CN107462938A - Thrust belts structural physical simulation method - Google Patents
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- CN107462938A CN107462938A CN201710602401.8A CN201710602401A CN107462938A CN 107462938 A CN107462938 A CN 107462938A CN 201710602401 A CN201710602401 A CN 201710602401A CN 107462938 A CN107462938 A CN 107462938A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004088 simulation Methods 0.000 title claims abstract description 14
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Abstract
The present invention relates to a kind of thrust belts structural physical simulation method.Comprise the following steps：（1）First, deformation analysis：The tectonic setting deformed in land is based oneself upon, analyzes thrust belts deep deformation feature, establishes the geological model of deformation field and subsection deformation；（2）Then, Experimental modeling：Kinetic model：Preset sand body one forms 70 ° of angular contacts with sand body two, simulates orogenic belt and basin, and oblique pressure torsion process respectively；The inside of sand body two sets layer of silica gel, to simulate influence of the ductile bed to structural deformation；Active force mode uses one-sided compression pattern, you can realizes the underriding of a pair of sand bodies of sand body two；（Three）Afterwards, simulated experiment：（Four）Finally, loop optimization：The present invention is devised with horizontal two blocks of theological differences, thrust belts border deformation problem can be handled, underriding of the orogenic belt to basin is realized and its turns back, embody and thrust in the spliced land of heterogeneity ancient plate, meet evolution and the Geotectonic Setting of the unique regeneration foreland of thrust belts.
Description
Technical field
The present invention relates to a kind of oil-gas field geology to explore analogue technique, more particularly to a kind of thrust belts structural physical simulation side
Method.
Background technology
Simulation experiment of tectonics physics can intuitively, effectively reproduce thrust belts deformation process, and then feed back geophysics money
The explanation of material, reduce the risk of oil-gas exploration.
Thrust belts refer to the zone of transition between orogenic belt and basin, push away and cover against punching on a large scale from orogenic belt to basin-wards
The thrust system formed.Since 98 years find the large oil and gas fields such as Kela 2 Gas Field, Qing Xi oil fields, thrust belts turn into oil gas
One of four big fields of exploration, and in succession in storehouse car, southwest Tarim, quasi- west, tell and breathe out the northern fringe, Chai Xi, Sichuan Basin periphery etc. in front of the mountains
Thrust belts make important progress, and predict 78.68 hundred million tons of petroleum resource cities, the side of natural gas 33.4 trillion, show that its Exploration Potential is huge
Greatly.Longmenshan thrust belts find hundred billion grades of natural gas pools in succession in deep 1 well of duck, deep 1 well of sheep, the well of Pengzhou 1 etc. at present, and plan to bore
Double days 1 well, the well of white deer 1 etc. are visited, is that long-term the important of oil gas increasing the storage takes over field in Sinopec.But thrust belts are by more phases
Orogenic movement is transformed, and structural deformation is sufficiently complex；Meanwhile seismic data quality is poor, structure interpretation and geological model have more solutions
Property, cause exploration risk to increase.The key for solving the problems, such as above-mentioned production is Geologic modeling, and simulation experiment of tectonics physics is checking
A kind of important means of geological model and nature structural deformation.However, scholar is to existing geological model middle ancient times landmass border
Position, the high angle thrust origin cause of formation, tomography disputed on from foreland to the problems such as mechanism of backland gradual change law it is a lot of, and then establish
A variety of geological models and experimental model.
In terms of simulation experiment of tectonics physics, domestic scholars are to areas such as Longmenshan, Daba Mountain, Kusilafu-Talong Lead-zinc belt, southern tianshans
Thrust belts carried out physical analogy, the governing factor being related to include slip band depth, occurrence, number, first deposit construction influence, squeeze
Press speed size, synsedimentary and its speed etc..Foreign scholar includes slipping for the single factor test control experiment that different regions are carried out
Layer property, distance are dived and the distance of collision belt, underriding collision mode, terrestrial erosion effect, deep intrusion, Fluid pressure
Deng.For experimental observation technical elements in addition to DV photographies and high-definition camera, means more now include Particle Image Velocity
（PIV）, laser scanning, CT scan etc..In terms of experiment material, experiment generally use dries loose pure quartz sand to simulate Shangdi
Shell brittle formation, the detachment layers of tool Newtonian fluid feature are simulated with transparent polymerising silicone resin or small quartz ball.
