CN112946780B - Method and device for determining running and sliding fracture activity period - Google Patents
Method and device for determining running and sliding fracture activity period Download PDFInfo
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 3
- 239000010428 baryte Substances 0.000 claims description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
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Abstract
The invention discloses a method and a device for determining the activity period of a sliding fracture, wherein the method comprises the following steps: determining the construction activity period of a research area; determining a walk-slip fracture cutting horizon according to the three-dimensional seismic data, and classifying; determining the period, type and occurrence of the crack associated with the sliding fracture through core analysis; sampling different types of textures, and preparing a flake sample and a powder sample; carrying out mineralogical analysis on the slice sample to determine a diagenetic sequence; performing microelement measurement on the powder sample to determine the diagenetic degree; selecting a laser definite year organization, carrying out a definite year analysis test to form a definite year intersection chart, and marking an age value and an error range; the age value and the error range are cast into a target layer buried evolution history coordinate system of a research area, and an evolution sequence obtained by U-Pb definite year is established; and determining the running and sliding fracture activity period according to the construction burial evolution history, the diagenetic sequence and the U-Pb fixed year result. The invention can effectively comb out the period of the sliding fracture activity.
Description
Technical Field
The invention relates to the technical field of geological exploration and oil and gas exploration, in particular to a method and a device for determining the moving duration of a sliding fracture.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
The sliding fracture is an important factor for controlling storage and control reservoir in a sedimentary basin, and has important significance for oil and gas exploration. In recent years, particularly in the Tarim basin, a series of large oil fields such as Ha Laha Tang, north, south, ancient city, tower and the like have been discovered, all of which are controlled to different extents by slip breaks, which are both apparent as a constructive effect on the reservoir and formation, and often cause reservoir damage due to the multiple phases of mobility of the slip breaks. The method can objectively and accurately determine the slip fracture activity period, has important significance for knowing the reservoir distribution rule, the reservoir formation period and the like, and seriously influences the oil and gas exploration, development and production.
At present, in the prior art, a mature technology is formed by identifying and analyzing the seismic data of the sliding fracture, judging the development direction and calculating the sliding displacement, but the judgment of the sliding fracture activity period is always a research difficulty. Although some researches can generally determine the activity period of the fracture, the problem of specifying the event of the early activity is still not solved under the condition that the walking and sliding fracture is performed again or later in multiple stages, and each activity of the walking and sliding fracture can play an important role in storage and accumulation, so how to accurately specify the activity period and the period of the walking and sliding fracture is a technical problem to be solved urgently at present.
Disclosure of Invention
The embodiment of the invention provides a method for determining the activity period of a sliding fracture, which is used for accurately determining the activity period and the activity period of the sliding fracture, and comprises the following steps: determining the construction activity period of a research area; determining a walk-slip fracture cutting layer according to the three-dimensional seismic data of the research area, and classifying the walk-slip fracture; determining the period, type and shape of the fracture associated with the sliding fracture through core analysis along the sliding fracture distribution; sampling hole filling materials, megacrystal calcite and crack calcite, and manufacturing a flake sample and a powder sample; carrying out mineralogical analysis on the slice sample to determine a diagenetic sequence; performing microelement measurement on the powder sample to determine the diagenetic degree; selecting a laser definite year organization according to the mineralogical analysis result of the sheet sample, and carrying out definite year analysis and test to form a definite year intersection chart, and marking an age value and an error range; the age value and the error range obtained by the test are cast into a target layer buried evolution history coordinate system of a research area, an evolution sequence obtained by U-Pb definite year is established, and a U-Pb definite year result is obtained; and determining the running and sliding fracture activity period of the research area according to the construction burial evolution history, the diagenetic sequence and the U-Pb fixed-year result of the research area.
