CN107515430B - A kind of method of seismic wave method detection salt lake bittern - Google Patents
A kind of method of seismic wave method detection salt lake bittern Download PDFInfo
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
- G01V1/306—Analysis for determining physical properties of the subsurface, e.g. impedance, porosity or attenuation profiles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/14—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electron or nuclear magnetic resonance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V7/00—Measuring gravitational fields or waves; Gravimetric prospecting or detecting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/61—Analysis by combining or comparing a seismic data set with other data
- G01V2210/616—Data from specific type of measurement
- G01V2210/6169—Data from specific type of measurement using well-logging
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Abstract
A kind of method of seismic wave method detection salt lake bittern, form, subsiding center including the area that analyzes and researches, it is reconnoitred in range in selected, judge the geological structure and distribution of mineral deposits situation of workspace, the fracture in research area is divided, hydrous fluids will be determined using magnetic nuclear resonance method, determine exploitation well location, the step of determining rich water point is verified using hydrogeologic drilling, it can be realized and infer watery region, determine exploitation well location, determining rich water point is verified using hydrogeologic drilling, water yield is big, and water quality is good.
Description
Technical field
The present invention relates to field of detecting, and in particular to a kind of method of seismic wave method detection salt lake bittern.
Background technique
Pressure bittern water-bearing layer is the main seam of Ma Haiyanhu, and KCl stock number accounts for the 95% of total resources.It is opened for important
Target is adopted, but previous exploration data shows that mining area pressure bittern water-bearing layer, watery is poor, exploitation difficulty is big.It is badly in need of selection pressure-bearing
The water abundant ground progress mining phase exploration relevant to workability in water-bearing layer is reconnoitred and experimental study.In this case,
It is necessary to carry out following work: first is that the pressure-bearing for being considered as depocenter but previous hydrogeological investigation Comparision weakness
The watery in water-bearing layer is detected by completely new exploration technology, and mineability is determined by special test, so as to
Pressure bittern exploitation is put on the agenda；Second is that placing hope on the inhomogeneity of saline minerals deposition compaction rate, salt can be made
The permeance property of layer tries to find out these permeance properties and richness by completely new exploration technology there may be corresponding inhomogeneity
The aqueous relatively good section of energy is exploited.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide it is a kind of can watery to artesian aquifer and
Mineability is detected and is tested, and combines conventional hydrogeological test to be answered using modern completely new scientific exploration technology
Core finds rich water section, can be realized and infers watery region, exploitation well location is determined, using hydrogeologic drilling to determining
Rich water point is verified, and water yield is big, the method for the good seismic wave method detection salt lake bittern of water quality.
The present invention provides a kind of method of seismic wave method detection salt lake bittern, in turn includes the following steps:
(1) using the form in high-precision gravity and magnetic technology analysis and research area, subsiding center；
(2) it is reconnoitred in range in selected, basin basement feature is measured according to different lithology density of earth formations nature difference,
Judge the geological structure and distribution of mineral deposits situation of workspace, wherein according to gravity anomaly form, horizontal first derivative extreme point and
Vertical first derivative zero point position divides the fracture in research area in conjunction with Euler deconvolution；
(3) it combines seismic prospecting to judge bottom rift structure, specially utilizes magnetic nuclear resonance method by NMR signal
It is construed to the geometric parameter in hydrogeological parameter and water-bearing layer, determines depth, thickness and the unit volume water content in water-bearing layer,
And the information and prediction water yield of water-bearing layer mean permeability are provided, it determines hydrous fluids, determines exploitation well location；
(4) determining rich water point is verified using hydrogeologic drilling, is specially drawn water examination using single hole stationary flow
It tests, point three examination sections respectively draw water to the Ith pressure bittern layer, the IIth pressure bittern layer and the IIIth pressure bittern layer, wherein
Water level decreasing process observation data, utilize Dupit formula calculation permeability coefficient and the radius of influence:
For pressure-bearing whole well:
K-AQUIFER HYDRAULIC in formula, unit m/d；
Q-draws water well yield, unit m3/d；
SWDrawdown in-pumped well, unit m；
M-artesian aquifer thickness, unit m；
R-the radius of influence, unit m；
rW- pumped well radius, unit m.
Wherein, the geological structure for judging workspace includes judging anticline, fracture, salt dome local structural features.
Wherein, the step (2) specifically:
1) construction early-stage preparations, are carried out, complete static test, dynamic test, Consistency test, scale factor calibration in fact
It tests；
2) gravity base point, is set up, work area gravity base point is set in the courtyard wall of guard station, if relatively heavy force value is 0；
3), acquisition gravimetric data acquisition, wherein the gravimetric data of measuring point uses single range observation method, each working cell head and the tail
Basic point is connected, the same day is closed basic point, and work is observed all on basic point by basic point~auxiliary magnet~basic point order before starting,
Whether normal operating conditions is in inspection apparatus.
