CN109870732A - Three-component gravimeter, exploration data acquisition system and exploration data acquisition method - Google Patents
Three-component gravimeter, exploration data acquisition system and exploration data acquisition method Download PDFInfo
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Abstract
A kind of three-component gravimeter, exploration data acquisition system and exploration data acquisition method provided by the invention, which comprises by three-component gravimeter G.I.H；Wherein, three-component attitude transducer is provided in the three-component gravimeter；Obtain three-component gravitational field measured by the three-component gravimeter；And inclination angle, azimuth and the tendency of three-component gravity sensor are measured by the three-component attitude transducer when the three-component gravimeter measures the three-component gravitational field；The component parameters of the three-component gravitational field are calculated according to the inclination angle, the azimuth and the tendency；Variation or uniformity of the density of earth formations along different component directions are judged according to the component parameters of the three-component gravitational field.The application embodiment provides the three-component gravimeter, exploration data acquisition system and exploration data acquisition method of a kind of accuracy that can improve data.
Description
Technical field
The present invention relates to technical field of geophysical exploration more particularly to a kind of three-component gravimeters, exploration data acquisition
System and exploration data acquisition method.
Background technique
The acquisition of gravimetric prospecting data refers to the measurement to the density of earth formations in petroleum-gas fiedl drilling well.The general density of earth formations root
It is obtained according to the gravity that gravimeter is measured at the different depth in petroleum-gas fiedl drilling well.But since gravimeter is in well
When measurement there may be along hole deviation generate skew situation, so cause gravity measured by gravimeter direction will generate with
The variation of machine, to affect the accuracy for judging density of earth formations according to the gravity.
Summary of the invention
In view of this, the application embodiment provides a kind of three-component gravimeter of accuracy that can improve data, surveys
Visit data collection system and exploration data acquisition method.
Following technical proposal can be used to realize in above-mentioned purpose of the invention: a kind of exploration data acquisition method comprising:
By three-component gravimeter G.I.H；Wherein, three-component attitude transducer is provided in the three-component gravimeter；Described in acquisition
Three-component gravitational field measured by three-component gravimeter；And it is logical when the three-component gravimeter measures the three-component gravitational field
Cross inclination angle, azimuth and the tendency of the three-component attitude transducer measurement three-component gravity sensor；According to the inclination angle, institute
It states azimuth and the tendency calculates the component parameters of the three-component gravitational field；Joined according to the component of the three-component gravitational field
Number judges variation or uniformity of the density of earth formations along different component directions.
As a preferred embodiment, step is according to the calculating of the inclination angle, the azimuth and the tendency
The component parameters of three-component gravitational field；It specifically includes: first level gravity being obtained according to the inclination angle and the tendency and is projected in
The first level weight component on horizontal plane that inclination angle is 0 °；The second horizontal gravity is obtained according to the inclination angle and the tendency to throw
Shadow is at inclination angle for the second horizontal gravity component on 0 ° of horizontal plane and according to the inclination angle and the vertical weight of tendency acquisition
Power is projected in the vertical gravitational component on the vertical plane that inclination angle is 90 °；Wherein, the first level gravity, second level
Gravity and the vertical gravity are three-component gravimeter three-component gravitational field measured by a certain position；And it is described
The direction in the direction of first level gravity, the direction of second horizontal gravity and the vertical gravity is vertical two-by-two；According to
The azimuth obtains the first level component that the first level weight component is projected on the direction that azimuth is 0 °；And
Second horizontal component of the second horizontal gravity component projection on the direction that azimuth is 0 ° is obtained according to the azimuth.
As a preferred embodiment, close according to the component parameters of three-component gravitational field calculating stratum in step
In degree, when the three-component gravimeter is located in horizontal well, sentenced according to the first level component and second horizontal component
Break the variation or uniformity of the density of earth formations in the horizontal direction.
As a preferred embodiment, close according to the component parameters of three-component gravitational field calculating stratum in step
In degree, when the three-component gravimeter is located in vertical shaft, sentenced according to the first level component and second horizontal component
Break the variation or uniformity of the density of earth formations, and the density of earth formations is calculated according to the vertical gravitational component.
As a preferred embodiment, close according to the vertical component calculating stratum by the method for inverting
Degree.
