CN104977613A - Multi-information-based carbonatite lithofacies paleogeography reconstruction method and apparatus - Google Patents
Multi-information-based carbonatite lithofacies paleogeography reconstruction method and apparatus Download PDFInfo
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Abstract
The invention provides a multi-information-based carbonatite lithofacies paleogeography reconstruction method and apparatus. The method comprises: according to outcrop data, drilling data of a to-be-studied area under constraint of an ancient fossil zone are established, the drilling data and seismic data are compared, and an isochronous sedimentary strata unit and an isochronous sedimentary strata architecture are determined; on the basis of the clustering methodology, single well lithofacies is analyzed and a sedimentary facies type and a combination relation of the isochronous sedimentary strata unit at the longitudinal direction are determined; an quantitative analysis is carried out on platform sedimentary facies in the sedimentary strata unit based on the seismic data to obtain an quantitative analysis result; a paleogeography contour in the isochronous sedimentary strata unit is determined according to a strata thickness contour map or lithology contour map; and a lithofacies paleogeography pattern of the to-be-studied area is reconstructed by analyzing the isochronous strata architecture, the sedimentary facies type, the sedimentary facies combination relation, the quantitative analysis result, and the paleogeography pattern comprehensively. With the method, the quantitative research on the carbonatite lithofacies paleogeography reconstruction can be realized.
Description
Technical field
The present invention relates to carbonatite lithofacies palaeogeography studying technological domain, particularly a kind of carbonatite lithofacies palaeogeography reconstructing method based on multi information and device.
Background technology
Lithofacies palaeogeography research is an element task of oil-gas geology research, by reinventing the ancient geoaraply general layout in basin, recovery deposition and oil-gas formation preserve the relation of process, thering is provided the important informations such as favourable hydrocarbon source rock, Favorable Reservoir and favourable caprock distribution for oil-gas exploration, is an important step in oil-gas exploration.The lithofacies palaeogeography research in early stage is based on Regional Palaeogeography research; using lithostratigraphy as the Main Basis for studying dividing elements; highlight fixed " phase " this link of field macroscopic view; namely emphasize to utilize the composition of multiple outcrop data study of rocks structure structure Diagenetic, the cross-section structure of sedimentary deposit, ancient ecological and vestigiofossil feature etc.; determine the type and character of sedimentary environment, finally on the basis of regional correlation, combine composite diagram.Feng Zengzhao (1992,1994) on forefathers' Research foundation, proposes " the comprehensive graphing method of single factor analysis ".This method is emphasized to select those factors (i.e. single factor test) that can reflect its Sedimentary environment independently, make various corresponding single factor test map, then these quantitative single factor test maps are stacked up, and in conjunction with this deposition interval of this area other quantitatively and qualitative datas, multianalysis, comprehensive descision, can develop the lithofacies paleographic map of this deposition interval of this area.
Traditional research method Shortcomings part: one, stratigraphic unit divides upper main support lithology information and paleontologic analysis, or relies on lithology information and seismic data merely.Like this in sedimentary facies variation zone because both sides petrofacies are different and Seismic reflection character difference, stratum may be caused cannot to contrast or contrast the phenomenon of mistake, there is risk when facies unit is worn to a great extent, thus what cause the reaction of final lithofacies palaeogeography map is not the paleogeography characteristics of same time period.Its two, the simple lithofacies palaeogeography map precision of outcrop data and drilling data that relies on is lower, and particularly in the basin that degree of prospecting is lower, the paleoareal map that profit is worked out in this way is difficult to reflect objective geologic media.Such as, if do not have drilling well to bore in carbonate platform environment meet a certain facies tract, be easy to be ignored in mapping process, even if can infer that this kind of type of sedimentary facies exists, and also cannot obtain the accurate information of its space distribution according to existing pattern.In recent years, although also have some scholars to attempt utilizing seismic data to assist carry out the reconstruct of carbonatite lithofacies palaeogeography, be also only limitted to describe qualitatively, and lack the analysis of quantification.