Wherein, drill footage is 150.78m in the step (4), and complete opening coring, field formation lithology edits and records layering 277
Layer, desk research merge into 91 layers, count the thickness of different lithology and carry out complete opening accumulation.
The method of seismic wave method detection salt lake bittern of the invention, may be implemented:
1) horse sea salt lake basin shape, subsiding center are analyzed using high-precision gravity and magnetic technology, sentenced in conjunction with seismic prospecting
Disconnected stratum breaking construction, arranges that the determination of ground nuclear magnetic resonance sensing point can exploit point on structural belt, finally by the hydrology
Matter drilling verification can exploit watery a little.I.e. by the way that " high-precision gravity+seismic prospecting+ground nuclear magnetic resonance+hydrogeology is bored
The method of spy " reconnoitres salt lake pressure bittern, can be realized and infers watery region, determines exploitation well location, utilizes the hydrology
Geological drilling verifies determining rich water point, and water yield is big, and water quality is good.
2) according to salt lake bittern occurrence characteristics, range is reconnoitred using remote sensing structure analysis determination, reconnoitres range in selected
It is interior, using EH4 Detection Techniques, stratum fissure zone is drawn a circle to approve, infers watery region, exploitation well location is determined, is bored using hydrogeology
Determining rich water point is verified in spy.
Detailed description of the invention
Fig. 1 is actual measurement bouguer gravity anomaly isogram
Fig. 2 is substrate inversion result figure
Fig. 3 is that fracture divides waveform diagram
Fig. 4 (a) is that SNMR inversion method explains water content histogram
Fig. 4 (b) is that SNMR inversion method explains T1* with depth change curve
Fig. 4 (c) is that SNMR inversion method explains permeability with depth change curve
Fig. 5 is horse sea potassium mining area ground nuclear magnetic resonance method 51m depth unit volumetric(al) moisture content plane equivalence
Fig. 6 is horse sea potassium mining area ground nuclear magnetic resonance method 51m depth T1 plane equivalence
Fig. 7 (a) is experiment opening sampling site (T1 point) inversion interpretation water content histogram
Fig. 7 (b) is experiment opening sampling site (T1 point) inversion interpretation T1* with depth change curve
Fig. 7 (c) is experiment opening sampling site (T1 point) inversion interpretation permeability with depth change curve
Fig. 8 is the first examination section Q-S relation curve, q-S relation curve and Q ﹑ S-t duration curve
Fig. 9 is the second examination section Q-S relation curve, q-S relation curve and Q ﹑ S-t duration curve
Figure 10 is that third tries section Q-S relation curve, q-S relation curve and Q ﹑ S-t duration curve
Specific embodiment
The following detailed description of specific implementation of the invention, it is necessary to it is indicated herein to be, implement to be only intended to this hair below
Bright further explanation, should not be understood as limiting the scope of the invention, and field person skilled in the art is according to above-mentioned
Some nonessential modifications and adaptations that summary of the invention makes the present invention, still fall within protection scope of the present invention.
The workability in horse sea salt lake pressure bittern water-bearing layer needs to carry out the special Hydrogeological Work of mining phase, it may be assumed that
First, the watery and mineability of artesian aquifer are detected and tested；Second, using modern completely new scientific exploration
Technology combines conventional hydrogeological test to be checked, and finds rich water section.
One, high-precision gravity
1. gravimetric prospecting Method And Principle
Any object of earth surface is caused all by the effect of terrestrial gravitation by the gravitation of the earth and earth rotation
Centrifugal inertial force resultant force effect.The gravity of earth surface changes with place.The variation and subsurface material density of gravity
It is unevenly distributed related；And the distribution of material density has close ties with geological structure and distribution of mineral deposits.Therefore, Study of The Underground
Material density is unevenly distributed caused Gravity changer (referred to as gravity anomaly), it will be appreciated that and infer the structure of the earth, the earth's crust
Construction, and exploration mineral resources etc..
For gravity methods based on the law of universal gravitation, measurement has the geologic body of density variation to cause around it with country rock
Gravity anomaly, geology and other Use of Geophysical Data in conjunction with workspace carries out qualitative interpretation and quantitative interpretation to gravity anomaly, with
Position ﹑ scale and shape between sky existing for these geologic bodies are determined, to judge the geological structure and distribution of mineral deposits feelings of workspace
A kind of geophysical exploration method of condition.
