoir model, fluid input device, sender unit and signal supervisory instrument；Described fluid input device is for injecting fluid in described reservoir model；Described sender unit is arranged at the surface of described reservoir model, and described sender unit is for stacking piezoelectric ceramics, for launching vibration signal to described reservoir model；Described signal supervisory instrument for carrying out the reflection detection of vibration signal to the test point of described reservoir model.The present invention can be used for the physical simulation experiment of seismic prospecting.
Description
Technical field
The present invention relates to technical field of physical geography, specifically, relate to the inspection of a kind of saturated fluid reservoir model
Examining system.
Background technology
Along with oil exploration technology is developed so far, large-scale oil gas field finds the most substantially, therefore improves old oil
The recovery ratio in field also becomes more and more important.The unique effective way improving existing oil-gas reservoir recovery ratio is further
Understand fully anisotropism and the situation of rock interior oily of rock interior structure, in order to accomplish this point, generally
The mode of seismic survey method can be used.Seismic survey refers to, using explosive as focus (i.e. artificial earthquake), utilize
The situation on seismic reflection sonic detection stratum.Rock stratum is containing fluid, without fluid or containing differences such as different fluid
In the case of, velocity of wave and the amplitude of reflection sound wave can be different.Utilize this characteristic, underground fluid can be analyzed
Character and monitor fluid migration and spread condition.And the research to seismic prospecting, general by physical modeling's
Method realizes.
Physical modeling is by carrying out the method that real physical process is simulated in Physical Experiment in the lab.Tool
Body is that actual landform is reduced into physical model, then utilizes the detection of the vibration signals such as sound wave (or ultrasound wave)
Simulate the detection of field seismic wave.When the reflection that physical model carries out vibration signal detects, vibration signal
Reflecting effect both relevant with the inside character of thin film model, relevant with the frequency of vibration signal again.Such as, when
Vibration signal is when high frequency becomes low frequency, and in the thin film model of oil-containing, the reflecting effect of vibration signal shows as amplitude
Increase, propagation time delay.Therefore, the change of this amplitude and phase place may be used for the inspection of thin layer of fluid thickness
Survey and the estimation of fluid type.
The present inventor finds during realizing the present invention, and prior art at least exists techniques below problem: mesh
In front physical simulation experiment, generally use ultrasound probe to produce vibration signal, but ultrasound probe can produce
The narrower bandwidth of raw vibration signal, it is difficult to realization is across the detection of the vibration signal of frequency band.
Summary of the invention
It is an object of the invention to provide the detecting system of a kind of saturated fluid reservoir model, to solve prior art
In be difficult to the technical problem of detection of vibration signal across frequency band.
The present invention provides the detecting system of a kind of saturated fluid reservoir model, including reservoir model, fluid input dress
Put, sender unit and signal supervisory instrument；
Described fluid input device is for injecting fluid in described reservoir model；
Described sender unit is arranged at the surface of described reservoir model, and described sender unit is for stacking pressure
Electroceramics, for launching vibration signal to described reservoir model；
Described signal supervisory instrument for carrying out the reflection detection of vibration signal to the test point of described reservoir model.
Further, stack described in the frequency range of vibration signal that piezoelectric ceramics launches be 1kHz extremely
200kHz。
Preferably, the saturated thin layer of fluid of described reservoir model is divided into the subregion that at least two is mutually isolated, institute
State fluid input device and inject water and oil to different subregions respectively.
Further, described reservoir model includes two-layer fragile material, and is positioned at described two-layer fragile material
Between saturated thin layer of fluid.
Preferably, described fragile material is epoxy resin or lucite.
Preferably, described saturated thin layer of fluid is sandstone or imitative sandstone material.
Further, if described in stack the dry tablet piezoelectric ceramics that piezoelectric ceramics includes being stacked.
Preferably, the surface being close to described reservoir model of piezoelectric ceramics is stacked described in and away from described reservoir mould
The surface of type, it is possible to simultaneously launch that amplitude is identical, the vibration signal of opposite in phase.
Further, described signal supervisory instrument be additionally operable to described stack piezoelectric ceramics away from described reservoir
The surface of model carries out the detection of vibration signal.
Preferably, described signal supervisory instrument is Scan laser measure instrument.
