CN102508300A - Earthquake underground fluid inspection well and system and method used earthquake underground fluid inspection well to detect seismic precursor abnormal information - Google Patents
Earthquake underground fluid inspection well and system and method used earthquake underground fluid inspection well to detect seismic precursor abnormal information Download PDFInfo
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Abstract
The invention discloses an earthquake underground fluid inspection well and a system and a method used the earthquake underground fluid inspection well to detect seismic precursor abnormal information of gap pressure diffusion coefficients, which relate to earth physics and quakeproof disaster reduction technology. The earthquake underground fluid inspection well is arranged vertical to the direction of strata, a corrosion resisting seal stainless steel sleeve is installed in the center of the inspection well in the middle, cement is used at the bottom and the top of the inspection well for fixing a sleeve, a stainless steel clamp is adopted to fix the sleeve at the position of the axial center of the stainless steel sleeve additionally, multimode fibers are buried in a gap between the sleeve and the well wall, ore particles are filled in the gap between the sleeve and the well wall, so that an even gap medium layer is formed. A special high-resolution-ratio fiber sensor collects gas pressure dynamic response signals stimulated by earthquake cutting waves, a data analyzing system is integrated through a maximum likelihood deconvolution space-time conservation method and a weight integral method chips, characteristic scale of the dynamic gap pressure diffusion coefficients related to the cutting waves is obtained through calculation, an earthquake source generated the earthquake cutting waves is carried out high-precision earthquake location, scientific decision-making data with earthquake source physical significances are provided to seismic prediction. The obtaining method of the characteristic scale of the dynamic gap pressure diffusion coefficients can be used for well wall fracture monitor of oil exploitation wells and carbon dioxide geology seal injection wells.
Description
Technical field
The present invention relates to geophysics and protection against and mitigation of earthquake disasters technical field; It is a kind of method of measuring the diffusing unusual multidate information of coefficient of earthquake precursors hole companding; Adopt fiber optic high-resolution dimension sensor; Gather the dynamic hole pressure data that earthquake shearing wave excites; The communication theory of pressing according to hole obtains the dynamic hole companding diffusing coefficient characteristics yardstick related with shearing wave with maximum likelihood deconvolution Space-Time Conservation Method; For earthquake prediction provides the parameter of the scientific decision with source physics meaning, major equipment is seismological observation well construction and infrared fibre-optic sensor, presses data analyzing system, dynamic loose coefficient maximum likelihood deconvolution Space-Time Conservation Method data analyzing system and based on the data handling system of weight integration transport function of hole companding based on the hole of Brillouin scattering time domain interpretive model measuring principle.
Background technology
China is the multiple country of earthquake disaster; Caused serious life and property loss; Obtain characteristic parameter with source physics meaning; Improve the science and the accuracy of earthquake prediction ability, good service " People's Republic of China's protection against and mitigation of earthquake disasters method " is had great national strategy safety and economic implications.
Crustal fluid is the most responsive to earthquake precursors; Forgive abundant source physics multidate information; Underground water table receives the influence of atmospheric precipitation, solid tide, crustal stress and earthquake shearing wave, and monitor earthquake underground water table ANOMALOUS VARIATIONS has become one of main path of domestic and international extraction earthquake precursors.
587 water levels of earthquake underground water table inspection well of China Seismology Bureau's registration are surveyed item; Earthquake underground water table determining instrument is installed promptly: digital observation instrument LN-3 type and analogue observation (drawing record) SW-40 type; The dynamic changing data of production wells water level judges according to artificial experience whether well water position ANOMALOUS VARIATIONS (hop, oscillatory occurences) is earthquake precursors.
The shearing wave that earthquake source produces excites hole to press ripple; Hole presses wave disturbance seismological observation well and its to belong to the fluidised form in water-bearing zone; Cause the well water position to change, the well water position changes the cycle that the hole that exists lag-effect, its time yardstick to surpass earthquake stimulation is pressed the ripple propagation; It is that attenuation is slow that hole is pressed the ripple propagation characteristic, and low frequency signals decay is fast.
Earthquake underground water table digital observation instrument LN-3 type adopts quartz pressure sensor, 1/60 hertz of SF, and receiver function adopts inspection well well water position to change the pressure differential of generation and the relation between the voltage; Through cable voltage signal is transferred to the terminal data disposal system; The well water position Dynamic Signal signal to noise ratio (S/N ratio) of monitoring is low, frequency band is narrow, jitter, and instrument drift is serious, is prone to smashed by thunder and lightning; Defectives such as sensor is subject to electromagnetic interference (EMI), the load that is short-circuited; Be difficult to obtain reliable earthquake precursors data, and manufacturing cost and operation cost height, significant limitation is arranged.Analogue observation (drawing record) SW-40 pattern is intended record and is used float-type transmitter, has the defective that sampling rate is low, noise is high.Traditional monitor well water level dynamic changing data is difficult to obtain the earthquake source physical message.
