CN111852467A - Method and system for delineating extension range of sandstone uranium ore body - Google Patents
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- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 48
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Abstract
The invention discloses a method and a system for delineating the extension range of sandstone uranium ore bodies. The invention belongs to the sandstone uranium mine exploration field. The method comprises the following steps: logging in an industrial hole to obtain logging data, geological stratification and lithology histograms; coring a target layer containing ores in an industrial hole, measuring the longitudinal wave velocity, the transverse wave velocity and the density of a rock sample, calculating the longitudinal wave impedance and the transverse wave impedance, and manufacturing a rock physical quantity plate for distinguishing an ore body from surrounding rocks; acquiring three-dimensional seismic data around an industrial hole, finishing data processing and interpretation, acquiring longitudinal wave impedance distribution and transverse wave impedance distribution of a target layer through seismic prestack inversion on the basis, and circling the distribution range of ore-containing rocks on the longitudinal wave impedance distribution diagram and the transverse wave impedance distribution diagram according to a rock physical quantity plate to acquire the extension range of sandstone uranium ore bodies. The method provides a technical method for delineating the extension range of the sandstone uranium ore body, is green and environment-friendly, and accelerates the exploration period of the sandstone uranium ore.
Description
Technical Field
The invention relates to the technical field of sandstone uranium ore exploration, in particular to a method and a system for delineating the extension range of a sandstone uranium ore body.
Background
In sandstone uranium ore exploration, after an industrial hole with mining value is found, in order to determine the extension range of a sandstone uranium ore body, a large number of drill holes are required to be arranged to investigate the extension of the ore body, the range of the ore body is defined, and the environment can be damaged while a large amount of expenditure is invested. How to realize the delineation of the extension range of sandstone uranium ore bodies under the condition of not arranging a large number of drill holes becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a method and a system for delineating the extension range of a sandstone uranium ore body, so as to realize the delineation of the extension range of the sandstone uranium ore body without arranging a large number of drill holes.
In order to achieve the purpose, the invention provides the following scheme:
a delineation method for the extension range of sandstone uranium ore bodies comprises the following steps:
carrying out logging and logging operations on the industrial hole to obtain logging data and logging data; the logging data comprises sound waves and densities at different depths of the industrial hole, and the logging data comprises geological stratification and lithology histograms of the industrial hole;
sampling an ore-containing target layer of the industrial hole to obtain a plurality of ore-containing samples and a plurality of surrounding rock samples;
according to the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample, manufacturing a rock physical quantity plate for distinguishing an ore body from surrounding rocks;
acquiring three-dimensional seismic data of a region to be surveyed around the industrial hole by using a seismograph;
performing stack processing and migration processing on the three-dimensional seismic data by using seismic data processing software to obtain three-dimensional seismic processing data; the seismic processing data comprises pure wave data and achievement data;
interpreting the three-dimensional seismic processing data by using the logging data and the logging data to obtain seismic interpretation data of the three-dimensional seismic data, wherein the seismic interpretation data comprise a layer position and a fracture position of a mineral-containing target layer;
performing seismic prestack inversion on a seismic prestack gather data volume of the three-dimensional seismic data by using the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of a mineral-containing target layer;
and according to the longitudinal wave impedance distribution and the transverse wave impedance distribution of the ore-bearing target layer, the extension range of the sandstone uranium ore body is defined by the rock physical quantity plate.
Optionally, the logging and logging operations are performed on the industrial hole, and logging data are obtained, which specifically include:
measuring sound waves and density at different depths of the industrial hole by using a logging instrument;
drilling and coring are carried out on the industrial hole to obtain a rock core;
determining geological stratification of the industrial hole according to lithology of each section of the rock core;
a lithology histogram is created from the lithology of each geological layer of the core.
