CN112577875A - Efficient detection technology for multiple native pores of carbonate rock - Google Patents
Efficient detection technology for multiple native pores of carbonate rock Download PDFInfo
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- CN112577875A CN112577875A CN202011391396.9A CN202011391396A CN112577875A CN 112577875 A CN112577875 A CN 112577875A CN 202011391396 A CN202011391396 A CN 202011391396A CN 112577875 A CN112577875 A CN 112577875A
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- 239000011435 rock Substances 0.000 title claims abstract description 168
- 239000011148 porous material Substances 0.000 title claims abstract description 160
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 99
- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 28
- 239000013078 crystal Substances 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims abstract description 6
- 235000019738 Limestone Nutrition 0.000 claims description 17
- 239000006028 limestone Substances 0.000 claims description 17
- 238000005070 sampling Methods 0.000 claims description 17
- 238000005553 drilling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 230000008021 deposition Effects 0.000 claims description 11
- 238000004458 analytical method Methods 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 10
- 239000013049 sediment Substances 0.000 claims description 10
- 238000012795 verification Methods 0.000 claims description 10
- 239000010459 dolomite Substances 0.000 claims description 9
- 229910000514 dolomite Inorganic materials 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000011160 research Methods 0.000 claims description 6
- 208000035126 Facies Diseases 0.000 claims description 5
- 229910001748 carbonate mineral Inorganic materials 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 5
- 210000004884 grey matter Anatomy 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 5
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000000704 physical effect Effects 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 5
- 230000007480 spreading Effects 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract description 3
- 239000011505 plaster Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 description 4
- 238000012876 topography Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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Abstract
The invention relates to the technical field of carbonate rock detection, and discloses a technology for efficiently detecting multiple primary pores of carbonate rock, which comprises the following detection steps: step 1) carrying out on-site reconnaissance on a site, carrying out on-site reconnaissance on the basic situation of a target site, preliminarily mastering the terrain, geological features, soil characteristics, underground rock geophysical conditions and the like of the site, step 2) carrying out blanket type rapid detection on the site, selecting a plurality of routes for carrying out actual measurement on the site, and describing the primary pore distribution characteristics under a high resolution scale. The technology for efficiently detecting various primary pores of the carbonate rock finally determines that the primary pores are closely related to the particle size and the sorting degree and inversely related to the content of the plaster matrix through the relationship between the development of the primary pores in the carbonate rock and the rock properties; the size of the intercrystalline pores has close relation with the size and uniformity of crystal grains; the size of the pores of various organisms is related to the size and arrangement condition of individual organisms.
Description
Technical Field
The invention relates to the technical field of carbonate rock detection, in particular to a high-efficiency detection technology for multiple primary pores of carbonate rock.
Background
The reservoir space of the carbonate reservoir refers to the part of the rock which is not filled with solid matters, is a place where petroleum, natural gas and underground water exist, and can be divided into primary and secondary types according to the composition, the primary reservoir space is also called primary pore and refers to the pore formed simultaneously with the rock, the primary reservoir space mainly comprises primary inter-granular pores, and in addition, intra-granular pores, gap filler or cementing pores, diagenetic cracks and the like are increased along with the increase of the reservoir depth, the diagenetic effect is enhanced, and the primary pores are gradually reduced.
The primary pores are pores formed by deposition, and can generate certain change in the process of diagenesis, the pores are mainly controlled by structural components of carbonate rock, wherein the particle factor is main, the rock can be corroded by underground water to form pores or be filled after the diagenesis process of the carbonate rock and diagenesis, the corroded pores and the primary pores can exist simultaneously, and if the corrosion effect is slight, the pores can still keep the basic original state and can still be classified as the primary pores.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a technology for efficiently detecting various primary pores of carbonate rock, has the advantages of detection from point to surface and then to area, more convenience in detection and the like, and solves the problems of poor detection and inaccurate detection.
