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CN107870374B - A kind of strata denudation evolution recovery method - Google Patents

A kind of strata denudation evolution recovery method Download PDF

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Publication number
CN107870374B
CN107870374B CN201610851492.4A CN201610851492A CN107870374B CN 107870374 B CN107870374 B CN 107870374B CN 201610851492 A CN201610851492 A CN 201610851492A CN 107870374 B CN107870374 B CN 107870374B
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denudation
strata
stratum
plane
recovery method
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CN107870374A (en
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王保华
陆建林
方成名
左宗鑫
宋在超
李�浩
刘运黎
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China Petroleum and Chemical Corp
Sinopec Exploration and Production Research Institute
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China Petroleum and Chemical Corp
Sinopec Exploration and Production Research Institute
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    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract

The invention discloses a kind of strata denudation evolution recovery methods.This method is to restore a kind of method of processing for stratum uplift and erosion process in petroleum geology industry, time started, end time, each Eroded Thickness data and a small amount of erosional rate model are degraded including be easier to obtain in one phase denudation of application, realize the prediction to the accumulative denudation of any time in the period is degraded, and each stratum paleostructure that underlies at any crucial moment in the phase is degraded according to accumulative erosion restoration, so that the temporal-spatial evolution analysis for stratum during geological work provides relatively reliable foundation.It is more nearly geology reality by the research purpose layer paleostructure form that this method obtains, while this method can also be provided rapidly for individual well simulation and degrade allocation plan.