Optionally, the manufacturing of the rock physical quantity plate for distinguishing the ore body from the surrounding rock according to the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample specifically includes:
respectively measuring the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample by adopting an ultrasonic pulse transmission method;
measuring the density of each ore-containing sample and each surrounding rock sample by adopting a volume method;
respectively multiplying the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample with the density of each ore-containing sample and each surrounding rock sample to obtain the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample;
establishing a coordinate system by taking transverse wave impedance as an abscissa axis of the rock physical quantity plate and longitudinal wave impedance as an ordinate axis of the rock physical quantity plate;
respectively projecting intersection points of longitudinal wave impedance and transverse wave impedance of each ore-containing sample and each surrounding rock sample to the coordinate system to obtain an intersection graph;
and (4) enclosing the area containing the ore sample on the cross plot to obtain a rock physical quantity plate for distinguishing the ore body from the surrounding rock.
Optionally, the three-dimensional seismic processing data is interpreted by using the logging data and the logging data to obtain seismic interpretation data of the three-dimensional seismic data, where the seismic interpretation data includes a horizon and a fracture position of a mineral-containing target layer, and the method specifically includes:
adopting three-dimensional seismic data interpretation software to perform synthetic seismic recording operation on the three-dimensional seismic processing data and the logging data, and completing calibration of the horizon of the mineral-containing target layer of the seismic data;
and tracking the three-dimensional seismic processing data of the layer of the ore-containing target layer, and determining the fracture position of the ore-containing target layer according to the homodromous characteristics of the three-dimensional seismic processing data.
Optionally, the performing seismic prestack inversion on the seismic prestack gather data volume of the three-dimensional seismic data by using the logging data, and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of the ore-bearing target layer specifically includes:
processing the three-dimensional seismic data by using three-dimensional seismic data processing software to obtain a seismic prestack gather data volume;
and performing seismic prestack inversion on the seismic prestack gather data volume by using the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of the ore-bearing target layer.
A delineation system for sandstone uranium ore body extension, the delineation system comprising:
the logging and logging module is used for performing logging and logging operations on the industrial hole to acquire logging data and logging data; the logging data comprises sound waves and densities at different depths of the industrial hole, and the logging data comprises geological stratification and lithology histograms of the industrial hole;
the sample acquisition module is used for sampling in an ore-containing target layer of the industrial hole to obtain a plurality of ore-containing samples and a plurality of surrounding rock samples;
the rock physical gauge plate establishing module is used for manufacturing a rock physical gauge plate for distinguishing ore bodies and surrounding rocks according to the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample;
the three-dimensional seismic data acquisition module is used for acquiring three-dimensional seismic data of the area to be surveyed around the industrial hole through a seismograph;
the three-dimensional seismic data processing module is used for carrying out stack processing and migration processing on the three-dimensional seismic data by utilizing seismic data processing software to obtain three-dimensional seismic processing data; the seismic processing data comprises pure wave data and achievement data;
the three-dimensional seismic data interpretation module is used for interpreting the three-dimensional seismic processing data by using the logging data and the logging data to obtain seismic interpretation data of the three-dimensional seismic data, and the seismic interpretation data comprise a horizon and a fracture position of a mineral-containing target layer;
the three-dimensional seismic data inversion module is used for performing seismic prestack inversion on a seismic prestack gather data volume of the three-dimensional seismic data by using the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of a mineral-containing target layer;
and the delineating module is used for delineating the extension range of the sandstone uranium ore body by utilizing the rock physical quantity plate according to the longitudinal wave impedance distribution and the transverse wave impedance distribution of the ore-bearing target layer.
Optionally, the logging and logging module specifically includes:
the logging submodule is used for measuring sound waves and density of different depths of the industrial hole by using a logging instrument;
the drilling coring sub-module is used for performing drilling coring on the industrial hole to obtain a core;
the geological stratification determining submodule is used for determining the geological stratification of the industrial hole according to the lithology of each section of the rock core;
and the lithology histogram establishing sub-module is used for establishing the lithology histogram according to the lithology of each geological layer of the rock core.