Therefore; Develop the method for the diffusing unusual multidate information of coefficient of earthquake precursors hole companding that a kind of signal to noise ratio (S/N ratio) is high, the space dynamic resolution is high, signal is sane; Obtaining the earthquake prediction parameter with source physics meaning, is the problem that more and more need face, urgently solve.
Summary of the invention
Technical matters to be solved by this invention provides a kind of loose method of the unusual multidate information of coefficient of signal to noise ratio (S/N ratio) height, space dynamic resolution are high, signal is sane earthquake precursors hole companding that obtains; A kind of earthquake underground fluid inspection well and a kind of system and method for measuring the diffusing unusual multidate information of coefficient of earthquake precursors hole companding based on this inspection well are provided for this reason; The hole that excites with space fiber optic high-resolution dimension sensor acquisition earthquake shearing wave presses the attitude response data, and obtains the technology of the diffusing coefficient characteristics yardstick of the dynamic hole companding related with shearing wave through maximum likelihood deconvolution Space-Time Conservation Method.Adopt fiber optic high-resolution dimension sensor; Gather the dynamic hole pressure data that earthquake shearing wave excites; The communication theory of pressing according to hole obtains the dynamic hole companding diffusing coefficient characteristics yardstick related with shearing wave with maximum likelihood deconvolution Space-Time Conservation Method; For earthquake prediction provides the parameter of the scientific decision with source physics meaning, major equipment is seismological observation well construction and infrared fibre-optic sensor, presses data analyzing system, dynamic loose coefficient maximum likelihood deconvolution Space-Time Conservation Method data analyzing system and based on the data handling system of weight integration transport function of hole companding based on the hole of Brillouin scattering time domain interpretive model measuring principle.
Technical solution of the present invention is:
A kind of earthquake underground fluid inspection well is provided, and this inspection well is perpendicular to direction of strata setting, and the observation well depth is confirmed according to the rock kind of inspection well position; The about 20-100 rice of the degree of depth, inspection well center have been installed corrosion-resistant sealing stainless steel sleeve pipe between two parties, adopt cement at inspection well bottom and top fixed sleeving; Form inspection well grout O-ring seal bottom and top layer; In the axial centre position of stainless steel sleeve pipe, adopt stainless steel to fasten sleeve pipe in addition, it is characterized in that; In the space between the sleeve pipe and the borehole wall; By 90 degree central angles at interval evenly embedding the multimode fibers of 4 transmission frequency bandwidths between 30 megahertzes to hundreds of megahertzes, this fiber optics is shape in the shape of a spiral, the bottom of 4 root multimode fibers dimension adopts corrosion-resistant cemented in the shaft bottom; Fill the even ore particles that diameter is about the 0.5-1 millimeter in the space between the sleeve pipe and the borehole wall, formed uniform pore media layer.
For described earthquake underground fluid inspection well, when inspection well was arranged in the saturated grouan of cranny development, the inspection well degree of depth was controlled at 20-50 rice.
For described earthquake underground fluid inspection well, when inspection well was arranged in the saturated sandstone of pores'growth, the inspection well degree of depth was controlled at 50-100 rice.
For described earthquake underground fluid inspection well, the distance between the sleeve pipe periphery and the inspection well borehole wall is 2-3 centimetre.
For described earthquake underground fluid inspection well, stainless steel sleeve pipe inside is full of air and airtight, the thickness 20-50 of inspection well grout O-ring seal bottom and top layer centimetre.
For described earthquake underground fluid inspection well, it is characterized in that the diameter 10-15 of inspection well wellhole centimetre.
For described earthquake underground fluid inspection well, it is characterized in that ore particles is quartz particles or sandstone particle.
The present invention also provides a kind of system that decides the diffusing unusual multidate information of coefficient of earthquake precursors hole companding based on the aforementioned observed well surveying; This system comprises multimode fiber, based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle with resolve integrated system, maximum likelihood deconvolution Space-Time Conservation Method data analyzing system, integrated data resolution system, wireless network signal transmission system and remote data control system based on weight integration method transport function; When the hole that excites when the earthquake shearing wave is pressed ripple through even saturated quartz or sandstone particle pore media layer; Hole presses the wave front of ripple to form the environmental stress of disturbance 4 root multimode fibers dimensions; Change light is propagated in the fiber optics phase place and intensity; And, obtain the Dynamic Signal that hole is pressed ripple based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle and the light phase or the intensity variation of parsing integrated system acquisition process fiber optics; This Dynamic Signal is delivered to maximum likelihood deconvolution Space-Time Conservation Method data analyzing system; This resolution system obtains the diffusing coefficient of dynamic hole companding that earthquake shearing wave produces; 4 time serieses that the diffusing coefficient of the dynamic hole companding of 4 root multimode fibers dimension constitutes are delivered to the integrated data processing system based on weight integration method delivery function, and this disposal system obtains the diffusing coefficient characteristics yardstick of the dynamic hole companding of reliable single earthquake inspection well; The diffusing coefficient characteristics yardstick of the dynamic hole companding of a plurality of earthquake underground fluid inspection wells is delivered to remote data control system by the wireless network signal transmission system.