As a preferred embodiment, further include: different positions in the well are obtained by the three-component gravimeter
The three-component gravitational field set；And pass through the three-component posture when the three-component gravimeter measures three-component gravitational field
The inclination angle, azimuth of three-component gravity sensor described in sensor measurement and tendency；According to the inclination angle, the azimuth and institute
State the component parameters that tendency calculates the three-component gravitational field of each position；According to the three-component gravitational field of each position
Component parameters judge variation or uniformity of the density of earth formations along different component directions.
A kind of three-component gravimeter comprising: shell；Three-component gravity sensor is set in the shell；Three points
Attitude transducer is measured, is set in the shell, and the three-component attitude transducer is set to the three-component gravity and passes
On sensor；The three-component attitude transducer is used to measure inclination angle, azimuth and the tendency of the three-component gravity sensor.
As a preferred embodiment, the shell is by titanium alloy steel, reinforcing glass fiber or enhancing carbon fiber
One of material be made.
As a preferred embodiment, the three-component gravity sensor is multiple, multiple three-component gravity
Sensor is alternatively arranged along the vertical direction, and the three-component attitude transducer is multiple, and multiple three-component postures sense
Device is corresponding with multiple three-component gravity sensors, and each three-component attitude transducer is set to corresponding described three
On component gravity sensor.
As a preferred embodiment, each three-component attitude transducer is set to the corresponding three-component
The bottom of gravity sensor.
A kind of exploration data acquisition system comprising: multiple three-component gravimeters as described above；A plurality of armored cable,
Every armored cable connects two three-component gravimeters.
The beneficial effect of three-component gravimeter provided by the present application, exploration data acquisition system and exploration data acquisition method
Fruit is: three-component gravimeter, exploration data acquisition system described in the application embodiment and exploration data acquisition method are logical
Three-component gravity measured by three-component gravimeter can obtained by crossing the setting three-component attitude transducer in three-component gravimeter
Inclination angle, azimuth and the tendency of three-component gravity sensor position are obtained while field, so as to according to the inclination angle, azimuth
Inclination conditions of the three-component gravimeter in measurement are known with tendency, can so calculate three-component measured by three-component gravimeter
The vertical component or horizontal component of gravitational field；And judge density of earth formations along different points according to the component parameters of three-component gravitational field
Measure the variation or uniformity in direction.Therefore three-component gravimeter, exploration data acquisition system described in the application embodiment with
And exploration data acquisition method can the direction of three-component gravitational field measured by three-component gravimeter when changing at random, obtain three
The component parameters of component gravitational field, and variation of the density of earth formations along component direction is judged according to the component parameters, so guarantee pair
The variation of density of earth formations carries out accurate judgement, to improve the accuracy of data.Therefore, the application embodiment provides one kind
The three-component gravimeter, exploration data acquisition system and exploration data acquisition method of the accuracy of data can be improved.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the flow chart for the exploration data acquisition method that one embodiment of the present invention provides；
Fig. 2 is the structural schematic diagram for the three-component gravimeter that one embodiment of the present invention provides；
Fig. 3 is the structural schematic diagram for the three-component gravimeter that another embodiment of the present invention provides；
Fig. 4 is the structural schematic diagram for the exploration data acquisition system that another embodiment of the present invention provides；
Fig. 5 is the structural schematic diagram for the exploration data acquisition system that another embodiment of the present invention provides；
Fig. 6 is the structural schematic diagram for the three-component gravity sensor that one embodiment of the present invention provides.
Description of symbols:
11, three-component gravity sensor；13, three-component attitude transducer；15, three-component gravimeter；17, armored cable；
21, shell；23, the first module；25, the second module；27, third module.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 2 is please referred to Fig. 3.The application embodiment provides a kind of three-component gravimeter comprising: shell 21；Three
Component gravity sensor 11 is set in shell 21；Three-component attitude transducer 13 is set in shell 21, and three points
Amount attitude transducer 13 is set on three-component gravity sensor 11；Three-component attitude transducer 13 is for measuring three-component gravity
Inclination angle, azimuth and the tendency of sensor 11.
