CN113720991B - Method, device, equipment and storage medium for detecting mineral composition in sedimentary rock - Google Patents
Method, device, equipment and storage medium for detecting mineral composition in sedimentary rock Download PDFInfo
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- CN113720991B CN113720991B CN202011281900.XA CN202011281900A CN113720991B CN 113720991 B CN113720991 B CN 113720991B CN 202011281900 A CN202011281900 A CN 202011281900A CN 113720991 B CN113720991 B CN 113720991B
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- 239000011435 rock Substances 0.000 title claims abstract description 410
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 161
- 239000011707 mineral Substances 0.000 title claims abstract description 161
- 239000000203 mixture Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000000126 substance Substances 0.000 claims abstract description 25
- 239000011777 magnesium Substances 0.000 claims description 48
- 229910052900 illite Inorganic materials 0.000 claims description 46
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 claims description 46
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 42
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 42
- 229910052602 gypsum Inorganic materials 0.000 claims description 39
- 239000010440 gypsum Substances 0.000 claims description 39
- 229910052656 albite Inorganic materials 0.000 claims description 38
- 239000010445 mica Substances 0.000 claims description 33
- 229910052618 mica group Inorganic materials 0.000 claims description 33
- 229910052749 magnesium Inorganic materials 0.000 claims description 32
- 229910052683 pyrite Inorganic materials 0.000 claims description 30
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 30
- 239000011028 pyrite Substances 0.000 claims description 30
- 239000011734 sodium Substances 0.000 claims description 30
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 29
- 229910000514 dolomite Inorganic materials 0.000 claims description 28
- 239000010459 dolomite Substances 0.000 claims description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- 229910021532 Calcite Inorganic materials 0.000 claims description 27
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 27
- 239000011575 calcium Substances 0.000 claims description 26
- 229910052700 potassium Inorganic materials 0.000 claims description 15
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 14
- 229910052708 sodium Inorganic materials 0.000 claims description 14
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 13
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 13
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 13
- 229910052622 kaolinite Inorganic materials 0.000 claims description 13
- 239000011591 potassium Substances 0.000 claims description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 12
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 239000011593 sulfur Substances 0.000 claims description 10
- 239000010453 quartz Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000007619 statistical method Methods 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 5
- 239000003345 natural gas Substances 0.000 abstract description 3
- 239000003209 petroleum derivative Substances 0.000 abstract description 3
- 235000010755 mineral Nutrition 0.000 description 143
- 229910052782 aluminium Inorganic materials 0.000 description 11
- 239000010433 feldspar Substances 0.000 description 8
- 229910052791 calcium Inorganic materials 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- -1 analcite Inorganic materials 0.000 description 3
- 229940072033 potash Drugs 0.000 description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 3
- 235000015320 potassium carbonate Nutrition 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 229910052655 plagioclase feldspar Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000665848 Isca Species 0.000 description 1
- 229910020091 MgCa Inorganic materials 0.000 description 1
- 101100003996 Mus musculus Atrn gene Proteins 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910052908 analcime Inorganic materials 0.000 description 1
- 238000012550 audit Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001649 dickite Inorganic materials 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 229910052621 halloysite Inorganic materials 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/00584—Control arrangements for automatic analysers
Abstract
The invention provides a method, a device, equipment and a storage medium for detecting mineral composition in sedimentary rock, and belongs to the technical field of petroleum and natural gas exploration and development. The method comprises the following steps: determining at least one scaling factor according to the region and the horizon where the target sedimentary rock is located, wherein each scaling factor is used for representing the ratio of mass fractions of two minerals in the target sedimentary rock; acquiring mass fractions of elements in the target sedimentary rock through element logging; and obtaining the mass fraction of each mineral in the target sedimentary rock according to the chemical molecular formula of each mineral in the target sedimentary rock, the proportionality coefficient and the mass fraction of each element in the target sedimentary rock. The scheme can improve the accuracy of detecting the mineral composition in the sedimentary rock.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to a method, a device, equipment and a storage medium for detecting mineral composition in sedimentary rock.
Background
In the petroleum and natural gas exploration and development process, the stratum in which the oil and gas drilling is carried out is mainly sedimentary rock, if the components of various minerals in the sedimentary rock can be accurately identified, rock scraps and cores can be accurately named according to the components of various minerals in the sedimentary rock, parameters such as rock density, porosity, gas saturation, oil saturation, poisson ratio and Young modulus can be calculated according to the components of various minerals in the sedimentary rock, and further the efficiency of oil and gas exploration and development can be improved. The mineral composition of sedimentary rock mainly comprises potassium feldspar, albite, analcite, quartz, calcite, dolomite, pyrite, illite, kaolinite, montmorillonite, mica, gypsum, etc.
At present, when the mineral composition in the sedimentary rock is detected, the corresponding relation between the element content and the mineral composition in the sedimentary rock is determined according to experience, and after the content of each element in the sedimentary rock is obtained, the mineral composition of the sedimentary rock is determined according to the corresponding relation and the obtained element content. For example, the calcite content in the sedimentary rock is determined to be 2.5 times of the calcium element according to experience, and after the calcium element content in the sedimentary rock is obtained to be X, the calcite content in the sedimentary rock is directly determined to be 2.5X.
Since sedimentary rocks in different regions and horizons have different mineral compositions, and different minerals may include one or more identical elements, the empirically determined correspondence between element content and mineral composition is not universal, and thus the accuracy of detecting the mineral composition in the sedimentary rocks by the existing method is low.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for detecting the composition of minerals in sedimentary rocks, which can improve the accuracy of detecting the composition of the minerals in the sedimentary rocks. The technical scheme provided by the embodiment of the invention is as follows:
in a first aspect, an embodiment of the present invention provides a method for detecting a mineral composition in sedimentary rock, including:
Determining at least one scaling factor according to the region and the horizon where the target sedimentary rock is located, wherein each scaling factor is used for representing the ratio of mass fractions of two minerals in the target sedimentary rock;
acquiring mass fractions of elements in the target sedimentary rock through element logging;
and obtaining the mass fraction of each mineral in the target sedimentary rock according to the chemical molecular formula of each mineral in the target sedimentary rock, the proportionality coefficient and the mass fraction of each element in the target sedimentary rock.
In a first possible implementation manner, with reference to the first aspect, the determining at least one scaling factor according to a region and a horizon where the target sedimentary rock is located includes:
acquiring all-rock analysis data of the region and the horizon where the target sedimentary rock is located;
carrying out statistical analysis on the all-rock analysis data to obtain first mass fractions of each mineral, wherein the first mass fraction of one mineral is used for representing the average mass fraction of the mineral in the region and the horizon where the target sedimentary rock is located;
at least one of the scaling factors is obtained according to the first mass fraction of each mineral, wherein one scaling factor is the ratio of the first mass fractions of the corresponding two minerals.