Summary of the invention
Embodiments provide a kind of carbonatite lithofacies palaeogeography reconstructing method based on multi information, ensure that and carry out lithofacies palaeogeography reconstruction when waiting in sedimentary formation unit, the quantitative examination to carbonatite lithofacies palaeogeography can be realized simultaneously.The method comprises:
Set up the drilling data under the paleontological fossil belt restraining in area to be studied according to outcrop data, described drilling data and seismic data are contrasted, sedimentary formation unit when determining waiting in area to be studied, stratigraphic framework when determining to wait;
Based on clustering methodology, individual well petrofacies are analyzed, sedimentary formation unit type of sedimentary facies in the vertical and sedimentary tacies association relation when determining each grade;
By seismic data, quantitative analysis is carried out to the tableland sedimentary facies in sedimentary formation unit during each grade, obtain quantitative analysis result;
By the isogram of zone thickness isogram or lithology, ancient geoaraply profile when determining each grade in sedimentary formation unit;
Comprehensive analysis is described when waiting stratigraphic framework, type of sedimentary facies and sedimentary tacies association relation, quantitative analysis result and ancient geoaraply profile, reconstructs the Framework of Lithofacies And Palaeogeography in area to be studied.
In one embodiment, also comprise:
According to stratigraphic framework during described grade, build stratigraphic framework figure when waiting;
According to described type of sedimentary facies and sedimentary tacies association relation, build sedimentary facies composite columnar section;
According to described quantitative analysis result, build seismic facies map;
Comprehensive analysis is described when waiting stratigraphic framework, type of sedimentary facies and sedimentary tacies association relation, quantitative analysis result and ancient geoaraply profile, reconstructs the Framework of Lithofacies And Palaeogeography in area to be studied, comprising:
Comprehensive analysis described wait time stratigraphic framework figure, sedimentary facies composite columnar section, seismic facies map and ancient geoaraply profile, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
In one embodiment, the drilling data under the described paleontological fossil belt restraining setting up area to be studied according to outcrop data, contrasts described drilling data and seismic data, and sedimentary formation unit when determining waiting in area to be studied, specifically comprises:
The Study On Paleontology fossil zone sequence in area to be studied is determined according to outcrop data;
Study On Paleontology fossil zone sequence according to described area to be studied determines that lithostratigraphy demarcates;
Study On Paleontology fossil zone sequence and lithostratigraphy boundary are compared with described drilling data, determines the position of stratigraphic boundary in drilling well;
The position of stratigraphic boundary in drilling well is thrown on seismic section, determines the position of stratigraphic boundary on seismic section;
According to the position of stratigraphic boundary on seismic section, sedimentary formation unit when determining to wait.
In one embodiment, the isogram of described lithology comprise the isogram of grainstone content, the isogram of Sandstone content, the isogram of content of mudstone, the isogram of rock salt content and pierite content isogram one of them or multiple.
Embodiments provide a kind of carbonatite lithofacies palaeogeography reconfiguration device based on multi information, ensure that and carry out lithofacies palaeogeography reconstruction when waiting in sedimentary formation unit, the quantitative examination to carbonatite lithofacies palaeogeography can be realized simultaneously.This device comprises:
Deng time sedimentary formation unit determination module, for set up area to be studied according to outcrop data paleontological fossil belt restraining under drilling data, described drilling data and seismic data are contrasted, sedimentary formation unit when determining waiting in area to be studied, stratigraphic framework when determining to wait;
Sedimentary facies determination module, for analyzing individual well petrofacies based on clustering methodology, sedimentary formation unit type of sedimentary facies in the vertical and sedimentary tacies association relation when determining each grade;
Tableland sedimentary facies quantization modules, for carrying out quantitative analysis by seismic data to the tableland sedimentary facies in sedimentary formation unit during each grade, obtains quantitative analysis result;
Ancient geoaraply profile determination module, for the isogram by zone thickness isogram or lithology, ancient geoaraply profile when determining each grade in sedimentary formation unit;
Framework of Lithofacies And Palaeogeography's reconstructed module, during for comprehensively analyzing described grade, stratigraphic framework, type of sedimentary facies and sedimentary tacies association relation, quantitative analysis result and ancient geoaraply profile, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
In one embodiment, sedimentary formation unit determination module during described grade, also for according to stratigraphic framework during described grade, builds stratigraphic framework figure when waiting;
Described sedimentary facies determination module, also for according to described type of sedimentary facies and sedimentary tacies association relation, builds sedimentary facies composite columnar section;
Described tableland sedimentary facies quantization modules, also for according to described quantitative analysis result, builds seismic facies map;
Described Framework of Lithofacies And Palaeogeography reconstructed module, specifically for comprehensively analyze described wait time stratigraphic framework figure, sedimentary facies composite columnar section, seismic facies map and ancient geoaraply profile, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
In one embodiment, described when waiting sedimentary formation unit determination module specifically for:
The Study On Paleontology fossil zone sequence in area to be studied is determined according to outcrop data;
Study On Paleontology fossil zone sequence according to described area to be studied determines that lithostratigraphy demarcates;
Study On Paleontology fossil zone sequence and lithostratigraphy boundary are compared with described drilling data, determines the position of stratigraphic boundary in drilling well;
The position of stratigraphic boundary in drilling well is thrown on seismic section, determines the position of stratigraphic boundary on seismic section;
According to the position of stratigraphic boundary on seismic section, sedimentary formation unit when determining to wait.