(II) technical scheme
In order to realize the detection from point to surface and then to area, the invention provides the following technical scheme: a technology for efficiently detecting multiple primary pores of carbonate rock comprises the following detection steps:
step 1) performing field reconnaissance on a field site:
carrying out on-site reconnaissance on the basic situation of a target site, and preliminarily mastering site topography, geological culture, soil characteristics, underground rock hardness degree and geophysical conditions;
step 2), unfolding a field carpet type rapid detection:
selecting a plurality of routes for carrying out actual measurement work on a field, describing reservoir spreading characteristics in a high-resolution scale, carrying out longitudinal scale enlargement, transversely enlarging a tracking observation range, combining modes of photographing, video recording and the like;
step 3), carrying out grid type grading on the field:
directly digitizing the acquired field reservoir geological data, rock sample test data, rock appearance shape data and surface layer data on the field to form a carbonate outcrop reservoir prototype geological model;
step 4), drilling sampling and analysis verification are carried out in the grade grid:
in view of the hardness degree of the carbonate rock, preferably, nondestructive detection is carried out by using a ground penetrating radar, geological description and rock sampling are carried out, information reflecting aspects such as space characteristics and physical properties of a reservoir stratum is obtained, and research on the heterogeneity of the fine reservoir stratum is carried out;
step 5) carrying out type classification on the carbonate rocks:
calculating geochemical parameters such as average values, standard deviations, variation coefficients and the like of main strata, construction units and rock types in the whole region, calculating and calculating the approximate abundance or abundance of elements of the main strata, rock types and construction units, wherein the approximate abundance or abundance of the elements comprises detecting the content of Ca elements and the content of Mg elements in rock debris samples, and calculating the ratio R of the content of the Ca elements and the content of the Mg elements, namely Ca/Mg; when R is more than 59.4, the carbonate rock is pure limestone; r is more than 10.8 and less than or equal to 59.4, and the carbonate rock is limestone containing dolomite; r is more than 4.7 and less than or equal to 10.8, and the carbonate rock is dolomitic limestone; r is more than 2.6 and less than or equal to 4.7, and the carbonate rock is dolostone; r is more than 1.8 and less than or equal to 2.6, and the carbonate rock is dolostone containing grey matter; r is less than or equal to 1.8, and the carbonate rock is pure dolomite;
step 6) according to the verification result, determining the type of the native pore associated rock:
the primary pores can be generally classified as inter-granular pores, intra-granular pores, inter-granular pores, capsid-masked pores, bio-framework pores, and the like.
Step 7), searching other carbonate rock groups according to site formation reasons:
from the longitude and latitude of the first positioning field, the formation process of the field and whether slight plate-shell movement occurs in the underground of the field are researched by looking up related data, carbonate rock masses belong to high-energy environments on sedimentary facies, such as shoals of continental shelves of coastal and shallow sea, embankment environments, and are also provided with a breach edge slope and local uplift, and reef deposits on a sediment cycle belong to sedimentation in a recession stage.
Further, the step 1) is fully prepared for subsequent geophysical exploration, and reasonable instrument parameters are selected.
Further, the step 2) is used for collecting carbonate rock appearance form data, and rock samples and rock gamma parameters are obtained by combining intensive sampling on the basis of determining lithofacies and sedimentary microfacies spatial distribution characteristics.
Further, in the step 3), the carbonate rock is divided into four grades, namely, more primary pores, less primary pores and no primary pores, so that later-stage detection is facilitated.
Further, in the step 5), the data of various parameters of the rock sample, the analysis data of various elements of the rock sample, various calculated and counted geochemical parameters and the like are stored in a regional chemical exploration database so as to be researched and used at any time.