Optionally, the rock physical quantity plate building module specifically includes:
the wave velocity measuring submodule is used for respectively measuring the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample by adopting an ultrasonic pulse transmission method;
the density measurement submodule is used for respectively measuring the density of each ore-containing sample and each surrounding rock sample by adopting a volume method;
the impedance calculation submodule is used for multiplying the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample by the density of each ore-containing sample and each surrounding rock sample respectively to obtain the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample;
the coordinate system establishing submodule is used for establishing a coordinate system by taking transverse wave impedance as an abscissa axis of the rock physical quantity plate and longitudinal wave impedance as an ordinate axis of the rock physical quantity plate;
the intersection point projection submodule is used for projecting intersection points of longitudinal wave impedance and transverse wave impedance of each ore-containing sample and each surrounding rock sample to the coordinate system respectively to obtain an intersection graph;
and the mineral-containing rock impedance distribution range delineating sub-module is used for delineating the region of the mineral-containing sample on the cross plot to obtain a rock physical quantity plate for distinguishing the ore body from the surrounding rock.
Optionally, the three-dimensional seismic data interpretation module specifically includes:
the horizon determining submodule is used for performing synthetic seismic recording operation on the three-dimensional seismic processing data and the logging data by adopting three-dimensional seismic data interpretation software to finish the calibration of horizons of mineral-containing target horizons of the seismic data;
and the fracture position determining submodule is used for tracking the three-dimensional seismic processing data of the layer of the ore-containing target layer and determining the fracture position of the ore-containing target layer according to the same-direction axial characteristics of the three-dimensional seismic processing data.
Optionally, the three-dimensional seismic data inversion module specifically includes:
the data processing submodule is used for processing the three-dimensional seismic data by using three-dimensional seismic data processing software to obtain a seismic prestack gather data volume;
and the impedance inversion submodule is used for performing seismic prestack inversion on the seismic prestack gather data volume by utilizing the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of the ore-bearing target layer.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a method and a system for delineating the extension range of sandstone uranium ore bodies. The method comprises the following steps: logging in an industrial hole to obtain logging data, geological stratification and lithology histograms; coring a target layer containing ores in an industrial hole, measuring the longitudinal wave velocity, the transverse wave velocity and the density of a rock sample, calculating the longitudinal wave impedance and the transverse wave impedance, and manufacturing a rock physical quantity plate for distinguishing an ore body from surrounding rocks; acquiring three-dimensional seismic data around an industrial hole, finishing data processing and interpretation, acquiring longitudinal wave impedance distribution and transverse wave impedance distribution of a target layer through seismic prestack inversion on the basis, and circling the distribution range of ore-containing rocks on the longitudinal wave impedance distribution diagram and the transverse wave impedance distribution diagram according to a rock physical quantity plate to acquire the extension range of sandstone uranium ore bodies. The method provides a technical method for delineating the extension range of the sandstone uranium ore body, is green and environment-friendly, and accelerates the exploration period of the sandstone uranium ore.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a flow chart of a method for delineating the extension range of a sandstone uranium ore body provided by the invention.
Detailed Description
The invention aims to provide a method and a system for delineating the extension range of a sandstone uranium ore body, so as to realize the delineation of the extension range of the sandstone uranium ore body without arranging a large number of drill holes.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
In order to solve the technical problems, the invention provides that after an industrial hole is found, ground exploration work, namely three-dimensional seismic exploration, is deployed at the periphery to replace drilling and quickly define the extension range of sandstone uranium ore bodies, so that the purpose is realized, the damage to the earth surface and the underground is reduced, and the requirement of green exploration is met.
As shown in fig. 1, the invention provides a method for delineating the extension range of sandstone uranium ore body, which comprises the following steps:
101, performing logging and logging operations on an industrial hole to obtain logging data and logging data; the well logging data includes sound waves and densities at different depths of the industrial hole, and the well logging data includes geological stratification and lithology histograms of the industrial hole.
Specifically, the logging data in step 101 is collected in the well by the logging tool, and the logging data is collected by sliding the parameter probe of the logging tool downhole, and measuring one data every 0.05 m.
The logging data in step 101 is that geologists take cores according to the drilling, determine geological stratification according to regional stratum characteristics by observing and describing the lithology of each section of core, and draw a lithology histogram by using software.
And 102, sampling in an ore-containing target layer of the industrial hole to obtain a plurality of ore-containing samples and a plurality of surrounding rock samples.