As can be seen from the above technical solutions: three-component gravimeter described in the application embodiment passes through in three-component weight
Three-component attitude transducer 13 is set on force snesor 11, three-component gravitational field measured by three-component gravimeter 15 can obtained
While obtain inclination angle, azimuth and the tendency of three-component gravity sensor 11, so as to according to the inclination angle, azimuth and incline
To inclination conditions of the three-component gravimeter 15 in measurement are known, three-component measured by three-component gravimeter 15 can be so calculated
The component parameters of gravitational field, such as vertical gravitational component parameter or horizontal gravity component parameters；And according to three-component gravitational field
Component parameters judge the variation or uniformity of density of earth formations.Therefore 15 energy of three-component gravimeter described in the application embodiment
When the direction of three-component gravitational field measured by three-component gravimeter 15 changes at random, surveyed by three-component attitude transducer
Inclination angle, azimuth and the tendency of the three-component gravity sensor 11 of amount obtain the component parameters of three-component gravitational field, and according to this
Component parameters judge variation or uniformity of the density of earth formations along the component direction, so guarantee to density of earth formations along different component sides
To variation or uniformity carry out accurate judgement, to improve the accuracy of data.
Further, which can be three-component gravity sensor 11.I.e. as shown in fig. 6, the three-component
Gravity sensor 11 includes for measuring the first module 23 of the first level gravity along first level direction, for measuring along the
Second module 25 of the vertical gravity in three directions and third mould for measuring the second horizontal gravity along the second horizontal direction
Block 27.The direction in the direction of the first level gravity, the direction of the second horizontal gravity and vertical gravity is vertical two-by-two.Namely it should
The direction of any two gravity is equal in the direction in the direction of first level gravity, the direction of the second horizontal gravity and vertical gravity
It is mutually perpendicular to.That is, first level direction, the second horizontal direction and third direction constitute a three-dimensional orthogonal coordinate system.
Such as shown in fig. 6, first level direction is X-direction, the second horizontal direction is Y direction, and third direction is Z-direction.
Further, first module 23, the second module 25 and third module 27 can use existing construction, not to this application
It provides.Certain gravity sensor 11 is not limited to three-component gravity sensor 11, and can also be can only measure a direction weight
The gravity sensor 11 of power, does not provide this application.
Further, three-component gravity sensor is multiple, multiple three-component gravity sensors row of interval along the vertical direction
Column, three-component attitude transducer is multiple, and multiple three-component attitude transducers are corresponding with multiple three-component gravity sensors,
Each three-component attitude transducer is set on corresponding three-component gravity sensor.
As shown in figure 3, in one embodiment, there are two three-component gravity sensor 11 and two for setting in shell 21
Three-component attitude transducer 13, two three-component gravity sensors 11 are spaced setting along the vertical direction, and each three-component gravity passes
The bottom of sensor 11 is provided with a three-component attitude transducer 13.To which on the one hand each three-component gravity sensor 11 can be surveyed
Inclination angle, azimuth and the tendency for measuring the three-component gravitational field at its present position and each three-component gravity sensor 11 can be by
The three-component attitude transducer 13 of its bottom obtains, on the other hand can be measured according to two three-component gravity sensors 11 this two
The gravity gradient of a 11 present position of three-component gravity sensor.
Certainly, the quantity for the three-component gravity sensor 11 being arranged in shell 21 is not limited to two, can also be one.Example
Such as shown in Fig. 2, being provided with a three-component gravity sensor 11 and a three-component attitude transducer 13 in shell 21, and should
Three-component attitude transducer 13 is set to the bottom of three-component gravity sensor 11.To which the three-component gravity sensor 11 can be surveyed
Inclination angle, azimuth and the tendency for measuring the three-component gravitational field at its present position and the three-component gravity sensor 11 can be by them
The three-component attitude transducer 13 of bottom obtains.
Preferably, each three-component attitude transducer is set to the bottom of corresponding three-component gravity sensor.
Further, as shown in Figure 4, Figure 5, the application embodiment provides a kind of exploration data acquisition system, packet
It includes: multiple three-component gravimeters 15 as described above；A plurality of armored cable 17, every armored cable 17 connect two described three points
Measure gravimeter 15.