Gravitational method measures basin basement feature, controlled fracturing blasting construction according to different lithology density of earth formations nature difference.Weight
Force method advantage is the control of geology background, and face resolution capability is high.
Gravimetric prospecting solves following task: the local structures such as research work area geological structure, including anticline, fracture, salt dome
Feature；Research work area coat properties.
2. gravimetric prospecting working method
1), construction early-stage preparations
Preparation before construction includes: static test, dynamic test, Consistency test, scale factor calibration.Through testing, respectively
Kind index meets related specifications
2), gravity base point is set up
Work area gravity base point is arranged in the courtyard wall of guard station, plane coordinates: X=4240193.865, Y=601318.033, H
=2743.178.If its relatively heavy force value is 0.
3), gravimetric data acquires
(1) gravity profile point in work area is away from for 100m.
(2) during field work, when measuring point is laid as far as possible selection landform is flat, the near region influence of topography lesserly
Side, when field work, each measuring point was marked with red spray painting, and class's report records surrounding geological information in detail.
(3) gravimetric observation of measuring point uses single range observation method, each working cell head and the tail connection basic point, and the same day is closed base
Point.Closing time is 9.0289~12.1111 hours, and mis-tie misclosure is 0.015~0.109.
(4) field work is observed all on basic point by basic point~auxiliary magnet~basic point order before starting daily, with
Whether inspection apparatus is in normal operating conditions.
3. gravimetric prospecting result
According to design requirement, in conjunction with reconnaissance trip, gravimetric prospecting, which amounts to, lays three sections, and 30 ° of profile azimuth.Main profile
MHZL-1 crosses K1#, and MHZL-2, MHZL-3 are located at the about 2km of main profile both sides.Measuring point totally 119, survey line overall length
18000m.Specific works amount is referring to table 1.
| Serial number | Survey line number | Physical points (a) | Point is away from (m) | Survey line length (m) |
| 1 | MHZL-1 | 101 | 100 | 10000 |
| 2 | MHZL-2 | 9 | 500 | 4000 |
| 3 | MHZL-3 | 9 | 500 | 4000 |
| It is total | 119 | 18000 |
1 gravimetric prospecting material object Workload Account table of table
1), bouguer gravity anomaly
Each measuring point observation obtains bouguer gravity anomaly value, bouguer gravity anomaly isopleth ginseng after above-mentioned every correction
See Fig. 1.It can be obtained by Bouguer map, the bouguer gravity anomaly variation range in work area is 0.02179~1.1968.
Gravimetric prospecting arranges three sections in survey area, has obtained research area substrate shape by bouguer gravity anomaly distribution map
State, main body substantially northeast, southwest is high, intermediate low recess；Inheritance between upper and lower level is fine, the steeper lower layer in upper layer compared with
It is slow.
2), substrate inverting
For the rolling shape of inverting bottom interface, classical Parker-Oldenburg Interface Inversion algorithm is utilized.1974
Year, Oldenburg proposes a kind of iteration Inversion of Interface on the basis of the forward modeling of the interface park.Master is cutd open using this method
Face carries out inverting, as a result sees Fig. 2.When substrate interface is deeper, the exceptional value generated is smaller；When substrate interface depth is shallower,
The GRAVITY ANOMALIES of generation is larger.Corresponding relationship between each gravity value and its depth value is relatively good.
According to gravity anomaly form, horizontal first derivative extreme point and vertical first derivative zero point position, in conjunction with Europe
It draws deconvolution (structural index takes zero), the fracture in research area is divided.According to above-mentioned algorithm, 6 fractures are marked off, as a result
As shown in Figure 3.
Two, ground nuclear magnetic resonance
1. magnetic nuclear resonance method principle
Nuclear magnetic resonance technique is a kind of geophysics water detection technology, the proton (matter in nuclear magnetic resonance theory, in hydrone
Son) the specific frequency current impulse that is sent in earth's surface coil excited, Larmor precession, precession are generated in earth's magnetic field
Frequency is peculiar for proton.The NMR signal generated to the excitation pulse of different-energy measures analysis, obtains difference
The water content and pore size on depth stratum.The amplitude of NMR signal is directly related with water content, i.e. water content in stratum
More, NMR signal response is stronger.Die-away time is related with pore size, i.e., damping time constant is bigger, shows waterstone
Porosity it is bigger.
Magnetic nuclear resonance method feature:
1, MRS water detector is the geophysics novel technical method of current direct look for water unique in the world, and explaining has only
One property.
2, inversion interpretation has the characteristics that quantization, informative.
NMR signal can be construed to the geometric parameter in certain hydrogeological parameters and water-bearing layer by magnetic nuclear resonance method.