In a second possible implementation manner, with reference to the first aspect or the first possible implementation manner of the first aspect, the obtaining at least one scaling factor according to the first mass fraction of each mineral includes:
determining a ratio of the first mass fraction of gypsum to the first mass fraction of pyrite as a first ratio coefficient;
determining the ratio of the first mass fraction of the potassium feldspar to the first mass fraction of the mica as a second proportionality coefficient;
determining the first mass fraction of montmorillonite and the average mass fraction of magnesium element in the region and the horizon where the target sedimentary rock is located as a third scaling factor;
the ratio of the first mass fraction of analcite to the first mass fraction of albite is determined as a fourth scaling factor.
In a third possible implementation manner, with reference to the second possible implementation manner, the obtaining the mass fraction of each mineral in the target sedimentary rock according to the chemical molecular formula of each mineral in the target sedimentary rock, the proportionality coefficient, and the mass fraction of each element in the target sedimentary rock includes:
judgingWhether the quality is met or not is judged, wherein Fe is used for representing the mass fraction of iron element in the target sedimentary rock, S is used for representing the mass fraction of sulfur element in the target sedimentary rock, and a is used for representing the first proportional coefficient;
If it isIf so, determining that the mass fraction of pyrite in the target sedimentary rock isAnd determining the mass fraction of illite in the target sedimentary rock as +.> And determining that the mass fraction of gypsum in the target sedimentary rock is a.Fe;
if it isIf not, determining the purposeThe mass fraction of pyrite in the target sedimentary rock is 201429Fe, the mass fraction of illite in the target sedimentary rock is determined to be 0, and the mass fraction of gypsum in the target sedimentary rock is determined to be a.Fe.
In a fourth possible implementation manner, with reference to the third possible implementation manner, after determining a mass fraction of illite and gypsum in the target sedimentary rock, the method further includes:
judgingWhether the quality is met or not, wherein K is used for representing the mass fraction of potassium element in the target sedimentary rock, and YI is used for representing the mass fraction of illite in the target sedimentary rock;
if it isIf so, determining that the mass fraction of the mica in the target sedimentary rock is as followsAnd determining the mass fraction of potassium feldspar in the target sedimentary rock as +.>Wherein b is used to characterize the second scaling factor;
if it isIf not, determining that the mass fractions of mica and potassium feldspar in the target sedimentary rock are 0;
Determining the mass fraction of montmorillonite in the target sedimentary rock to be 6.3498 c-Mg, wherein Mg is used for representing the mass fraction of magnesium element in the target sedimentary rock, and c is used for representing the third scaling factor;
if it isCa is less than or equal to 0.2759Sg+0.275 c.Mg, then the process is ensuredDetermining that mass fractions of calcite and dolomite in the target sedimentary rock are 0, wherein Ca is used for representing mass fractions of calcium elements in the target sedimentary rock, and Sg is used for representing mass fractions of gypsum in the target sedimentary rock;
if it isAnd Ca>0.2759Sg+0.275 c.Mg, determining that the mass fraction of calcite in the target sedimentary rock is 2.5 Ca-0.6875c.Mg, and determining that the mass fraction of dolomite in the target sedimentary rock is 0;
if it isAnd Ca is less than or equal to 0.2759Sg+ (1.6667-1.3917 c) Mg-0.1346 YI, determining that the mass fraction of calcite in the target sedimentary rock is 0, and determining that the mass fraction of dolomite in the target sedimentary rock is (7.6667-7.6667 c) Mg-0.6193 YI;
if it isAnd Ca>0.2759Sg+ (1.6667-1.3917 c) Mg-0.1346 YI, determining that the mass fraction of calcite in the target sedimentary rock is 2.5Ca-2.5 (1.6667-1.3917 c) Mg-0.1346YI+0.2759Sg, and determining that the mass fraction of dolomite in the target sedimentary rock is (7.6667-7.6667 c) Mg-0.6193 YI.
In a fifth possible implementation manner, with reference to the fourth possible implementation manner, after determining a mass fraction of montmorillonite in the target sedimentary rock, the method further includes:
judging whether Na is less than or equal to 0.0249Mt or not, wherein Na is used for representing the mass fraction of sodium element in the target sedimentary rock, and Mt is used for representing the mass fraction of montmorillonite in the target sedimentary rock;
if Na is less than or equal to 0.0249Mt, determining that the mass fractions of albite and analcite in the target sedimentary rock are 0;
if Na is less than or equal to 0.0249Mt, determining that the mass fraction of albite in the target sedimentary rock isAnd determining that the mass fraction of the analcite in the target sedimentary rock is Nc.d, wherein Nc is used for representing the mass fraction of the albite in the target sedimentary rock, and d is used for representing the fourth scaling factor.
In a sixth possible implementation manner, with reference to the fifth possible implementation manner, after determining a mass fraction of albite and analcite in the target sedimentary rock, the method further includes:
determining that the mass fraction of kaolinite in the target sedimentary rock is 4.7778 (Al-0.0971 Jc-0.1031Nc-0.1227Ff-0.1363 Yi-0.1772 Mt-0.2035 Ym), wherein Al is used for characterizing the mass fraction of aluminum element in the target sedimentary rock, jc is used for characterizing the mass fraction of potassium feldspar in the target sedimentary rock, nc is used for characterizing the mass fraction of albite in the target sedimentary rock, ff is used for characterizing the mass fraction of analcite in the target sedimentary rock, ym is used for characterizing the mass fraction of mica in the target sedimentary rock;
The mass fraction of quartz in the target sedimentary rock was determined to be 2.1429 (Si-0.3022 Jc-0.3206Nc-0.2545Ff-0.1885 YI-0.2171 Gl-0.3675Mt-0.2111 Ym), wherein Hl was used to characterize the mass fraction of kaolin in the target sedimentary rock.
In a second aspect, an embodiment of the present invention further provides an apparatus for detecting a mineral composition in sedimentary rock, including:
a coefficient determining module, configured to determine at least one scaling factor according to a region and a horizon where a target sedimentary rock is located, where each scaling factor is used to characterize a ratio of mass fractions of two minerals in the target sedimentary rock;
the data acquisition module is used for acquiring the mass fraction of each element in the target sedimentary rock through element logging;
and the composition analysis module is used for obtaining the mass fraction of each mineral in the target sedimentary rock according to the chemical molecular formula of each mineral in the target sedimentary rock, the proportionality coefficient determined by the coefficient determination module and the mass fraction of each element in the target sedimentary rock obtained by the data acquisition module.