As can be seen from the above technical solutions: exploration data acquisition system described in the application embodiment passes through at three points
It measures and three-component attitude transducer 13 is set on gravity sensor 11, three-component weight measured by three-component gravimeter 15 can obtained
Inclination angle, azimuth and the tendency of three-component gravity sensor 11 are obtained while the field of force, so as to according to the inclination angle, azimuth
Inclination conditions of the three-component gravimeter 15 in measurement are known with tendency, can so be calculated three measured by three-component gravimeter 15
The component parameters of component gravitational field, such as vertical component parameter or horizontal component parameter；And according to point of three-component gravitational field
Amount parameter judges variation or uniformity of the density of earth formations along different directions.Therefore three-component gravity described in the application embodiment
Instrument 15 can the direction of three-component gravitational field measured by three-component gravimeter 15 when changing at random, sensed by three-component posture
The inclination angle, azimuth of three-component gravity sensor 11 measured by device and tendency obtain the component parameters of three-component gravitational field, and
Variation or uniformity of the density of earth formations along the component direction are judged according to the component parameters, are so guaranteed to density of earth formations along different
The variation of component direction or uniformity carry out accurate judgement, to improve the accuracy of data.
As shown in Figure 4, Figure 5, further, which is multiple, and multiple three-component gravimeters 15 are along upper
Lower direction is alternatively arranged.Specifically, multiple shells 21 are connected in series by armored cable 17, so that it is single to form multiple independent measurements
Member, each measuring unit by each shell 21 three-component gravity sensor 11 and three-component attitude transducer 13 constitute.From
And it is capable of measuring the three-component gravitational field of different depth in well.To which on the one hand each three-component gravity sensor 11 is capable of measuring its institute
Inclination angle, azimuth and the tendency for locating the three-component gravitational field at position and each three-component gravity sensor 11 can be by corresponding
Three-component attitude transducer 13 obtains, on the other hand can be according to two three-component gravity sensors 11 in two neighboring shell 21
Measure gravity gradient.Preferably, the spacing between adjacent shells 21 is equal.So as to according to each three-component gravity sensor
Distance computation between three-component gravitational field measured by 11 and adjacent three-component gravity sensor 11 goes out gravity gradient.
As shown in Figure 1, the exploration data acquisition method that a kind of embodiment of the application provides, may include: step
S11: by three-component gravimeter G.I.H；Wherein, three-component attitude transducer is provided in the three-component gravimeter；Step
S13: three-component gravitational field measured by the three-component gravimeter is obtained；And in described three points of three-component gravimeter measurement
Inclination angle, azimuth and the tendency of three-component gravity sensor are measured when measuring gravitational field by the three-component attitude transducer；Step
Rapid S15: the component parameters of the three-component gravitational field are calculated according to the inclination angle, the azimuth and the tendency；Step
S17: variation or uniformity of the density of earth formations along different component directions are judged according to the component parameters of the three-component gravitational field.
As can be seen from the above technical solutions: exploration data acquisition method described in the application embodiment passes through at three points
Three-component gravitational field measured by three-component gravimeter 15 can obtained by measuring setting three-component attitude transducer 13 in gravimeter 15
While obtain inclination angle, azimuth and the tendency of three-component gravity sensor 11, so as to according to the inclination angle, azimuth and incline
To inclination conditions of the three-component gravimeter 15 in measurement are known, three-component measured by three-component gravimeter 15 can be so calculated
The component parameters of gravitational field, such as vertical component parameter or horizontal component parameter；And joined according to the component of three-component gravitational field
Number judges variation or uniformity of the density of earth formations along different component directions.Therefore survey data described in the application embodiment is adopted
Set method can the direction of the gravitational field measured by three-component gravimeter 15 when changing at random, obtain the component of three-component gravitational field
Parameter, and variation or uniformity of the density of earth formations along the component direction are judged according to the component parameters, so guarantee close to stratum
It spends variation or uniformity along different component directions and carries out accurate judgement, to improve the accuracy of data.
As shown in Figure 1, in the present embodiment, step S11: by 15 G.I.H of three-component gravimeter.Wherein, three-component
Three-component attitude transducer 13 is provided on gravimeter 15.Specifically, three-component gravimeter 15 can be connected with armored cable 17
It connects, so as to pass through decentralization armored cable 17, so that in 15 tripping in well section to be measured of weight three-component gravimeter.
Further, three-component gravity sensor 11 and three-component attitude transducer are both secured in shell 21.So as to
Three-component gravity sensor 11 and three-component attitude transducer 13 is avoided to collide with barrier in well.Further, in order to support
Damage of the well liquid of anti-underground high temperature and pressure to three-component gravity sensor 11 and three-component attitude transducer 13 in the shell 21
Bad, the shell 21 of one of titanium alloy steel, reinforcing glass fiber or enhancing carbon fiber material by being made, to resist well
Under high pressure and protect all the sensors in shell and signal amplification, acquisition and storage circuit board.