In one embodiment, the isogram of described lithology comprise the isogram of grainstone content, the isogram of Sandstone content, the isogram of content of mudstone, the isogram of rock salt content and pierite content isogram one of them or multiple.
In embodiments of the present invention, the drilling data under the paleontological fossil belt restraining in area to be studied is established by outcrop data, drilling data and seismic data are contrasted, sedimentary formation unit when determining to wait, ensure that carrying out lithofacies palaeogeography reconstruction is in sedimentary formation unit, avoid risk when facies unit is worn when waiting; Sedimentary formation unit type of sedimentary facies in the vertical and sedimentary tacies association relation when determining each grade by clustering methodology; By seismic data, quantitative analysis is carried out to the tableland sedimentary facies in sedimentary formation unit during each grade; By the isogram of zone thickness isogram or lithology, ancient geoaraply profile when determining each grade in sedimentary formation unit, can realize the quantitative examination to carbonatite lithofacies palaeogeography.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part, does not form limitation of the invention.In the accompanying drawings:
The process flow diagram of a kind of carbonatite lithofacies palaeogeography reconstructing method based on multi information that Fig. 1 provides for the embodiment of the present invention;
A kind of carbonatite lithofacies palaeogeography reconfiguration device structural representation based on multi information that Fig. 2 provides for the embodiment of the present invention;
The determination to sedimentary formation unit in the same time limit that Fig. 3 provides for the embodiment of the present invention with follow the trail of schematic diagram;
Fig. 4 for the embodiment of the present invention provide to the Lithology Discrimination schematic diagram in the vertical of sedimentary formation unit in the same time limit;
The platform type identification schematic diagram to sedimentary formation unit in the same time limit that Fig. 5 provides for the embodiment of the present invention;
The schematic diagram of the not isopic zone of sedimentary formation unit in the same time limit that Fig. 6 provides for the embodiment of the present invention;
Dam, Peng Lai group deposit thickness isogram that Fig. 7 provides for the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is described in further details.At this, exemplary embodiment of the present invention and illustrating for explaining the present invention, but not as a limitation of the invention.
The reconstructing method of existing research carbonatite lithofacies palaeogeography, simple dependence lithology information and paleontologic analysis, or rely on lithology information and seismic data merely, risk when lithology units is worn can be there is; Simultaneously existing method just describes qualitatively, and lacks and determine quantitative analysis.If can study based on much information, determining to study is in sedimentary formation unit within the same time limit, and can be quantitative carbonatite lithofacies palaeogeography be studied, then can overcome problems of the prior art.Based on this, the present invention proposes a kind of carbonatite lithofacies palaeogeography reconstructing method based on multi information and device.