In a third aspect, embodiments of the present invention further provide a computer device, the computer device comprising a processor and a memory, the memory storing at least one instruction, at least one program, a set of codes or a set of instructions, the program, the set of codes or the set of instructions being loaded and executed by the processor to implement a method of detecting mineral composition in sedimentary rock as provided by the above first aspect or any one of the possible implementations of the first aspect.
In a fourth aspect, embodiments of the present invention further provide a computer readable storage medium having stored therein at least one instruction, at least one program, a set of codes or a set of instructions, the at least one instruction, the at least one program, the set of codes or the set of instructions being loaded and executed by a processor to implement a method for detecting mineral composition in sedimentary rock as provided in the first aspect or any one of the possible implementations of the first aspect.
According to the technical scheme, the proportional coefficients for representing the mass fraction ratio of different minerals in the target sedimentary rock are determined according to the region and the horizon where the target sedimentary rock is located, the mass fractions of the elements in the target sedimentary rock are obtained through element logging, and then the mass fractions of the minerals in the target sedimentary rock are deduced based on the chemical molecular formulas of the minerals in the target sedimentary rock, the obtained proportional coefficients and the mass fractions of the elements. The mineral composition detection of the sedimentary rock is performed based on the chemical molecular formula of the minerals, and the proportion coefficient is determined according to the mineral composition of the same horizon in the area where the target sedimentary rock is located, so that the mineral composition detection principle is more reasonable and accurate, and the accuracy of detecting the mineral composition in the sedimentary rock can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for detecting mineral composition in sedimentary rock in accordance with one embodiment of the invention;
FIG. 2 is a schematic illustration of a comparative mineral composition test result provided in one embodiment of the present invention;
FIG. 3 is a schematic illustration of the results of another comparative mineral composition test provided in one embodiment of the present invention;
fig. 4 is a schematic view of an apparatus for detecting mineral composition in sedimentary rock according to an embodiment of the invention.
The symbols in the drawings are as follows:
41. a coefficient determination module; 42. a data acquisition module; 43. and (5) forming an analysis module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
In order to facilitate understanding of the embodiments of the present invention, the following first describes an application scenario of the embodiments of the present invention. In the drilling process of oil and gas exploration and development, after a rock sample brought by a drill bit from underground is obtained, element composition of the rock sample can be detected by using element logging equipment, namely, mass fractions of elements in the rock sample are obtained. In order to determine the physical properties of the rock downhole, it is necessary to determine the mineral composition of the rock sample from the elemental composition of the rock sample, i.e. determine the mass fractions of the various minerals and minerals comprised by the rock sample, and thus parameters such as porosity, total organic carbon (Total Organic Carbon, TOC), water saturation, gas saturation, oil saturation, rock density, longitudinal wave time difference, transverse wave time difference, poisson's ratio, young's modulus, fracture pressure and triaxial stress of the rock downhole may be determined from the mineral composition of the rock sample.
Sedimentary rock is one of three major rock species, including clastic rock, shale, carbonate rock, and gypsum rock. The sedimentary rock mineral components mainly comprise minerals such as quartz, orthofeldspar, plagioclase, analcite, kaolinite, illite, montmorillonite, mica, pyrite, gypsum and the like. Table 1 below shows the main minerals included in the sedimentary rock, and shows the chemical formulas and main elements corresponding to each mineral. The gypsum referred to in table 1 and the examples below is a type between the gypsum and the calcined gypsum.
TABLE 1
| Mineral name | Chemical formula | Main element |
| Potassium feldspar | KAlSi 3 O 8 | Si、Al、K |
| Albite feldspar | Na 2 O·Al 2 O 3 ·6SiO 2 | Si、Al、Na |
| Analcite | NaAlSi 2 O 6 ·H 2 O | Si、Al、Na |
| Quartz | SiO 2 | Si |
| Calcite | CaCO 3 | Ca |
| Dolomite (Dolomite) | MgCa(CO 3 ) 2 | Ca、Mg |
| Pyrite (pyrite) | FeS 2 | Fe、S |
| Illite (Italian stone) | K 0.75 (Al,Mg,Fe) 2 [(Si,Al)Si 3 O 10 ][OH] 2 ·H 2 O | K、Si、Al、Mg、Fe |
| Kaolinite | Al 2 Si 2 O 5 (OH) 4 | Si、Al |
| Montmorillonite | (Na,Ca) 0.33 (Al,Mg) 2 [Si 4 O 10 ](OH) 2 ·nH 2 O | Si、Al、Ca、Mg、Na |
| Mica | KAl 2 (AlSi 3 O 10 )(OH) 2 | Si、Al、K |
| Gypsum plaster | CaSO 4 ·H 2 O | S、Ca |
The minerals listed in table 1 are not all the minerals constituting the sedimentary rock, but the minerals listed in table 1 are only the minerals having a large mass fraction in the sedimentary rock, and only the mass fractions of the minerals in table 1 are considered in the actual application scenario. In addition, not all sedimentary rocks include all of the minerals listed in Table 1 above, some sedimentary rocks may include all of the minerals listed in Table 1 above, and others may include only some of the minerals listed in Table 1 above, depending on the region and horizon in which the sedimentary rocks are located.
Fig. 1 is a method for detecting mineral composition in sedimentary rock according to an embodiment of the present invention. As shown in fig. 1, the method for detecting the mineral composition in the sedimentary rock provided by the embodiment of the invention can include the following steps:
step 11: and determining at least one proportionality coefficient according to the region and the horizon where the target sedimentary rock is located.
Since sedimentary rocks in different regions and horizons have different mineral compositions, but sedimentary rocks in the same region and horizon have similar mineral compositions, in order to determine the mineral composition of a target sedimentary rock, a scaling factor for characterizing the relative proportion of partial minerals in the target sedimentary rock is determined first according to the region and horizon in which the target sedimentary rock is located, and then after determining the mass fraction of a part of minerals in the target sedimentary rock, the mass fraction of the rest of minerals in the target sedimentary rock can be determined according to the scaling factor.
According to the region and the horizon in which the target sedimentary rock is located, at least one scaling factor is determined, so that each scaling factor is used for representing the ratio of the mass fractions of two different minerals in the target sedimentary rock, and different scaling factors are used for representing the ratio of the mass fractions of different minerals, which makes it possible to determine the mineral composition of the sedimentary rock according to the chemical molecular formula of each mineral included in the sedimentary rock, and since each scaling factor is statistical data determined according to the region and the horizon in which the target sedimentary rock is located, the accuracy of the result that can be obtained by each mineral mass fraction in the target sedimentary rock is determined according to the determined scaling factor.