Further, three-component attitude transducer 13 is set to the bottom of three-component gravity sensor 11.
Further, which is connected with armored cable 17.So as to pass through decentralization armored cable 17, so that three points
Gravity sensor 11 is measured in 21 tripping in of shell well section to be measured.
In the present embodiment, step S13: three-component gravitational field measured by three-component gravimeter 15 is obtained；And three
Three-component gravity sensor 11 is measured by three-component attitude transducer 13 when component gravimeter 15 measures three-component gravitational field
Inclination angle, azimuth and tendency.The inclination angle can be angle or straight line formed by straight line or plane and horizontal line or horizontal plane and its
Angle formed by projection in the plane.The azimuth can be from certain north pointer direction line put, arrive target according to clockwise direction
Horizontal sextant angle between direction line.The tendency can be the side of straight line that is vertical with strike line in level and being drawn downwards along inclined-plane
To.To can determine that posture of the three-component gravimeter 15 when measuring three-component gravitational field by the inclination angle, azimuth and tendency,
It can so convert to three-component gravitational field measured by three-component gravimeter 15.
It is possible to further pass through armored cable 17 for three-component gravitational field measured by three-component gravimeter 15 and three points
Inclination angle, azimuth and tendency measured by amount attitude transducer 13 are transmitted on ground.Certainly, three-component gravimeter 15 and three points
Amount attitude transducer 13 can also be electrically connected with storage device, so as to by three-component measured by three-component gravimeter 15
Inclination angle, azimuth and tendency measured by gravitational field and three-component attitude transducer 13 are stored in the storage device to obtain weight
Three-component gravitational field measured by power instrument 15.The storage device is, for example, disk, and certain storage device is without being limited thereto, can be with
It is other hardware, this application is not provided.Since three-component attitude transducer 13 and three-component gravity sensor 11 are equal
It is fixed with 21 phase of shell, so when three-component 15 run-off the straight of gravimeter, the also run-off the straight of shell 21, thus three-component posture
Sensor 13 can be measured the inclination angle, azimuth and tendency of three-component gravity sensor 11.The three-component attitude transducer 13 can
To use existing construction, this application is not provided.
In one embodiment, step S13: three-component gravitational field measured by three-component gravimeter 15 is obtained；And
Three-component gravity sensor 11 is measured by three-component attitude transducer 13 when three-component gravimeter 15 measures three-component gravitational field
Inclination angle, azimuth and tendency, specifically include:
Obtain first level gravity, the second horizontal gravity and vertical gravity measured by three-component gravity sensor 11；
And three-component gravity sensitive is measured by three-component attitude transducer 13 when three-component gravimeter 15 measures three-component gravitational field
Inclination angle, azimuth and the tendency of device 11.Specifically, first level measured by the first module 23 of three-component gravimeter 15 is obtained
Gravity；Vertical gravity measured by the second module 25 of three-component gravimeter 15 is obtained, the third of three-component gravimeter 15 is obtained
Second horizontal gravity measured by module 27；And pass through three-component appearance when three-component gravimeter 15 measures three-component gravitational field
Inclination angle, azimuth and the tendency of the measurement three-component gravity sensor 11 of state sensor 13.
In the present embodiment, step S15: joined according to the component that inclination angle, azimuth and tendency calculate three-component gravitational field
Number.For example, calculating the vertical component parameter and/or horizontal component parameter of three-component gravitational field according to inclination angle, azimuth and tendency.
Certainly, which is not limited to vertical component parameter or horizontal component parameter, can also be the component parameters in other directions.
For example, the component parameters on fixed-direction or on preset direction, do not provide this application.
In one embodiment, the component of three-component gravitational field step S15: is calculated according to inclination angle, azimuth and tendency
Parameter；It specifically includes:
Step S151: first that first level gravity is projected on the horizontal plane that inclination angle is 0 ° is obtained according to inclination angle and tendency
Horizontal gravity component；The second level that the second horizontal gravity is projected on the horizontal plane that inclination angle is 0 ° is obtained according to inclination angle and tendency
Weight component and the vertical gravity point being projected according to inclination angle and tendency acquisition vertical gravity on the vertical plane that inclination angle is 90 °
Amount；Wherein, first level gravity, the second horizontal gravity and vertical gravity are three-component gravimeter measured by a certain position
Three-component gravitational field；And the direction in the direction of first level gravity, the direction of the second horizontal gravity and vertical gravity is two-by-two
Vertically.