The embodiment of the invention also provides a device for determining the activity period of the sliding fracture, which is used for accurately determining the activity period and the activity period of the sliding fracture, and comprises the following steps: the construction period acquisition module is used for determining the construction activity period of the research area; the walk-slip fracture type determining module is used for determining a walk-slip fracture cutting layer according to the three-dimensional seismic data of the research area and classifying the walk-slip fracture; the core analysis module is used for determining the period, type and occurrence of the crack associated with the sliding fracture through core analysis along the sliding fracture distribution; the sampling module is used for sampling the hole filler, the megasonic calcite and the crack calcite and manufacturing a flake sample and a powder sample; the diagenetic sequence determining module is used for carrying out mineralogical analysis on the slice sample to determine diagenetic sequences; the diagenetic change degree determining module is used for measuring microelements of the powder sample and determining diagenetic change degree; the definite year analysis module is used for selecting a laser definite year organization according to the mineral petrology analysis result of the sheet sample, carrying out definite year analysis and test to form a definite year intersection chart, and marking an age value and an error range; the U-Pb definite-year result acquisition module is used for throwing the age value and the error range obtained by the test into a target layer buried evolution history coordinate system of a research area, and establishing an evolution sequence obtained by U-Pb definite-year to obtain a U-Pb definite-year result; and the sliding fracture activity period number determining module is used for determining the sliding fracture activity period number of the research area according to the construction burial evolution history, the diagenetic sequence and the U-Pb fixed year result of the research area.
The embodiment of the invention also provides a computer device for accurately determining the activity period and the period of the slip break, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the method for determining the activity period of the slip break when executing the computer program.
The embodiment of the invention also provides a computer readable storage medium for accurately determining the activity period and the period of the skid break, and the computer readable storage medium stores a computer program for executing the method for determining the activity period of the skid break.
In the embodiment of the invention, after the construction activity period of a research area is determined, a sliding fracture cutting layer is determined according to three-dimensional seismic data of the research area, sliding fractures are classified, the period, type and yield of a sliding fracture associated crack are determined through core analysis distributed along the sliding fractures, hole fillers, macrocrystalline calcites and crack calcites are respectively sampled, a slice sample and a powder sample are manufactured, mineral petrography analysis is carried out on the slice sample, a diagenetic sequence is determined, trace element measurement is carried out on the powder sample, the diagenetic degree is determined, and then according to the mineral petrography analysis result of the slice sample, a laser diagenetic structure is selected, a diagenetic analysis test is carried out, a diagenetic intersection graph is formed, an age value and an error range are marked, the age value and the error range obtained by the test are cast into a target layer buried evolution history coordinate system of the research area, a U-Pb stationary year result is obtained, and finally the sliding fracture period of the research area is determined according to the construction buried year history, diagenetic sequence and U-stationary year result of the research area. By the embodiment of the invention, the period of the slip fracture activity is effectively combed, and important guidance is provided for reservoir formation and oil and gas reservoir.
Drawings
In order to more clearly illustrate the embodiments of the 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, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a flow chart of a method for determining the duration of a slip break event according to an embodiment of the present invention;
FIG. 2 is a flowchart of a specific implementation of a method for determining the duration of a slip break according to an embodiment of the present invention;
FIG. 3 is a schematic view of a calcite sheet provided in an embodiment of the present invention;
FIG. 4 is a schematic view of a calcite cathodoluminescence according to an embodiment of the present invention;
FIG. 5 is a graph of the annual results of a calcite H1-1 set provided in the examples of the present invention;
FIG. 6 is a graph showing the annual results of a macrocrystalline calcite H1-2 structure according to the present invention;
FIG. 7 is a graph showing the intersection of Mn and Sr of different types of calcites according to an embodiment of the present invention;
FIG. 8 is a graph of a combination of annual results and burial history provided in an embodiment of the present invention;
FIG. 9 is a schematic diagram of a device for determining the duration of a slip break according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a computer device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. The exemplary embodiments of the present invention and their descriptions herein are for the purpose of explaining the present invention, but are not to be construed as limiting the invention.
An embodiment of the present invention provides a method for determining the duration of a sliding fracture, and fig. 1 is a flowchart of a method for determining the duration of a sliding fracture, as shown in fig. 1, where the method includes the following steps:
s101, determining the construction activity period of a research area;
it should be noted that, in the embodiment of the present invention, the structural activity period of the research area includes the geologic period corresponding to the following structural movement: the method comprises the following steps of california stage construction movement, sea western stage construction movement, printing stage construction movement, yanshan stage construction movement and mountain happiness stage construction movement. In specific implementation, the activity period can be constructed by combing the area through the geological background of the investigation area.
S102, determining a walk-slip fracture cutting layer according to the three-dimensional seismic data of the research area, and classifying the walk-slip fracture.