Description

A kind of strata denudation evolution recovery method
Technical field
The present invention relates to technical field of geological exploration, degrade more particularly, to stratum uplift during geological research dynamic State evolution recovery method.
Background technique
Sedimentary formation uplift and erosion is a kind of most common geological evolution, carries out sedimentary formation erosion restoration and stripping Process dynamics evolution research is lost, quickly, accurately restores in denudation, target zone paleostructure form is covered under any crucial moment, It is of great significance to the analysis of sedimentary basin oil gas Dynamic accumulation.Although forefathers have done a large amount of work for the recovery of denudation Make, also achieves achievement abundant, phenomenon is degraded to stratum uplift, preliminary discussion has also been made, but to denudation Dynamic Evolution restores research and not yet carries out.Developing at present for strata denudation, there are mainly two types of methods for processing: a kind of method Assuming that strata denudation rate is identical in denudation, i.e., the stratum of same thickness is peelled off in the identical time;Another method is false If arbitrarily being degraded stratum, degrade that beginning, end time are all the same, i.e., in multilayer formation denudation, superstratum is degraded Start lower layer's strata denudation after complete.In geological evolution, inside large range of sedimentary basin, it is related to multilayer formation and degrades When, each region erosional rate is influenced by uplift size and process, in the plane and degrade shown as in evolutionary process it is non-thread Property feature.Therefore, existing method is mainly insufficient are as follows: excessively idealizes, has in the recovery of multilayer formation denudation dynamic evolution Body shows as 1) assuming in denudation, strata denudation rate is identical, 2) assume it is any degraded stratum, degrade beginning, terminate Time is all the same.They with geology real process exist is not inconsistent, can not more it is careful it is accurate announcement degrade evolutionary process.
Summary of the invention
For the deficiency of the above-mentioned restoration methods of denudation in the prior art, the invention proposes a kind of new strata denudations Evolution recovery method, comprising the following steps:
S10 obtains each layer Eroded Thickness involved in this denudation, adds up to each layer Eroded Thickness, Obtain total denudation of this denudation;
S20, at the beginning of determining this denudation and the end time;
S30 obtains stratum any time denudation model according to stratum erosional rate model;
S40 carries out interpolation by the data to denudation models multiple in plane to obtain accumulative denudation body;
S50, at the beginning of determining each layer strata denudation according to accumulative denudation body and the end time;
S60 obtains the erosion stratum at the moment according to accumulative denudation body for any time in this denudation Overall thickness is subtracted the stratum of the erosion overall thickness at the moment using each layer stratigraphic structure buried depth before degrading, obtains underliing for the moment Each stratum paleostructure.
According to an embodiment of the invention, each layer stratum can be shelled using inverse distance weight in above-mentioned steps S10 Erosion amount is converted to unified grid data, then adds up, and obtains total denudation of this denudation.
According to an embodiment of the invention, the inverse distance weight assumes that n scatterplot in plane in above-mentioned steps S10 Data, each point attribute value are vi, carry out interpolation to these scatterplot data by following formula, obtain certain point attribute V in plane, wherein ri It is the point at a distance from i-th of scatterplot,
According to an embodiment of the invention, inverse distance weight can be used this denudation in above-mentioned steps S20 Starting and end time is converted to unified grid data.
According to an embodiment of the invention, the strata denudation Rate Models can be by measuring phosphorus in above-mentioned steps S30 Certain point strata denudation rate curve in the plane that lime stone fission track data determine.
According to an embodiment of the invention, the strata denudation Rate Models can be by uplift rate in above-mentioned steps S30 Certain point strata denudation rate curve in the plane that Curve transform obtains.
According to an embodiment of the invention, in above-mentioned steps S40, it can be by using inverse distance weight to multiple in plane The data of denudation model carry out interpolation to obtain accumulative denudation body.
According to an embodiment of the invention, the inverse distance weight is by following formula to n in plane in above-mentioned steps S40 A denudation model e1(t) ..., en(t) data carry out interpolation, obtain certain point in plane accumulative denudation body E (x, y, T), wherein ri is the point at a distance from i-th of scatterplot,
According to an embodiment of the invention, above-mentioned accumulative denudation body E (x, y, t) is the monotonically increasing function about the time, At the beginning of determining each layer strata denudation by linear search method and the end time.
According to an embodiment of the invention, above-mentioned strata denudation evolution recovery method, can with the following steps are included:
S70 exports each stratum paleotectonic map of any time in this denudation.
Compared with prior art, one or more embodiments of the invention can have following advantage:
Strata denudation evolution recovery method provided by the invention is that one kind can embody in strata denudation recovery evolutionary process, The uplift for being more nearly geology real process degrades method.Using this method, can accurately and efficiently restore in the phase of degrading Each stratum paleostructure that underlies at any crucial moment is during geological work, and the temporal-spatial evolution analysis on purpose stratum provides more Add reliable foundation.Specifically,
(1) present invention being capable of degrading beginning, the end time, respectively degraded strata denudation by one phase denudation of input Amount and part erosional rate model realize a phase multilayer differential denudation amount recovery process by numerical simulation;
(2) practical mistake of the phase multilayer differential denudation amount recovery process realized through the invention closer to Geological Evolution Journey solves the problems, such as that simulation is more reasonable;