The present invention also provides a kind of method of deciding the diffusing unusual multidate information of coefficient of earthquake precursors hole companding based on the aforementioned observed well surveying, comprises the steps:
A) probing earthquake underground fluid inspection well, the axle of inspection well is perpendicular to the direction of strata, when inspection well is arranged in the saturated grouan of cranny development; The inspection well degree of depth is controlled at 20-50 rice, and when inspection well was arranged in the saturated sandstone of pores'growth, the inspection well degree of depth was controlled at 50-100 rice; The diameter 10-15 of inspection well wellhole centimetre, after inspection well forms, clean inspection well; Corrosion-resistant sealing stainless steel sleeve pipe is installed in inspection well; Distance between the sleeve pipe periphery and the inspection well borehole wall is 2-3 centimetre, adopts the cemented sleeve pipe in the inspection well bottom, forms inspection well grout O-ring seal bottom; And, adopt stainless steel to fasten sleeve pipe in the axial centre position of stainless steel sleeve pipe;
B) according to the geographic orientation of inspection well; The multimode fiber of 4 transmission frequency bandwidths between 30 megahertzes to hundreds of megahertzes is embedded in the space between the sleeve pipe and the borehole wall by 90 degree central angles with spiral-shaped at interval, and the bottom of 4 root multimode fibers dimension adopts corrosion-resistant cemented in the shaft bottom;
C) adopting diameter is the even ore particles filling sleeve pipe of 0.5-1 millimeter and the space between the borehole wall, forms the even pore media layer of 2-3 centimetre of radial thickness;
D) adopt the cemented sleeve pipe at the inspection well top, form inspection well grout O-ring seal top layer;
When the hole that E) excites when the earthquake shearing wave is pressed ripple through even saturated ore particles pore media layer; Hole presses the wave front of ripple to form the environmental stress of disturbance 4 root multimode fibers dimensions; Change light is propagated in the multimode fiber phase place and intensity; And, obtain the Dynamic Signal that hole is pressed ripple based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle and the light phase or the intensity variation of resolution system acquisition process multimode fiber;
F) sane hole presses the attitude signal and is delivered to maximum likelihood deconvolution Space-Time Conservation Method data analyzing system; This resolution system obtains the diffusing coefficient of dynamic hole companding that earthquake shearing wave produces; 4 time serieses that the diffusing coefficient of the dynamic hole companding of 4 root multimode fibers dimension constitutes are delivered to the data analyzing system based on weight integration method sensing function, and this data analyzing system obtains the diffusing coefficient characteristics yardstick of the dynamic hole companding of reliable single earthquake inspection well;
G) the diffusing coefficient characteristics yardstick of the dynamic hole companding of a plurality of earthquake underground fluid inspection wells is delivered to remote data control system by the wireless network signal transmission system; Accomplish data acquisition and Flame Image Process; The diffusing coefficient characteristics yardstick of hole companding through at least three earthquake underground fluid inspection wells; The focus that produces earthquake shearing wave is carried out the high precision seismic location, for earthquake prediction provides the parameter of the scientific decision with source physics meaning.
A in this method) in the step, when the strain perpendicular to the direction of strata is higher than the strain that is parallel to the direction of strata, requires to measure the physical attribute of seismological observation well core, comprise shear resistance, factor of porosity and intrinsic infiltration coefficient.
A in this method) in the step, stainless steel sleeve pipe inside is full of air and airtight, the thickness 20-50 of inspection well grout O-ring seal bottom and top layer centimetre.
B in this method) in the step, the multimode fiber spatial resolution is 2 centimetres, measures precision ± 25 * 10-9 strain.
C in this method) in the step, ore particles is quartz particles or sandstone particle.
E in this method) in the step, the signal transfer function of the data analyzing system of said Brillouin scattering time domain interpretive model measuring principle is a Brillouin scattering time domain interpretive model.
F in this method) in the step, hole presses ripple to propagate based on the diffusing equation of non-linear two porous media hole companding.
G in this method) in the step, the diffusing coefficient characteristics yardstick of hole companding through at least three seismological observation wells carries out the high precision seismic location to the focus that produces earthquake shearing wave.