In the embodiment of the invention, the walk-slip fracture cutting horizon is determined according to the walk-slip fracture interpretation of the three-dimensional seismic data volume, and the preliminary classification is carried out, and the method comprises the following steps: left-hand slide break and right-hand slide break. The classification of the skid break in the embodiment of the invention comprises the following steps: zhonghanwu system-Zhongao Tao Tong, zhonghanwu system-dyad system and Zhonghanwu system-chalky system top.
S103, determining the period, type and occurrence of the fracture associated with the sliding fracture through core analysis along the sliding fracture distribution.
In the embodiment of the invention, the secondary fracture period, the type and the occurrence of the sliding fracture are determined by detailed observation of the drilling core distributed along the sliding fracture, and the method mainly comprises the following steps: the relation between the distribution of the coring wells and the sliding fracture; the relation between the position of the coring section and the target layer; the occurrence of slip fracture associated fractures includes: a high angle structural seam, a low angle structural seam, and a parallel layer seam; the filling conditions of the slip fracture associated cracks comprise: full fill, partial fill, and unfilled; the filling mineral components of the slip fracture associated cracks comprise calcite filling, dolomite filling, argillaceous filling and special mineral filling, and the special minerals comprise barite, celestite, fluorite and quartz; cutting relationship of different types of cracks; other calcite fillers are described, mainly comprising pore-filled calcite and thicker layers of macrocrystalline calcite, and the cutting relationship between the pore-filled calcite and the cracks is described as the calibration of the crack period.
S104, sampling the hole filling material, the macrocrystalline calcite and the cracked calcite, and manufacturing a flake sample and a powder sample.
In the embodiment of the invention, sampling is performed for different types of configurations (hole filling, megacalcite and crack calcite), and then indoor film-making is performed according to the characteristics of the sampled products, wherein the film-making types comprise: cathode luminescence and laser U-Pb definite year tablet. Wherein the crack calcite is marked with clear period relation. The sample size was guaranteed to be sufficient to grind 3 sets of flakes and 1g calcite powder sample. Indoor sample processing, according to the sample characteristic of taking a sample, carry out indoor film-making, the film-making type includes: cathode luminescence and laser U-Pb definite year sheet; the sheet should be ensured to run vertically along the crack, and the sheet should include as much filler as possible throughout the growth process.
S105, performing mineralogical analysis on the slice sample to determine a diagenetic sequence; trace element measurement is carried out on the powder sample to determine the rock formation alteration degree.
On the basis of the understanding of calcite occurrence, such as crack development, hole development and cave development, the cathodoluminescence characteristics are further observed to determine whether the calcite of the same occurrence has the cathodoluminescence characteristics and the girdle characteristics which are obviously different, and further, the calcite filling is classified according to occurrence and cathodoluminescence characteristics.
In one embodiment, the degree of diagenetic alteration may be determined by: measuring the content of Mn element and Sr element; and determining the rock formation alteration degree according to the content ratio of Mn element to Sr element.
In the concrete implementation, a trace element test is carried out by using a powder sample, the Mn, sr, U, pb content is mainly analyzed, the diagenetic change degree is determined according to the Mn/Sr ratio, if the Mn/Sr is smaller than 1, the diagenetic change is determined to be weakened, and the diagenetic change represents the formation of the geochemical information; if Mn/Sr is greater than 1, it is judged that diagenetic changes are strong, which represents the formation information after diagenetic transformation.
S106, selecting a laser definite year organization according to the mineralogical analysis result of the sheet sample, and carrying out a definite year analysis test to form a definite year intersection chart, and marking an age value and an error range.
In practice, the growth direction is analyzed according to mineralogy to determine the annual organization, according to the type of calcite determined. The formation of the definite-year analysis structure in the same period is ensured as far as possible, and more than 40 laser stripping points are needed; calcite of the same composition type should be analyzed for years separately in cases where cathodoluminescence shows significant growth in multiple phases, and ensuring that each set of laser ablation sites is above 40. At the time of the year-fixing test, carrying out the year-fixing analysis by utilizing the LA-ICP-MS aiming at the selected analysis configuration; and (5) after the test is finished, re-observing the sheet, and confirming the accuracy of the laser dotting position.
And S107, throwing the age value and the error range obtained by the test into a target layer burial evolution history coordinate system of a research area, and establishing an evolution sequence obtained by U-Pb definite year to obtain a U-Pb definite year result.