(3) the accumulative body-measure data that degrades that the present invention obtains can provide multilayer denudation for any single-point burial history reconstruction Allocation plan can greatly improve individual well simulation precision.
(4) present invention may be equally applicable to the erosion restoration work that single layer degrades event.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings:
The flow chart of strata denudation evolution recovery method in Fig. 1 embodiment of the present invention;
Fig. 2 is the schematic diagram of strata denudation Rate Models in the embodiment of the present invention;
Fig. 3 is the stratum any time denudation obtained in the embodiment of the present invention according to the strata denudation Rate Models of Fig. 3 The schematic diagram of model;
Fig. 4 is to determine each layer strata denudation in multilayer differential denudation model according to accumulative denudation body in the embodiment of the present invention At the beginning of and the end time schematic diagram.
Specific embodiment
Spirit of the invention be degraded using a phase be easier in event obtain always degrade the time started, at the end of Between, each Eroded Thickness data and a small amount of erosional rate model, degrade dynamic evolution restoration methods using stratum uplift, It realizes the prediction for adding up denudation to any time in the phase of degrading, and denudation is added up according to this, restore to throw oneself on the ground under any time Layer paleostructure.
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and examples to the present invention It is described in further detail.
As shown in Figure 1, strata denudation evolution recovery method mainly comprises the steps that in embodiment
S10 obtains each layer Eroded Thickness involved in this denudation, adds up to each layer Eroded Thickness, Obtain total denudation of this denudation.
Wherein, input in a denudation involved each layer Eroded Thickness data, and preferably using instead away from Each layer is degraded into data conversion into uniform grid data from weighting method, then adds up to each layer denudation, is degraded with obtaining this Total denudation of event.
Specifically, inverse distance weight assumes that n scatterplot data in plane, and each point attribute value is vi, passes through following formula pair These scatterplot data carry out interpolation, obtain certain point attribute V in plane, and wherein ri is the point at a distance from i-th of scatterplot,
S20, at the beginning of determining this denudation and the end time.
Similarly, it preferably will be converted into uniting with the end time at the beginning of this denudation using inverse distance weight One grid data.
S30 obtains stratum any time denudation model according to stratum erosional rate model.
In the present embodiment, the erosional rate model is that certain point is degrading stage any time strata denudation speed in plane Rate curve (as shown in Figure 2).The related data of rate curve can be obtained by measurement Apatite fission track data, can also be with It is obtained by application uplift rate Curve transform.As shown in figure 3, can be by being integrated to stratum erosional rate curve, it will It is converted to any time Eroded Thickness model.Such as following formula:
S40 carries out interpolation by the data to denudation models multiple in plane to obtain accumulative denudation body.
Accumulative denudations multiple in plane are obtained into accumulative denudation body by inverse distance weight interpolation.
If n denudation model is e in plane1(t) ..., en(t), it is carried out by the data of these denudation models slotting It is accumulative denudation body Model E (x, y, t) to obtain certain point in plane for value.Likewise it is possible to be added using the anti-distance being shown below Power method carries out interpolation to the data of denudation models multiple in plane, obtains the accumulative denudation body Model of certain point in plane.
In formula, ri is that certain is put at a distance from i-th of scatterplot in plane.
S50, at the beginning of determining each layer strata denudation according to accumulative denudation body and the end time.
Fig. 4 is a multilayer differential denudation model in the embodiment of the present invention.Wherein L1, L2, L3, L4, L5 indicate stratal surface; H1, h2, h3, h4 respectively indicate L1-L2, L2-L3, L3-L4, L4-L5 formation thickness;E1, e2, e3, e4 indicate stratum primary It degrades in event 4 and degrades time point (or moment).For the principle that the present invention is further explained, can select without loss of generality Select any (x0, y0) point, it is assumed that once degrading event start time is e4, end time e1, the e3 moment degrade just to L3 level (stratum L3-L4, L4-L5 of face covering has been degraded, and the stratum L2-L3 not yet starts to degrade), it is lucky at the e2 moment It degrades to L2 level.In actual operation the known primary event of degrading start, the end time, i.e., known e4, e1, it is known that degraded Each formation thickness that event influences, i.e. L1-L2, L2-L3, L3-L4, L4-L5 formation thickness is respectively h1, h2, h3, h4, then needs It seeks being degraded degrading beginning and end time for each stratum of event influence, that such as seeks the stratum L2-L3 degrades beginning, knot Beam time e3 and e2.And the two material times seek passing through respectively equation E (x0, y0, t)=h4+h3 and E (x0, y0, T)=h4+h3+h2 is solved.In the present embodiment, from the figure 3, it may be seen that E (x, y, t) is the monotonic increasing function about the time, therefore can To degrade starting and end time (as shown in Figure 4) using linear search method acquisition L2-L3 level.
S60 obtains the erosion stratum at the moment according to accumulative denudation body for any time in this denudation Overall thickness is subtracted the stratum of the erosion overall thickness at the moment using each layer stratigraphic structure buried depth before degrading, obtains underliing for the moment Each stratum paleostructure.
S70 exports any time underlying strata paleotectonic map in this denudation.
The above, specific implementation case only of the invention, scope of protection of the present invention is not limited thereto, any ripe Those skilled in the art are known in technical specification of the present invention, modifications of the present invention or replacement all should be in the present invention Protection scope within.For example, inverse distance-weighting described in the present invention is a kind of method of mathematical interpolation, not uniquely, Plane and body interpolation algorithm can also be using interpolation algorithms such as Ke Lijin, sequence Gauss.