Within the scope of the investigation depth of method, depth, thickness, the unit volume in water-bearing layer can be determined with quantitative explanation results
Water content, and can provide the information and prediction water yield of water-bearing layer mean permeability.
3, nuclear magnetic resonance method investigation depth is generally less than 150m, and the influence vulnerable to the interference of mining area electric power.
2. nuclear magnetic resonance working method
IRIS company, data acquisition instrument equipment choosing France NMR system (NUMIS POLY), the system are output
Power is high, receiving sensitivity is high and by the instrument of state-of-the-art direct detection underground water in the world today of PC machine control.NUMIS
POLY system by DC power supply (2 pieces of automobile storage battery), DC/DC converter, transmitter, transmit/receive antenna, tuned cell, connect
Receipts machine, external computer and part auxiliary wiring are constituted.
It is " " type, side length 150m that coil shape is laid when in rotating detection process.Measurement range 5000-68000nV, record
Length 240ms, pulse duration 40ms, interpulse period 20-40ms, pulse square number be 16, stacking fold
32-64 times.The stacking fold of each measuring point is determined according to work area electromagnetic noise size.
3. nuclear magnetic resonance explores result
Nuclear magnetic resonance method work arrangement is using, as axis, south extends 55km, area about 55km at former seismic survey tomography2's
Intercrystalline bittern water-bearing layer region, with 500m × 500m be layout spacing carry out pressure bittern water-bearing layer workability nuclear magnetic resonance visit
It looks into.
Fig. 4 provides 08 survey line, 54.75 points 1 groups of inversion interpretation results.As seen from the figure: shallow-layer has a water-bearing layer, unit
Volumetric(al) moisture content is 3.6%, but water-bearing layer thinner thickness；Depth 44-150m interval is a water-bearing layer, and unit volume is aqueous
Amount is 1.3%.The longitudinal relaxation time constant T1* of shallow-layer is smaller, is 420ms when maximum, illustrates that the hole of the rock stratum is smaller, no
Conducive to the preservation of Free water；It is gradually increased in the longitudinal relaxation time constant T1* of depth 44-150m interval, is when maximum
570ms illustrates that the hole of the rock stratum is larger, is conducive to the preservation of Free water.
Further, comprehensive according to each section and the unit volume moisture content of 51m depth, longitudinal relaxation time isopleth plan view
Comparative analysis is closed, 51m depth unit volumetric(al) moisture content plane isopleth Fig. 5 and 51m depth T1 plane isopleth Fig. 6 is depicted,
The relatively better position of watery is provided simultaneously.
The watery for studying area's major part location pressure bittern water-bearing layer is generally poor, but is implicitly present in because of permeability of aquifer
It can strong heterogeneity and the strong rich water section in part that is formed.By comprehensive descision experiment opening sampling site (T1 point) be watery compared with
Good region (attached drawing 7).Moisture content: 5.4%；Relaxation time: 820ms；Permeability: 2.5 × 10-4m/s。
Three, hydrogeologic drilling is verified
Drill footage 150.78m, complete opening coring, field formation lithology edit and record 277 layers of layering, and desk research merges into 91
Layer.It counts the thickness of different lithology and carries out complete opening accumulation (table 2), the hole formation lithology predominantly contains mud, stone as the result is shown
With containing Extra-fine sand, clay halite (29.66%), next is halite (10.38%), gypsic horizon for salt, gypsum clay (43.53%)
(3.36%) contain with argillic horizon (3.84%) wherein mud containing gypsum, fine sand layer and chuco containing halite are respectively less than 3%
Halite saltcake proportion is minimum, and only 0.75%.
2 hole ZKT1 lithology cumulative thickness statistical form of table
Using single hole Pumping Test for Steady Flow, point three examination sections respectively to the Ith pressure bittern layer, the IIth pressure bittern layer and
IIIth pressure bittern layer draws water, and test situation is shown in Table 4.
First examination section is to be drawn water when drilling well is to 33.30m using open-hole, tests 0~33.30m related data.Lower pump is deep
It to 27.00m, is taken out by examination, water level is unable to reach stable state, judges that water is little.It does one and falls journey bailing test greatly, draw water
It lasts shorter, only maintains 14min, water level recovery time is longer and record is complete.Second examination section be when drilling well is to 84.29m, under
Casing carries out sealing to 0~33.30m, and 33.30~84.29m is open-hole, and lower pump is deep to 60.00m, tests 33.30~84.29m
Related data.It is divided to two to fall Cheng Jinhang bailing test with the immersible pump of different flow, is restored in each fall after journey is drawn water
Water-level observation.It is the well depth 151.29m after complete well that third, which tries section, carries out bailing test, lower-continuous mapping to 84.29~151.29m
For 81.50m, stop carrying out water level recovery observation after taking out.