In one possible implementation, the scaling factor may be determined according to the whole rock analysis data of the region and the horizon where the target sedimentary rock is located, specifically, the following steps may be implemented:
s111: and acquiring full rock analysis data of the region and the horizon where the target sedimentary rock is located.
And acquiring all-rock analysis data of a plurality of positions in the same region and horizon as the target sedimentary rock according to the region and horizon in which the target sedimentary rock is positioned. The position in the same region as the target sedimentary rock refers to a position horizontally adjacent to the acquisition position of the target sedimentary rock, for example, a position in a region with a radius of 1000 meters centered on the ground position corresponding to the acquisition position of the target sedimentary rock is defined as a position in the same region as the target sedimentary rock. The same horizon as the target sedimentary rock means a position adjacent to the acquisition position of the target sedimentary rock in a vertical distance, for example, a position within a vertical distance of 50 meters from the acquisition position of the target sedimentary rock is defined as a position at the same horizon as the target sedimentary rock.
The total rock analysis data is rock composition data determined by laboratory analysis, including mass fractions of various minerals that make up the rock. Rock samples collected from different horizons downhole are subjected to full rock analysis during the occurrence of oil and gas exploration to obtain the mineral composition of the rock at the different horizons downhole. When acquiring the all-rock analysis data of the region and the horizon of the target sedimentary rock, the all-rock analysis data of the same horizon of the target sedimentary rock under a plurality of wells in the same region as the target sedimentary rock can be acquired.
S112: and carrying out statistical analysis on the acquired whole rock analysis data to obtain a first quality analysis of various minerals.
After acquiring all-rock analysis data of a plurality of positions which are in the same region and horizon as the acquisition position of the target sedimentary rock, calculating the average mass fraction of each mineral constituting the sedimentary rock according to the acquired all-rock analysis data, and determining the calculated average mass fraction as a first mass fraction corresponding to the mineral. The first mass fraction of each mineral constituting the sedimentary rock can be calculated separately, in particular by means of averaging or median values.
S113: at least one scaling factor is obtained from the first mass fraction of each mineral.
According to different manners of calculating the mineral composition in the target sedimentary rock, different proportion coefficients can be determined, so that the ratio of different mineral fractions in the target sedimentary rock can be represented by the determined proportion coefficients. Specifically, when the ratio of the mass fractions of the minerals a and B in the target sedimentary rock is needed in the subsequent step of detecting the mineral composition of the target sedimentary rock, the ratio of the first mass fraction of the mineral a to the first mass fraction of the mineral B is calculated as a scaling factor according to the first mass fraction of each mineral determined in S112, and the calculated scaling factor is used for characterizing the ratio of the mass fractions of the minerals a and B in the target sedimentary rock.
Sedimentary rocks in the same region and horizon have similar mineral compositions, and the ratio of the mass fractions of each mineral in the target sedimentary rock is estimated according to the whole rock analysis data of a plurality of positions in the same region and horizon with the target sedimentary rock, so that the accuracy of estimating the ratio of the mass fractions of each mineral in the target sedimentary rock, namely the accuracy of the determined proportionality coefficient is ensured, and further, the accuracy of a detection result obtained by detecting the mineral composition of the sedimentary rock is ensured.
When the proportion coefficient is determined, for the region and the horizon where the target sedimentary rock is located, one or more pairs of minerals with relatively stable relative occupation in sedimentary rock of the region and the horizon can be determined according to the whole rock analysis data of the region and the horizon, and then the proportion coefficient is calculated for each pair of minerals respectively to represent the ratio of mass fractions of each pair of minerals. For example, the determined scaling factor may include a scaling factor for characterizing a mass fraction ratio of gypsum to pyrite in the target sedimentary rock, a scaling factor for characterizing a mass fraction ratio of potassium feldspar to mica in the target sedimentary rock, a scaling factor for characterizing a mass fraction ratio of analcite to albite in the target sedimentary rock, a scaling factor for characterizing a mass fraction ratio of illite to gypsum in the target sedimentary rock, a scaling factor for characterizing a mass fraction ratio of kaolinite to analcite in the target sedimentary rock, a scaling factor for characterizing a mass fraction ratio of montmorillonite to magnesium element in the target sedimentary rock, and the like.
In one possible implementation, when the scaling factor is obtained according to the first mass fraction of each mineral, S113 may determine the ratio of the first mass fraction of gypsum to the first mass fraction of pyrite as a first scaling factor, the ratio of the first vector fraction of potash feldspar to the first mass fraction of mica as a second scaling factor, the average mass fraction of montmorillonite to the magnesium element in the region and horizon where the target sedimentary rock is located as a third scaling factor, and the ratio of the first mass fraction of analcite to the first mass fraction of albite as a fourth scaling factor.
On the one hand, after the mass fraction ratio of gypsum to pyrite, potash feldspar to mica, montmorillonite to magnesium element and analcite to albite in the target sedimentary rock are respectively determined, the mass fraction of each element in the target sedimentary rock and the chemical molecular formula of each mineral are combined, so that the mass fraction of each mineral in the target sedimentary rock can be deduced, and the mineral composition detection of the target sedimentary rock is realized. On the other hand, the mass fraction ratio between gypsum and pyrite, potash feldspar and mica, montmorillonite and magnesium element and analcite and albite in sedimentary rock is relatively stable, so that the first, second, third and fourth scale coefficients are determined for detecting the mineral composition of sedimentary rock, and the mineral composition of sedimentary rock can be detected relatively accurately.
Step 12: and acquiring the mass fraction of each element in the target sedimentary rock through element logging.
The element logging is a technical scheme for analyzing rock components, and can be realized by an element logging instrument. After the target sedimentary rock which needs to be subjected to mineral composition detection is obtained, the element logging instrument is used for detecting the target sedimentary rock, so that the mass fraction of each element in the target sedimentary rock can be obtained.
In the obtaining of the mass fraction of each element in the target sedimentary rock, it is not necessary to obtain the mass fraction of all the elements constituting the target sedimentary rock, but only the mass fraction of the main element constituting the target sedimentary rock, for example, only the mass fraction of the element having a mass fraction of more than 0.5% is obtained.
In one possible implementation, the mass fractions of iron, sulfur, potassium, magnesium, calcium, sodium, silicon, and aluminum in the target sedimentary rock are obtained by elemental logging.
Step 13: and obtaining the mass fraction of each mineral in the target sedimentary rock according to the chemical molecular formula of each mineral in the target sedimentary rock, each proportion coefficient and the mass fraction of each element in the target sedimentary rock.