Claims (10)

1. a kind of strata denudation evolution recovery method, comprising the following steps:
S10 obtains each layer Eroded Thickness involved in this denudation, adds up to each layer Eroded Thickness, obtains Total denudation of this denudation;
S20, at the beginning of determining this denudation and the end time;
S30 obtains stratum any time denudation model according to stratum erosional rate model;
S40 carries out interpolation by the data to denudation models multiple in plane to obtain accumulative denudation body;
S50, at the beginning of determining each layer strata denudation according to accumulative denudation body and the end time;
S60 obtains the stratum of the erosion total thickness at the moment according to accumulative denudation body for any time in this denudation Degree is subtracted the stratum of the erosion overall thickness at the moment using each layer stratigraphic structure buried depth before degrading, obtains the various regions of underliing at the moment Layer paleostructure.
2. strata denudation evolution recovery method according to claim 1, it is characterised in that:
In step S10, each layer Eroded Thickness is converted to by unified grid data using inverse distance weight, then into Row is cumulative, obtains total denudation of this denudation.
3. strata denudation evolution recovery method according to claim 2, it is characterised in that:
In step S10, the inverse distance weight assumes that n scatterplot data in plane, and each point attribute value is vi, passes through following formula Interpolation is carried out to these scatterplot data, obtains certain point attribute V in plane, wherein ri is the point at a distance from i-th of scatterplot,
4. strata denudation evolution recovery method according to claim 1, it is characterised in that:
In step S20, unification will be converted to the end time using inverse distance weight at the beginning of this denudation Grid data.
5. strata denudation evolution recovery method according to claim 1, it is characterised in that:
In step S30, the strata denudation Rate Models are certain in the plane determined by measurement Apatite fission track data Point strata denudation rate curve.
6. strata denudation evolution recovery method according to claim 1, it is characterised in that:
In step S30, the strata denudation Rate Models are certain point stratum strippings in the plane obtained by uplift rate Curve transform Lose rate curve.
7. strata denudation evolution recovery method according to claim 1, it is characterised in that:
In step S40, interpolation is carried out by using data of the inverse distance weight to denudation models multiple in plane to obtain Accumulative denudation body.
8. strata denudation evolution recovery method according to claim 7, it is characterised in that:
In step S40, the inverse distance weight is by following formula to n denudation model e in plane1(t) ..., en(t) Data carry out interpolation, obtain the accumulative denudation body E (x, y, t) of certain point in plane, wherein ri be the point and i-th scatterplot away from From,
Wherein eiIt (t) is i-th of denudation model in 1 to n denudation model in plane.
9. strata denudation evolution recovery method according to claim 8, it is characterised in that:
The accumulative denudation body E (x, y, t) is the monotonically increasing function about the time, with determining each layer by linear search method Layer degrade at the beginning of and the end time.
10. strata denudation evolution recovery method according to claim 8, which is characterized in that further comprising the steps of:
S70 exports each stratum paleotectonic map that underlies of any time in this denudation.
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CN108828685B (en) * 2018-04-24 2019-05-10 北京师范大学 A kind of determination method of formation erosion thickness
CN111624674A (en) * 2020-06-09 2020-09-04 中国地质大学(北京) Simulation system for evolution of deposition sequence formation
CN119045051B (en) * 2023-05-29 2025-09-12 中国石油天然气股份有限公司 A method for correcting stratum erosion using two-dimensional simulation

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