In the specific implementation, the measured age value and the error range are cast into a target layer buried evolution history coordinate system of a research area, and an evolution sequence obtained by U-Pb definite year is established. Further, comparing the age value obtained by the test with the structural evolution history of the research area, and determining whether the age value is directly related to the structural activity period of the research area.
Furthermore, the method for determining the running slip break activity period provided in the embodiment of the present invention may further include the following steps: comparing the evolution sequence obtained by the U-Pb definite year with the structure cutting relation, and checking whether the sequence is inconsistent or not; if so, the diagenetic sequence and diagenetic extent are redetermined (i.e., return to core and petrographic analysis, further carding diagenetic sequence relationships and diagenetic extent). Years of results with a strong degree of diagenetic alteration, possibly younger than the period of formation of the organization, should be regressed with the aid of a cleavage relationship of the organization.
S108, determining the running slip fracture activity period of the research area according to the construction burial evolution history, the diagenetic sequence and the U-Pb fixed year result of the research area.
The running slip fracture activity period of the research area in the embodiment of the invention can comprise the following steps: middle or Tao Shi, late or Tao Shi, early carbo, late carbo, early two fold, late dwarf Luo Shi.
After determining the running slip fracture activity period of the research area according to the construction burial evolution history, the diagenetic sequence and the U-Pb annual results of the research area, the running slip fracture activity period determination method provided by the embodiment of the invention can further comprise the following steps: and establishing a fracture activity development mode according to the cycle and the period of the sliding fracture activity of the research area.
Fig. 2 is a flowchart of a specific implementation of a method for determining a running slip break activity period according to an embodiment of the present invention, where, as shown in fig. 2, the method specifically includes:
s201, determining the activity period of the region construction. Constructing the activity period comprises: the mountain making movement of each period of the basin level, the ancient generation comprises the Jia Li Dong period construction movement and the He xi period construction movement; the middle-aged generation comprises a printing period construction exercise, a Yanshan period construction exercise and a new generation's mountain-like period construction exercise.
Specifically, the research area is determined to undergo the Gardney stage construction movement, the Sharpness stage construction movement, the seal stage construction movement, the Yanshan stage construction movement and the Hill stage construction movement mainly through regional geological background investigation. Further, the corresponding geologic time of each period of structural movement is defined.
S202, determining the sliding fracture cutting horizon. And determining a sliding fracture cutting horizon by utilizing the three-dimensional seismic data, and generally classifying the sliding fracture.
Specifically, in the study example, according to the walk-break-through horizon, there are three walk-break types, including: zhonghanwu system-Zhongao Tao Tong, zhonghanwu system-dyad system and Zhonghanwu system-chalky system top.
S203, determining the secondary, type and occurrence of the crack associated with the sliding fracture. And determining the secondary, type and occurrence of the associated cracks of the sliding fracture through observation and description of the cracks and the associated calcite in the core.
Specifically, the fracture-describing parameters include: fracture occurrence, fracture scale, fracture packing, and cutting relationship. Wherein the fracture occurrence comprises a high angle structural joint, a low angle structural joint and a parallel layer surface joint; crack dimensions include slit width and extension length; crack filling conditions include full fill, partial fill, and unfilled, as well as filled mineral compositions including calcite fill, dolomite fill, argillite fill, and special mineral fills, special minerals including barite, celestite, fluorite, and quartz; cutting relationship of different types of cracks; further, other calcite fillers are described, mainly comprising pore-filled calcite and thicker layers of macrocrystalline calcite, and their cutting relationship to the fracture is described as a calibration of fracture period.
S204, sampling and preparing samples. Samples were taken for different types of configurations, including pore fillers, macrocrystalline calcite and cracked calcite. Wherein the crack calcite is marked with clear period relation. The sample size was guaranteed to be sufficient to grind 3 sets of flakes and 1g calcite powder sample.
Specifically, according to the characteristics of the sampled product, indoor tabletting is carried out, and the tabletting types comprise: cathode luminescence and laser U-Pb definite year sheet; for hole samples and crack samples, the cathodoluminescence and laser annual production needs to ensure the vertical crack trend, and the slice comprises the whole growth process of the filling as much as possible. For the megacalcite, 2-3 sets of cathode luminescent sheets and laser annual sheets need to be ground to conveniently evaluate whether the calcite has annulus growth.