Present invention offers following beneficial effect: the detecting system of the saturated fluid reservoir model that the present invention provides
In, use and stack piezoelectric ceramics as sender unit, launch vibration signal to reservoir model.Because stacking
Piezoelectric ceramics is generally operational in non-resonant condition, and has the biggest bandwidth of operation, so to saturated fluid reservoir
When layer model carries out test experience, it is possible to realization is across the detection of the vibration signal of frequency band.
Other features and advantages of the present invention will illustrate in the following description, and, part from description
In become apparent, or by implement the present invention and understand.The purpose of the present invention and other advantages can be passed through
Structure specifically noted in description, claims and accompanying drawing realizes and obtains.
Accompanying drawing explanation
For the technical scheme in the clearer explanation embodiment of the present invention, required in embodiment being described below
The accompanying drawing wanted does simply to be introduced:
Fig. 1 is the schematic diagram of the detecting system of the saturated fluid reservoir model that the embodiment of the present invention provides；
Fig. 2 is the fundamental diagram of the detecting system of the saturated fluid reservoir model that the embodiment of the present invention provides；
Fig. 3 is the schematic diagram stacking piezoelectric ceramics in Fig. 1.
Detailed description of the invention
Embodiments of the present invention are described in detail, whereby to the present invention how below with reference to drawings and Examples
Application technology means solve technical problem, and the process that realizes reaching technique effect can fully understand and real according to this
Execute.As long as it should be noted that do not constitute conflict, in each embodiment in the present invention and each embodiment
Each feature can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
The embodiment of the present invention provides detecting system and the detection method of a kind of saturated fluid reservoir model, it is possible in room
Under the conditions of Nei, the saturated reservoir model of convection cell carries out broadband measurement, such that it is able to the stream estimated in saturated reservoir
Body composition.
As depicted in figs. 1 and 2, this detecting system mainly includes reservoir model 1, fluid input device 2, letter
Number discharger and signal supervisory instrument.
Reservoir model 1 includes two-layer fragile material 12, and the saturated flow between two-layer fragile material 12
Body thin layer 11.Wherein, two-layer fragile material 12 can use commaterial, preferably epoxy resin or have
Machine glass, saturated thin layer of fluid 11 is preferably sandstone or imitative sandstone material.
Fluid input device 2 is for injecting fluid in the saturated thin layer of fluid 11 of reservoir model 1, by inputting
Fluid selects and flow controlling unit controls the input kind of fluid, flow and flow velocity.As a preferred version,
Saturated thin layer of fluid 11 can be divided into the subregion that at least two is mutually isolated, and fluid input device 2 is respectively to difference
Subregion inject water and oil.In the present embodiment, saturated thin layer of fluid 11 is divided into three subregions, each subregion
Being provided with inlet, first subregion injects water, and second subregion injects oil, and the 3rd subregion injection gas (can
To be the gases such as methane), enable the testing result of three subregions mutually to compare.It addition, at each inlet
Offside be both provided with valve, in order to when needed by saturated thin layer of fluid 11 fluid discharge.
Sender unit is arranged at the surface of reservoir model 1, sender unit for stacking piezoelectric ceramics 3,
For launching vibration signal to reservoir model 1.Stacking piezoelectric ceramics 3 as focus, it is by signal generator warp
The voltage drive signals of ceramic driving power supply output is converted into the vibration signal of sound wave or ultrasound wave to reservoir model 1
Internal emission, the frequency range of its vibration signal launched can reach 1kHz to 200kHz.
If as it is shown on figure 3, stacking the dry tablet piezoelectric ceramics 11 that piezoelectric ceramics includes being stacked, these piezoelectric ceramics
11 physics series connection, electrical parallel or series connection, and the two ends up and down stacking piezoelectric ceramics are insulation ceramics 12,
And lamination-type piezoelectric ceramics outer surface spray insulation paint.The thickness of the every piezoelectric ceramics 11 being positioned at centre exists
About 0.1mm, stacks piezoelectric ceramics both sides and is coated with conductive layer 13, respectively anelectrode and negative electrode, with pottery
Driving power supply is connected.The efficiency stacking piezoelectric ceramics is higher than monolithic piezoelectric ceramic, by a pressurized, all of
Piezoelectric ceramics all can electrify.
