CN113376694A - Method and device for judging activity of fault basin, electronic equipment and storage medium - Google Patents
Method and device for judging activity of fault basin, electronic equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and a device for judging activity of a fault basin, electronic equipment and a storage medium. The activity judgment method of the fault basin comprises the following steps: determining a hollow groove area and a slope area of the fractured basin according to the position of the fault of the boundary of the fractured basin; determining the buried depth of each stratum interface in the depression groove area and the slope area; and determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area. According to the embodiment of the invention, the activity of the boundary fault of the fault trap is accurately judged by analyzing the difference of the stratum buried depth of each part in the fault trap, so that the accuracy of judging the activity of the fault trap lacking stratum deposition or denuded stratum of a boundary fault rising disc is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of geological exploration, in particular to a method and a device for judging activity of a fault basin, electronic equipment and a storage medium.
Background
In the technical field of geological exploration, the accurate judgment of the mobility of the fractured basin has important guiding significance for reliably predicting a deposition system, an oil and gas reservoir type, the distribution of the oil and gas reservoir type and the like in the basin, and provides basic geological theoretical support for the oil and gas exploration and development of the fractured basin.
Common fault activity analysis methods include fault growth index and fault landing. The analysis diagram of the fault growth index method is shown in fig. 1, and the fault growth index refers to the ratio of the thickness of the upper plate to the thickness of the lower plate on the fault. When the fault growth index is 1, the thicknesses of two disks of the fault are equal, and the fault is inactive; when the fault growth index is larger than 1, the thickness of the upper plate is larger than that of the lower plate, the fault moves and is a positive fault; when the fault growth index is less than 1, the thickness of the upper plate is smaller than that of the lower plate, the fault moves, and the fault is a reverse fault. A larger positive fault growth index or a smaller reverse fault growth index indicates stronger fault activity. The schematic analysis diagram of the fault throw method is shown in fig. 2, the fault throw refers to the vertical distance between two disks of equivalent layers on a section perpendicular to the direction of the fault, and is also called vertical fault slip distance, and the amplitude of the difference lifting of the two disks of the fault can be reflected.
Therefore, the fault growth index method and the fault landing method are suitable for faults with stratums in both discs. And the rising disc of the fault at the boundary of the fault trap basin is often lack of stratum deposition or the stratum is degraded, and the stratum deposition thickness of the rising disc cannot be accurately obtained. Therefore, the fault growth index method and the fault throw method are not suitable for the activity analysis of fault at the boundary of the fault trap basin.
Disclosure of Invention
The embodiment of the invention provides a method and a device for judging the activity of a fault basin, electronic equipment and a storage medium, which improve the accuracy of judging the activity of the fault basin in which a boundary fault rising disc lacks stratum deposition or stratum is degraded.
In a first aspect, an embodiment of the present invention provides a method for determining activity of a collapsed basin, including:
determining a hollow groove area and a slope area of the fractured basin according to the position of the fault of the boundary of the fractured basin;
determining the buried depth of each stratum interface in the depression groove area and the slope area;
and determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area.
In a second aspect, an embodiment of the present invention further provides an apparatus for determining activity of a collapsed basin, including:
the area determination module is used for determining a hollow groove area and a slope area of the fractured basin according to the position of the fault of the boundary of the fractured basin;
the stratum buried depth determining module is used for determining the buried depth of each stratum interface in the depression groove area and the slope area;
and the activity determination module is used for determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area.
In a third aspect, an embodiment of the present invention further provides an electronic device, including:
one or more processors;
a storage device for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors implement the method for determining activity of a collapsed basin according to any embodiment of the present invention.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for determining activity of a collapsed basin according to any embodiment of the present invention.
According to the embodiment of the invention, a hollow groove area and a slope area of the fractured basin are determined according to the position of the fault of the boundary of the fractured basin; determining the buried depth of each stratum interface in the depression groove area and the slope area; and determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area. According to the embodiment of the invention, the activity of the boundary fault of the fault trap is accurately judged by analyzing the difference of the stratum buried depth of each part in the fault trap, so that the accuracy of judging the activity of the fault trap lacking stratum deposition or denuded stratum of a boundary fault rising disc is improved.