S205, calcite mineralogy analysis. Based on classifying and staging the cracks on the core, performing a mineralogical analysis of calcite by using a cathode luminescent sheet and a common piece, comprising: crystal size, crystal growth mode, whether there is annulus feature or not, cathodoluminescence feature.
Specifically, the growth period of the interior of calcite crystals can be judged according to cathodoluminescence, as shown in fig. 3 and 4, the macrocrystalline calcite develops two periods of H1-1 and H1-2, the H1-1 crystals are optically undersransparent, the cathodoluminescence is orange uniform luminescence, the H1-2 crystals are transparent, and the cathodoluminescence is represented as dim luminescence to orange luminescence and has the characteristic of ring belt growth.
S206, selecting and testing the annual configuration. And selecting a laser fixed-year organization according to analysis knowledge of calcite mineral petrology, and carrying out laser dotting design. Specifically, the laser annual target should select the organization formed in the same period as far as possible, as shown in fig. 3, and laser annual test is performed on different organization of the same sample. And more than 40 points should be reached for each set of laser ablation points. After the stripping point is selected, carrying out fixed-year analysis by utilizing LA-ICP-MS; and (5) after the test is finished, the thin sheet is observed again, and the accuracy of the laser dotting position is confirmed. After the test, a definite-year intersection chart is formed, and age range, error range and denudation point number information are marked, as shown in fig. 5 and 6.
S207, evaluating the diagenetic degree. Carrying out microelement tests correspondingly by using powder samples, carrying out key analysis on Mn, sr, U, pb content, and determining the diagenetic change degree according to the Mn/Sr ratio, specifically, as shown in fig. 7, judging that diagenetic corrosion is weakened when Mn/Sr is smaller than 1, and considering that the diagenetic corrosion represents the localization information during formation; mn/Sr is greater than 1, and the diagenetic change is judged to be strong, which represents the localization information after diagenetic transformation after formation.
S208, verifying the fixed-year result. And casting the measured age value and the error range into a target layer buried evolution history coordinate system of a research area, and establishing an evolution sequence obtained by U-Pb definite year. As shown in fig. 8, this age data is compared to the structural evolution history to determine if the age value is directly related to the primary structural activity period. Further, the sequence is compared with the structure cutting relation, and whether the contradiction exists in the sequence is checked. If there is inconsistency, the core and petrographic analysis should be returned, and the diagenetic sequence relationship and diagenetic alteration degree should be further combed. Years of results with a strong degree of diagenetic alteration, possibly younger than the period of formation of the organization, should be regressed with the aid of a cleavage relationship of the organization.
S209, determining the fracture activity period. And determining the primary period of the fracture activity according to the construction burial evolution history, the diagenetic sequence and the U-Pb fixed-year result. Specifically, as shown in fig. 8, the period of 7-phase fracture activity was identified as middle or Tao Shi, late or Tao Shi, early carboworld, late carboworld, early two-fold world, late dwarf Luo Shi, respectively. The above knowledge of the period of fracture activity is of great significance for reservoir formation and oil and gas reservoirs.
From the above, the method for determining the activity period of the sliding fracture provided by the embodiment of the invention determines the activity period of the regional structure, including mountain making movements of each period of the basin level; then, explaining the sliding fracture in the three-dimensional seismic data volume, defining a sliding fracture cutting horizon, and primarily classifying; then, determining the secondary, type and occurrence of the fracture associated with the sliding fracture according to the core observation; sampling according to the knowledge of the cracks by core observation, and ensuring the amount of 3 sets of slices and 1g of calcite for different types of cracks; after grinding the thin sheet, firstly observing the cathode luminescence characteristics, analyzing calcite crystal characteristics, selecting a regional definite year organization position according to the growth condition, and carrying out laser definite year analysis; and (5) throwing points to the target layer buried evolution history from the test result, and determining the running and sliding fracture activity period. The method provided by the embodiment of the invention can systematically determine the activity period and the specific period of the slip fracture so as to more objectively know the construction activity period, the fluid activity period and the reservoir period.
Based on the same inventive concept, the embodiment of the invention also provides a device for determining the running slip break activity period, as described in the following embodiment. Because the principle of the device for solving the problems is similar to that of the method for determining the running-slip fracture activity period, the implementation of the device can be referred to the implementation of the method for determining the running-slip fracture activity period, and the repetition is not repeated.