Also i.e. by three-component gravity sensor 11 first level gravity, the second horizontal gravity measured by a certain position
And the inclination angle that vertical gravity is provided according to the three-component attitude transducer 13 of this position carries out rotation processing with tendency.So will
First level gravity, the second horizontal gravity and the vertical gravity measured rotates in the three-dimensional space that inclination angle is 0 °, at this time
Vertical gravity will become vertical gravitational component perpendicular to ground level, the mutually orthogonal horizontal gravity of two measured (i.e.
One horizontal gravity and the second horizontal gravity) become two mutually orthogonal horizontal gravity components for being parallel to ground level.
Step S153: first that first level weight component is projected on the direction that azimuth is 0 ° is obtained according to azimuth
Horizontal component；And second level of the second horizontal gravity component projection on the direction that azimuth is 0 ° is obtained according to azimuth
Component.
Namely the azimuth according to measured by this position is by the first level weight component obtained after aforementioned rotation and
Two horizontal gravity components rotate to azimuth be zero degree position, at this time the two of gravity horizontal component (i.e. first level component,
Second horizontal component) horizontal component will be become as north-south, another horizontal component is East and West direction, and vertical component is still
Remain perpendicular to level ground.So as to three-component gravimeter 15 at random change when, will be measured by three-component gravimeter 15
Three-component gravitational field is converted into vertical component parameter and/or horizontal component parameter.
In the present embodiment, step S17: judge density of earth formations along different points according to the component parameters of three-component gravitational field
Measure the variation or uniformity in direction.Due to when three-component gravimeter 15 changes at random, three measured by three-component gravimeter 15
Component gravitational field can be converted into vertical component parameter and/or horizontal component parameter, so ensure that according to three-component gravitational field
Component parameters judge density of earth formations along the variation of different component directions or the accuracy of uniformity.
In one embodiment, density of earth formations is calculated according to the component parameters of the three-component gravitational field in step S17
Along the variation or uniformity of component direction, when the three-component gravimeter is located in horizontal well, according to the first level
Component and second horizontal component judge the variation or uniformity of the density of earth formations in the horizontal direction.
Due to the gravity in horizontal well and entry horizontal component with the variation of horizontal position (or transversely) be by
Caused by variation of the underground Density inhomogeneity body (fluid in rock or blowhole) on lateral position.Therefore can lead to
It crosses first level component and the second horizontal component judges the variation or uniformity of density of earth formations in the horizontal direction, and then be inferred to bore
Around well or tunnel in a certain range in rock or blowhole fluid density variation, with can be used for survey region texture
It makes, explore Solid Mineral and petroleum resources and the monitoring of underground fluid long-term dynamics is carried out to the oil gas field for entering the productive life.
In another embodiment, close according to the component parameters of three-component gravitational field calculating stratum in step S17
Degree is along the variation or uniformity of component direction, when the three-component gravimeter is located in vertical shaft, according to the first level
Component and second horizontal component judge the variation or uniformity of the density of earth formations, and calculate institute according to the vertical component
State density of earth formations.Specifically, the density of earth formations is calculated according to the vertical component by the method for inverting.
Specifically, when three-component gravimeter 15 is located in vertical shaft, three-component gravity measured by three-component gravimeter 15
When the component of field in the horizontal direction is zero, and the component of three-component gravitational field vertically measured by three-component gravimeter 15
When being not zero, then the density of earth formations below 15 measurement point of three-component gravimeter and around measuring point is uniform and stratum is horizontal
's.When three-component gravimeter 15 is located in vertical shaft, three-component gravitational field measured by three-component gravimeter 15 is in the horizontal direction
Component and component vertically when being not zero, then the density of earth formations below 15 measurement point of gravimeter and around measuring point is
Variation or non-uniform or stratum are not horizontal.Variation or uniformity due to density of earth formations are by underground Density inhomogeneity body
Caused by the variation of the vertical position or lateral position of (fluid in rock or blowhole).So according to density of earth formations
Variation or uniform performance detect the rock of the different densities in stratum or the regularity of distribution of fluid.