3 hole T1 bailing test situation of table
1. observing data and relation curve
The hole T1 bailing test observation data are shown in Table 4.
4 hole T1 bailing test of table observes data
Q-S relation curve, q-S relation curve and the Q ﹑ S-t duration curve of the hole T1 bailing test three examination sections are shown in Fig. 8.
2. parameter calculates
Using water level decreasing process observation data, Dupit formula calculation permeability coefficient and the radius of influence are utilized.
For pressure-bearing whole well:
K-AQUIFER HYDRAULIC (m/d) in formula；
Q-draws water well yield (m3/d)；
SWDrawdown (m) in-pumped well；
M-artesian aquifer thickness (m)；
R-the radius of influence (m)；
rW- pumped well radius (m).
Hydrogeological parameter calculation the results are shown in Table 5.
5 hole ZKT1 bailing test hydrogeological parameter calculation result of table
By bailing test it is found that basal water water yield is up to 4129.83 (m3/d).It was verified that by " high-precision
Degree gravity+seismic prospecting+ground nuclear magnetic resonance+hydrogeologic drilling " technical method is aobvious in pressure bittern workability test effect
It writes.
Although for illustrative purposes, it has been described that exemplary embodiments of the present invention, those skilled in the art
Member it will be understood that, can be in form and details in the case where the scope and spirit for not departing from invention disclosed in appended claims
On the change that carry out various modifications, add and replace etc., and all these changes all should belong to appended claims of the present invention
Protection scope, and each step in the claimed each department of product and method, can in any combination
Form is combined.Therefore, to disclosed in this invention the description of embodiment be not intended to limit the scope of the invention,
But for describing the present invention.Correspondingly, the scope of the present invention is not limited by embodiment of above, but by claim or
Its equivalent is defined.
Claims (4)
1. a kind of method of seismic wave method detection salt lake bittern, which is characterized in that in turn include the following steps:
(1) using the form in high-precision gravity and magnetic technology analysis and research area, subsiding center；
(2) it is reconnoitred in range in selected, basin basement feature is measured according to different lithology density of earth formations nature difference, judged
The geological structure and distribution of mineral deposits situation of workspace, wherein according to gravity anomaly form, horizontal first derivative extreme point and vertical
First derivative zero point position divides the fracture in research area in conjunction with Euler deconvolution；
(3) it combines seismic prospecting to judge bottom rift structure, is specially explained NMR signal using magnetic nuclear resonance method
For the geometric parameter of hydrogeological parameter and water-bearing layer, depth, thickness and the unit volume water content in water-bearing layer are determined, and mention
Information and prediction water yield for water-bearing layer mean permeability, determine hydrous fluids, determine exploitation well location；
(4) determining rich water point is verified using hydrogeologic drilling, specially uses single hole Pumping Test for Steady Flow, point
Three examination sections respectively draw water to the Ith pressure bittern layer, the IIth pressure bittern layer and the IIIth pressure bittern layer, wherein under water level
Process observation data are dropped, Dupit formula calculation permeability coefficient and the radius of influence are utilized:
For pressure-bearing whole well:
R=10SW√K；
K-AQUIFER HYDRAULIC in formula, unit m/d；
Q-draws water well yield, unit m3/d；
SWDrawdown in-pumped well, unit m；
M-artesian aquifer thickness, unit m；
R-the radius of influence, unit m；
rW- pumped well radius, unit m.
2. the method as described in claim 1, it is characterised in that: judge workspace geological structure include judge anticline, fracture,
Salt dome local structural features.
3. method according to claim 1 or 2, it is characterised in that: the step (2) specifically:
1) construction early-stage preparations, are carried out, static test, dynamic test, Consistency test, scale factor calibration experiment are completed；
2) gravity base point, is set up, work area gravity base point is set in the courtyard wall of guard station, if relatively heavy force value is 0；
3), acquisition gravimetric data acquisition, wherein the gravimetric data of measuring point uses single range observation method, and each working cell head and the tail connect
Basic point, the same day are closed basic point, and work is observed all on basic point by basic point~auxiliary magnet~basic point order before starting, with inspection
Look into whether instrument is in normal operating conditions.
4. the method as described in claim 1, it is characterised in that: drill footage is 150.78m in the step (4), and complete opening takes
Core, field formation lithology edit and record 277 layers of layering, and desk research merges into 91 layers, counts the thickness of different lithology and carries out complete opening
Accumulation.
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