The mass fraction of each mineral in the target sedimentary rock can be deduced from the proportionality coefficients obtained in step 11 and the mass fractions of each element in the target sedimentary rock obtained in step 12, in combination with the chemical molecular formula of each mineral constituting the sedimentary rock. The method combines the proportionality coefficient determined according to the mineral composition of the region and the horizon where the target sedimentary rock is located and the chemical molecular formula of each mineral, so that the detection process of the mineral composition of the sedimentary rock is more scientific, and the mineral composition of the sedimentary rock can be detected more accurately.
In one possible implementation, since the pyrite and the illite both include iron elements and the pyrite and the gypsum both include sulfur elements, the mass fractions of the pyrite, the illite, and the gypsum in the target sedimentary rock can be determined according to the mass fractions of the sulfur element, the iron element in the target sedimentary rock in combination with the first scaling factor in the above embodiment. From the chemical formulas of pyrite, illite and gypsum in table 1 above, it is known that the mass fraction of pyrite=2.1429×the mass fraction of iron element in pyrite= 1.8750 ×the mass fraction of sulfur element in pyrite, the mass fraction of illite= 5.0358 ×the mass fraction of iron element in illite, the mass fraction of gypsum= 4.5313 ×the mass fraction of sulfur element in gypsum, whereby the mass fractions of pyrite, illite and gypsum in target sedimentary rock can be determined by:
judgingWhether the conditions are met or not, wherein Fe is used for representing the mass fraction of iron element in the target sedimentary rock, S is used for representing the mass fraction of sulfur element in the target sedimentary rock, and a is used for representing a first proportional coefficient;
if it isIf so, determining that the mass fraction of pyrite in the target sedimentary rock is +. >And determining the mass fraction of illite in the target sedimentary rock as +.> Determining the mass fraction of gypsum in the target sedimentary rock as a.Fe;
if it isIf the mass fraction of pyrite in the target sedimentary rock is 201429Fe, the mass fraction of illite in the target sedimentary rock is 0, and the mass fraction of gypsum in the target sedimentary rock is a.Fe.
Based on the mass fractions of elemental sulfur and elemental iron in the target sedimentary rock and the chemical formulas of pyrite and illite, it is possible to determine the presence of both elemental sulfur and elemental iron in excess. If it isS, the excessive iron element in the target sedimentary rock is described, at the moment, the mass fractions of pyrite and illite in the target sedimentary rock are determined based on the mass fractions of sulfur element in the target sedimentary rock, and the mass fraction of gypsum in the target sedimentary rock is determined according to the determined mass fractions of pyrite. If->And (3) indicating the excessive sulfur element in the target sedimentary rock, determining that the target sedimentary rock does not comprise illite, further determining the mass fraction of pyrite in the target sedimentary rock based on the mass fraction of iron element in the target sedimentary rock, and determining the mass fraction of gypsum in the target sedimentary rock according to the determined mass fraction of pyrite.
In one possible way, as can be seen from table 1 above, since only potassium feldspar, illite and mica include potassium elements, after determining the mass fraction of illite in the target sedimentary rock, the mass fraction of potassium feldspar and mica in the target sedimentary rock can be determined from the mass fraction of potassium elements and the mass fraction of illite in the target sedimentary rock in combination with the second scaling factor in the above embodiment. From the chemical formulas of potassium feldspar, mica and illite in table 1 above, it is known that the mass fraction of potassium feldspar= 7.1282 ×the mass fraction of potassium element in potassium feldspar, the mass fraction of mica= 10.2051 ×the mass fraction of potassium element in mica, the mass fraction of illite= 20.3162 ×the mass fraction of potassium element in illite, whereby the mass fractions of potassium feldspar and mica in target sedimentary rock can be determined by the following method:
judgingWhether the quality is met or not, wherein K is used for representing the mass fraction of potassium element in the target sedimentary rock, and YI is used for representing the mass fraction of illite in the target sedimentary rock;
if it isIf so, determining the mass fraction of mica in the target sedimentary rock as +.> And determining the mass fraction of potassium feldspar in the target sedimentary rock as +. >Wherein b is used to characterize a second scaling factor;
if it isIf not, determining that the mass fractions of the mica and the potassium feldspar in the target sedimentary rock are 0.
Based on the chemical formulas of potassium feldspar, mica and illite, it can be determined that there are two cases of excess potassium element and insufficient potassium element. If it isAnd (3) indicating the excessive potassium element in the target sedimentary rock, determining the mass fraction of mica in the target sedimentary rock according to the mass fraction of illite in the target sedimentary rock and the second proportionality coefficient, and further determining the mass fraction of potassium feldspar in the target sedimentary rock according to the determined mass fraction of mica. If->The defect of potassium element in the target sedimentary rock is indicated, and at the moment, the mass fractions of potassium feldspar and mica in the target sedimentary rock can be directly determined to be 0.
In one possible implementation, according to the chemical formula of montmorillonite, the mass fraction of montmorillonite= 6.3498 ×the mass fraction of magnesium element in montmorillonite, and the third scaling factor is used to characterize the ratio of the mass fraction of montmorillonite in the target sedimentary rock to the mass fraction of magnesium element in the target sedimentary rock, so that the mass fraction of montmorillonite in the target sedimentary rock is 6.3498c·mg, wherein Mg is used to characterize the mass fraction of magnesium element in the target sedimentary rock, according to the mass fraction of magnesium element in the target sedimentary rock and the third scaling factor.
In one possible implementation, as can be seen from table 1 above, since only calcite, dolomite, montmorillonite and gypsum include calcium elements and only dolomite, illite and montmorillonite include magnesium elements, after determining the mass fractions of illite, gypsum and montmorillonite in the target sedimentary rock, the mass fractions of dolomite and calcite in the target sedimentary rock can be determined from the mass fractions of illite, gypsum and montmorillonite in the target sedimentary rock. As is known from the chemical formulas of calcite, dolomite, montmorillonite and illite in table 1 above, the mass fraction of calcite=2.5×the mass fraction of calcium element in calcite, the mass fraction of dolomite=4.6×the mass fraction of calcium element in dolomite= 7.6667 ×the mass fraction of magnesium element in dolomite, the mass fraction of montmorillonite= 6.3498 ×the mass fraction of magnesium element in montmorillonite, and the mass fraction of illite= 12.3802 ×the mass fraction of magnesium element in illite, whereby the mass fractions of calcite and dolomite in target sedimentary rock can be determined by the following method:
if it isAnd Ca is less than or equal to 0.2759Sg+0.275 c.Mg, determining that the mass fractions of calcite and dolomite in the target sedimentary rock are 0, wherein Ca is used for representing the mass fraction of calcium element in the target sedimentary rock, and Sg is used for representing the mass fraction of gypsum in the target sedimentary rock;
If it isAnd Ca>0.2759Sg+0.275 c.Mg, determining that the mass fraction of calcite in the target sedimentary rock is 2.5 Ca-0.6875c.Mg, and determining that the mass fraction of dolomite in the target sedimentary rock is 0;
if it isAnd Ca is less than or equal to 0.2759Sg+ (1.6667-1.3917 c) Mg-0.1346 YI, determining that the mass fraction of calcite in the target sedimentary rock is 0, and determining that the mass fraction of dolomite in the target sedimentary rock is (7.6667-7.6667 c) Mg-0.6193 YI;
if it isAnd Ca>0.2759Sg+ (1.6667-1.3917 c) Mg-0.1346 YI, then determining that the mass fraction of calcite in the target sedimentary rock is 2.5Ca-2.5 (1.6667-1.3917 c) Mg-0.1346YI+0.2759Sg, and determining that the mass fraction of dolomite in the target sedimentary rock is (7.6667-7.6667 c) Mg-0.6193 YI.