Further, the exploration data acquisition method that a kind of embodiment of the application provides, further includes:
Step S19: the three-component gravitational field of different location in the well is obtained by the three-component gravimeter 15；
And attitude transducer is stated by institute's three-component when the three-component gravimeter 15 measures three-component gravitational field and measures described three points
Measure inclination angle, azimuth and the tendency of gravity sensor 11.
Specifically, when three-component gravimeter 15 is located in vertical shaft, three-component gravimeter 15 is moved along the vertical direction, thus
The three-component gravitational field of different depth position in vertical shaft can be obtained by the three-component gravimeter 15 in vertical shaft.Certainly it obtains perpendicular
The three-component gravitational field of different depth position is not limited to mobile three-component gravimeter 15 in well, when using above-mentioned three-component gravity
When there is multiple three-component gravity sensors 11 in instrument 15, three-component gravimeter 15 can not be moved, and is passed by multiple gravity
Sensor 11 obtains the three-component gravitational field or two adjacent or non-conterminous three-component gravity sensitives of different depth position in vertical shaft
Gravity gradient field between device.
When three-component gravimeter 15 is located in horizontal well, move three-component gravimeter 15 in the horizontal direction, so as to
The three-component gravitational field of different level position in level is obtained in horizontal well by the three-component gravimeter 15.Certainly it obtains horizontal
The three-component gravitational field of different level position is not limited to mobile gravimeter 15 in well, when using in above-mentioned three-component gravimeter 15
When with multiple three-component gravity sensors 11, three-component gravimeter 15 can not be moved, and is passed by multiple three-component gravity
Sensor 11 obtains the three-component gravitational field or two adjacent or non-conterminous three-component gravity sensitives of different level position in level
Gravity gradient field between device.
Step S21: the three-component gravity of each position is calculated according to the inclination angle, the azimuth and the tendency
The component parameters of field.The component parameters can be vertical component parameter and/or horizontal component parameter.Certainly, the component parameters are not
It is limited to vertical component parameter or horizontal component parameter, can also be the component parameters in other directions.For example, on fixed-direction
Or the component parameters on preset direction, this application is not provided.
Specifically, when the gravity sensor in three-component gravimeter 15 is above-mentioned three-component gravity sensor 11, and
When the three-component gravimeter 15 is located in vertical shaft, the of different depth position in vertical shaft is calculated according to inclination angle, azimuth and tendency
One horizontal gravity component, the second horizontal gravity component and vertical gravitational component.When three-component gravimeter 15 is located in horizontal well
When, the first level component of different level position three-component gravitational field, the in horizontal well are calculated according to inclination angle, azimuth and tendency
Two horizontal components and vertical gravitational component.
Step S23: judge density of earth formations along different points according to the component parameters of the three-component gravitational field of each position
Measure the variation or uniformity in direction.
Specifically, when the gravity sensor in three-component gravimeter 15 is above-mentioned three-component gravity sensor 11, and again
When power instrument 15 is located in vertical shaft, the density of earth formations is judged according to the vertical component of the three-component gravitational field of different depth position
With the variation or uniformity of depth direction.
Since the vertical component of three-component gravitational field in the shaft is by underground Density inhomogeneity body with the variation of depth
(fluid in rock or blowhole) is vertically caused by the variation of position.So according to the change with depth of density of earth formations
Change or uniformly performance detects the rock of the different densities in stratum or the space distribution rule of fluid.
Specifically, when the gravity sensor in three-component gravimeter 15 is above-mentioned three-component gravity sensor 11, and three
When component gravimeter 15 is located in horizontal well, according to the first level component and second of the three-component gravitational field of different depth position
Horizontal component judges the variation or uniformity of the density of earth formations transversely position.
Since the horizontal component of the gravitational field in horizontal well is by underground Density inhomogeneity body with the variation of horizontal direction
(fluid in rock or blowhole) is transversely caused by the variation of position.So according to density of earth formations transversely position
Variation or uniform performance detect the rock of the different densities in stratum or the space distribution rule of fluid.
The above is only several embodiments of the present invention, those skilled in the art can be right according to application documents disclosure
The embodiment of the present invention carries out various changes or modifications without departing from the spirit and scope of the present invention.