Drawings
FIG. 1 is a schematic diagram of a fault growth index method in the background art;
FIG. 2 is a schematic diagram of a fault landing method in the background art;
FIG. 3 is a flowchart of a method for determining activity of a collapsed basin according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of the fitting result of the piecewise broken line of the buried depth difference between the hollow area and the slope area according to the first embodiment of the present invention;
FIG. 5 is an illustration of an actual seismic section of a fracture basin;
FIG. 6 is a plot of the difference in burial depth of each stratigraphic interface of a fault at the boundary of a fault basin;
fig. 7 is a schematic structural diagram of an apparatus for determining activity of a collapsed basin according to a second embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device in a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 3 is a flowchart of a method for judging activity of a fault basin in the first embodiment of the present invention, which is applicable to judging activity of a fault basin, and is particularly applicable to judging activity of a fault basin in which a boundary fault rising tray lacks stratigraphic deposition or a stratigraphic is degraded. The method can be executed by an activity determination apparatus for a fault basin, which can be implemented in software and/or hardware and can be configured in an electronic device, for example, the electronic device can be a device with communication and computing capabilities, such as a background server. As shown in fig. 3, the method specifically includes:
and 301, determining a hollow groove area and a slope area of the fractured basin according to the position of the fault of the boundary of the fractured basin.
The shape of the subsidence basin is controlled by the fault line and is mostly in a long and narrow strip shape. The edge of the basin is composed of a fault cliff, the gradient is steep, and the side line is generally a fault line. However, the rising tray of the fault at the boundary of the fault trap is often lack of stratum deposition or the stratum is degraded, and the stratum deposition thickness of the rising tray cannot be accurately obtained, so the fault growth index method and the fault fall method in the background technology are not suitable for analyzing the activity of the fault at the boundary of the fault trap and the structure of the trap.
Aiming at the defects of the existing fault activity and basin structure judging method for the boundary of the fractured-vuggy basin, the embodiment of the invention provides a method for transversely comparing the stratum burial depths of different parts of the fractured-vuggy basin to solve the problem that the stratum deposition thickness of a rising disc cannot be accurately obtained.
The strong movement of the boundary fault and the control of the sedimentary process of the fault basin bring great difference to the thickness of the stratum on the depression groove and the slope, so that the activity of the boundary fault can be accurately analyzed through the difference of the buried depths of the stratum on the depression groove and the slope, and the acquisition of the thickness of the stratum sediment of the rising plate of the boundary fault is avoided. Specifically, since the hollow area is adjacent to the boundary fault and the sloped area is far away from the boundary fault, the hollow area and the sloped area of the fractured basin are determined according to the position of the fracture basin boundary fault. Illustratively, a seismic section interpretation map of the fault trap basin is obtained, the position of a boundary fault can be accurately obtained on the section map, and a target position is determined in a depression groove area and a slope area according to the position of the boundary fault so as to transversely compare the stratum burial depths of the two target positions.
And step 302, determining the buried depth of each stratum interface in the hollow groove area and the slope area.
Since the crater and sloped regions are also formed by continuous deposition, the buried depth of each layer of the formation interface in the crater and sloped regions, respectively, is determined. For example, two vertical virtual wells are respectively arranged in a hollow area adjacent to a boundary fault and a slope area far away from the boundary fault in the seismic section interpretation chart, and the buried depth value of each stratum interface drilled in each stratum is read, namely the depth value from each stratum interface in the hollow area and the slope area to the horizontal plane is respectively obtained.
And step 303, determining the activity of the fault of the boundary of the fault-trap basin according to the buried depth difference of each stratum interface in the hollow groove area and the slope area.
The layer is quickly thinned from the front edge of the boundary fault to the slope region and is shown as a wedge-shaped filling pattern, and the stage can be called a collapse period; when the activity of the boundary fault is weakened, the thickness of the stratum is slowly reduced from the boundary fault to a slope area, and the stage is called a breakfastfirst transition period and can also be called a breakfasttransition-I period; when the boundary fault stops moving, the stratum shows plate-shaped deposition and the thickness is basically consistent, and the stage can be called a breaked second transition period and can also be called a breaked transition-II period; the terminal evolution stage of the fractured basin usually shows a thermal sedimentation effect, the deposition center is far away from the boundary fault, the thickness of the stratum is slowly increased from the boundary fault to the middle part of the basin, and the stage is called a stubborn stage.