Further, the step 6) inter-granular pores; means that the particle content is predominant in the rock, forming a particle supporting structure, and the part between the particles which is not filled with mortar or cement; intra-granular pores: refers to the pores within the carbonate particles; it is the existing pores before the deposition of the particles, usually referred to as biological cavity pores, biological skeleton pores: the skeleton pores formed by the in-situ growing colony reef-building organisms are pointed; intercrystalline pores: is the pores formed between carbonate mineral crystals, the biological drilled pores: refers to pores formed by drilling holes in the sediment by certain organisms during deposition into diagenetic rock; shrinkage porosity: refers to the pores formed by the shrinkage of the deposit.
(III) advantageous effects
Compared with the prior art, the invention provides a technology for efficiently detecting multiple primary pores of carbonate rock, which has the following beneficial effects:
1. according to the efficient detection technology for the multiple native pores of the carbonate rock, the specific site or area is found by detecting the multiple native pores of the carbonate rock and conveniently and accurately positioning and accurately evaluating the method, the types of the carbonate rock are analyzed in a targeted manner in steps, the native pore distribution communities in the area are accurately positioned, point positions are reasonably arranged for sampling, the area is rapidly searched by combining the longitude and latitude of the site and geological history documents, and the distribution positions of other native pores are conveniently and rapidly found.
2. The technology for efficiently detecting various native pores of the carbonate rock has the advantages that the development of the native pores in the carbonate rock is closely related to the lithology of the original rock, for example, the most common inter-granular pores develop in various granular limestone rocks, are similar to sandstone, and the sizes of the porosity and the permeability are closely related to the size and the sorting degree of particles and are in inverse proportion to the content of a plaster matrix; the size of the intercrystalline pores has close relation with the size and uniformity of crystal grains; the size of the pores of various organisms is related to the size and arrangement condition of individual organisms.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: a technology for efficiently detecting multiple primary pores of carbonate rock comprises the following detection steps:
step 1) performing field reconnaissance on a field site:
carrying out on-site reconnaissance on the basic situation of a target site, and preliminarily mastering site topography, geological culture, soil characteristics, underground rock hardness degree and geophysical conditions;
step 2), unfolding a field carpet type rapid detection:
selecting a plurality of routes for carrying out actual measurement work on a field, describing reservoir spreading characteristics in a high-resolution scale, carrying out longitudinal scale enlargement, transversely enlarging a tracking observation range, combining modes of photographing, video recording and the like;
step 3), carrying out grid type grading on the field:
directly digitizing the acquired field reservoir geological data, rock sample test data, rock appearance shape data and surface layer data on the field to form a carbonate outcrop reservoir prototype geological model;
step 4), drilling sampling and analysis verification are carried out in the grade grid:
in view of the hardness degree of the carbonate rock, preferably, nondestructive detection is carried out by using a ground penetrating radar, geological description and rock sampling are carried out, information reflecting aspects such as space characteristics and physical properties of a reservoir stratum is obtained, and research on the heterogeneity of the fine reservoir stratum is carried out;
step 5) carrying out type classification on the carbonate rocks:
calculating geochemical parameters such as average values, standard deviations, variation coefficients and the like of main strata, construction units and rock types in the whole region, calculating and calculating the approximate abundance or abundance of elements of the main strata, rock types and construction units, wherein the approximate abundance or abundance of the elements comprises detecting the content of Ca elements and the content of Mg elements in rock debris samples, and calculating the ratio R of the content of the Ca elements and the content of the Mg elements, namely Ca/Mg; when R is more than 59.4, the carbonate rock is pure limestone; r ═ 59.4, the carbonate rock is dolomite-containing limestone; r ═ 10.8, the carbonate rock is dolomitic limestone; r ═ 4.7, the carbonate rock is dolostone; r is 2.6, and the carbonate rock is dolostone containing grey matter; r is less than or equal to 1.8, and the carbonate rock is pure dolomite;
step 6) according to the verification result, determining the type of the native pore associated rock:
the primary pores can be generally divided into inter-granular pores, intra-granular pores, inter-granular pores, shell-shielding pores, biological skeleton pores, and the like;
step 7), searching other carbonate rock groups according to site formation reasons:
from the longitude and latitude of the first positioning field, the formation process of the field and whether slight plate-shell movement occurs in the underground of the field are researched by looking up related data, carbonate rock masses belong to high-energy environments on sedimentary facies, such as shoals of continental shelves of coastal and shallow sea, embankment environments, and are also provided with a breach edge slope and local uplift, and reef deposits on a sediment cycle belong to sedimentation in a recession stage.