The process flow diagram of a kind of carbonatite lithofacies palaeogeography reconstructing method based on multi information that Fig. 1 provides for the embodiment of the present invention; As shown in Figure 1, the method comprises:
Step 101: set up the drilling data under the paleontological fossil belt restraining in area to be studied according to outcrop data, described drilling data and seismic data are contrasted, sedimentary formation unit when determining waiting in area to be studied, stratigraphic framework when determining to wait;
Step 102: individual well petrofacies are analyzed based on clustering methodology, sedimentary formation unit type of sedimentary facies in the vertical and sedimentary tacies association relation when determining each grade;
Step 103: by seismic data, quantitative analysis is carried out to the tableland sedimentary facies in sedimentary formation unit during each grade, obtain quantitative analysis result;
Step 104: by the isogram of zone thickness isogram or lithology, ancient geoaraply profile when determining each grade in sedimentary formation unit;
Step 105: comprehensive stratigraphic framework, type of sedimentary facies and sedimentary tacies association relation, quantitative analysis result and ancient geoaraply profile when analyzing described grade, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
During concrete enforcement, before the sedimentary formation unit determining the same time limit in area to be studied, need according to existing documents and materials, treat research area's plate tectonic setting to analyze, determine the specific tectonic activity in geology period of history area to be studied and the impact on intraplate tectonics general layout thereof.The geographic patterns treating research area is made to have a Preliminary study like this.
After treating research area and having had Preliminary study, just need to determine the sedimentary formation unit belonging to the same time limit.How to determine in area to be studied wait time (same time limit) sedimentary formation unit, various ways can be had, such as, can determine as follows:
The Study On Paleontology fossil zone sequence in area to be studied is determined according to outcrop data;
Study On Paleontology fossil zone sequence according to described area to be studied determines that lithostratigraphy demarcates;
Study On Paleontology fossil zone sequence and lithostratigraphy boundary are compared with described drilling data, determines the position of stratigraphic boundary in drilling well;
The position of stratigraphic boundary in drilling well is thrown on seismic section, determines the position of stratigraphic boundary on seismic section;
According to the position of stratigraphic boundary on seismic section, sedimentary formation unit when determining to wait.
When being determined multiple grade by said method analysis after sedimentary formation unit, can according to determine multiple wait time sedimentary formation unit determine to wait time stratigraphic framework, and then stratigraphic framework figure during structure etc.
When to determine etc. after sedimentary formation unit, when just needing to wait each, sedimentary formation unit carries out detailed analysis.During concrete enforcement, when first determining each grade, sedimentary formation unit type of sedimentary facies in the vertical and sedimentary tacies association relation, can adopt and carry out analysis to determine to individual well petrofacies based on clustering methodology.After determining type of sedimentary facies and sedimentary tacies association relation, sedimentary facies composite columnar section can also be built.
General gets core section well section, can be observed by core, the means such as thin slice observation determine type of sedimentary facies and sedimentary tacies association relation, and for without getting core well section, (object thickness exceedes km, but get core and usually only have tens meters or tens meters), can by carrying out analysis to determine to individual well petrofacies based on clustering methodology.Concrete, first utilize and get core section and carry out accurately determining of lithology, such as petrofacies (lithology) can be spar grainstone, micrite grainstone, particle cryptite and cryptite; Secondly, well logging electrical property feature corresponding for petrofacies is carried out cluster analysis, various petrofacies can well be distinguished.The electrical attribute of different petrofacies is turned back on logging trace, the lithologic properties longitudinally can be obtained.This can help us to set up sedimentary facies sequence according to petrofacies change.
After the type of sedimentary facies determined longitudinally and sedimentary tacies association relation, also need to carry out quantitative analysis to the tableland sedimentary facies in sedimentary formation unit during each grade, obtain quantitative analysis result (transversely).Seismic facies map can also be built according to quantitative analysis result.During concrete enforcement, the platform type in each sedimentary formation unit can be determined by seismic data, such as gentle slope type tableland, fringing type tableland etc.; Not isopic zone can also be determined according to special reflection configuration (such as: protruding reflection configuration, mound shape reflection configuration, wedge-like reflection configuration etc.), on seismic section, determine the quantitative parameter such as width, deposit thickness, distribution area of not isopic zone simultaneously.
After complete to sedimentary formation unit SEDIMENTARY FACIES ANALYSIS in machine and transverse direction during each grade, the ancient geoaraply macro contours of sedimentary formation unit when needing to determine each grade.Concrete, ancient geoaraply macro contours can be determined by zone thickness isogram.Emphasis facies tract can also be determined by the isogram of lithology, and then determine ancient geoaraply macro contours.The isogram of said lithology can comprise isogram of the isogram of such as grainstone content, the isogram of Sandstone content, the isogram of content of mudstone, the isogram of rock salt content and Bai Yun rock content etc., thus the sedimentary facies belt such as determining table Nei Tan, Yun Ping.