Fig. 9 is a schematic diagram of a device for determining the duration of a slip break according to an embodiment of the present invention, as shown in fig. 9, the device includes: the system comprises a construction period acquisition module 901, a sliding fracture type determination module 902, a core analysis module 903, a sampling module 904, a diagenetic sequence determination module 905, a diagenetic alteration degree determination module 906, a definite year analysis module 907, a U-Pb definite year result acquisition module 908 and a sliding fracture activity period determination module 909.
The construction period acquisition module 901 is used for determining construction activity period of a research area; the walk-slip fracture type determining module 902 is configured to determine a walk-slip fracture cutting horizon according to three-dimensional seismic data of the research area, and classify the walk-slip fracture; the core analysis module 903 is configured to determine the period, type and occurrence of the fracture associated with the sliding fracture through core analysis along the sliding fracture distribution; the sampling module 904 is used for sampling the hole filler, the megasonic calcite and the crack calcite to prepare a flake sample and a powder sample; a diagenetic sequence determination module 905 for performing a mineralogical analysis on the sheet sample to determine a diagenetic sequence; the diagenetic degree determining module 906 is used for performing microelement measurement on the powder sample to determine diagenetic degree; the definite year analysis module 907 is used for selecting a laser definite year organization according to the mineral petrography analysis result of the sheet sample, carrying out definite year analysis and test to form a definite year intersection chart, and marking an age value and an error range; the U-Pb definite-year result acquisition module 908 is used for casting the age value and the error range obtained by the test into a target layer buried evolution history coordinate system of the research area, and establishing an evolution sequence obtained by U-Pb definite-year to obtain a U-Pb definite-year result; the step fracture activity period determining module 909 is configured to determine the step fracture activity period of the research area according to the structural buried evolution history, the diagenetic sequence and the U-Pb annual results of the research area.
In one embodiment, as shown in fig. 9, a device for determining the running slip break activity period provided in the embodiment of the present invention may further include: the fracture activity development mode determining module 910 is configured to establish a fracture activity development mode according to the cycle and the period of the sliding fracture activity of the study area.
In one embodiment, the U-Pb fix results acquisition module 908 is further configured to compare the age value obtained by the test with the history of structural evolution of the study area, and determine whether the age value is directly related to the structural activity period of the study area.
In one embodiment, as shown in fig. 9, a device for determining the running slip break activity period provided in the embodiment of the present invention may further include: the U-Pb definite year result verification module 911 is used for comparing the evolution sequence obtained by U-Pb definite year with the structure cutting relationship and checking whether the sequence is inconsistent or not; if so, the diagenetic sequence and diagenetic extent are redetermined.
In one embodiment, the diagenetic change degree determination module 906 is further configured to: measuring the content of Mn element and Sr element; and determining the rock formation alteration degree according to the content ratio of Mn element to Sr element.
Based on the same inventive concept, a computer device is further provided in the embodiment of the present invention, which is used to accurately determine the activity period and the period of the slip break, and fig. 10 is a schematic diagram of a computer device provided in the embodiment of the present invention, as shown in fig. 10, where, as shown in fig. 10, the computer device 10 includes a memory 11, a processor 12, and a computer program stored in the memory 11 and capable of running on the processor 12, and the processor 12 implements the method for determining the activity period of the slip break when executing the computer program.
Based on the same inventive concept, the embodiment of the invention also provides a computer readable storage medium for accurately determining the activity period and the period of the skid break, wherein the computer readable storage medium stores a computer program for executing the method for determining the activity period of the skid break.