Experimental model design aspect, kinetic model have three kinds：Diving model, compact model, collision model.Diving model
Whole model deformation is driven by bottom load transfer device, compact model makes model deform successively forward by extruding one end, collides
Model by promote two not in contact with sand body collision realize deformation.The former is applied to the continental margin deformation that A types dive, and both are suitable afterwards
Deformed in the land dived for Type B, and three does not all design horizontal theological differences, is not suitable for China's foreland basins thrust belts
Dynamical system background.
In terms of the high angle thrust origin cause of formation, in thrust belts reversed fault tilt profiles in double-peak type-low value peak be 30 ±
5 °, high level peak is 50 ± 5 °.However, the latter can not use mole-coulomb criterion to explain, the imperial day developed such as Longmenshan thrust belts
Dam fracture, Minjiang Fault, reflect show-Beichuan fracture and Guanxian county-river oil fracture etc..Some scholars think that high angle reversed fault is just
Tomography reversion forms, and its deformation process follows " uncoordinated criterion "；Also scholar thinks, such fault development is in DUCTILE SHEAR mistake
Plasticity in journey is flattened, and its deformation process follows " porous compacting criterion ".Afterwards, scholar points out the deficiency of both viewpoints, and
Iing is proposed such tomography is caused by DUCTILE SHEAR, and angle is 55 ° during initial rupture, and deformation follows Maximum effective moment.
But the origin mechanism is still without two phenomenons of method interpretation：（1）Co-hade gradually becomes from orogenic belt to foreland direction in intermediate zone
It is small；（2）The reversed fault that a large amount of inclination angles are more than or less than initial rupture angle is still suffered from thrust belts；Moreover, the theory does not obtain yet
To experimental verification.
Orogenic belt and rheology characteristic of the lithosphere on transverse direction, longitudinal direction according to previous studies, thrusting decoupling deformation in land should
Two kinds of sand bodies are designed in the horizontal, and detachment layers are designed on longitudinal direction；High angle thrust experience fragility, tough-fragility, toughness three
Deformation stage, " Maximum effective moment " are probably the limiting condition of " porous compacting criterion ", that is, second stage sand in testing
Body deformation follows " porous compacting criterion ", and the deformation of phase III sand body follows " Maximum effective moment ".
The content of the invention
The purpose of the present invention is aiming at drawbacks described above existing for prior art, there is provided a kind of thrust belts structural physical simulation
Method, the modelling have horizontal two blocks of theological differences, can handle thrust belts border deformation problem, realize orogenetic
Underriding of the band to basin and its turn back, embody and thrust in the spliced land of heterogeneity ancient plate, it is unique to meet thrust belts
Regenerate evolution and the Geotectonic Setting of foreland；In terms of research meanses, after section two dimensional is obtained, propose with time-lapse photography side
Method handles model picture, and overall process is tested with fast quick-recovery, and the deformation process that naked eyes can not be discovered is presented, effectively follows the trail of each structure
Make the differentiation of phenomenon.