The present invention does not receive electromagnetic interference (EMI), no short circuit load, antinoise and signal sane; Keep spiral-shaped raising fiber optics hole to be pressed the induction sensitivity of ripple; Dynamic hole with 4 infrared fibre-optic sensors are measured is pressed the diffusing coefficient characteristics yardstick of data aggregate calibration hole companding, accurately discerns hole and presses direction of wave travel.And since evenly the pore media layer be saturated quartz particles pore media layer or saturated sandstone particle pore media layer, wherein saturated fluid is the shell fluid broadly, that improves that hole presses wave front has an effect spread area, strengthens hole and presses wave energy, guarantees that signal is sane.Have again; Maximum likelihood deconvolution Space-Time Conservation Method integrated data resolution system guarantees the single seismological observation well performance hole companding coefficient characteristics yardstick uniqueness of solution of loosing; Dynamically the diffusing coefficient characteristics yardstick of hole companding is only related with earthquake shearing wave, reaches zero noise pollution.More have, the coefficient characteristics yardstick that looses of the hole companding through at least three seismological observation wells carries out the high precision seismic location to the focus that produces earthquake shearing wave, to the scientific forecasting of earthquake decision-making foundation is provided, and does not appear in the newspapers as yet in the world.
Description of drawings
Fig. 1 is seismological observation well construction of the present invention and fiber optics scheme of installation.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the system schematic that the present invention is based on the diffusing unusual multidate information of coefficient of mensuration earthquake precursors hole companding of inspection well.
Fig. 4 is that the present invention measures the earthquake precursors hole companding dynamic hole that shearing wave that the Brillouin scattering time domain interpretive model of system and method for the unusual multidate information of coefficient obtains excites that looses and presses ripple.
Fig. 5 is that the present invention measures earthquake precursors hole companding dynamic hole companding that the maximum likelihood deconvolution Space-Time Conservation Method of system and method for the unusual multidate information of coefficient the obtains coefficient yardstick that looses that looses.
Among the figure: 1 is inspection well grout O-ring seal top layer; 2 is the pore media layer; 3 is corrosion-resistant sealing stainless steel sleeve pipe; 4 is the borehole wall; 5 is the stainless steel card; 6 is rock mass (grouan or sandstone); 7 multimode fibers; 8 inspection well grout O-ring seal bottoms; 11 is earthquake shearing wave; 12 is data acquisition and the resolution system based on Brillouin scattering time domain interpretive model measuring principle; 13 is maximum likelihood deconvolution Space-Time Conservation Method data analyzing system; 14 data analyzing systems based on weight integration method transport function; 15 is the wireless network signal transmission system; 16 is remote data control system.
Embodiment
Below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 method of the present invention is described.
As depicted in figs. 1 and 2, be the embodiment of a kind of earthquake underground fluid of the present invention inspection well, this inspection well is perpendicular to direction of strata setting, and the observation well depth is confirmed the about 20-100 rice of the degree of depth according to the rock kind of inspection well position.When inspection well was arranged in the saturated grouan of cranny development, the inspection well degree of depth was controlled at 20-50 rice; When inspection well was arranged in the saturated sandstone of pores'growth, the inspection well degree of depth was controlled at 50-100 rice.Corrosion-resistant sealing stainless steel sleeve pipe 3 has been installed at the inspection well center between two parties, and stainless steel sleeve pipe 3 inside are full of air and sealing, apart from inspection well bottom and top well head; Adopt cemented sleeve pipe 3; Form inspection well grout O-ring seal bottom 1 and top layer 8,, adopt stainless steel card 5 fixed sleevings 3 in the axial centre position of stainless steel sleeve pipe 3; In the space between the sleeve pipe 3 and the borehole wall 4; By 90 degree central angles at interval evenly embedding the multimode fibers 7 of 4 transmission frequency bandwidths between 30 megahertzes to hundreds of megahertzes, this fiber optics is shape in the shape of a spiral, the bottom of 4 root multimode fibers dimension 7 adopts corrosion-resistant cemented in the shaft bottom; And fill even quartz particles or the sandstone particle that diameter is about the 0.5-1 millimeter in the space between the sleeve pipe 3 and the borehole wall 4, formed saturated uniform quartz or sandstone particle pore media layer.Distance between sleeve pipe 3 peripheries and the inspection well borehole wall 4 is 2-3 centimetre.Inspection well grout O-ring seal bottom 1 and top layer 8 thickness 20-50 centimetre.