Stacking piezoelectric ceramics under external signal drives during vibration, its upper and lower surfaces can produce amplitude phase respectively
Same, the vibration signal of opposite in phase.It is, after stacking the surface that piezoelectric ceramics is arranged at reservoir model,
It is close to the surface of reservoir model and away from the surface of reservoir model, it is possible to launch that amplitude is identical, phase place phase simultaneously
Anti-vibration signal.
Signal supervisory instrument is preferably Scan laser measure instrument, for vibrating the test point of reservoir model
The reflection detection of signal.Further, signal supervisory instrument can be also used for stack piezoelectric ceramics away from
The surface of reservoir model carries out the detection of vibration signal.
As depicted in figs. 1 and 2, in the present embodiment, the scanning laser head 4 of Scan laser measure instrument is lifted on
Above reservoir model 1, the vibration signal of each test point that can be good to focus and reservoir model 1 surface set enters
Row detection.The detection of its one-shot measurement is counted at most up to 512 × 512, and measuring frequency range can be from 1Hz
To 350kHz.As long as the distribution of shot point and test point meets accurate positioning, is evenly distributed and covers uniformly, so that it may
To use the seismic data process programs such as existing controller, decoder and data storage, figure show after acquisition
Process, and finally give the reflected signal image of saturated fluid reservoir under different frequency.
The detection method of the saturated fluid reservoir model that the embodiment of the present invention provides comprises the following steps:
S1: piezoelectric ceramics will be stacked be arranged at the surface of reservoir model.
Concrete, multiple piezoelectric ceramics that stack can be arranged on the surface of reservoir model, make to stack piezoelectric ceramics
The surface of the vibration signal surface of emission and reservoir model be close to.
S2: utilize the vibration signal stacking piezoelectric ceramics to reservoir model transmitting different frequency, and to reservoir model
Test point carry out different frequency vibration signal reflection detection.
The signal of various frequencies that signal generator output experiment needs, transmit after ceramic driving power supply amplifies to
Stack piezoelectric ceramics, stack piezoelectric ceramics and just can send the vibration signal of corresponding frequencies.First at reservoir model
Under the state (drying regime) of unimplanted fluid, utilize the different frequency of signal supervisory instrument detection reservoir model
The reflected signal of vibration signal and record, can be as contrasting data.
S3: injecting fluid in reservoir model, the saturated thin layer of fluid to reservoir model reaches saturated.
Reservoir model in the present embodiment is divided into three subregions, so by fluid input device respectively to reservoir model
In first subregion and second subregion inject water and oil, until first subregion and second subregion reach full
With, and the 3rd subregion is not injected into fluid (or injecting gas).Reservoir model constantly injects fluid the most saturated,
It is saturated fluid reservoir model.
S4: utilize the vibration signal stacking piezoelectric ceramics to reservoir model transmitting different frequency, and to reservoir model
Test point carry out different frequency vibration signal reflection detection.
Stacking piezoelectric ceramics and just launch the vibration signal of various frequencies to saturated fluid reservoir model, signal detection fills
Put the reflection detection that saturated fluid reservoir model can be carried out different frequency signals.
In the detecting system of the saturated fluid reservoir model that the embodiment of the present invention provides and detection method, employing stacks
Piezoelectric ceramics, as sender unit, launches vibration signal to reservoir model.Because it is general to stack piezoelectric ceramics
It is operated in non-resonant condition, has that volume is little, lightweight, resolution is high, fast response time High power output, change
Can not generate heat the advantages such as drive circuit is relatively easy by efficiency height.The more important thing is, stack piezoelectric ceramics and have the biggest
Bandwidth of operation, so when saturated fluid reservoir model is carried out test experience, it is possible to realize across frequency band (1kHz
To 200kHz) the detection of vibration signal.Further, above-mentioned in frequency band range, stack piezoelectric ceramics and launch
The frequency of vibration signal can consecutive variations so that the detection that frequency is changed by saturated fluid reservoir model is more
Finely.It addition, stack piezoelectric ceramics also have the advantage that output is big, it can drive bearing of thousands of newton
Carry, therefore can apply to the detection of the bigger saturated fluid reservoir model of thickness.