The inferred result in 4 can be determined according to the mass fraction of magnesium element and calcium element according to the chemical formulas of dolomite, calcite, illite and gypsum. If it isAnd Ca is less than or equal to 0.2759Sg+0.275 c.Mg, which indicates that the magnesium element and the calcium element in the target sedimentary rock are insufficient, and the mass fractions of calcite and dolomite in the target sedimentary rock are directly determined to be 0. If->And Ca>0.2759Sg+0.275 c.Mg, which indicates that the magnesium element in the target sedimentary rock is insufficient and the calcium element is excessive, at this time, the mass fraction of calcite in the target sedimentary rock is determined according to the mass fractions of the calcium element, the magnesium element and the gypsum in the target sedimentary rock, and the mass fraction of dolomite in the target sedimentary rock is determined to be 0. If- >And Ca is less than or equal to 0.2759Sg+ (1.6667-1.3917 c) Mg-0.1346 YI, which indicates that the magnesium element in the target sedimentary rock is excessive and the calcium element is insufficient, at the moment, the mass fraction of calcite in the target sedimentary rock is determined to be 0, and then the mass fraction of dolomite in the target sedimentary rock is determined according to the mass fractions of magnesium element and illite in the target sedimentary rock. If->And Ca>0.2759Sg+ (1.6667-1.3917 c) Mg-0.1346 YI, which shows that the target sedimentary rock has excessive magnesium element and excessive calcium element, and at this time, the mass fraction of calcite in the target sedimentary rock is determined according to the mass fractions of calcium element, magnesium element, illite and gypsum in the target sedimentary rock, and the mass fraction of dolomite in the target sedimentary rock is determined according to the mass fractions of magnesium element and illite in the target sedimentary rock.
In one possible implementation, as can be seen from table 1 above, since only albite, analcite and montmorillonite include sodium elements, after determining the mass fraction of montmorillonite in the target sedimentary rock, the mass fractions of albite and analcite in the target sedimentary rock can be determined from the mass fraction of montmorillonite in the target sedimentary rock in combination with the fourth scaling factor used to characterize the mass fraction ratio of analcite to albite in the target sedimentary rock in the above example. As can be seen from the chemical formulas of albite, analcite and montmorillonite in the above table 1, the mass fraction of albite= 11.3913 ×the mass fraction of sodium element in albite, the mass fraction of analcite= 9.5652 ×the mass fraction of sodium element in analcite, the fraction of montmorillonite= 40.1568 ×the mass fraction of sodium element in montmorillonite, whereby the mass fractions of albite and analcite in target sedimentary rock can be determined by:
Judging whether Na is less than or equal to 0.0249Mt or not, wherein Na is used for representing the mass fraction of sodium element in the target sedimentary rock, and Mt is used for representing the mass fraction of montmorillonite in the target sedimentary rock;
if Na is less than or equal to 0.0249Mt, determining that the mass fractions of albite and analcite in the target sedimentary rock are 0;
if Na is less than or equal to 0.0249Mt, determining that the mass fraction of albite in the target sedimentary rock isAnd determining the mass fraction of the analcite in the target sedimentary rock to be Nc.d, wherein Nc is used for representing the mass fraction of the albite in the target sedimentary rock, and d is used for representing a fourth scaling factor.
Based on the chemical formulas of albite, analcite and montmorillonite, it can be determined that there are both excess and deficiency of sodium element in the target sedimentary rock. If Na is less than or equal to 0.0249Mt, the defect of sodium element in the target sedimentary rock is indicated, and at the moment, the mass fractions of the albite and the analcite in the target sedimentary rock can be directly determined to be 0. If Na is more than 0.0249Mt, the excessive sodium element in the target sedimentary rock is indicated, and at the moment, the mass fraction of the albite in the target sedimentary rock can be determined according to the mass fractions of the sodium element and the montmorillonite in the target sedimentary rock, and then the mass fraction of the analcite in the target sedimentary rock is determined according to the determined mass fraction of the albite.
In one possible manner, as can be seen from table 1 above, since only the potassium feldspar, albite, analcite, illite, kaolinite, montmorillonite and mica include aluminum elements, after determining the mass fractions of potassium feldspar, albite, analcite, montmorillonite and mica in the target sedimentary rock, the mass fraction of kaolinite in the target sedimentary rock can be determined as 4.7778 (Al-0.0971 Jc-0.1031Nc-0.1227Ff-0.1363Yl-0.1772Mt-0.2035 Ym), wherein Al is used to characterize the mass fraction of aluminum elements in the target sedimentary rock, jc is used to characterize the mass fraction of potassium feldspar in the target sedimentary rock, nc is used to characterize the mass fraction of sodium feldspar in the target sedimentary rock, ff is used to characterize the mass fraction of analcite in the target sedimentary rock, and Ym is used to characterize the mass fraction of mica in the target sedimentary rock.
In one possible implementation, as can be seen from table 1 above, since only potassium feldspar, albite, analcite, quartz, illite, kaolinite, montmorillonite and mica include silicon elements, after determining the mass fractions of potassium feldspar, albite, analcite, quartz, illite, kaolinite, montmorillonite and mica in the target sedimentary rock, the mass fractions of potassium feldspar, albite, analcite, quartz, illite, kaolinite, montmorillonite and mica in the target sedimentary rock can be determined to be 2.1429 (Si-0.3022 Jc-0.3206Nc-0.2545Ff-0.1885Yl-0.2171Gl-0.3675Mt-0.2111 Ym), wherein Gl is used to characterize the mass fraction of kaolinite in the target sedimentary rock.