After substep has been analyzed, last comprehensive stratigraphic framework, type of sedimentary facies and sedimentary tacies association relation, quantitative analysis result and ancient geoaraply profile when analyzing described grade, reconstructed the Framework of Lithofacies And Palaeogeography in area to be studied.Except analyzing above-mentioned said various information, stratigraphic framework figure, sedimentary facies composite columnar section, seismic facies map and ancient geoaraply profile when can also wait by comprehensive analysis is described, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
Based on same inventive concept, additionally provide a kind of carbonatite lithofacies palaeogeography reconfiguration device based on multi information in the embodiment of the present invention, as described in the following examples.Because the principle of dealing with problems based on the carbonatite lithofacies palaeogeography reconfiguration device of multi information is similar to the carbonatite lithofacies palaeogeography reconstructing method based on multi information, therefore the enforcement based on the carbonatite lithofacies palaeogeography reconfiguration device of multi information see the enforcement of the carbonatite lithofacies palaeogeography reconstructing method based on multi information, can repeat part and repeats no more.Following used, term " unit " or " module " can realize the software of predetermined function and/or the combination of hardware.Although the device described by following examples preferably realizes with software, hardware, or the realization of the combination of software and hardware also may and conceived.
A kind of carbonatite lithofacies palaeogeography reconfiguration device structural representation based on multi information that Fig. 2 provides for the embodiment of the present invention; As shown in Figure 2, this device comprises:
Deng time sedimentary formation unit determination module 201, for set up area to be studied according to outcrop data paleontological fossil belt restraining under drilling data, described drilling data and seismic data are contrasted, sedimentary formation unit when determining waiting in area to be studied, stratigraphic framework when determining to wait;
Sedimentary facies determination module 202, for analyzing individual well petrofacies based on clustering methodology, sedimentary formation unit type of sedimentary facies in the vertical and sedimentary tacies association relation when determining each grade;
Tableland sedimentary facies quantization modules 203, for carrying out quantitative analysis by seismic data to the tableland sedimentary facies in sedimentary formation unit during each grade, obtains quantitative analysis result;
Ancient geoaraply profile determination module 204, for the isogram by zone thickness isogram or lithology, ancient geoaraply profile when determining each grade in sedimentary formation unit;
Framework of Lithofacies And Palaeogeography's reconstructed module 205, during for comprehensively analyzing described grade, stratigraphic framework, type of sedimentary facies and sedimentary tacies association relation, quantitative analysis result and ancient geoaraply profile, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
During concrete enforcement, sedimentary formation unit determination module 201 during described grade, also for according to stratigraphic framework during described grade, builds stratigraphic framework figure when waiting;
Described sedimentary facies determination module 202, also for according to described type of sedimentary facies and sedimentary tacies association relation, builds sedimentary facies composite columnar section;
Described tableland sedimentary facies quantization modules 203, also for according to described quantitative analysis result, builds seismic facies map;
Described Framework of Lithofacies And Palaeogeography reconstructed module 205, specifically for comprehensively analyze described wait time stratigraphic framework figure, sedimentary facies composite columnar section, seismic facies map and ancient geoaraply profile, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
During concrete enforcement, when waiting, sedimentary formation unit determination module 201 specifically may be used for:
The Study On Paleontology fossil zone sequence in area to be studied is determined according to outcrop data;
Study On Paleontology fossil zone sequence according to described area to be studied determines that lithostratigraphy demarcates;
Study On Paleontology fossil zone sequence and lithostratigraphy boundary are compared with described drilling data, determines the position of stratigraphic boundary in drilling well;
The position of stratigraphic boundary in drilling well is thrown on seismic section, determines the position of stratigraphic boundary on seismic section;
According to the position of stratigraphic boundary on seismic section, sedimentary formation unit when determining to wait.