The sampling in the step 102 is the sampling of the drill core, the sampling depth range covers the target layer containing the ore, the sampling depth interval is uniform, the ore body is subjected to encryption sampling, and the number of the ore-containing samples and the number of the surrounding rock samples are not less than 10 respectively.
And 103, manufacturing a rock physical quantity plate for distinguishing ore bodies and surrounding rocks according to the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample.
103, according to the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample, manufacturing a rock physical quantity plate for distinguishing an ore body from surrounding rocks, which specifically comprises the following steps: respectively measuring the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample by adopting an ultrasonic pulse transmission method; measuring the density of each ore-containing sample and each surrounding rock sample by adopting a volume method; respectively multiplying the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample with the density of each ore-containing sample and each surrounding rock sample to obtain the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample; establishing a coordinate system by taking transverse wave impedance as an abscissa axis of the rock physical quantity plate and longitudinal wave impedance as an ordinate axis of the rock physical quantity plate; respectively projecting intersection points of longitudinal wave impedance and transverse wave impedance of each ore-containing sample and each surrounding rock sample to the coordinate system to obtain an intersection graph; and (4) enclosing the area containing the ore sample on the cross plot to obtain a rock physical quantity plate for distinguishing the ore body from the surrounding rock.
Specifically, the wave velocity measurement in step 103 is performed by an elastic parameter measurement method, an ultrasonic pulse transmission method is used to measure the longitudinal wave velocity and the transverse wave velocity of the sample (the ore-containing sample and the surrounding rock sample), and an integral measurement method is used to measure the density of the sample (the ore-containing sample and the surrounding rock sample).
The calculation method of the longitudinal wave impedance and the transverse wave impedance in step 103 is as follows: longitudinal wave impedance is longitudinal wave velocity multiplied by density; shear wave impedance is the shear wave velocity × density.
The manufacturing of the rock physical quantity plate in the step 103 is realized by intersecting longitudinal wave impedance and transverse wave impedance, the abscissa axis of the rock physical quantity plate is transverse wave impedance, the ordinate axis is longitudinal wave impedance, the impedance calculation results of the ore-containing sample and the surrounding rock sample are projected onto an intersection graph, and the areas of the ore-containing sample and the surrounding rock sample are respectively circled, so that the manufacturing of the rock physical quantity plate is completed.
And 104, acquiring three-dimensional seismic data of the area to be surveyed around the industrial hole by using a seismograph.
And step 104, acquiring the three-dimensional seismic data, wherein the main frequency of the detector is not higher than 10Hz, and the seismic source can be a vibroseis or a dynamite.
105, stacking and shifting the three-dimensional seismic data by using seismic data processing software to obtain three-dimensional seismic processing data; the seismic processing data includes pure wave data and production data.
And 106, interpreting the three-dimensional seismic processing data by using the logging data and the logging data to obtain seismic interpretation data of the three-dimensional seismic data, wherein the seismic interpretation data comprise the position and the fracture position of the ore-containing target layer.
106, interpreting the three-dimensional seismic processing data by using the logging data and the logging data to obtain seismic interpretation data of the three-dimensional seismic data, wherein the seismic interpretation data comprise a layer position and a fracture position of a mineral-containing target layer, and the method specifically comprises the following steps: adopting three-dimensional seismic data interpretation software to perform synthetic seismic recording operation on the three-dimensional seismic processing data and the logging data, and completing calibration of the horizon of the mineral-containing target layer of the seismic data; and tracking the three-dimensional seismic processing data of the layer of the ore-containing target layer, and determining the fracture position of the ore-containing target layer according to the homodromous characteristics of the three-dimensional seismic processing data.
And 106, interpreting the seismic data, specifically, by using seismic data interpretation software, synthesizing the logging data into a seismic record, completing calibration of a target layer position of the seismic data, further performing layer position tracking on the seismic data, identifying a fracture position according to the same-direction axis characteristics of the seismic data, and finally interpreting the layer position and the fracture of the target layer on a seismic data body.
And 107, performing seismic prestack inversion on the seismic prestack gather data volume of the three-dimensional seismic data by using the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of the ore-containing target layer.