Further, the step 1) is fully prepared for subsequent geophysical exploration, and reasonable instrument parameters are selected.
Further, the step 2) is used for collecting carbonate rock appearance form data, and rock samples and rock gamma parameters are obtained by combining intensive sampling on the basis of determining lithofacies and sedimentary microfacies spatial distribution characteristics.
Further, in the step 3), the carbonate rock is divided into four grades, namely, more primary pores, less primary pores and no primary pores, so that later-stage detection is facilitated.
Further, in the step 5), the data of various parameters of the rock sample, the analysis data of various elements of the rock sample, various calculated and counted geochemical parameters and the like are stored in a regional chemical exploration database so as to be researched and used at any time.
Further, the step 6) inter-granular pores; means that the particle content is predominant in the rock, forming a particle supporting structure, and the part between the particles which is not filled with mortar or cement; intra-granular pores: refers to the pores within the carbonate particles; it is the existing pores before the deposition of the particles, usually referred to as biological cavity pores, biological skeleton pores: the skeleton pores formed by the in-situ growing colony reef-building organisms are pointed; intercrystalline pores: is the pores formed between the carbonate mineral crystals; biological drilling of pores: refers to pores formed by drilling holes in the sediment by certain organisms during deposition into diagenetic rock; shrinkage porosity: refers to the pores formed by the shrinkage of the deposit.
Example two: a technology for efficiently detecting multiple primary pores of carbonate rock comprises the following detection steps:
step 1) performing field reconnaissance on a field site:
carrying out on-site reconnaissance on the basic situation of a target site, and preliminarily mastering site topography, geological culture, soil characteristics, underground rock hardness degree and geophysical conditions;
step 2), unfolding a field carpet type rapid detection:
selecting a plurality of routes for carrying out actual measurement work on a field, describing reservoir spreading characteristics in a high-resolution scale, carrying out longitudinal scale enlargement, transversely enlarging a tracking observation range, combining modes of photographing, video recording and the like;
step 3), carrying out grid type grading on the field:
directly digitizing the acquired field reservoir geological data, rock sample test data, rock appearance shape data and surface layer data on the field to form a carbonate outcrop reservoir prototype geological model;
step 4), drilling sampling and analysis verification are carried out in the grade grid:
in view of the hardness degree of the carbonate rock, preferably, nondestructive detection is carried out by using a ground penetrating radar, geological description and rock sampling are carried out, information reflecting aspects such as space characteristics and physical properties of a reservoir stratum is obtained, and research on the heterogeneity of the fine reservoir stratum is carried out;
step 5) carrying out type classification on the carbonate rocks:
the geochemical parameters of main strata, construction units, magma rocks and the like in the whole region, such as average values, standard deviations, variation coefficients and the like, are calculated, and the approximate abundance or abundance of elements of the main strata, the rock types and the construction units is calculated and counted, wherein the approximate abundance or abundance of the elements comprises the steps of detecting the content of Ca elements and the content of Mg elements in rock debris samples, and calculating the ratio R of the content of the Ca elements and the content of the Mg elements to be Ca/Mg; when R is more than 59.4, the carbonate rock is pure limestone; r ═ 10.9, the carbonate rock is dolomite-containing limestone; r ═ 4.8, the carbonate rock is dolomitic limestone; r is 2.7, and the carbonate rock is dolostone; r ═ 1.9 the carbonate rock was dolomitic rock containing gray matter; r is less than or equal to 1.8, and the carbonate rock is pure dolomite;
step 6) according to the verification result, determining the type of the native pore associated rock:
the primary pores can be generally divided into inter-granular pores, intra-granular pores, inter-granular pores, shell-shielding pores, biological skeleton pores, and the like;
step 7), searching other carbonate rock groups according to site formation reasons:
from the longitude and latitude of the first positioning field, the formation process of the field and whether slight plate-shell movement occurs in the underground of the field are researched by looking up related data, carbonate rock masses belong to high-energy environments on sedimentary facies, such as shoals of continental shelves of coastal and shallow sea, embankment environments, and are also provided with a breach edge slope and local uplift, and reef deposits on a sediment cycle belong to sedimentation in a recession stage.