In the present embodiment, stack the surface being close to reservoir model of piezoelectric ceramics and away from the surface of reservoir model,
Can launch that amplitude is identical, the vibration signal of opposite in phase, the detection side that therefore embodiment of the present invention provides simultaneously
Method also includes:
S5: the surface away from reservoir model stacking piezoelectric ceramics is carried out the inspection of the vibration signal of different frequency
Survey.
This step Tong Bu can be carried out with above-mentioned steps S2, now detects the data obtained and can be used for regulating signal
The output of generator, thus overcome error, enables to stack the vibration signal that piezoelectric ceramics sends and reaches predetermined
Amplitude.
It addition, this step Tong Bu can also be carried out with above-mentioned steps S4, can by detected the data that obtain with
Standard value calculates, and obtains a scale factor, for the correction that data process and figure shows in later stage.
Such as, when be placed on reservoir model surface stack piezoelectric ceramics by different for frequency, driving voltage is identical
When the signal of telecommunication is respectively converted into vibration signal, owing to stacking piezoelectric ceramics to the conversion effect of different frequency signals not
With, the amplitude of the vibration signal of its output is the most different, and the reflected signal of reservoir model also can be different.If ignored
Such difference, carry out will result in error during Treatment Analysis after data acquisition, i.e. cannot know and receive
The size variation of the vibration signal of a certain frequency is to be decayed by reservoir model to be affected, or big by emission source output
Little cause.
And in the present embodiment, the data obtained in step S5 may be used for process and the explanation in later stage, it is thus possible to
Enough tell the real causes of the size variation of vibration signal.
While it is disclosed that embodiment as above, but described content is only to facilitate understand the present invention
And the embodiment used, it is not limited to the present invention.Technology people in any the technical field of the invention
Member, on the premise of without departing from spirit and scope disclosed in this invention, can be in the formal and details implemented
On make any amendment and change, but the scope of patent protection of the present invention, still must be with appending claims institute
Define in the range of standard.
Claims (10)
1. the detecting system of a saturated fluid reservoir model, it is characterised in that include reservoir model, fluid
Input equipment, sender unit and signal supervisory instrument；
Described fluid input device is for injecting fluid in described reservoir model；
Described sender unit is arranged at the surface of described reservoir model, and described sender unit is for stacking pressure
Electroceramics, for launching vibration signal to described reservoir model；
Described signal supervisory instrument for carrying out the reflection detection of vibration signal to the test point of described reservoir model.
Detecting system the most according to claim 1, it is characterised in that described in stack piezoelectric ceramics launch
The frequency range of vibration signal be 1kHz to 200kHz.
Detecting system the most according to claim 1, it is characterised in that the saturated flow of described reservoir model
Body thin layer is divided into the subregion that at least two is mutually isolated, and described fluid input device is injected to different subregions respectively
Water and oil.
Detecting system the most according to claim 1, it is characterised in that described reservoir model includes two-layer
Fragile material, and the saturated thin layer of fluid between described two-layer fragile material.
Detecting system the most according to claim 4, it is characterised in that described fragile material is asphalt mixtures modified by epoxy resin
Fat or lucite.
Detecting system the most according to claim 4, it is characterised in that described saturated thin layer of fluid is sand
Rock or imitative sandstone material.
Detecting system the most according to claim 1, it is characterised in that described in stack piezoelectric ceramics and include
If stacked dry tablet piezoelectric ceramics.
Detecting system the most according to claim 1, it is characterised in that described in stack the tight of piezoelectric ceramics
Paste the surface of described reservoir model and away from the surface of described reservoir model, it is possible to launch that amplitude is identical, phase simultaneously
The vibration signal that position is contrary.
Detecting system the most according to claim 8, it is characterised in that described signal supervisory instrument is also used
In the detection that the described surface away from described reservoir model stacking piezoelectric ceramics is carried out vibration signal.
Detecting system the most according to claim 1, it is characterised in that described signal supervisory instrument is for sweeping
Retouch formula laser vibration measurer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111812711A (en) * | 2020-07-20 | 2020-10-23 | 中国石油大学(北京) | Hydrate stratum seismic physical simulation test device and method based on reflection wave field |
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