The seismic prestack inversion in step 107 is to perform seismic prestack inversion on the seismic prestack gather data volume by using seismic prestack inversion software to obtain the longitudinal wave impedance parameter distribution and the transverse wave impedance parameter distribution of the target layer. The method comprises performing synthetic seismic recording operation on well logging data, seismic prestack gather data volume and seismic interpretation data to complete well seismic calibration of seismic data, obtaining well seismic calibrated seismic data, extracting seismic wavelets from well seismic calibrated seismic data, combining seismic data and well logging data, establishing an inversion initial model, performing seismic inversion, calculating to obtain longitudinal wave impedance parameter and transverse wave impedance parameter of a target layer by inversion calculation, specifically, setting longitudinal wave impedance parameter and transverse wave impedance parameter of an initial target layer, establishing an inversion initial model by using the longitudinal wave impedance parameter and transverse wave impedance parameter of the initial target layer, performing convolution operation on the seismic and inversion initial models to obtain forward seismic data, comparing the forward seismic data with the seismic data obtained by measurement, and when the difference between the two is within an allowable threshold range, and outputting the longitudinal wave impedance parameter and the transverse wave impedance parameter, adjusting the longitudinal wave impedance parameter and the transverse wave impedance parameter when the longitudinal wave impedance parameter and the transverse wave impedance parameter are not in the allowable threshold range, and reestablishing the inversion model until the difference value between the forward seismic data and the measured seismic data is in the allowable threshold range.
And 108, utilizing the rock physical quantity plate to circle the extension range of the sandstone uranium ore body according to the longitudinal wave impedance distribution and the transverse wave impedance distribution of the ore-containing target layer.
In step 108, on the results of the longitudinal wave impedance and the transverse wave impedance of the target layer, the distribution range of the sandstone uranium ore body can be defined by using the rock physical quantity plate.
The invention also provides a delineation system for the extension range of sandstone uranium ore bodies, which comprises the following components:
the logging and logging module is used for performing logging and logging operations on the industrial hole to acquire logging data and logging data; the well logging data includes sound waves and densities at different depths of the industrial hole, and the well logging data includes geological stratification and lithology histograms of the industrial hole.
The logging and logging module specifically comprises: the logging submodule is used for measuring sound waves and density of different depths of the industrial hole by using a logging instrument; the drilling coring sub-module is used for performing drilling coring on the industrial hole to obtain a core; the geological stratification determining submodule is used for determining the geological stratification of the industrial hole according to the lithology of each section of the rock core; and the lithology histogram establishing sub-module is used for establishing the lithology histogram according to the lithology of each geological layer of the rock core.
The sample acquisition module is used for sampling in an ore-containing target layer of the industrial hole to obtain a plurality of ore-containing samples and a plurality of surrounding rock samples;
and the rock physical gauge plate establishing module is used for manufacturing the rock physical gauge plate for distinguishing the ore body and the surrounding rock according to the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample.
The rock physical quantity plate establishing module specifically comprises: the wave velocity measuring submodule is used for respectively measuring the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample by adopting an ultrasonic pulse transmission method; the density measurement submodule is used for respectively measuring the density of each ore-containing sample and each surrounding rock sample by adopting a volume method; the impedance calculation submodule is used for multiplying the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample by the density of each ore-containing sample and each surrounding rock sample respectively to obtain the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample; the coordinate system establishing submodule is used for establishing a coordinate system by taking transverse wave impedance as an abscissa axis of the rock physical quantity plate and longitudinal wave impedance as an ordinate axis of the rock physical quantity plate; the intersection point projection submodule is used for projecting intersection points of longitudinal wave impedance and transverse wave impedance of each ore-containing sample and each surrounding rock sample to the coordinate system respectively to obtain an intersection graph; and the mineral-containing rock impedance distribution range delineating sub-module is used for delineating the region of the mineral-containing sample on the cross plot to obtain a rock physical quantity plate for distinguishing the ore body from the surrounding rock.