In summary, the embodiment of the invention provides a method, a device, a computer device and a computer readable storage medium for determining the activity period of a sliding fracture, which are used for determining the three-dimensional seismic data of a research area after determining the activity period of the construction of the research area, determining a sliding fracture cutting layer, classifying the sliding fracture, determining the period, the type and the occurrence of a sliding fracture associated crack through core analysis distributed along the sliding fracture, sampling hole fillers, megacrystal calcite and crack calcite respectively, manufacturing a sheet sample and a powder sample, performing mineralogical analysis on the sheet sample, determining a rock formation sequence, performing trace element measurement on the powder sample, determining the degree of rock formation alteration, selecting a laser definite year structure according to the mineralogical analysis result of the sheet sample, performing definite year analysis test, forming a definite year intersection map, marking an age value and an error range, casting the age value and the error range obtained by the test into a target layer evolution history coordinate system of the research area, and establishing a U-Pb definite year obtained evolution sequence to obtain a U-Pb definite year sequence, and finally obtaining the definite year of the sliding fracture according to the mineralogical analysis result of the mining area and the buried year structure of the sheet sample. By the embodiment of the invention, the period of the slip fracture activity is effectively combed, and important guidance is provided for reservoir formation and oil and gas reservoir.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. A method for determining the number of slip break events, comprising:
determining the construction activity period of a research area;
determining a walk-slip fracture cutting layer according to the three-dimensional seismic data of the research area, and classifying the walk-slip fracture;
determining the period, type and shape of the fracture associated with the sliding fracture through core analysis along the sliding fracture distribution;
sampling hole filling materials, megacrystal calcite and crack calcite, and manufacturing a flake sample and a powder sample;
carrying out mineralogical analysis on the slice sample to determine a diagenetic sequence; performing microelement measurement on the powder sample to determine the diagenetic degree;
selecting a laser definite year organization according to the mineralogical analysis result of the sheet sample, and carrying out definite year analysis and test to form a definite year intersection chart, and marking an age value and an error range;
dropping the age value and the error range obtained by the test into a target layer burial evolution history coordinate system of the research area, and establishing an evolution sequence obtained by U-Pb definite year to obtain a U-Pb definite year result;
determining the running and sliding fracture activity period of the research area according to the construction burial evolution history, the diagenetic sequence and the U-Pb fixed-year result of the research area;
wherein, sample hole filler, megacalcite and crack calcite, make thin slice sample and powder sample, include:
sampling hole filler, megacrystal calcite and crack calcite, and performing indoor tabletting according to the characteristics of the sampled products, wherein the tabletting types comprise: cathode luminescence and laser U-Pb definite year sheet; wherein the crack calcite is marked with clear period relation; the sample size is guaranteed to be sufficient to grind 3 sets of flakes and 1g calcite powder sample;
indoor sample processing, according to the sample characteristic of taking a sample, carry out indoor film-making, the film-making type includes: cathode luminescence and laser U-Pb definite year sheet; the flaking needs to ensure the vertical crack trend, and the flake comprises the whole growth course of the filler;
wherein the slice sample is subjected to mineralogical analysis to determine a diagenetic sequence; performing microelement measurements on the powder sample to determine the extent of diagenetic alteration, comprising:
further observing the cathodoluminescence characteristics on the basis of the knowledge of calcite occurrence including crack occurrence, hole occurrence and cave occurrence, and determining whether the same occurrence of calcite has significantly different cathodoluminescence characteristics and girdle characteristics; classifying calcite fillers according to the occurrence of the cathode luminescence;
wherein, carry out microelement measurement to the powder sample, confirm the diagenetic degree of changing, include:
measuring the content of Mn element and Sr element; determining the rock formation alteration degree according to the content ratio of Mn element to Sr element; if Mn/Sr is less than 1, the diagenetic corrosion is judged to be weakened, and the diagenetic corrosion represents the formation of the geochemical information; if Mn/Sr is greater than 1, the diagenetic change is judged to be strong, and the diagenetic change represents the formation of the geochemical information after diagenetic change.
2. The method of claim 1, wherein after determining the life span of the skid fracture of the study area based on the history of structural burial evolution, diagenetic sequences, and U-Pb dating results of the study area, the method further comprises:
and establishing a fracture activity development mode according to the cycle and the period of the sliding fracture activity of the research area.
3. The method of claim 1, wherein dropping the age value and the error range obtained by the test into the target layer buried evolution history coordinate system of the research area, and establishing an evolution sequence obtained by the fixed year of the U-Pb, to obtain the fixed year result of the U-Pb, comprises:
comparing the age value obtained by the test with the structural evolution history of the research area, and determining whether the age value is directly related to the structural activity period of the research area.
4. A method as claimed in claim 3, wherein the method further comprises:
comparing the evolution sequence obtained by the U-Pb definite year with the structure cutting relation, and checking whether the sequence is inconsistent or not;
if so, the diagenetic sequence and diagenetic extent are redetermined.