Therefore, different deposition periods, namely evolution periods, can be determined from the thickness change according to the difference of stratum movement under different activities, and the activity of the fault trap basin boundary can be determined according to the judgment of the deposition periods. Illustratively, on the basis of the above example, the burial depth values of the respective stratum interfaces in the vertical virtual wells of the hollow zone and the sloped zone are obtained, and the burial depth difference intents of the respective stratum interfaces are determined, for example, the ordinate of the burial depth difference intents is the respective stratum interfaces, and the abscissa is the burial depth difference value of the hollow zone burial depth and the sloped zone burial depth of each stratum interface. Determining a change rule of the buried depth difference of the stratum interfaces from the schematic diagram, further determining the deposition period of each stratum interface in the fault basin according to the change rule, and determining the activity of the fault at the boundary of the fault basin according to the deposition period.
According to the embodiment of the invention, the activity of the boundary fault of the fault trap is accurately judged by analyzing the difference of the stratum buried depth of each part in the fault trap, so that the accuracy of judging the activity of the fault trap lacking stratum deposition or denuded stratum of a boundary fault rising disc is improved.
In one possible embodiment, determining the activity of the fault at the boundary of the fault basin based on the difference in the burial depths of the layer interfaces in the hollow zone and the sloped zone comprises:
determining the buried depth difference change range of each stratum interface in the depression groove area and the slope area;
determining the evolution period of each stratum interface according to the buried depth difference change amplitude of each stratum interface;
and determining the activity of the fault trap basin boundary according to the evolution period of each stratum interface.
Because different deposition periods can be determined from the thickness change according to the difference of stratum motions under different activities, the evolution period of each stratum interface can be determined according to the buried depth difference change amplitude of each stratum interface, and different evolution periods are generated when the fault trap basin is under different activities, so that the activity of the fault of the boundary of the fault trap basin can be determined according to the evolution period of each stratum interface. Illustratively, on the basis of the above example, the variation amplitude of the buried depth difference of each stratum interface can be clearly and accurately obtained from the buried depth difference intention of each stratum interface.
In a possible embodiment, determining the evolution period of each stratum interface according to the change amplitude of the buried depth difference of each stratum interface includes:
if the difference of the buried depths of the first target stratum interface in the hollow groove area and the slope area is a kink threshold value, determining that the first target stratum interface is in a kink period;
if the difference of the buried depths of the second target stratum interfaces in the hollow groove area and the slope area is a transition threshold value, determining that the second target stratum interface is in a fracture transition period;
if the difference of the buried depths of the third target stratum interfaces in the hollow groove area and the slope area is a fracture threshold value, determining that the third target stratum interface is in a fracture period;
wherein the stubborn threshold is smaller than the transition threshold, and the transition threshold is smaller than the trap-breaking threshold.
According to the general development rule of the extensional fissure depressed basin: fracture-fracture transition-fracture, so the distribution of stratum interfaces at the fracture period, the fracture transition period and the fracture period is from bottom to top. And setting different comparison thresholds according to the buried depth difference of the stratum interfaces in different evolution periods from the development change of the stratum in different evolution periods. Specifically, in the fault collapse period, the front edge of the boundary fault is quickly thinned towards the slope region; in the fracture transition period, the thickness of the stratum is slowly reduced from the boundary fault to the slope region and even stops moving; in the stuttering period, the deposition center is far away from the boundary fault, and the thickness of the stratum is slowly increased from the boundary fault to the middle of the basin.
Therefore, the comparison threshold values in different periods are set to be the minimum ones in the stubborn period, and the thickness of the stratum in the stubborn period is slowly increased from the boundary fault to the middle of the basin, namely the burial depth of the depression area adjacent to the boundary fault is smaller than the burial depth of the slope area far away from the boundary fault, namely the burial depth difference is smaller than zero (the burial depth difference is the difference between the burial depth of the depression area at each layer interface and the burial depth of the slope area), so that the stubborn threshold value is smaller than zero. Because the front edge of the boundary fault is quickly thinned towards the slope area in the fault-trap period, the burial depth of the depression area adjacent to the boundary fault is far greater than that of the slope area far away from the boundary fault, and the fault-trap threshold corresponding to the fault-trap period is the largest. Because the thickness of the stratum is slowly reduced from the boundary fault to the slope region or even stops moving in the fracture transition period, the difference of the buried depths between the strata in the depression groove region and the slope region is not large or even has no difference in the period, and the transition threshold value corresponding to the fracture transition period is a value larger than zero and smaller than the fracture threshold value.
Specifically, the stuttering threshold, the transition threshold and the breaking threshold may be set to be an interval, and are not limited to a specific value. And because the specific evolutions of different fault-trap basins are different, although the buried depth difference change amplitudes of the stratum interfaces at different evolution periods are similar, the specific threshold values are set differently, so that after the buried depth difference intention is determined, the threshold values can be set according to the specific change condition of the buried depth difference in the graph and in combination with the change rule, the specific setting can be determined according to experience, and the specific setting value of the threshold values is not limited.