A kind of thrust belts structural physical simulation method that the present invention mentions, comprises the following steps：
（1）First, deformation analysis：
The tectonic setting deformed in land is based oneself upon, thrust belts deep is analyzed using data, broad-band teleseismic, lithosphere rheology profile
Deformation behaviour, establish the geological model of deformation field and subsection deformation；
（2）Then, Experimental modeling：
Kinetic model：Preset sand body one forms 70 ° of angular contacts with sand body two, simulates orogenic belt and basin respectively, and oblique
Press torsion process；The inside of sand body two sets layer of silica gel, to simulate influence of the ductile bed to structural deformation；Active force mode is using unilateral
Squeeze mode, you can realize the underriding of a pair of sand bodies of sand body two；
Geological model：In transverse direction, a variety of splitting schemes are had according to deformation behaviour, are all in all divided into rear mountain belts, foothill Belt, mountain
Preceding three sections of band, on longitudinal direction, thrust belts are from ancient times now, from deep and shallow in terms of Basin Prototype, depositional sequence, the more attributes of structural deformation
With overlapping feature, evolutionary period is respectively Eopaleozoic, late Paleozoic, Middle Cenozoic, depositional sequence include Marine Lower Assemblage,
Combination and three sequences of terrestrial facies on marine facies；
（Three）Afterwards, simulated experiment：
Experiment flow：Preparatory stage, on experiment porch lay experimental model needed for material, and surface stamp should be rounded or
Square；In operation, sand body section deformation process is recorded using DV video cameras, is scanned using high resolution camera, dimensional topography
Instrument, infrared track scanner record sand body plane deformation process；After end, sprinkled water using watering can to sand body to drenching, use knife
Tool is cut into slices to sand body spacing, and shoots sand body internal modification feature with camera；
（Four）Finally, loop optimization：
After experiment terminates each time, experience, deficiency in experimental implementation are summarized immediately, to improve next experiment；Then, to clapping
The video data and the data volume data of scanning taken the photograph are modeled to be handled with time-lapse photography, and carries out quantitative analysis；Finally, in time
Analysis experimental result simultaneously compares, regulation experiment model with deformation field, geological model, to complete geological model-experimental model-reality
The loop optimization of result is tested, realizes roll experiment.
Above-mentioned sand body two uses colourless or with color dry sand.
Above-mentioned sand body one uses aqueous 5% sand body.
In above-mentioned step three, laying the detailed process of experimental model is：
According to similarity principle, the thickness data for testing the speed run, time and model formation, Gu Bei can be calculated
Section-first paver sand 1.0,0.5,0.5,0.5cm from bottom to top, O-Z, S-P2, P3-T1, T2-3, setting operation are represented respectively
Speed 0.041mm/s, time 42.6min；Then, 0.5cm silica gel and 2cm quartz sands are repaved, representing respectively must the slippage of Mi He groups
Layer and sieve dwarf-Cretaceous System, speed 0.006mm/s, run 113min；Stage casing-first paving 0.5,0.5,0.5,0.5,2.2cm respectively
Sand, silica gel, sand, silica gel, sand, represent substrate, substrate detachment layers, P-T1, thunderbolt ways detachment layers, T3, speed respectively
0.002mm/s, time 43min；4cm sand is repaved, represents J-K, speed 0.115mm/s, time 113min；0.5 sand is repaved, is represented
Cz, speed 0.152mm/s, time 55min；The paving of southern section-first 0.5,0.5,0.5,0.5,1.6cm sand, silica gel, sand, silica gel,
Sand, substrate, substrate detachment layers, P-T1, thunderbolt ways detachment layers, T3, speed 0.005mm/s, time 84min are represented respectively；Again
1.8cm sand is spread, represents J-Q, speed 0.019mm/s, time 84min.
The beneficial effects of the invention are as follows：Existing dynamic experiment model, which can not embody, thrusts background in land, Yi Jizao
Inserted splicing between mountain belts and basin.This project is intended by setting two kinds of sand bodies, detachment layers etc., and foundation has vertical, horizontal
Extruding-collision model of theological differences；According to principle of similarity, experiment with computing operational factor；Remembered using technologies such as sequence photographies
Experimentation is recorded, recovers section two dimensional deformation process, and quantitative analysis foregoing problems using time-lapse photography method.Experimental result table
It is bright, three high angle thrust experience fragility, tough-fragility, toughness deformation stages, and it is disconnected in tough-brittle deformation stage
What layer was advantageous to oil gas dredges He Chengzang；Positive flower structure is to squeeze the origin cause of formation in thrust belts, and tomography terminates at detachment layers in shell.