5. The method of claim 3, wherein the formation activity period of the investigation region comprises a geologic time corresponding to a formation movement of: the method comprises the following steps of california stage construction movement, sea western stage construction movement, printing stage construction movement, yanshan stage construction movement and mountain happiness stage construction movement.
6. The method of claim 5, wherein classifying the skid break comprises: midcold arm system-zhong ao Tao Tong, midcold arm system-dyad system and midcold arm system-chalky system tops; the occurrence of the slip fracture associated fracture comprises: a high angle structural seam, a low angle structural seam, and a parallel layer seam; the filling conditions of the slip fracture associated cracks comprise: full fill, partial fill, and unfilled; the filling mineral components of the slip fracture associated cracks comprise calcite filling, dolomite filling, argillaceous filling and special mineral filling, and the special minerals comprise barite, celestite, fluorite and quartz; the cycle of the skid fracture activity of the research area comprises the following steps: middle or Tao Shi, late or Tao Shi, early carbo, late carbo, early two fold, late dwarf Luo Shi.
7. A device for determining the number of slip break events, comprising:
the construction period acquisition module is used for determining the construction activity period of the research area;
the sliding fracture type determining module is used for determining a sliding fracture cutting layer according to the three-dimensional seismic data of the research area and classifying sliding fracture;
the core analysis module is used for determining the period, type and occurrence of the crack associated with the sliding fracture through core analysis along the sliding fracture distribution;
the sampling module is used for sampling the hole filler, the megasonic calcite and the crack calcite and manufacturing a flake sample and a powder sample;
the diagenetic sequence determining module is used for carrying out mineralogical analysis on the slice sample to determine diagenetic sequences;
the diagenetic change degree determining module is used for measuring microelements of the powder sample and determining diagenetic change degree;
the definite year analysis module is used for selecting a laser definite year organization according to the mineral petrology analysis result of the sheet sample, carrying out definite year analysis and test to form a definite year intersection chart, and marking an age value and an error range;
the U-Pb fixed year result acquisition module is used for throwing the age value and the error range obtained by the test into the target layer buried evolution history coordinate system of the research area, and establishing an evolution sequence obtained by U-Pb fixed year to obtain a U-Pb fixed year result;
the sliding fracture activity period determining module is used for determining the sliding fracture activity period of the research area according to the construction burial evolution history, the diagenetic sequence and the U-Pb fixed-year result of the research area;
wherein, sampling module specifically is used for:
sampling hole filler, megacrystal calcite and crack calcite, and performing indoor tabletting according to the characteristics of the sampled products, wherein the tabletting types comprise: cathode luminescence and laser U-Pb definite year sheet; wherein the crack calcite is marked with clear period relation; the sample size is guaranteed to be sufficient to grind 3 sets of flakes and 1g calcite powder sample;
indoor sample processing, according to the sample characteristic of taking a sample, carry out indoor film-making, the film-making type includes: cathode luminescence and laser U-Pb definite year sheet; the flaking needs to ensure the vertical crack trend, and the flake comprises the whole growth course of the filler;
the diagenetic sequence determining module is used for carrying out mineralogical analysis on the slice sample to determine diagenetic sequences; the diagenetic degree determining module is used for performing microelement measurement on the powder sample to determine diagenetic degree, and comprises the following components:
further observing the cathodoluminescence characteristics on the basis of the knowledge of calcite occurrence including crack occurrence, hole occurrence and cave occurrence, and determining whether the same occurrence of calcite has significantly different cathodoluminescence characteristics and girdle characteristics; classifying calcite fillers according to the occurrence of the cathode luminescence;
the diagenetic change degree determining module is specifically used for:
measuring the content of Mn element and Sr element; determining the rock formation alteration degree according to the content ratio of Mn element to Sr element; if Mn/Sr is less than 1, the diagenetic corrosion is judged to be weakened, and the diagenetic corrosion represents the formation of the geochemical information; if Mn/Sr is greater than 1, the diagenetic change is judged to be strong, and the diagenetic change represents the formation of the geochemical information after diagenetic change.
8. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of determining the number of slip break events according to any of claims 1 to 6 when the computer program is executed by the processor.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program that performs the method of determining the slip break activity period according to any one of claims 1 to 6.
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