Illustratively, on the basis of the above example, after the burial depth difference intentions of the stratum interfaces are determined, the stratum corresponding to the burial depth difference smaller than zero is determined as the stubborn period, the stratum corresponding to the burial depth difference equal to or close to zero is determined as the stubborn transition period, and the stratum corresponding to the stubborn transition period and having the burial depth difference suddenly increased downwards is determined as the stubborn period. The specific threshold value can therefore be determined from the point at which the difference in burial depths mutates.
In one possible embodiment, the breakfasted transition period comprises a breakfasted first transition period and a breakfasted second transition period; the transition threshold comprises a first transition threshold and a second transition threshold; wherein the second transition threshold is zero, and the first transition threshold is a non-zero value which is greater than the notch threshold and less than the notch threshold;
correspondingly, if the difference in the burial depths of the second target formation interface in the hollow groove area and the slope area is a transition threshold, determining that the second target formation interface is in the fracture transition period, including:
if the buried depth difference of a first transition target stratum interface in a second target stratum interface is a first transition threshold, determining that the first transition target stratum interface is in a fracture first transition period;
and if the buried depth difference of a second transition target stratum interface in the second target stratum interface is a second transition threshold, determining that the second transition target stratum interface is in a fracture second transition period.
In the embodiment of the invention, the setback transition period is divided into a setback first transition period and a setback second transition period, and the setback first transition period is before the setback second transition period, so that the stratum corresponding to the setback first transition period is positioned below the stratum corresponding to the setback second transition period.
Because the activity of the boundary fault is weakened in the first break-kink transition period, the thickness of the stratum is slowly reduced from the boundary fault to the slope region but is not stopped, and the boundary fault stops moving in the second break-kink transition period, so that the stratum is represented as plate-shaped deposition and has basically consistent thickness. Therefore, the buried depth of the stratum interface of the hollow groove area and the slope area is the same during the fracture second transition period, and the buried depth difference is zero and does not change; and in the fracture second transition period, the difference between the buried depths of the stratum interfaces of the hollow groove area and the slope area is not large, the buried depth difference is slightly larger than zero, and the stratum thickness is slowly reduced, so that the change amplitude of the buried depth difference is small. Specifically, the first transition threshold is a non-zero value which is larger than the notch threshold and smaller than the notch threshold, and the second transition threshold is set to be zero or an interval close to zero. For example, after the second target formation interface corresponding to the transition threshold is determined, the formation interface at the upper end with the zero burial depth difference in the second target formation interface is determined to be in the breakup second transition period, and the formation interface at the lower end with the non-zero burial depth difference is determined to be in the breakup first transition period.
In one possible embodiment, determining the activity of the fault at the boundary of the fault basin based on the difference in the burial depths of the layer interfaces in the hollow zone and the sloped zone comprises:
determining a buried depth difference change curve according to the buried depth difference of each stratum interface in the depression groove area and the slope area; the abscissa in the buried depth difference change curve is the buried depth difference value of each stratum interface in the depression groove area and the slope area, and the ordinate is each stratum interface from top to bottom;
fitting a buried depth difference change curve into a buried depth difference section broken line;
determining the evolution period of each stratum interface associated with each section of broken line according to the slope change condition of each section of broken line in the buried depth difference segmented broken line;
and determining the activity of the fault trap basin boundary according to the evolution period of each stratum interface.
Because different deposition periods can be determined from the thickness change according to the difference of stratum motions under different activities, the evolution period of each stratum interface can be determined according to the slope change condition of each broken line in the buried depth difference segmented broken line of each stratum interface, and different evolution periods are generated when the fault trap basin is under different activities, so that the activity of the fault trap basin boundary can be determined according to the evolution period of each stratum interface.
For example, as shown in fig. 4, a schematic diagram of the piecewise polygonal line fitting results of the burial depth differences of the crater area and the ramp area is shown in the upper half of fig. 4, two vertical virtual wells are respectively arranged in the crater area W1 adjacent to the boundary fault and the ramp area W2 far away from the boundary fault in the seismic section interpretation diagram, the burial depth values of the interfaces 1 to 8 in each stratum interface are read, that is, the depth values of each of the interfaces 1 to 8 in the crater area and the ramp area from the horizontal plane are respectively obtained, and the piecewise polygonal line of the burial depth of each stratum interface in the lower half of fig. 4 is obtained by determining the burial depth difference according to the obtained depth values. Since only 8 stratum interfaces are used as an example in this example, when the number of stratum interfaces increases or a deviation occurs in the development of the stratum, the obtained buried depth difference change curve of each stratum interface may be caused. In order to facilitate the determination of the change rule of the curve, the curve is fitted to obtain a buried depth difference section broken line. And determining the evolution period of each stratum interface associated with each section of the broken line according to the change condition of the slope in the buried depth differential section broken line.