Optionally, on the basis of the method for detecting the mineral composition in the sedimentary rock provided by the above embodiments, after determining the mass fraction of each mineral in the target sedimentary rock, normalization processing may be performed to make the sum of the mass fractions of each mineral equal to 100%, and then the mass fraction of each mineral may be compared with the total rock analysis data of the target sedimentary rock, so that the error between each mineral is within the industry standard control range, and finally the mass fraction of each mineral in the target sedimentary rock is determined. By adopting the method for detecting the mineral composition in the sedimentary rock, provided by the embodiment of the invention, the calculation models of the logging minerals of different blocks, different horizons and different mud system elements can be established.
The method for detecting the mineral composition in the sedimentary rock provided by the embodiment of the invention can accurately detect the mass fraction of the mineral in the sedimentary rock. For the Sichuan basin from tribute-Luzhou area Longmaxi group-Wufeng group shale reservoir, FIG. 2 is a comparison chart of the mass fraction of each mineral in the A-well core detected by the method provided by the embodiment of the invention and the mass fraction of each mineral in the A-well core obtained by full rock analysis, and FIG. 3 is a comparison chart of the mass fraction of each mineral in the B-well rock debris detected by the method provided by the embodiment of the invention and the mass fraction of each mineral in the B-well rock debris obtained by full rock analysis. As can be seen from fig. 2 and fig. 3, the variation trend of the content of each mine area (shown by the curve in the figure) and the absolute value of the content (shown by the transverse line in the figure) determined by the method provided by the embodiment of the invention have a better corresponding relationship, which indicates that the mass fraction of each mine in the sedimentary rock can be accurately determined by the method provided by the embodiment of the invention.
In fig. 2 and 3, the total amount of clay is only the total amount of all the rock analysis data, and the longmaxi group-wufeng group feldspar in the local area is mainly plagioclase, so that the total amount of clay and feldspar in fig. 2 and 3 is not specific to clay minerals and feldspar minerals.
Corresponding to fig. 2, table 2 below shows the mineral composition data of the a-well section layer detected by the method provided by the embodiment of the present invention, and table 3 below shows the total rock analysis data of the a-well core.
TABLE 2
TABLE 3 Table 3
Corresponding to fig. 3, table 4 below shows the mineral composition data of the B-well partial horizon detected by the method provided by the example of the present invention, and table 5 below shows the partial total rock analysis data of the B-well cuttings.
TABLE 4 Table 4
TABLE 5
The following is an embodiment of the device according to the present invention, and for details of the embodiment of the device that are not described in detail, reference may be made to corresponding descriptions in the foregoing method embodiment, which are not described herein again.
An apparatus for detecting mineral composition in sedimentary rock in accordance with one embodiment of the invention is illustrated in figure 4. The apparatus may be implemented as all or part of a terminal by software, hardware or a combination of both, the apparatus comprising:
a coefficient determination module 41, configured to determine at least one scaling factor according to a region and a horizon where the target sedimentary rock is located, where each scaling factor is used to characterize a ratio of mass fractions of two minerals in the target sedimentary rock;
A data acquisition module 42 for acquiring mass fractions of elements in the target sedimentary rock by element logging;
and a composition analysis module 43, configured to obtain the mass fraction of each mineral in the target sedimentary rock according to the chemical molecular formula of each mineral in the target sedimentary rock, the scaling coefficients determined by the coefficient determination module 41, and the mass fraction of each element in the target sedimentary rock obtained by the data acquisition module 42.
In an alternative embodiment, the coefficient determination module 41 is configured to perform the following:
acquiring all-rock analysis data of a region and a horizon where a target sedimentary rock is located;
carrying out statistical analysis on the all-rock analysis data to obtain first mass fractions of each mineral, wherein the first mass fraction of one mineral is used for representing the average mass fraction of the mineral in the region and the horizon where the target sedimentary rock is located;
at least one scaling factor is obtained according to the first mass fraction of each mineral, wherein one scaling factor is the ratio of the first mass fractions of the corresponding two minerals.
In an alternative embodiment, the coefficient determination module 41 is configured to perform the following:
determining a ratio of the first mass fraction of gypsum to the first mass fraction of pyrite as a first ratio coefficient;
Determining the ratio of the first mass fraction of the potassium feldspar to the first mass fraction of the mica as a second proportionality coefficient;
determining the first mass fraction of montmorillonite and the average mass fraction of magnesium element in the region and the horizon where the target sedimentary rock is located as a third scaling factor;
the ratio of the first mass fraction of analcite to the first mass fraction of albite is determined as a fourth scaling factor.
In an alternative embodiment, the composition analysis module 43 is configured to perform step 13 and any possible implementation of step 13 in the above-described method embodiments.
It will be appreciated that the structure illustrated in the embodiments of the present invention does not constitute a particular limitation of the means for detecting the composition of minerals in the sedimentary rock. In other embodiments of the invention, the means for detecting the composition of minerals in the sedimentary rock may include more or less components than those shown, or certain components may be combined, or certain components may be split, or different arrangements of components may be provided. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
The embodiment of the invention also provides computer equipment, which comprises a processor and a memory, wherein at least one instruction, at least one section of program, code set or instruction set is arranged in the memory, and the instruction, the program, the code set or the instruction set is loaded and executed by the processor to realize the method for detecting mineral composition in sedimentary rock provided by the method embodiments.
The embodiment of the application also provides a computer readable storage medium, wherein at least one instruction, at least one section of program, code set or instruction set is stored in the storage medium, and the at least one instruction, the at least one section of program, the code set or instruction set is loaded and executed by a processor to realize the method for detecting mineral composition in sedimentary rock provided by the embodiments of the method.
Embodiments of the present application also provide a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium and the processor executes the computer instructions to cause the computer device to perform the method of detecting mineral composition in sedimentary rock as provided by the method embodiments described above.
It should be noted that not all the steps and modules in the above flowcharts and the system configuration diagrams are necessary, and some steps or modules may be omitted according to actual needs. The execution sequence of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or may be implemented jointly by some components in multiple independent devices.
In the above embodiments, the hardware module may be mechanically or electrically implemented. For example, a hardware module may include permanently dedicated circuitry or logic (e.g., a dedicated processor, FPGA, or ASIC) to perform the corresponding operations. The hardware modules may also include programmable logic or circuitry (e.g., a general-purpose processor or other programmable processor) that may be temporarily configured by software to perform the corresponding operations. The particular implementation (mechanical, or dedicated permanent, or temporarily set) may be determined based on cost and time considerations.
While the invention has been illustrated and described in detail in the drawings and in the preferred embodiments, the invention is not limited to the disclosed embodiments, and it will be appreciated by those skilled in the art that the code audits of the various embodiments described above may be combined to produce further embodiments of the invention, which are also within the scope of the invention.