Fig. 3 is based on the loose system schematic of the unusual multidate information of coefficient of the mensuration earthquake precursors hole companding of above-mentioned inspection well, and this system comprises multimode fiber 7, based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle with resolve integrated system 12, maximum likelihood deconvolution Space-Time Conservation Method data analyzing system 13, integrated data resolution system 14, wireless network signal transmission system 15 and remote data control system 16 based on weight integration method transport function; At first by data acquisition and parsing integrated system 12 emitting incident light in multimode fiber 7 based on Brillouin scattering time domain interpretive model measuring principle; (said fluid is the broad sense fluid in the earth's crust through saturated fluid when stress wave that earthquake shearing wave 11 excites; Be liquid; Gas, perhaps fluid-mixing phase) quartz or sandstone particle pore media layer time, the wave front of stress wave has formed the environmental stress of disturbance 4 root multimode fibers dimensions; Cause the fiber optics distortion; Change light is propagated in the fiber optics phase place and intensity, form reflection wave, and based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle and the light phase and the intensity variation of resolving the reflection wave that the distortion of integrated system 12 acquisition process fiber optics causes; And utilize Brillouin scattering time solution analysis method; Calculate in the fiber optics strain or the stress value of every fiber optics at a distance from 2 centimetres, obtain stress wave that earthquake shearing wave 11 excites through the quartz of saturated fluid or the dynamic strain or the stress signal of sandstone particle pore media layer, this dynamic strain or stress are made up of two parts; The stress wave that first earthquake shearing wave 11 excites causes the corresponding strain or the stress of distortion of quartz in quartz or the sandstone particle pore media layer or sandstone granular solids; It two is that stress wave that earthquake shearing wave 11 excites causes the quartz of saturated fluid or the variation that press sandstone particle pore media layer mesoporosity, adopts classical Morlet wavelet basis function, utilizes the second order method of wavelet analysis; Extract strain or stress data that low-pass signal obtains said quartz or sandstone granular solids; Extract high communication number and obtain the delta data that said hole is pressed, the delta data that said hole is pressed is that dynamic hole is pressed, and it is consistent that this dynamic hole presses the hole that in the rock mass at said inspection well place, excites with earthquake shearing wave to press; This dynamic hole presses signal to be delivered to maximum likelihood deconvolution Space-Time Conservation Method data analyzing system 13; It is the nonlinear function of the diffusing coefficient of hole companding that this dynamic hole is pressed; The diffusing coefficient of hole companding is the characteristic physics property parameters of rock mass; It is an indirect problem that the present invention presses the process of calculating the diffusing coefficient of hole companding through dynamic hole; Adopt the diffusing theoretical equation of classical non-linear hole companding; And adopt the discrete said nonlinear equation of high precision Space-Time Conservation unit/scholar who won the first place in provincial imperial examinations method, and adopt classical maximum likelihood The Method of Deconvolution to calculate the diffusing coefficient of hole companding, affiliated earthquake shearing wave is a time series; This resolution system obtains the diffusing coefficient of dynamic hole companding that earthquake shearing wave produces; 4 time serieses of the diffusing coefficient formation of the dynamic hole companding that 4 root multimode fibers are tieed up are delivered to the integrated data processing system 14 based on weight integration method delivery function, and the classical weight integration method of this disposal system employing is carried out weighted mean to 4 time serieses of the diffusing coefficient formation of described dynamic hole companding, obtain the diffusing coefficient of the dynamic hole companding of reliable single earthquake inspection well (being also referred to as the diffusing coefficient characteristics yardstick of hole companding); The diffusing coefficient characteristics yardstick of the dynamic hole companding of a plurality of earthquake underground fluid inspection wells is delivered to remote data control system 16 by wireless network signal transmission system 15; This data management system can adopt classical method of earthquake locating; Like Cross Location Method etc.; Utilize dynamic hole companding to loose the coefficient characteristics yardstick, particularly have the small earthquake location of earthquake precursors meaning earthquake.
On the basis of aforementioned observed well and system, realized measuring the method for the diffusing unusual multidate information of coefficient of earthquake precursors hole companding, comprise the steps:
A) probing earthquake underground fluid inspection well, the axle of inspection well is perpendicular to the direction of strata, when inspection well is arranged in the saturated grouan of cranny development; The inspection well degree of depth is controlled at 20-50 rice, and when inspection well was arranged in the saturated sandstone of pores'growth, the inspection well degree of depth was controlled at 50-100 rice; The diameter 10-15 of inspection well wellhole centimetre, after inspection well forms, clean inspection well; Corrosion-resistant sealing stainless steel sleeve pipe 3 is installed in inspection well; Distance between sleeve pipe 3 peripheries and the inspection well borehole wall 4 is 2-3 centimetre, is adopting the cemented sleeve pipe apart from the inspection well bottom, forms inspection well grout O-ring seal bottom 1; And, adopt stainless steel card 5 fixed sleevings 3 in the axial centre position of stainless steel sleeve pipe;
B) according to the geographic orientation of inspection well; The multimode fiber 7 of 4 transmission frequency bandwidths between 30 megahertzes to hundreds of megahertzes is embedded in the space between the sleeve pipe 3 and the borehole wall 4 by 90 degree central angles with spiral-shaped at interval, and the bottom of 4 root multimode fibers dimension 7 adopts corrosion-resistant cemented in the shaft bottom;
C) adopting diameter is the even ore particles filling sleeve pipe 3 of 0.5-1 millimeter and the space between the borehole wall 4, forms the even pore media layer 2 of 2-3 centimetre of radial thickness;
D) adopt cemented sleeve pipe 3 apart from the inspection well open top, forming inspection well grout O-ring seal top layer 8;
When the hole that E) excites when the earthquake shearing wave is pressed ripple through even saturated ore particles pore media layer 2; Hole presses the wave front of ripple to form the environmental stress of disturbance 4 root multimode fibers dimensions; Change light is propagated in the multimode fiber phase place and intensity; And, obtain the Dynamic Signal that hole is pressed ripple based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle and the light phase or the intensity variation of resolution system 12 acquisition process multimode fibers;
F) sane hole presses the attitude signal and is delivered to maximum likelihood deconvolution Space-Time Conservation Method data analyzing system 13; This resolution system obtains the diffusing coefficient of dynamic hole companding that earthquake shearing wave produces; 4 time serieses that the diffusing coefficient of the dynamic hole companding of 4 root multimode fibers dimension constitutes are delivered to the data analyzing system 14 based on weight integration method sensing function, and this data analyzing system obtains the diffusing coefficient characteristics yardstick of the dynamic hole companding of reliable single earthquake inspection well;
G) the diffusing coefficient characteristics yardstick of the dynamic hole companding of a plurality of earthquake underground fluid inspection wells is delivered to remote data control system 16 by wireless network signal transmission system 15; Accomplish data acquisition and Flame Image Process; The diffusing coefficient characteristics yardstick of hole companding through at least three earthquake underground fluid inspection wells; The focus that produces earthquake shearing wave is carried out the high precision seismic location, for earthquake prediction provides the parameter of the scientific decision with source physics meaning.