Claims (11)
1. a kind of exploration data acquisition method, characterized in that it comprises:
By three-component gravimeter G.I.H；Wherein, three-component attitude transducer is provided in the three-component gravimeter；
Obtain three-component gravitational field measured by the three-component gravimeter；And in described three points of three-component gravimeter measurement
Inclination angle, azimuth and the tendency of three-component gravity sensor are measured when measuring gravitational field by the three-component attitude transducer；
The component parameters of the three-component gravitational field are calculated according to the inclination angle, the azimuth and the tendency；
Variation or uniformity of the density of earth formations along different component directions are judged according to the component parameters of the three-component gravitational field.
2. exploration data acquisition method according to claim 1, it is characterised in that: step is according to the inclination angle, the side
Parallactic angle and the tendency calculate the component parameters of the three-component gravitational field；It specifically includes:
The first level that first level gravity is projected on the horizontal plane that inclination angle is 0 ° is obtained according to the inclination angle and the tendency
Weight component；Second that the second horizontal gravity is projected on the horizontal plane that inclination angle is 0 ° is obtained according to the inclination angle and the tendency
Horizontal gravity component and to obtain vertical gravity to be projected in inclination angle according to the inclination angle and the tendency be on 90 ° of vertical plane
Vertical gravitational component；Wherein, the first level gravity, second horizontal gravity and the vertical gravity are described three points
Measure gravimeter three-component gravitational field measured by a certain position；And the direction of the first level gravity, second water
The direction of flat gravity and the direction of the vertical gravity are vertical two-by-two；
The first level that the first level weight component is projected on the direction that azimuth is 0 ° is obtained according to the azimuth
Component；And second of the second horizontal gravity component projection on the direction that azimuth is 0 ° is obtained according to the azimuth
Horizontal component.
3. exploration data acquisition method according to claim 2, it is characterised in that: in step according to the three-component gravity
The component parameters of field calculate in density of earth formations, when the three-component gravimeter is located in horizontal well, according to the first level point
Amount and second horizontal component judge the variation or uniformity of the density of earth formations in the horizontal direction.
4. exploration data acquisition method according to claim 2, it is characterised in that: in step according to the three-component gravity
The component parameters of field calculate in density of earth formations, when the three-component gravimeter is located in vertical shaft, according to the first level point
Amount and second horizontal component judge the variation or uniformity of the density of earth formations, and are calculated according to the vertical gravitational component
The density of earth formations.
5. exploration data acquisition method according to claim 4, it is characterised in that: hung down by the method for inverting according to described
Straight component calculates the density of earth formations.
6. exploration data acquisition method according to claim 1, which is characterized in that further include:
The three-component gravitational field of different location in the well is obtained by the three-component gravimeter；And in the three-component
Inclining for the three-component gravity sensor is measured by the three-component attitude transducer when gravimeter measures three-component gravitational field
Angle, azimuth and tendency；
The component ginseng of the three-component gravitational field of each position is calculated according to the inclination angle, the azimuth and the tendency
Number；
Judge density of earth formations along the variation of different component directions according to the component parameters of the three-component gravitational field of each position
Or uniformity.
7. a kind of three-component gravimeter, characterized in that it comprises:
Shell；
Three-component gravity sensor is set in the shell；
Three-component attitude transducer is set in the shell, and the three-component attitude transducer is set to described three points
It measures on gravity sensor；The three-component attitude transducer is used to measure inclination angle, the azimuth of the three-component gravity sensor
And tendency.
8. three-component gravimeter according to claim 7, it is characterised in that: the shell is by titanium alloy steel, enhancing glass
One of glass fiber or enhancing carbon fiber material are made.
9. three-component gravimeter according to claim 7, it is characterised in that: the three-component gravity sensor be it is multiple,
Multiple three-component gravity sensors are alternatively arranged along the vertical direction, and the three-component attitude transducer is multiple and multiple
The three-component attitude transducer is corresponding with multiple three-component gravity sensors, each three-component attitude transducer
It is set on the corresponding three-component gravity sensor.
10. three-component gravimeter according to claim 9, it is characterised in that: each three-component attitude transducer is set
It is placed in the bottom of the corresponding three-component gravity sensor.
11. a kind of exploration data acquisition system, characterized in that it comprises:
Multiple three-component gravimeters as described in any one of claim 7 to 10；
A plurality of armored cable, every armored cable connect two three-component gravimeters.
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