During concrete enforcement; ancient geoaraply profile determination module 204 is except for by except zone thickness isogram determination ancient geoaraply profile; the isogram by lithology can also be used for; ancient geoaraply profile when determining each grade in sedimentary formation unit, and the isogram of described lithology can comprise isogram of the isogram of grainstone content, the isogram of Sandstone content, the isogram of content of mudstone, the isogram of rock salt content and pierite content etc.
The present invention is described in detail to be reconstructed into example below in conjunction with accompanying drawing with Ordovician, tarim Basin lithofacies palaeogeography.In this example, the process of Ordovician, tarim Basin lithofacies palaeogeography reconstruct can comprise:
The first step: first have a Preliminary study by investigation to Ordovician, tarim Basin lithofacies palaeogeography.Known by investigating, dam, Tarim Plate Early Ordovician Epoch Peng Lai group depositional stage is positioned at equator, totally be in stable tension background, and start to change to compressional structure background gradually, stable structural setting and good growing weather condition are beneficial to carbonate platform and grow.
Second step: according to forefathers' data, western part, group depositional stage study area, hawk mountain is carbonate platform phase, and during for determining to wait, the extinct plants and animal of stratigraphic unit is conodont; East is basinal facies, and available extinct plants and animal is chitinozoans, and western and both sides, east lithology, extinct plants and animal type have very big-difference, and seismic reflection lineups are also difficult to follow the trail of.First tableland phase region is studied according to the inventive method:
1. utilize outcrop, determine Peng Lai Ba Zuheyingshan group paleontological fossil band sequence-Condonts zone (in Fig. 3 in the table of left side represented) and determine that lithostratigraphy demarcates on this basis, namely determining the boundary of Peng Lai Ba Zuheyingshan group;
2. by the paleontological fossil band of appearing and the rock signature (lithostratigraphy boundary) of rock and comparing of drilling data, the position of stratigraphic boundary in drilling well is determined;
3. the position of stratigraphic boundary on seismic section is determined by composite traces (being the seismologic record converted to through Prof. Du Yucang with acoustic logging or vertical seismic profile data).
Can process equally (just extinct plants and animal type is different) basin phase region.
After the boundary line of tableland phase region and the boundary line of basin phase region are all determined, can be compared in two boundary lines, and make the appropriate adjustments, final purpose keeps it consistent, thus when to determine etc. sedimentary formation unit.
Repeat step described above 1.-3., can determine to overlap stratigraphic boundary, sedimentary formation unit when finally determining multiple grade, and then stratigraphic framework figure during structure etc. more.Namely each curved lines in Fig. 3 right part of flg represents the same time limit, as Tg5-2 (4295m), Tg5-4 (4503m), Tg6 (5052m) represent a stratigraphic boundary separately, represent the sedimentary formation unit in the same time limit between Tg5-2 (4295m) and Tg5-4 (4503m), between Tg5-4 (4503m) and Tg6 (5052m), represent the sedimentary formation unit in the same time limit.Note: in Fig. 3, Tc1 represents separation; Describe fossil type with Latin in Fossil distribution on the left of in Fig. 3, in right side, same Latin describes fossil type, and these latin texts do not affect the expression to accompanying drawing).
3rd step: analyze individual well petrofacies based on clustering methodology, determines each sedimentary formation unit type of sedimentary facies in the vertical and sedimentary tacies association relation, and builds sedimentary facies composite columnar section.
Utilize to have and get core well section and solve without getting the sedimentary facies recognition problem of core well section, the precondition analyzed like this is without getting core well section and getting core well section and be in same facies tract, its lithologic similarity.First utilize and get core section and carry out accurately determining of petrofacies, such as petrofacies can be spar grainstone, micrite grainstone, particle cryptite and cryptite; Secondly, well logging electrical property feature corresponding for petrofacies is carried out cluster analysis, various petrofacies can well be distinguished.The electrical attribute of different petrofacies is turned back on logging trace, the lithologic properties longitudinally can be obtained, as shown in Figure 4.Wherein, first gamma ray curve is classified as.This can help us to set up sedimentary facies sequence according to petrofacies change.