Brief description of the drawings
Accompanying drawing 1 is extruding-collision of the present invention " experimental model schematic diagram；
Accompanying drawing 2 is the operational flowchart of the step four of the present invention.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein preferred real
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
A kind of embodiment 1, thrust belts structural physical simulation method that the present invention mentions, comprises the following steps：
（1）First, deformation analysis：
The tectonic setting deformed in land is based oneself upon, is analyzed using Sinoprobe data, broad-band teleseismic, lithosphere rheology profile
Thrust belts deep deformation feature, establish the geological model of deformation field and subsection deformation；
（2）Then, Experimental modeling：
Kinetic model：Preset sand body one forms 70 ° of angular contacts with sand body two, simulates orogenic belt and basin respectively, and oblique
Press torsion process；The inside of sand body two sets layer of silica gel, to simulate influence of the ductile bed to structural deformation；Active force mode is using unilateral
Squeeze mode, you can realize the underriding of a pair of sand bodies of sand body two；
Geological model：In transverse direction, a variety of splitting schemes are had according to deformation behaviour, are all in all divided into rear mountain belts, foothill Belt, mountain
Preceding three sections of band, on longitudinal direction, thrust belts are from ancient times now, from deep and shallow in terms of Basin Prototype, depositional sequence, the more attributes of structural deformation
With overlapping feature, evolutionary period is respectively Eopaleozoic, late Paleozoic, Middle Cenozoic, depositional sequence include Marine Lower Assemblage,
Combination and three sequences of terrestrial facies on marine facies；
（Three）Afterwards, simulated experiment：
Experiment flow：Preparatory stage, on experiment porch lay experimental model needed for material, and surface stamp should be rounded or
Square；In operation, sand body section deformation process is recorded using DV video cameras, is scanned using high resolution camera, dimensional topography
Instrument, infrared track scanner record sand body plane deformation process；After end, sprinkled water using watering can to sand body to drenching, use knife
Tool is cut into slices to sand body spacing, and shoots sand body internal modification feature with camera；
（Four）Finally, loop optimization：
After experiment terminates each time, experience, deficiency in experimental implementation are summarized immediately, to improve next experiment；Then, to clapping
The video data and the data volume data of scanning taken the photograph are modeled to be handled with time-lapse photography, and carries out quantitative analysis；Finally, in time
Analysis experimental result simultaneously compares, regulation experiment model with deformation field, geological model, to complete geological model-experimental model-reality
The loop optimization of result is tested, realizes roll experiment.
Above-mentioned sand body two uses colourless or with color dry sand.
Above-mentioned sand body one uses aqueous 5% sand body.
In above-mentioned step three, laying the detailed process of experimental model is：
According to similarity principle, the thickness data for testing the speed run, time and model formation, Gu Bei can be calculated
Section-first paver sand 1.0,0.5,0.5,0.5cm from bottom to top, O-Z, S-P2, P3-T1, T2-3, setting operation are represented respectively
Speed 0.041mm/s, time 42.6min；Then, 0.5cm silica gel and 2cm quartz sands are repaved, representing respectively must the slippage of Mi He groups
Layer and sieve dwarf-Cretaceous System, speed 0.006mm/s, run 113min；Stage casing-first paving 0.5,0.5,0.5,0.5,2.2cm respectively
Sand, silica gel, sand, silica gel, sand, represent substrate, substrate detachment layers, P-T1, thunderbolt ways detachment layers, T3, speed respectively
0.002mm/s, time 43min；4cm sand is repaved, represents J-K, speed 0.115mm/s, time 113min；0.5 sand is repaved, is represented
Cz, speed 0.152mm/s, time 55min；The paving of southern section-first 0.5,0.5,0.5,0.5,1.6cm sand, silica gel, sand, silica gel,
Sand, substrate, substrate detachment layers, P-T1, thunderbolt ways detachment layers, T3, speed 0.005mm/s, time 84min are represented respectively；Again
1.8cm sand is spread, represents J-Q, speed 0.019mm/s, time 84min.
Embodiment 2,
It is described above, only it is the part preferred embodiment of the present invention, any those skilled in the art are possibly also with upper
Equivalent technical scheme is changed or be revised as to the technical scheme for stating elaboration.Therefore, according to technical scheme
Any simple modification carried out or substitute equivalents, belong to the greatest extent the scope of protection of present invention.