A in this method) in the step, when the strain perpendicular to the direction of strata is higher than the strain that is parallel to the direction of strata, requires to measure the physical attribute of seismological observation well core, comprise shear resistance, factor of porosity and intrinsic infiltration coefficient.
A in this method) in the step, stainless steel sleeve pipe inside is full of air and airtight, the thickness 20-50 of inspection well grout O-ring seal bottom and top layer centimetre.
B in this method) in the step; The multimode fiber spatial resolution is 2 centimetres; Measure precision ± 25 * 10-9 strain, in fact the used multimode fiber of the present invention is exactly a kind of infrared fibre-optic sensor, and this resolution is meant on the multimode fiber and is spaced apart 2 centimetres between numerous sensors.
C in this method) in the step, ore particles is quartz particles or sandstone particle.
E in this method) in the step, the signal transfer function of the data analyzing system of said Brillouin scattering time domain interpretive model measuring principle is a Brillouin scattering time domain interpretive model.
F in this method) in the step, hole presses ripple to propagate based on the diffusing equation of non-linear two porous media hole companding.
And the present invention is embedded in 4 root multimode fibers dimension sensor the quartz or the sandstone particle pore media layer of saturated broad sense crustal fluid with spiral shell suspension type shape; Signal is sane, energy loss is minimum, is to gather the novelty technology path that the earthquake precursors hole is pressed unusual Dynamic Signal.
And the high resolving power that the present invention excites through multimode fiber sensor acquisition shearing wave, sane dynamic hole are pressed signal; Adopt maximum likelihood deconvolution Space-Time Conservation Method and weight integration method; Calculate the diffusing coefficient characteristics yardstick of seismological observation well performance hole companding; And the diffusing coefficient characteristics yardstick of the dynamic hole companding that utilizes at least 3 seismological observation wells; The focus that produces earthquake shearing wave is carried out the high precision seismic location, for earthquake prediction provides the foundation of the scientific decision with source physics meaning, is the novelty technology path of earthquake physical forecasting.
The present invention comprises following priority flow process: the dynamic hole that at first utilizes in the multimode fiber 7 shearing wave 11 of the sensor acquisition earthquake that exists to excite is pressed light is propagated in the multimode fiber that causes the phase place and the variation of intensity; The variable signal of phase place and intensity carries out data parsing in based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle and resolution system 12; Obtain the dynamic hole of sane high resolving power and press signal (as shown in Figure 4); In the data analyzing system 14 of maximum likelihood deconvolution Space-Time Conservation Method data analyzing system 13 and weight integration method sensing function; Calculate the diffusing coefficient characteristics yardstick (as shown in Figure 5) of seismological observation well performance hole companding; Wireless network signal transmission system 15 passes to remote data control system 16 with the diffusing coefficient characteristics yardstick of dynamic hole companding; Carry out the high precision seismic location, scientific basis is provided for judging the short three elements (time, place, earthquake magnitude) that face violent earthquake.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the instructions just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.