4th step: by seismic data, quantitative analysis is carried out to the tableland sedimentary facies in each sedimentary formation unit, and build seismic facies map.Concrete, utilize the specific respone image of carbonate platform on seismic data to evaluate platform type, feature, Distribution of Sedimentary Facies and sedimentary facies attribute etc.As shown in Figure 5, it is the platform type utilizing seismic data to determine in some sedimentary formation unit, can find out, in this sedimentary formation unit (belonging to a sedimentary formation unit between Tg7 and Tg8), early stage platform type is carbonatite gentle slope type tableland, and middle and advanced stage transition is fringing type tableland.Meanwhile, multiple facies tract may be comprised in same sedimentary formation unit, seismic section is measured the quantitative parameters such as the width of not isopic zone, deposit thickness, distribution area.Fig. 6 represents the scale of not isopic zone and facies tract.It is also a sedimentary formation unit between note: Tg6 and Tg6-1.
5th step: by the isogram of zone thickness isogram or lithology, determine the ancient geoaraply profile in each sedimentary formation unit.Ancient geoaraply macro contours refers to the position in depression in the position of scene-affinity band, ancient land position, platform etc., as shown in Figure 7 (writing in accompanying drawing 7 does not affect the expression to accompanying drawing), can the position of determining table marginal zone substantially, because significantly concentrating appears in the zone thickness isoline of arrow indication in Fig. 7, show that this band zone thickness occurs sharply to change (scene-affinity band is the maximum position of zone thickness, and contemporaneity basin is the position that zone thickness is relatively little).If also have other parameter, the such as isogram of grainstone content, pierite content, Sandstone content, content of mudstone, rock salt content and Bai Yun rock content etc., according to this can the sedimentary facies belt such as determining table Nei Tan, Yun Ping.
6th step: comprehensive above all information and constructed stratigraphic framework figure, sedimentary facies composite columnar section, seismic facies map when waiting, through eliminating the false and retaining the true, complete lithofacies paleographic map establishment.
In sum, beneficial effect of the present invention is, makes full use of existing data, sets up the method system of the carbonatite lithofacies palaeogeography research that can be used in sedimentary basin, 1) ensure that and carry out lithofacies palaeogeography reconstruction when waiting in sedimentary formation; 2) improve the accuracy without getting core well section SEDIMENTARY FACIES ANALYSIS; 3) the lithofacies palaeogeography quantitative examination of few well area is achieved.In general, result of study is more objective and accurate, and realizes the research of carbonatite lithofacies palaeogeography by qualitative to quantitative conversion.
Obviously, those skilled in the art should be understood that, each module of the above-mentioned embodiment of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the embodiment of the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1., based on a carbonatite lithofacies palaeogeography reconstructing method for multi information, it is characterized in that, comprising:
Set up the drilling data under the paleontological fossil belt restraining in area to be studied according to outcrop data, described drilling data and seismic data are contrasted, sedimentary formation unit when determining waiting in area to be studied, stratigraphic framework when determining to wait;
Based on clustering methodology, individual well petrofacies are analyzed, sedimentary formation unit type of sedimentary facies in the vertical and sedimentary tacies association relation when determining each grade;
By seismic data, quantitative analysis is carried out to the tableland sedimentary facies in sedimentary formation unit during each grade, obtain quantitative analysis result;
By the isogram of zone thickness isogram or lithology, ancient geoaraply profile when determining each grade in sedimentary formation unit;
Comprehensive analysis is described when waiting stratigraphic framework, type of sedimentary facies and sedimentary tacies association relation, quantitative analysis result and ancient geoaraply profile, reconstructs the Framework of Lithofacies And Palaeogeography in area to be studied.