Further, the step 1) is fully prepared for subsequent geophysical exploration, and reasonable instrument parameters are selected.
Further, the step 2) is used for collecting carbonate rock appearance form data, and rock samples and rock gamma parameters are obtained by combining intensive sampling on the basis of determining lithofacies and sedimentary microfacies spatial distribution characteristics.
Further, in the step 3), the carbonate rock is divided into four grades, namely, more primary pores, less primary pores and no primary pores, so that later-stage detection is facilitated.
Further, in the step 5), the data of various parameters of the rock sample, the analysis data of various elements of the rock sample, various calculated and counted geochemical parameters and the like are stored in a regional chemical exploration database so as to be researched and used at any time.
Further, the step 6) inter-granular pores; means that the particle content is predominant in the rock, forming a particle supporting structure, and the part between the particles which is not filled with mortar or cement; intra-granular pores: refers to the pores within the carbonate particles; it is the existing pores before the deposition of the particles, usually referred to as biological cavity pores, biological skeleton pores: the skeleton pores formed by the in-situ growing colony reef-building organisms are pointed; intercrystalline pores: is the pores formed between the carbonate mineral crystals; biological drilling of pores: refers to pores formed by drilling holes in the sediment by certain organisms during deposition into diagenetic rock; shrinkage porosity: refers to the pores formed by the shrinkage of the deposit.
Example three: a technology for efficiently detecting multiple primary pores of carbonate rock comprises the following detection steps:
step 1) performing field reconnaissance on a field site:
carrying out on-site reconnaissance on the basic situation of a target site, and preliminarily mastering site topography, geological culture, soil characteristics, underground rock hardness degree and geophysical conditions;
step 2), unfolding a field carpet type rapid detection:
selecting a plurality of routes for carrying out actual measurement work on a field, describing reservoir spreading characteristics in a high-resolution scale, carrying out longitudinal scale enlargement, transversely enlarging a tracking observation range, combining modes of photographing, video recording and the like;
step 3), carrying out grid type grading on the field:
directly digitizing the acquired field reservoir geological data, rock sample test data, rock appearance morphological data and surface layer data on the field to form a carbonate outcrop reservoir prototype geological model:
step 4), drilling sampling and analysis verification are carried out in the grade grid:
in view of the hardness degree of the carbonate rock, preferably, nondestructive detection is carried out by using a ground penetrating radar, geological description and rock sampling are carried out, information reflecting aspects such as space characteristics and physical properties of a reservoir stratum is obtained, and research on the heterogeneity of the fine reservoir stratum is carried out;
step 5) carrying out type classification on the carbonate rocks:
calculating geochemical parameters such as average values, standard deviations, variation coefficients and the like of main strata, construction units and rock types in the whole region, calculating and calculating the approximate abundance or abundance of elements of the main strata, rock types and construction units, wherein the approximate abundance or abundance of the elements comprises detecting the content of Ca elements and the content of Mg elements in rock debris samples, and calculating the ratio R of the content of the Ca elements and the content of the Mg elements, namely Ca/Mg; when R is more than 59.4, the carbonate rock is pure limestone; r-35.15, the carbonate rock being dolomitic limestone; r ═ 7.8, the carbonate rock is dolomitic limestone; r ═ 3.7, the carbonate rock is dolostone; r is 2.25, and the carbonate rock is dolostone containing grey matter; r is less than or equal to 1.8, and the carbonate rock is pure dolomite;
step 6) according to the verification result, determining the type of the native pore associated rock:
the primary pores can be generally divided into inter-granular pores, intra-granular pores, inter-granular pores, shell-shielding pores, biological skeleton pores, and the like;
step 7), searching other carbonate rock groups according to site formation reasons:
from the longitude and latitude of the first positioning field, the formation process of the field and whether slight plate-shell movement occurs in the underground of the field are researched by looking up related data, carbonate rock masses belong to high-energy environments on sedimentary facies, such as shoals of continental shelves of coastal and shallow sea, embankment environments, and are also provided with a breach edge slope and local uplift, and reef deposits on a sediment cycle belong to sedimentation in a recession stage.