Claims (15)
1. earthquake underground fluid inspection well, this inspection well are perpendicular to direction of strata setting, and the observation well depth is confirmed according to the rock kind of inspection well position; The about 20-100 rice of the degree of depth, inspection well center have been installed corrosion-resistant sealing stainless steel sleeve pipe between two parties, adopt cement to fix said sleeve pipe in inspection well bottom and top; Form inspection well grout O-ring seal bottom and top layer; In the axial centre position of stainless steel sleeve pipe, adopt stainless steel to fasten sleeve pipe in addition, it is characterized in that; In the space between the sleeve pipe and the borehole wall; By 90 degree central angles at interval evenly embedding the multimode fibers of 4 transmission frequency bandwidths between 30 megahertzes to hundreds of megahertzes, this fiber optics is shape in the shape of a spiral, the bottom of 4 root multimode fibers dimension adopts corrosion-resistant cemented in the shaft bottom; Fill the even ore particles that diameter is about the 0.5-1 millimeter in the space between the sleeve pipe and the borehole wall, formed uniform pore media layer.
2. earthquake underground fluid inspection well according to claim 1 is characterized in that when inspection well was arranged in the saturated grouan of cranny development, the inspection well degree of depth was controlled at 20-50 rice.
3. earthquake underground fluid inspection well according to claim 1 is characterized in that when inspection well was arranged in the saturated sandstone of pores'growth, the inspection well degree of depth was controlled at 50-100 rice.
4. earthquake underground fluid inspection well according to claim 1 is characterized in that the distance between the sleeve pipe periphery and the inspection well borehole wall is 2-3 centimetre.
5. earthquake underground fluid inspection well according to claim 1 is characterized in that, stainless steel sleeve pipe inside is full of air and airtight, the thickness 20-50 of inspection well grout O-ring seal bottom and top layer centimetre.
6. earthquake underground fluid inspection well according to claim 1 is characterized in that, the diameter 10-15 of inspection well wellhole centimetre.
7. earthquake underground fluid inspection well according to claim 1 is characterized in that, ore particles is quartz particles or sandstone particle.
8. the arbitrary described inspection well based on claim 1-7 is measured the loose system of the unusual multidate information of coefficient of earthquake precursors hole companding; This system comprises multimode fiber, based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle and resolution system, maximum likelihood deconvolution Space-Time Conservation Method data analyzing system, data analyzing system, wireless network signal transmission system and remote data control system based on weight integration method transport function; When the hole that excites when the earthquake shearing wave is pressed ripple through even saturated ore particles pore media layer; Hole presses the wave front of ripple to form the environmental stress of disturbance 4 root multimode fibers dimensions; Change light is propagated in the fiber optics phase place and intensity; And, obtain the Dynamic Signal that hole is pressed ripple based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle and the light phase or the intensity variation of resolution system acquisition process fiber optics; This Dynamic Signal is delivered to maximum likelihood deconvolution Space-Time Conservation Method data analyzing system; This resolution system obtains the diffusing coefficient of dynamic hole companding that earthquake shearing wave produces; 4 time serieses that the diffusing coefficient of the dynamic hole companding of 4 root multimode fibers dimension constitutes are delivered to the data analyzing system based on weight integration method delivery function, and this data analyzing system obtains the diffusing coefficient characteristics yardstick of the dynamic hole companding of reliable single earthquake inspection well; The diffusing coefficient characteristics yardstick of the dynamic hole companding of a plurality of earthquake underground fluid inspection wells is delivered to remote data control system by the wireless network signal transmission system.
9. a method of measuring the diffusing unusual multidate information of coefficient of earthquake precursors hole companding comprises the steps:
A) probing earthquake underground fluid inspection well, the axle of inspection well is perpendicular to the direction of strata, when inspection well is arranged in the saturated grouan of cranny development; The inspection well degree of depth is controlled at 20-50 rice, and when inspection well was arranged in the saturated sandstone of pores'growth, the inspection well degree of depth was controlled at 50-100 rice; The diameter 10-15 of inspection well wellhole centimetre, after inspection well forms, clean inspection well; Corrosion-resistant sealing stainless steel sleeve pipe is installed in inspection well; Distance between the sleeve pipe periphery and the inspection well borehole wall is 2-3 centimetre, adopts cement fixed sleeving bottom inspection well, forms inspection well grout O-ring seal bottom; And, adopt stainless steel to fasten sleeve pipe in the axial centre position of stainless steel sleeve pipe;
B) according to the geographic orientation of inspection well; The multimode fiber of 4 transmission frequency bandwidths between 30 megahertzes to hundreds of megahertzes is embedded in the space between the sleeve pipe and the borehole wall by 90 degree central angles with spiral-shaped at interval, and the bottom of 4 root multimode fibers dimension adopts corrosion-resistant cemented in the shaft bottom;
C) adopting diameter is the even ore particles filling sleeve pipe of 0.5-1 millimeter and the space between the borehole wall, forms the uniform pore media layer of 2-3 centimetre of radial thickness;
D) adopt the cemented sleeve pipe at the inspection well top, form inspection well grout O-ring seal top layer;
When the hole that E) excites when the earthquake shearing wave is pressed ripple through even saturated ore particles pore media layer; Hole presses the wave front of ripple to form the environmental stress of disturbance 4 root multimode fibers dimensions; Change light is propagated in the multimode fiber phase place and intensity; And, obtain the Dynamic Signal that hole is pressed ripple based on the data acquisition of Brillouin scattering time domain interpretive model measuring principle and the light phase or the intensity variation of resolution system acquisition process multimode fiber;
F) sane hole presses the attitude signal and is delivered to maximum likelihood deconvolution Space-Time Conservation Method data analyzing system; This resolution system obtains the diffusing coefficient of dynamic hole companding that earthquake shearing wave produces; 4 time serieses that the diffusing coefficient of the dynamic hole companding of 4 root multimode fibers dimension constitutes are delivered to the data analyzing system based on weight integration method sensing function, and this data analyzing system obtains the diffusing coefficient characteristics yardstick of the dynamic hole companding of reliable single earthquake inspection well;
G) the diffusing coefficient characteristics yardstick of the dynamic hole companding of a plurality of earthquake underground fluid inspection wells is delivered to remote data control system by the wireless network signal transmission system; Accomplish data acquisition and Flame Image Process; The diffusing coefficient characteristics yardstick of hole companding through at least three earthquake underground fluid inspection wells carries out the high precision seismic location to the focus that produces earthquake shearing wave.