2. the method for claim 1, is characterized in that, also comprises:
According to stratigraphic framework during described grade, build stratigraphic framework figure when waiting;
According to described type of sedimentary facies and sedimentary tacies association relation, build sedimentary facies composite columnar section;
According to described quantitative analysis result, build seismic facies map;
Comprehensive analysis is described when waiting stratigraphic framework, type of sedimentary facies and sedimentary tacies association relation, quantitative analysis result and ancient geoaraply profile, reconstructs the Framework of Lithofacies And Palaeogeography in area to be studied, comprising:
Comprehensive analysis described wait time stratigraphic framework figure, sedimentary facies composite columnar section, seismic facies map and ancient geoaraply profile, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
3. the method for claim 1, it is characterized in that, the drilling data under the described paleontological fossil belt restraining setting up area to be studied according to outcrop data, contrasts described drilling data and seismic data, sedimentary formation unit when determining waiting in area to be studied, specifically comprises:
The Study On Paleontology fossil zone sequence in area to be studied is determined according to outcrop data;
Study On Paleontology fossil zone sequence according to described area to be studied determines that lithostratigraphy demarcates;
Study On Paleontology fossil zone sequence and lithostratigraphy boundary are compared with described drilling data, determines the position of stratigraphic boundary in drilling well;
The position of stratigraphic boundary in drilling well is thrown on seismic section, determines the position of stratigraphic boundary on seismic section;
According to the position of stratigraphic boundary on seismic section, sedimentary formation unit when determining to wait.
4. the method for claim 1; it is characterized in that, the isogram of described lithology comprise the isogram of grainstone content, the isogram of Sandstone content, the isogram of content of mudstone, the isogram of rock salt content and pierite content isogram one of them or multiple.
5., based on a carbonatite lithofacies palaeogeography reconfiguration device for multi information, it is characterized in that, comprising:
Deng time sedimentary formation unit determination module, for set up area to be studied according to outcrop data paleontological fossil belt restraining under drilling data, described drilling data and seismic data are contrasted, sedimentary formation unit when determining waiting in area to be studied, stratigraphic framework when determining to wait;
Sedimentary facies determination module, for analyzing individual well petrofacies based on clustering methodology, sedimentary formation unit type of sedimentary facies in the vertical and sedimentary tacies association relation when determining each grade;
Tableland sedimentary facies quantization modules, for carrying out quantitative analysis by seismic data to the tableland sedimentary facies in sedimentary formation unit during each grade, obtains quantitative analysis result;
Ancient geoaraply profile determination module, for the isogram by zone thickness isogram or lithology, ancient geoaraply profile when determining each grade in sedimentary formation unit;
Framework of Lithofacies And Palaeogeography's reconstructed module, during for comprehensively analyzing described grade, stratigraphic framework, type of sedimentary facies and sedimentary tacies association relation, quantitative analysis result and ancient geoaraply profile, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
6. device as claimed in claim 5, is characterized in that, described sedimentary formation unit determination module when waiting, also for according to stratigraphic framework during described grade, builds stratigraphic framework figure when waiting;
Described sedimentary facies determination module, also for according to described type of sedimentary facies and sedimentary tacies association relation, builds sedimentary facies composite columnar section;
Described tableland sedimentary facies quantization modules, also for according to described quantitative analysis result, builds seismic facies map;
Described Framework of Lithofacies And Palaeogeography reconstructed module, specifically for comprehensively analyze described wait time stratigraphic framework figure, sedimentary facies composite columnar section, seismic facies map and ancient geoaraply profile, reconstruct the Framework of Lithofacies And Palaeogeography in area to be studied.
7. device as claimed in claim 5, is characterized in that, described when waiting sedimentary formation unit determination module specifically for:
The Study On Paleontology fossil zone sequence in area to be studied is determined according to outcrop data;
Study On Paleontology fossil zone sequence according to described area to be studied determines that lithostratigraphy demarcates;
Study On Paleontology fossil zone sequence and lithostratigraphy boundary are compared with described drilling data, determines the position of stratigraphic boundary in drilling well;
The position of stratigraphic boundary in drilling well is thrown on seismic section, determines the position of stratigraphic boundary on seismic section;
According to the position of stratigraphic boundary on seismic section, sedimentary formation unit when determining to wait.
8. device as claimed in claim 5; it is characterized in that, the isogram of described lithology comprise the isogram of grainstone content, the isogram of Sandstone content, the isogram of content of mudstone, the isogram of rock salt content and pierite content isogram one of them or multiple.
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| CN113050164B (en) * | 2019-12-26 | 2024-01-30 | 中国石油天然气股份有限公司 | Method, apparatus, server and storage medium for analyzing deposition sequence |
| CN112213465A (en) * | 2020-09-29 | 2021-01-12 | 西安石油大学 | Method for recovering palygorskite flow direction and original form of volcanic mechanism based on electric imaging logging |
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