Further, the step 1) is fully prepared for subsequent geophysical exploration, and reasonable instrument parameters are selected.
Further, the step 2) is used for collecting carbonate rock appearance form data, and rock samples and rock gamma parameters are obtained by combining intensive sampling on the basis of determining lithofacies and sedimentary microfacies spatial distribution characteristics.
Further, in the step 3), the carbonate rock is divided into four grades, namely, more primary pores, less primary pores and no primary pores, so that later-stage detection is facilitated.
Further, in the step 5), the data of various parameters of the rock sample, the analysis data of various elements of the rock sample, various calculated and counted geochemical parameters and the like are stored in a regional chemical exploration database so as to be researched and used at any time.
Further, the step 6) inter-granular pores; means that the particle content is predominant in the rock, forming a particle supporting structure, and the part between the particles which is not filled with mortar or cement; intra-granular pores: refers to the pores within the carbonate particles; it is the existing pores before the deposition of the particles, usually referred to as biological cavity pores, biological skeleton pores: the skeleton pores formed by the in-situ growing colony reef-building organisms are pointed; intercrystalline pores: is the pores formed between carbonate mineral crystals, the biological drilled pores: refers to pores formed by drilling holes in the sediment by certain organisms during deposition into diagenetic rock; shrinkage porosity: refers to the pores formed by the shrinkage of the deposit.
The invention has the beneficial effects that: the technology for efficiently detecting the multiple kinds of native pores of the carbonate rock finds a specific site or area by detecting the multiple kinds of native pores of the carbonate rock and conveniently, accurately positioning and accurately evaluating the method, has the steps of analyzing the types of the carbonate rock in a targeted manner, accurately positioning a native pore distribution community in the area, reasonably arranging point positions for sampling, quickly searching the area by combining field longitude and latitude and geological history documents, conveniently and quickly finding the distribution positions of other native pores, has close relation with the lithology of the original rock by the development of the native pores in the carbonate rock, such as the most common inter-granular pores, develops in various granular limestone rocks, is similar to sandstone, has close relation with the size of the granules and the separation degree, and is in inverse proportion to the content of plaster matrix; the size of the intercrystalline pores has close relation with the size and uniformity of crystal grains; the size of the pores of various organisms is related to the size and arrangement condition of individual organisms.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A technology for efficiently detecting multiple primary pores of carbonate rock is characterized by comprising the following detection steps:
step 1) performing field reconnaissance on a field site:
carrying out on-site reconnaissance on the basic situation of a target site, and preliminarily mastering site terrain, geological features, soil characteristics, underground rock hardness and geophysical conditions;
step 2), unfolding a field carpet type rapid detection:
selecting a plurality of routes for carrying out actual measurement work on a field, describing reservoir spreading characteristics in a high-resolution scale, carrying out longitudinal scale enlargement, transversely enlarging a tracking observation range, combining modes of photographing, video recording and the like;
step 3), carrying out grid type grading on the field:
directly digitizing the acquired field reservoir geological data, rock sample test data, rock appearance shape data and surface layer data on the field to form a carbonate outcrop reservoir prototype geological model;
step 4), drilling sampling and analysis verification are carried out in the grade grid:
in view of the hardness degree of the carbonate rock, preferably, nondestructive detection is carried out by using a ground penetrating radar, geological description and rock sampling are carried out, information reflecting aspects such as space characteristics and physical properties of a reservoir stratum is obtained, and research on the heterogeneity of the fine reservoir stratum is carried out;
step 5) carrying out type classification on the carbonate rocks:
calculating geochemical parameters such as average values, standard deviations, variation coefficients and the like of main strata, construction units and rock types in the whole region, calculating and calculating the approximate abundance or abundance of elements of the main strata, rock types and construction units, wherein the approximate abundance or abundance of the elements comprises detecting the content of Ca elements and the content of Mg elements in rock debris samples, and calculating the ratio R of the content of the Ca elements and the content of the Mg elements, namely Ca/Mg; when R is more than 59.4, the carbonate rock is pure limestone; r is more than 10.8 and less than or equal to 59.4, and the carbonate rock is limestone containing dolomite; r is more than 4.7 and less than or equal to 10.8, and the carbonate rock is dolomitic limestone; r is more than 2.6 and less than or equal to 4.7, and the carbonate rock is dolostone; r is more than 1.8 and less than or equal to 2.6, and the carbonate rock is dolostone containing grey matter; r is less than or equal to 1.8, and the carbonate rock is pure dolomite;
step 6) according to the verification result, determining the type of the native pore associated rock:
the primary pores can be generally divided into inter-granular pores, intra-granular pores, inter-granular pores, shell-shielding pores, biological skeleton pores, and the like;
step 7), searching other carbonate rock groups according to site formation reasons:
from the longitude and latitude of the first positioning field, the formation process of the field and whether slight plate-shell movement occurs in the underground of the field are researched by looking up related data, carbonate rock masses belong to high-energy environments on sedimentary facies, such as shoals of continental shelves of coastal and shallow sea, embankment environments, and are also provided with a breach edge slope and local uplift, and reef deposits on a sediment cycle belong to sedimentation in a recession stage.
2. The technique for efficiently detecting multiple primary pores of carbonate rock according to claim 1, wherein the step 1) is fully prepared for the subsequent geophysical detection work and reasonable instrument parameters are selected.
3. The technique as claimed in claim 1, wherein the step 2) is used for collecting appearance morphology data of the carbonate rock, and the rock sample and the rock gamma parameter are obtained by combining intensive sampling on the basis of defining the spatial distribution characteristics of lithofacies and sedimentary microfacies.
4. The technique as claimed in claim 1, wherein in step 3), the carbonate rock is classified into four grades including more primary pores, less primary pores and no primary pores, so as to facilitate later detection.
5. The technique as claimed in claim 1, wherein the step 5) stores the parameters of the rock sample, the analysis data of the elements of the rock sample, and the geochemical parameters of calculation and statistics into the regionalized database for research and use at any time.
6. The efficient detection technique for multiple primary pores of carbonate rock according to claim 1, wherein the step 6) is carried out on inter-granular pores; means that the particle content is predominant in the rock, forming a particle supporting structure, and the part between the particles which is not filled with mortar or cement; intra-granular pores: refers to the pores within the carbonate particles; it is the existing pores before the deposition of the particles, usually referred to as biological cavity pores, biological skeleton pores: the skeleton pores formed by the in-situ growing colony reef-building organisms are pointed; intercrystalline pores: is the pores formed between the carbonate mineral crystals; biological drilling of pores: refers to pores formed by drilling holes in the sediment by certain organisms during deposition into diagenetic rock; shrinkage porosity: refers to the pores formed by the shrinkage of the deposit.
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