In a possible embodiment, determining the evolution period of each stratum interface associated with each section of the broken line according to the slope change condition of each section of the broken line in the buried depth difference segmented broken line includes:
determining each turning point in the buried depth difference section broken line according to the slope change condition of each section of broken line in the buried depth difference section broken line;
determining the slope change condition of the upper broken line and the lower broken line of each turning point;
if the slope change condition of the upper broken line and the lower broken line of the first target turning point is that the absolute value of the slope changes from the original value to the original value, the first target turning point is associated with a conversion interface of a kink period and a second break transition period;
if the slope change condition of the upper and lower broken lines of the second target turning point is that the absolute value of the slope changes from zero to zero, the second target turning point is associated with a switching interface of a broken second transition period and a broken first transition period;
and if the slope change condition of the upper and lower broken lines of the third target turning point is that the absolute value of the slope changes from large to small, the third target turning point is associated with a switching interface of the breaking first transition period and the breaking period.
According to the embodiment, in the fault collapse period, the front edge of the boundary fault is quickly thinned towards the slope region; in the fracture transition period, the thickness of the stratum is slowly reduced from the boundary fault to the slope region and even stops moving; in the stuttering period, the deposition center is far away from the boundary fault, and the thickness of the stratum is slowly increased from the boundary fault to the middle of the basin. Therefore, the slope change condition of each section of broken line in the burial depth difference subsection broken line according to the rule is as follows: the absolute value of the slope of the broken line in the collapse period is smaller, the absolute value of the slope of the broken line in the first transition period from the collapse period to the broken line is suddenly increased, then the broken line is parallel to the ordinate in the second transition period from the first transition period to the broken line, namely, the broken line has no slope, and finally the slope of the broken line is suddenly reduced in the collapse period.
Therefore, the broken line segments can be divided according to the broken line turning points corresponding to different evolution periods, and each broken line turning point corresponds to a conversion interface among the breaking period, the breaking first transition period, the breaking second transition period and the breaking period respectively. Specifically, as shown in fig. 4, when the absolute value of the slope of the upper and lower broken lines at which a turning point appears on the broken line changes from the presence to the absence, that is, the lower broken line is parallel to the ordinate, the upper broken line corresponds to the kink-breaking period, and the lower broken line corresponds to the kink-breaking second transition period (kink-breaking transition-ii period); when the absolute value of the slope of the upper broken line and the lower broken line of a turning point on the broken line is changed from zero, namely the upper broken line is parallel to the ordinate, the lower broken line is a broken first transition period (broken transition-I period); and when the absolute value of the slope of the upper broken line and the lower broken line at which a turning point appears on the broken line is suddenly reduced, namely the difference value between the absolute value of the slope of the lower broken line and the absolute value of the slope of the upper broken line is greater than a slope threshold value, determining that the lower broken line corresponds to the fault trap period. The setting of the slope threshold may be determined according to the distribution condition of the slope of the specific segmented broken line, and is an empirical value, and the specific value of the slope threshold is not limited in the embodiment of the present invention.
In one possible embodiment, the method further comprises:
determining the thickness of the residual stratum of the fractured basin;
determining the development degree and position of the sedimentary center according to the change condition of the thickness of the residual stratum;
determining the evolution period of the fault basin according to the development degree and the position of the sedimentation center;
the activity of the fault basin is determined according to the evolution period.
According to the embodiment, the activity of the fault-trap basin boundary is determined longitudinally through the stratum buried depth comparison of different positions where the hollow groove area and the slope area are located, but because the stratum buried depth comparison is only determined longitudinally from two small areas, the structure and the evolution process of the fault-trap basin are different from those of the fault-trap basin longitudinally on the plane, the residual stratum thickness is introduced, the identification marks of the structure types of the basins on the residual stratum thickness graph are clear, and the characteristic of large difference is used for determining the activity of the fault-trap basin on the plane, so that the structure of the fault-trap basin is determined.