10. the method for measuring the diffusing unusual multidate information of coefficient of earthquake precursors hole companding based on fiber optics according to claim 1; Its said A) in the step; When the strain perpendicular to the direction of strata is higher than the strain that is parallel to the direction of strata; Require to measure the physical attribute of seismological observation well core, comprise shear resistance, factor of porosity and intrinsic infiltration coefficient.
11. the method for measuring the diffusing unusual multidate information of coefficient of earthquake precursors hole companding based on fiber optics according to claim 1; Its said A) in the step; Stainless steel sleeve pipe inside is full of air and airtight, the thickness 20-50 of inspection well grout O-ring seal bottom and top layer centimetre.
12. according to claim 1ly measure the loose method of the unusual multidate information of coefficient of earthquake precursors hole companding, its said B based on fiber optics) in the step, the multimode fiber spatial resolution is 2-3 centimetre, measures precision ± 25 * 10
-9Strain.
13. according to claim 1ly measure the loose method of the unusual multidate information of coefficient of earthquake precursors hole companding, its said C based on fiber optics) in the step, ore particles is quartz particles or sandstone particle.
14. according to claim 1ly measure the loose method of the unusual multidate information of coefficient of earthquake precursors hole companding, its said E based on fiber optics) in the step, said transport function is a Brillouin scattering time domain interpretive model.
15. according to claim 1ly measure the loose method of the unusual multidate information of coefficient of earthquake precursors hole companding, its said F based on fiber optics) in the step, hole presses ripple to propagate based on the non-linear two porous media hole companding equation that looses.
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| CN105092972A (en) * | 2014-05-06 | 2015-11-25 | 郑州晶微电子科技有限公司 | Hydropower monitoring instrument |
| CN110412646A (en) * | 2018-04-27 | 2019-11-05 | 曾玉婷 | A kind of seismic precursor parameter acquiring method and prediction about imminent earthquakes method |
| CN112632203A (en) * | 2020-12-21 | 2021-04-09 | 武汉达梦数据技术有限公司 | Geological disaster monitoring point searching method and device |
| CN112859945A (en) * | 2021-01-15 | 2021-05-28 | 四川大学 | Calibration platform hole pressure control system and control method thereof |
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| CN202330734U (en) * | 2011-10-28 | 2012-07-11 | 中国地震局地壳应力研究所 | Underground fluid inspection well for earthquake |
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| WO1999046615A1 (en) * | 1998-03-11 | 1999-09-16 | Paulsson Geophysical Services, Inc. | Clamped receiver array using coiled tubing conveyed packer elements |
| US20050173111A1 (en) * | 2003-03-14 | 2005-08-11 | Bostick Francis X.Iii | Permanently installed in-well fiber optic accelerometer-based seismic sensing apparatus and associated method |
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| CN105092972A (en) * | 2014-05-06 | 2015-11-25 | 郑州晶微电子科技有限公司 | Hydropower monitoring instrument |
| CN110412646A (en) * | 2018-04-27 | 2019-11-05 | 曾玉婷 | A kind of seismic precursor parameter acquiring method and prediction about imminent earthquakes method |
| CN110412646B (en) * | 2018-04-27 | 2024-02-23 | 曾玉婷 | Earthquake precursor parameter acquisition method and earthquake prediction method |
| CN112632203A (en) * | 2020-12-21 | 2021-04-09 | 武汉达梦数据技术有限公司 | Geological disaster monitoring point searching method and device |
| CN112632203B (en) * | 2020-12-21 | 2021-12-14 | 武汉达梦数据技术有限公司 | Geological disaster monitoring point searching method and device |
| CN112859945A (en) * | 2021-01-15 | 2021-05-28 | 四川大学 | Calibration platform hole pressure control system and control method thereof |
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