Claims (3)
1. A method of detecting mineral composition in sedimentary rock, comprising:
determining at least one scaling factor according to the region and the horizon where the target sedimentary rock is located, wherein each scaling factor is used for representing the ratio of mass fractions of two minerals in the target sedimentary rock;
Acquiring mass fractions of elements in the target sedimentary rock through element logging;
obtaining the mass fraction of each mineral in the target sedimentary rock according to the chemical molecular formula of each mineral in the target sedimentary rock, the proportionality coefficient and the mass fraction of each element in the target sedimentary rock;
the determining at least one scaling factor according to the region and the horizon where the target sedimentary rock is located comprises:
acquiring all-rock analysis data of the region and the horizon where the target sedimentary rock is located;
carrying out statistical analysis on the all-rock analysis data to obtain first mass fractions of each mineral, wherein the first mass fraction of one mineral is used for representing the average mass fraction of the mineral in the region and the horizon where the target sedimentary rock is located;
determining a ratio of the first mass fraction of gypsum to the first mass fraction of pyrite as a first ratio coefficient;
determining the ratio of the first mass fraction of the potassium feldspar to the first mass fraction of the mica as a second proportionality coefficient;
determining the first mass fraction of montmorillonite and the average mass fraction of magnesium element in the region and the horizon where the target sedimentary rock is located as a third scaling factor;
determining the ratio of the first mass fraction of the analcite to the first mass fraction of the albite as a fourth scaling factor, wherein one scaling factor is the ratio of the first mass fractions of the corresponding two minerals;
The obtaining the mass fraction of each mineral in the target sedimentary rock according to the chemical molecular formula of each mineral in the target sedimentary rock, the proportionality coefficient and the mass fraction of each element in the target sedimentary rock comprises the following steps:
judgingWhether the quality is met or not is judged, wherein Fe is used for representing the mass fraction of iron element in the target sedimentary rock, S is used for representing the mass fraction of sulfur element in the target sedimentary rock, and a is used for representing the first proportional coefficient;
if it isIf so, determining that the mass fraction of pyrite in the target sedimentary rock is +.>And determining the mass fraction of illite in the target sedimentary rock as +.> And determining that the mass fraction of gypsum in the target sedimentary rock is a.Fe;
if it isIf not, determining that the mass fraction of pyrite in the target sedimentary rock is 2.1429Fe, determining that the mass fraction of illite in the target sedimentary rock is 0, and determining that the mass fraction of gypsum in the target sedimentary rock is a.Fe;
after determining the mass fraction of illite and gypsum in the target sedimentary rock, the method further includes:
judgingWhether the quality is met or not, wherein K is used for representing the mass fraction of potassium element in the target sedimentary rock, and YI is used for representing the mass fraction of illite in the target sedimentary rock;
If it isIf so, determining that the mass fraction of mica in the target sedimentary rock is +.>And determining the mass fraction of potassium feldspar in the target sedimentary rock as +.>Wherein b is used to characterize the second scaling factor;
if it isIf not, determining that the mass fractions of mica and potassium feldspar in the target sedimentary rock are 0;
determining the mass fraction of montmorillonite in the target sedimentary rock to be 6.3498 c-Mg, wherein Mg is used for representing the mass fraction of magnesium element in the target sedimentary rock, and c is used for representing the third scaling factor;
if it isAnd Ca is less than or equal to 0.2759Sg+0.275 c.Mg, determining that the mass fractions of calcite and dolomite in the target sedimentary rock are 0, wherein Ca is used for representing the mass fraction of calcium element in the target sedimentary rock, and Sg is used for representing the mass fraction of gypsum in the target sedimentary rock;
if it isAnd Ca>0.2759Sg+0.275 c.Mg, determining that the mass fraction of calcite in the target sedimentary rock is 2.5 Ca-0.6875c.Mg, and determining that the mass fraction of dolomite in the target sedimentary rock is 0;
if it isAnd Ca is less than or equal to 0.2759Sg+ (1.6667-1.3917 c) Mg-0.1346Tl, determining that the mass fraction of calcite in the target sedimentary rock is 0, and determining that the mass fraction of dolomite in the target sedimentary rock is (7.6667-7.6667 c) Mg-0.6193 YI;
If it isAnd Ca>0.2759Sg+ (1.6667-1.3917 c) Mg-0.1346 YI, determining that the mass fraction of calcite in the target sedimentary rock is 2.5Ca-2.5 (1.6667-1.3917 c) Mg-0.1346YI+0.2759Sg, and determining that the mass fraction of dolomite in the target sedimentary rock is (7.6667-7.6667 c) Mg-0.6193 YI;
after determining the mass fraction of montmorillonite in the target sedimentary rock, the method further includes:
judging whether Na is less than or equal to 0.0249Mt or not, wherein Na is used for representing the mass fraction of sodium element in the target sedimentary rock, and Mt is used for representing the mass fraction of montmorillonite in the target sedimentary rock;
if Na is less than or equal to 0.0249Mt, determining that the mass fractions of albite and analcite in the target sedimentary rock are 0;
if Na is less than or equal to 0.0249Mt, determining that the mass fraction of albite in the target sedimentary rock isDetermining the mass fraction of analcite in the target sedimentary rock as Nc.d, wherein Nc is used for representing the mass fraction of albite in the target sedimentary rock, and d is used for representing the fourth proportionality coefficient;
after determining the mass fractions of albite and analcite in the target sedimentary rock, the method further includes:
determining that the mass fraction of kaolinite in the target sedimentary rock is 4.7778 (Al-0.0971 Jc-0.1031Nc-0.1227Ff-0.1363 Yi-0.1772 Mt-0.2035 Ym), wherein Al is used for characterizing the mass fraction of aluminum element in the target sedimentary rock, jc is used for characterizing the mass fraction of potassium feldspar in the target sedimentary rock, nc is used for characterizing the mass fraction of albite in the target sedimentary rock, ff is used for characterizing the mass fraction of analcite in the target sedimentary rock, ym is used for characterizing the mass fraction of mica in the target sedimentary rock;
The mass fraction of quartz in the target sedimentary rock was determined to be 2.1429 (Si-0.3022 Jc-0.3206Nc-0.2545Ff-0.1885 YI-0.2171 Gl-0.3675Mt-0.2111 Ym), wherein Gl was used to characterize the mass fraction of kaolin in the target sedimentary rock.
2. A computer device comprising a processor and a memory having stored therein at least one instruction, at least one program, code set, or instruction set, the instruction, program, code set, or instruction set being loaded and executed by the processor to implement the method of detecting mineral composition in sedimentary rock of claim 1.
3. A computer readable storage medium having stored therein at least one instruction, at least one program, code set, or instruction set, the at least one instruction, the at least one program, the code set, or instruction set being loaded and executed by a processor to implement the method of detecting mineral composition in sedimentary rock of claim 1.
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