The performances of different evolution periods on the thickness of the residual stratum of the fractured basin are different, and the specific performances are as follows: the depocenter develops remarkably, and the position of the depocenter is close to the boundary fault and shows a fault stage; the deposition center is relatively developed, the position of the deposition center is adjacent to the boundary fault, and the secondary fault in the pot controls local deposition and shows a fracture first transition period; the deposition thickness has no obvious difference, and the secondary fault in the pot controls local deposition and shows a fracture second transition period; the middle part of the basin develops a small-amplitude deposition center, and develops only a small amount of secondary faults for controlling local deposition, which is expressed as a stubborn period. Wherein the distance between the depocenter and the boundary fault in the breakup period is less than the distance between the depocenter and the boundary fault in the breakup first transition period.
Specifically, the thickness of each area on the plane is determined according to the residual stratum of the upper ground surface of the fracture basin, the evolution period is not determined, the evolution period is determined according to the development degree and the position of the deposition center in the graph based on the concrete performance, the activity of the fracture basin is determined according to the evolution period, and then the structure type of the fracture basin is determined.
The embodiment of the invention analyzes the activity of the fault basin from the horizontal direction, and determines the structure type of the fault basin by combining the result of analyzing the activity of the fault basin from the longitudinal direction in the embodiment, thereby improving the accuracy of determining the structure type of the fault basin and avoiding the influence of a local area in the longitudinal direction.
Fig. 5 shows an explanation of an actual seismic profile of a fracture basin, in which well 2 is located in the trough region of the fracture basin, well 1 is located in the slope region of the fracture basin, and T50, T60, T70, T73, T80, T83, and Tg represent different stratigraphic interfaces. As shown in fig. 6, which is a graph of the burial depth difference of each stratum interface of a fault at the boundary of a certain fault basin, the slope change condition or the change amplitude of the burial depth difference of each broken line in fig. 6 can be obtained as follows: the Tg-T83 interface deposition period is a breaking period, the T83-T80 interface deposition period is a breaking transition-I period, and the T80-T70 interface deposition period is a breaking transition-II period. As can be seen from this practical example, in the embodiment of the present invention, the activity of the boundary fault can be accurately determined by analyzing the buried depth of each stratum interface of the boundary fault.
Example two
Fig. 7 is a schematic structural diagram of an apparatus for determining activity of a fault basin according to a second embodiment of the present invention, which is applicable to a case of removing noise from triangular mesh data. As shown in fig. 7, the apparatus includes:
the region determining module 710 is used for determining a hollow area and a slope area of the fractured basin according to the position of the fault of the boundary of the fractured basin;
a formation burial depth determination module 720, configured to determine burial depths of each of the formation interfaces in the trough region and the sloped region;
and the activity determination module 730 is used for determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area.
According to the embodiment of the invention, a hollow groove area and a slope area of the fractured basin are determined according to the position of the fault of the boundary of the fractured basin; determining the buried depth of each stratum interface in the depression groove area and the slope area; and determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area. According to the embodiment of the invention, the activity of the boundary fault of the fault trap is accurately judged by analyzing the difference of the stratum buried depth of each part in the fault trap, so that the accuracy of judging the activity of the fault trap lacking stratum deposition or denuded stratum of a boundary fault rising disc is improved.
Optionally, the activity determining module includes:
a buried depth difference variation range determining unit, configured to determine buried depth difference variation ranges of each stratum interface in the hollow area and the slope area;
a first evolution period determining unit, configured to determine an evolution period of each stratum interface according to the buried depth difference variation amplitude of each stratum interface;
and the first activity determination unit is used for determining the activity of the fault trap basin boundary according to the evolution period of each stratum interface.
Optionally, the first evolution period determining unit includes:
the stuttering period determining subunit is used for determining that the first target stratum interface is in a stuttering period if the difference between the buried depths of the depression groove area and the first target stratum interface in the slope area is a stuttering threshold value;
the broken kink transition period determining subunit is used for determining that the second target stratum interface is in a broken kink transition period if the buried depth difference between the depression groove area and the second target stratum interface in the slope area is a transition threshold;
a collapse period determining subunit, configured to determine that a third target formation interface in the hollow zone and the slope zone is in a collapse period if a difference in buried depths of the third target formation interface is a collapse threshold;
wherein the stubborn threshold is smaller than the transition threshold, and the transition threshold is smaller than the trap-breaking threshold.