The three-dimensional seismic data acquisition module is used for acquiring three-dimensional seismic data of the area to be surveyed around the industrial hole through a seismograph;
the three-dimensional seismic data processing module is used for carrying out stack processing and migration processing on the three-dimensional seismic data by utilizing seismic data processing software to obtain three-dimensional seismic processing data; the seismic processing data comprises pure wave data and achievement data;
and the three-dimensional seismic data interpretation module is used for interpreting the three-dimensional seismic processing data by using the logging data and the logging data to obtain seismic interpretation data of the three-dimensional seismic data, wherein the seismic interpretation data comprise the horizon and the fracture position of the ore-containing target layer.
The three-dimensional seismic data interpretation module specifically comprises: the horizon determining submodule is used for performing synthetic seismic recording operation on the three-dimensional seismic processing data and the logging data by adopting three-dimensional seismic data interpretation software to finish the calibration of horizons of mineral-containing target horizons of the seismic data; and the fracture position determining submodule is used for tracking the three-dimensional seismic processing data of the layer of the ore-containing target layer and determining the fracture position of the ore-containing target layer according to the same-direction axial characteristics of the three-dimensional seismic processing data.
And the three-dimensional seismic data inversion module is used for performing seismic prestack inversion on a seismic prestack gather data volume of the three-dimensional seismic data by using the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of a mineral-containing target layer.
The three-dimensional seismic data inversion module specifically comprises: the data processing submodule is used for processing the three-dimensional seismic data by using three-dimensional seismic data processing software to obtain a seismic prestack gather data volume and obtain a seismic prestack gather data volume; and the impedance inversion submodule is used for performing seismic prestack inversion on the seismic prestack gather data volume by utilizing the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of the ore-bearing target layer.
And the delineating module is used for delineating the extension range of the sandstone uranium ore body by utilizing the rock physical quantity plate according to the longitudinal wave impedance distribution and the transverse wave impedance distribution of the ore-bearing target layer.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a method and a system for delineating the extension range of sandstone uranium ore bodies. The method comprises the following steps: logging in an industrial hole to obtain logging data, geological stratification and lithology histograms; coring a target layer containing ores in an industrial hole, measuring the longitudinal wave velocity, the transverse wave velocity and the density of a rock sample, calculating the longitudinal wave impedance and the transverse wave impedance, and manufacturing a rock physical quantity plate for distinguishing an ore body from surrounding rocks; acquiring three-dimensional seismic data around an industrial hole, finishing data processing and interpretation, acquiring longitudinal wave impedance distribution and transverse wave impedance distribution of a target layer through seismic prestack inversion on the basis, and circling the distribution range of ore-containing rocks on the longitudinal wave impedance distribution diagram and the transverse wave impedance distribution diagram according to a rock physical quantity plate to acquire the extension range of sandstone uranium ore bodies. The method provides a technical method for delineating the extension range of the sandstone uranium ore body, is green and environment-friendly, and accelerates the exploration period of the sandstone uranium ore.
The technical means of logging, rock sample measurement, three-dimensional seismic data acquisition, processing, interpretation, inversion and the like are all general technical means in the field, and various changes can be made on the premise of not departing from the purpose of the invention. As long as three-dimensional seismic data, logging data and rock sample elastic data are comprehensively utilized, the extension range of the sandstone uranium ore body can be defined by adopting the prior art commonly used in the field according to the scheme of the invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation manner of the present invention are explained by applying specific examples, the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof, the described embodiments are only a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.
Claims (10)
1. The method for delineating the extension range of the sandstone uranium ore body is characterized by comprising the following steps of:
carrying out logging and logging operations on the industrial hole to obtain logging data and logging data; the logging data comprises sound waves and densities at different depths of the industrial hole, and the logging data comprises geological stratification and lithology histograms of the industrial hole;
sampling an ore-containing target layer of the industrial hole to obtain a plurality of ore-containing samples and a plurality of surrounding rock samples;
according to the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample, manufacturing a rock physical quantity plate for distinguishing an ore body from surrounding rocks;
acquiring three-dimensional seismic data of a region to be surveyed around the industrial hole by using a seismograph;
performing stack processing and migration processing on the three-dimensional seismic data by using seismic data processing software to obtain three-dimensional seismic processing data; the seismic processing data comprises pure wave data and achievement data;
interpreting the three-dimensional seismic processing data by using the logging data and the logging data to obtain seismic interpretation data of the three-dimensional seismic data; the seismic interpretation data comprises horizons and fracture positions of the ore-bearing target layer;
performing seismic prestack inversion on a seismic prestack gather data volume of the three-dimensional seismic data by using the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of a mineral-containing target layer;
and according to the longitudinal wave impedance distribution and the transverse wave impedance distribution of the ore-bearing target layer, the extension range of the sandstone uranium ore body is defined by the rock physical quantity plate.