Claims (4)
- A kind of 1. thrust belts structural physical simulation method, it is characterized in that comprising the following steps：（1）First, deformation analysis：The tectonic setting deformed in land is based oneself upon, thrust belts deep is analyzed using data, broad-band teleseismic, lithosphere rheology profile Deformation behaviour, establish the geological model of deformation field and subsection deformation；（2）Then, Experimental modeling：Kinetic model：Preset sand body one forms 70 ° of angular contacts with sand body two, simulates orogenic belt and basin respectively, and oblique Press torsion process；The inside of sand body two sets layer of silica gel, to simulate influence of the ductile bed to structural deformation；Active force mode is using unilateral Squeeze mode, you can realize the underriding of a pair of sand bodies of sand body two；Geological model：In transverse direction, a variety of splitting schemes are had according to deformation behaviour, are all in all divided into rear mountain belts, foothill Belt, mountain Preceding three sections of band, on longitudinal direction, thrust belts are from ancient times now, from deep and shallow in terms of Basin Prototype, depositional sequence, the more attributes of structural deformation With overlapping feature, evolutionary period is respectively Eopaleozoic, late Paleozoic, Middle Cenozoic, depositional sequence include Marine Lower Assemblage, Combination and three sequences of terrestrial facies on marine facies；（Three）Afterwards, simulated experiment：Experiment flow：Preparatory stage, on experiment porch lay experimental model needed for material, and surface stamp should be rounded or Square；In operation, sand body section deformation process is recorded using DV video cameras, is scanned using high resolution camera, dimensional topography Instrument, infrared track scanner record sand body plane deformation process；After end, sprinkled water using watering can to sand body to drenching, use knife Tool is cut into slices to sand body spacing, and shoots sand body internal modification feature with camera；（Four）Finally, loop optimization：After experiment terminates each time, experience, deficiency in experimental implementation are summarized immediately, to improve next experiment；Then, to clapping The video data and the data volume data of scanning taken the photograph are modeled to be handled with time-lapse photography, and carries out quantitative analysis；Finally, in time Analysis experimental result simultaneously compares, regulation experiment model with deformation field, geological model, to complete geological model-experimental model-reality The loop optimization of result is tested, realizes roll experiment.
- 2. thrust belts structural physical simulation method according to claim 1, it is characterized in that：Described sand body two is using colourless Or the dry sand with color.
- 3. thrust belts structural physical simulation method according to claim 1, it is characterized in that：Described sand body one is using aqueous 5% sand body.
- 4. thrust belts structural physical simulation method according to claim 1, it is characterized in that：In described step three, laying The detailed process of experimental model is：According to similarity principle, the thickness data for testing the speed run, time and model formation, Gu Bei can be calculated Section-first paver sand 1.0,0.5,0.5,0.5cm from bottom to top, O-Z, S-P2, P3-T1, T2-3, setting operation are represented respectively Speed 0.041mm/s, time 42.6min；Then, 0.5cm silica gel and 2cm quartz sands are repaved, representing respectively must the slippage of Mi He groups Layer and sieve dwarf-Cretaceous System, speed 0.006mm/s, run 113min；Stage casing-first paving 0.5,0.5,0.5,0.5,2.2cm respectively Sand, silica gel, sand, silica gel, sand, represent substrate, substrate detachment layers, P-T1, thunderbolt ways detachment layers, T3, speed respectively 0.002mm/s, time 43min；4cm sand is repaved, represents J-K, speed 0.115mm/s, time 113min；0.5 sand is repaved, is represented Cz, speed 0.152mm/s, time 55min；The paving of southern section-first 0.5,0.5,0.5,0.5,1.6cm sand, silica gel, sand, silica gel, Sand, substrate, substrate detachment layers, P-T1, thunderbolt ways detachment layers, T3, speed 0.005mm/s, time 84min are represented respectively；Again 1.8cm sand is spread, represents J-Q, speed 0.019mm/s, time 84min.
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| CN115294848A (en) * | 2022-06-27 | 2022-11-04 | 中国石油大学(北京) | Physical simulation device and simulation analysis method for influence factors of plate diving deformation |
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