Optionally, the seta divericatus transition period comprises a seta divericatus first transition period and a seta divericatus second transition period; the transition threshold comprises a first transition threshold and a second transition threshold; wherein the second transition threshold is zero, and the first transition threshold is a non-zero value which is greater than the notch threshold and less than the notch threshold;
correspondingly, the disjunctor transition period determining subunit is specifically used for:
if the burial depth difference of a first transition target stratum interface in the second target stratum interface is a first transition threshold, determining that the first transition target stratum interface is in a fracture first transition period;
and if the burial depth difference of a second transition target stratum interface in the second target stratum interface is a second transition threshold, determining that the second transition target stratum interface is in a fracture second transition period.
Optionally, the activity determining module includes:
a buried depth difference change curve determining unit, configured to determine a buried depth difference change curve according to a buried depth difference of each stratum interface in the hollow area and the slope area; the abscissa in the buried depth difference change curve is a buried depth difference value of each stratum interface in the depressed groove area and the slope area, and the ordinate is each stratum interface from top to bottom;
the buried depth difference section broken line fitting unit is used for fitting the buried depth difference change curve into a buried depth difference section broken line;
a second evolution period determining unit, configured to determine, according to a slope change condition of each segment of the buried depth difference segmented folding line, an evolution period of each stratum interface associated with each segment of the folding line;
and the second activity determination unit is used for determining the activity of the fault trap basin boundary according to the evolution period of each stratum interface.
Optionally, the second evolution period determining unit is specifically configured to:
determining each turning point in the buried depth difference section broken line according to the slope change condition of each section of broken line in the buried depth difference section broken line;
determining the slope change condition of the upper broken line and the lower broken line of each turning point;
if the slope change condition of the upper broken line and the lower broken line of the first target turning point is that the absolute value of the slope changes from the original value to the original value, the first target turning point is associated with a conversion interface of a kink period and a second break transition period;
if the slope change condition of the upper and lower broken lines of the second target turning point is that the absolute value of the slope changes from zero to zero, the second target turning point is associated with a switching interface of a broken second transition period and a broken first transition period;
and if the slope change condition of the upper and lower broken lines of the third target turning point is that the absolute value of the slope changes from large to small, the third target turning point is associated with a switching interface of the breaking first transition period and the breaking period.
Optionally, the apparatus further includes a plane activity determination module, configured to:
determining a residual formation thickness of the fracture basin;
determining the development degree and position of a deposition center according to the change condition of the thickness of the residual stratum;
determining the evolution period of the fault basin according to the development degree and the position of the sedimentation center;
and determining the activity of the fault trap basin according to the evolution period.
The device for judging the activity of the fault basin, provided by the embodiment of the invention, can execute the method for judging the activity of the fault basin, provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method for judging the activity of the fault basin.
EXAMPLE III
Fig. 8 is a schematic structural diagram of an electronic device according to a third embodiment of the present invention. FIG. 8 illustrates a block diagram of an exemplary electronic device 12 suitable for use in implementing embodiments of the present invention. The electronic device 12 shown in fig. 8 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in FIG. 8, electronic device 12 is embodied in the form of a general purpose computing device. The components of electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory device 28, and a bus 18 that couples various system components including the system memory device 28 and the processing unit 16.
The system storage 28 may include computer system readable media in the form of volatile storage, such as Random Access Memory (RAM)30 and/or cache storage 32. The electronic device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 8, and commonly referred to as a "hard drive"). Although not shown in FIG. 8, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. Storage 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in storage 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.
The processing unit 16 executes various functional applications and data processing by running programs stored in the system storage device 28, for example, implementing the method for determining activity of a collapsed basin provided by the embodiment of the present invention, including:
determining a hollow groove area and a slope area of the fractured basin according to the position of the fault of the boundary of the fractured basin;
determining the buried depth of each stratum interface in the depression groove area and the slope area;
and determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area.
Example four
The fourth embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for determining activity of a collapsed basin, which includes:
determining a hollow groove area and a slope area of the fractured basin according to the position of the fault of the boundary of the fractured basin;
determining the buried depth of each stratum interface in the depression groove area and the slope area;
and determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, or the like, as well as conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method for judging activity of a collapsed basin is characterized by comprising the following steps:
determining a hollow groove area and a slope area of the fractured basin according to the position of the fault of the boundary of the fractured basin;
determining the buried depth of each stratum interface in the depression groove area and the slope area;
and determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area.