2. The method for delineating the extension range of sandstone uranium ore bodies according to claim 1, wherein the operations of logging and logging are performed on an industrial hole to obtain logging data and logging data, and specifically comprises:
measuring sound waves and density at different depths of the industrial hole by using a logging instrument;
drilling and coring are carried out on the industrial hole to obtain a rock core;
determining geological stratification of the industrial hole according to lithology of each section of the rock core;
a lithology histogram is created from the lithology of each geological layer of the core.
3. The method for delineating the extension range of sandstone uranium ore body according to claim 1, wherein the manufacturing of the petrophysical gauge slab for distinguishing the ore body from the surrounding rock according to the compressional wave impedance and the shear wave impedance of each ore-containing sample and each surrounding rock sample comprises:
respectively measuring the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample by adopting an ultrasonic pulse transmission method;
measuring the density of each ore-containing sample and each surrounding rock sample by adopting a volume method;
respectively multiplying the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample with the density of each ore-containing sample and each surrounding rock sample to obtain the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample;
establishing a coordinate system by taking transverse wave impedance as an abscissa axis of the rock physical quantity plate and longitudinal wave impedance as an ordinate axis of the rock physical quantity plate;
respectively projecting intersection points of longitudinal wave impedance and transverse wave impedance of each ore-containing sample and each surrounding rock sample to the coordinate system to obtain an intersection graph;
and (4) enclosing the area containing the ore sample and the area of the surrounding rock sample on the cross plot to obtain a rock physical quantity plate for distinguishing the ore body from the surrounding rock.
4. The method for delineating the extension range of sandstone uranium ore bodies according to claim 1, wherein the three-dimensional seismic processing data is interpreted by using the logging data and the logging data to obtain seismic interpretation data of the three-dimensional seismic data, wherein the seismic interpretation data comprise horizons and fracture positions of ore-bearing target layers, and specifically comprises:
adopting three-dimensional seismic data interpretation software to perform synthetic seismic recording operation on the three-dimensional seismic processing data and the logging data, and completing calibration of the horizon of the mineral-containing target layer of the seismic data;
and tracking the three-dimensional seismic processing data of the layer of the ore-containing target layer, and determining the fracture position of the ore-containing target layer according to the homodromous characteristics of the three-dimensional seismic processing data.
5. The method for delineating the extension range of sandstone uranium ore bodies according to claim 1, wherein the seismic prestack inversion is performed on a seismic prestack gather data body of three-dimensional seismic data by using the logging data, the logging data and the seismic interpretation data to obtain a longitudinal wave impedance distribution and a transverse wave impedance distribution of an ore-bearing target layer, and specifically comprises:
processing the three-dimensional seismic data by using three-dimensional seismic data processing software to obtain a seismic prestack gather data volume;
and performing seismic prestack inversion on the seismic prestack gather data volume by using the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of the ore-bearing target layer.
6. A delineation system for sandstone uranium ore body extension, the delineation system comprising:
the logging and logging module is used for performing logging and logging operations on the industrial hole to acquire logging data and logging data; the logging data comprises sound waves and densities at different depths of the industrial hole, and the logging data comprises geological stratification and lithology histograms of the industrial hole;
the sample acquisition module is used for sampling in an ore-containing target layer of the industrial hole to obtain a plurality of ore-containing samples and a plurality of surrounding rock samples;
the rock physical gauge plate establishing module is used for manufacturing a rock physical gauge plate for distinguishing ore bodies and surrounding rocks according to the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample;
the three-dimensional seismic data acquisition module is used for acquiring three-dimensional seismic data of the area to be surveyed around the industrial hole through a seismograph;
the three-dimensional seismic data processing module is used for carrying out stack processing and migration processing on the three-dimensional seismic data by utilizing seismic data processing software to obtain three-dimensional seismic processing data; the seismic processing data comprises pure wave data and achievement data;
the three-dimensional seismic data interpretation module is used for interpreting the three-dimensional seismic processing data by using the logging data and the logging data to obtain seismic interpretation data of the three-dimensional seismic data, and the seismic interpretation data comprise a horizon and a fracture position of a mineral-containing target layer;
the three-dimensional seismic data inversion module is used for performing seismic prestack inversion on a seismic prestack gather data volume of the three-dimensional seismic data by using the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of a mineral-containing target layer;
and the delineating module is used for delineating the extension range of the sandstone uranium ore body by utilizing the rock physical quantity plate according to the longitudinal wave impedance distribution and the transverse wave impedance distribution of the ore-bearing target layer.
7. The delineation system of sandstone uranium ore body extension according to claim 6, wherein the logging and logging module specifically comprises:
the logging submodule is used for measuring sound waves and density of different depths of the industrial hole by using a logging instrument;
the drilling coring sub-module is used for performing drilling coring on the industrial hole to obtain a core;
the geological stratification determining submodule is used for determining the geological stratification of the industrial hole according to the lithology of each section of the rock core;
and the lithology histogram establishing sub-module is used for establishing the lithology histogram according to the lithology of each geological layer of the rock core.
8. The delineation system of sandstone uranium ore body extension according to claim 6, wherein the petrophysical quantity plate establishing module specifically comprises:
the wave velocity measuring submodule is used for respectively measuring the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample by adopting an ultrasonic pulse transmission method;
the density measurement submodule is used for respectively measuring the density of each ore-containing sample and each surrounding rock sample by adopting a volume method;
the impedance calculation submodule is used for multiplying the longitudinal wave velocity and the transverse wave velocity of each ore-containing sample and each surrounding rock sample by the density of each ore-containing sample and each surrounding rock sample respectively to obtain the longitudinal wave impedance and the transverse wave impedance of each ore-containing sample and each surrounding rock sample;
the coordinate system establishing submodule is used for establishing a coordinate system by taking transverse wave impedance as an abscissa axis of the rock physical quantity plate and longitudinal wave impedance as an ordinate axis of the rock physical quantity plate;
the intersection point projection submodule is used for projecting intersection points of longitudinal wave impedance and transverse wave impedance of each ore-containing sample and each surrounding rock sample to the coordinate system respectively to obtain an intersection graph;
and the mineral-containing rock impedance distribution range delineating sub-module is used for delineating the region of the mineral-containing sample on the cross plot to obtain a rock physical quantity plate for distinguishing the ore body from the surrounding rock.
9. The delineation system of sandstone uranium ore body extension according to claim 6, wherein the three-dimensional seismic data interpretation module specifically comprises:
the horizon determining submodule is used for performing synthetic seismic recording operation on the three-dimensional seismic processing data and the logging data by adopting three-dimensional seismic data interpretation software to finish the calibration of horizons of mineral-containing target horizons of the seismic data;
and the fracture position determining submodule is used for tracking the three-dimensional seismic processing data of the layer of the ore-containing target layer and determining the fracture position of the ore-containing target layer according to the same-direction axial characteristics of the three-dimensional seismic processing data.
10. The delineation system of sandstone uranium ore body extension according to claim 6, wherein the three-dimensional seismic data inversion module specifically comprises:
the data processing submodule is used for processing the three-dimensional seismic data by using three-dimensional seismic data processing software to obtain a seismic prestack gather data volume;
and the impedance inversion submodule is used for performing seismic prestack inversion on the seismic prestack gather data volume by utilizing the logging data, the logging data and the seismic interpretation data to obtain longitudinal wave impedance distribution and transverse wave impedance distribution of the ore-bearing target layer.
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