2. The method of claim 1, wherein determining activity of the fault at the fault basin boundary based on a difference in burial depths of respective horizon interfaces in the dimpled zone and the sloped zone comprises:
determining the buried depth difference variation range of each stratum interface in the depression groove area and the slope area;
determining the evolution period of each stratum interface according to the buried depth difference change amplitude of each stratum interface;
and determining the activity of the fault trap basin boundary according to the evolution period of each stratum interface.
3. The method according to claim 2, wherein determining the evolution period of each stratum interface according to the variation amplitude of the buried depth difference of each stratum interface comprises:
if the difference of the buried depths of the first target stratum interface in the hollow groove area and the slope area is a kink threshold value, determining that the first target stratum interface is in a kink period;
if the difference of the buried depths of the second target stratum interface in the hollow groove area and the slope area is a transition threshold value, determining that the second target stratum interface is in a fracture transition period;
if the difference of the buried depths of the third target stratum interfaces in the hollow groove area and the slope area is a collapse threshold value, determining that the third target stratum interface is in a collapse period;
wherein the stubborn threshold is smaller than the transition threshold, and the transition threshold is smaller than the trap-breaking threshold.
4. The method of claim 3, wherein the breakfastidious transition period comprises a breakfastidious first transition period and a breakfastidious second transition period; the transition threshold comprises a first transition threshold and a second transition threshold; wherein the second transition threshold is zero, and the first transition threshold is a non-zero value which is greater than the notch threshold and less than the notch threshold;
correspondingly, if the difference in the buried depths of the second target formation interface in the hollow zone and the slope zone is a transition threshold, determining that the second target formation interface is in a fracture transition period, including:
if the burial depth difference of a first transition target stratum interface in the second target stratum interface is a first transition threshold, determining that the first transition target stratum interface is in a fracture first transition period;
and if the burial depth difference of a second transition target stratum interface in the second target stratum interface is a second transition threshold, determining that the second transition target stratum interface is in a fracture second transition period.
5. The method of claim 1, wherein determining activity of the fault at the fault basin boundary based on a difference in burial depths of respective horizon interfaces in the dimpled zone and the sloped zone comprises:
determining a buried depth difference change curve according to the buried depth difference of each stratum interface in the depression groove area and the slope area; the abscissa in the buried depth difference change curve is a buried depth difference value of each stratum interface in the depressed groove area and the slope area, and the ordinate is each stratum interface from top to bottom;
fitting the buried depth difference change curve into a buried depth difference section broken line;
determining the evolution period of each stratum interface associated with each section of broken line according to the slope change condition of each section of broken line in the buried depth difference segmented broken line;
and determining the activity of the fault trap basin boundary according to the evolution period of each stratum interface.
6. The method according to claim 5, wherein determining the evolution period of each stratum interface associated with each segment of the burial depth difference segmented polyline according to the slope change condition of each segment of the polyline, comprises:
determining each turning point in the buried depth difference section broken line according to the slope change condition of each section of broken line in the buried depth difference section broken line;
determining the slope change condition of the upper broken line and the lower broken line of each turning point;
if the slope change condition of the upper broken line and the lower broken line of the first target turning point is that the absolute value of the slope changes from the original value to the original value, the first target turning point is associated with a conversion interface of a kink period and a second break transition period;
if the slope change condition of the upper and lower broken lines of the second target turning point is that the absolute value of the slope changes from zero to zero, the second target turning point is associated with a switching interface of a broken second transition period and a broken first transition period;
and if the slope change condition of the upper and lower broken lines of the third target turning point is that the absolute value of the slope changes from large to small, the third target turning point is associated with a switching interface of the breaking first transition period and the breaking period.
7. The method of claim 1, further comprising:
determining a residual formation thickness of the fracture basin;
determining the development degree and position of a deposition center according to the change condition of the thickness of the residual stratum;
determining the evolution period of the fault basin according to the development degree and the position of the sedimentation center;
and determining the activity of the fault trap basin according to the evolution period.
8. An activity judgment device for a collapsed basin, comprising:
the area determination module is used for determining a hollow groove area and a slope area of the fractured basin according to the position of the fault of the boundary of the fractured basin;
the stratum buried depth determining module is used for determining the buried depth of each stratum interface in the depression groove area and the slope area;
and the activity determination module is used for determining the activity of the fault-trap basin boundary according to the buried depth difference of each stratum interface in the hollow groove area and the slope area.
9. An electronic device, comprising:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a method for determining activity in a fractured basin as recited in any of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out a method for determining the activity of a fractured basin according to any one of claims 1 to 7.
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