CN105740574B - A kind of ancient landform section restoration methods - Google Patents
A kind of ancient landform section restoration methods Download PDFInfo
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Abstract
The present invention relates to a kind of ancient landform section restoration methods, it is characterised in that: 1) establishes sequence stratigraphy framework: carrying out stratigraphic unit division to the target zone of target ancient karst oil gas field, sequence stratigraphy framework whens establishing etc.；2) it obtains ancient landform section and restores data: 1. obtaining superstratum thickness data；2. obtaining sedimentation thickness data；3. obtaining residual thickness data；3) ancient landform sectional view restores: 1. obtaining hatching and well location point；2. obtaining karst palaeotectonic setting line；3. obtaining sedimentation relative contour；4. obtaining stratum residual thickness line；5. completing ancient landform section according to above-mentioned steps to restore, ancient landform sectional view is generated, and indicates every graph element.The present invention is restored by ancient landform sectional view, is improved three-dimensional, restrictive, the quantitative, intuitive of ancient landform research, is enhanced geomorphic unit and portray precision.
Description
Technical field
The present invention relates to a kind of ancient landform section restoration methods, belong to exploration of oil and gas field field.
Background technique
Ancient karst oil gas field is a kind of important oil gas field type, widely distributed in China, such as: Bohai gulf basin Renqiu oil
Field, Tahe Oilfield of The Tarim Basin take turns southern oil gas field and Ordos Basin is pacified the border region gas field etc..The formation of such oil gas field and ground
Shell lifting is closely related with long-term weathering and erosion, rain drop erosion, chemolysis and eluviation, is distributed strictly by karst
The control of ancient landform development characteristics.Meticulous depiction ancient landform unit and its regularity of distribution, to grasp karst reservoir space symbiosis
And Hydrocarbon Enrichment Regularity has great practice significance.
Related palaeogeomorphic research reports more that end result is mainly landforms plan view at present, and geomorphological profile is discussed
State less and rarely seen geomorphic profile.This not only causes geomorphologic map to lack constraint and verifying, and geomorphic unit portrays shortage directly
The property seen, there are randomnesss for the criteria for classifying.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide it is a kind of it is easy intuitive, the ancient landform section of strong operability is extensive
Compound method.
To achieve the above object, the present invention takes following technical scheme: a kind of ancient landform section restoration methods comprising with
Lower step:
1) sequence stratigraphy framework is established
To the target zone of target ancient karst oil gas field, stratigraphic unit division is carried out, sequence stratigraphy framework whens establishing etc.；
2) it obtains ancient landform section and restores data
1. obtaining superstratum thickness data: it is thick to obtain each well superstratum for the layering data implemented according to Strata Comparison
Degree；
2. obtaining sedimentation thickness data: stratum is retained complete well by the layering data implemented according to Strata Comparison
It filters out, determines sedimentation thickness before each well weathering karst；
3. obtaining residual thickness data: the layering data implemented according to Strata Comparison determines each well stratum residual thickness；
3) ancient landform sectional view restores
1. obtaining hatching and well location point: choosing geomorphological profile position, sequence reads section well underground coordinate, calculates between well
Actual range obtains hatching；
2. obtaining karst palaeotectonic setting line: using actual range is abscissa between the section well well, karst palaeotectonic setting
Line number obtains karst palaeotectonic setting line according to being ordinate；
3. obtaining sedimentation relative contour: using actual range is abscissa between the section well well, sedimentation thickness line number
According to for ordinate, sedimentation relative contour is obtained；
4. obtaining stratum residual thickness line: using actual range is abscissa between the section well well, stratum residual thickness line number
According to for ordinate, stratum residual thickness line is obtained；
5. completing ancient landform section according to above-mentioned steps to restore, ancient landform sectional view is generated, and indicates every graph element.
In the step 3), karst palaeotectonic setting line data calculation formula:
Y '=- Y+Ymax+Hmax
In formula, Y ' is karst palaeotectonic setting line number evidence；Y is superstratum thickness；YmaxFor superstratum thickness maximum
Value；HmaxFor sedimentation maximum thickness.
In the step 3), sedimentation relative contour data calculation formula:
H '=Y '-H
In formula, Y ' is karst palaeotectonic setting line number evidence；H is sedimentation thickness；H ' is sedimentation relative contour data.
In the step 3), stratum residual thickness line data calculation formula:
H '=H '+h
In formula, H ' is sedimentation relative contour data；H is stratum residual thickness；H ' is stratum residual thickness line number evidence.
In the step 2), sedimentation thickness is obtained by trend analysis method before each well weathering karst.
Ymax+HmaxThe desirable integer more than or equal to sum of the two.
The invention adopts the above technical scheme, which has the following advantages: 1, the present invention is extensive by ancient landform sectional view
It is multiple, three-dimensional, restrictive, the quantitative, intuitive of ancient landform research is improved, geomorphic unit is enhanced and portrays precision.2, originally
Inventive method is directly used in the recovery of ancient landform section, and then is applied to palaeokarst-related reservoir genesis mechanism, rich accumulation of oil and gas and advises at hiding
Numerous aspects such as rule, Favorable Areas screening and well site deployment.
Detailed description of the invention
Fig. 1 is flow chart of the invention；
Fig. 2 is the ancient landform spread figure of the embodiment of the present invention；
Fig. 3 is the weathering crust superstratum thickness chart of the embodiment of the present invention；
Fig. 4 is the weathering crust sedimentation thickness chart of the embodiment of the present invention；
Fig. 5 is the weathering crust stratum residual thickness figure of the embodiment of the present invention；
Fig. 6 is the recovery figure of the hatching of the embodiment of the present invention；
Fig. 7 is the recovery figure of the karst palaeotectonic setting line of the embodiment of the present invention；
Fig. 8 is the recovery figure of the sedimentation relative contour of the embodiment of the present invention；
Fig. 9 is the recovery figure of the stratum residual thickness line of the embodiment of the present invention；
Figure 10 is the ancient landform section recovery figure of the embodiment of the present invention.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, ancient landform section restoration methods of the invention the following steps are included:
1 establishes sequence stratigraphy framework
First to the target zone of target ancient karst oil gas field (i.e. weathering crust stratum), using conventional Stratigraphic Division And Correlation method
Carry out stratigraphic unit division, establish etc. whens sequence stratigraphy framework；
2, which obtain ancient landform section, restores data
2.1 obtain superstratum thickness data: it is thick to obtain each well superstratum for the layering data implemented according to Strata Comparison
Degree is according to Y；
2.2 acquisition sedimentation thickness datas: ancient karst will lead to missing and stratum exposure difference, i.e. stratum at the top of stratum
Reserving degree is different.According to the layering data that Strata Comparison is implemented, stratum is retained into complete well screen and is elected, passes through trend point
Analysis method determines sedimentation thickness H before each well weathering karst；
2.3 obtain residual thickness data: the layering data implemented according to Strata Comparison determines each well stratum residual thickness h；
Wherein, the target zone of ancient karst oil gas field is commonly referred to as weathering crust stratum in geology.
3 ancient landform sectional views restore
3.1 obtain hatching and well location point: choosing geomorphological profile position, sequence reads section well underground coordinate, calculates well
Between actual range, obtain hatching；
3.2 obtain karst palaeotectonic setting line: due to the superstratum and mesh stratum stratum of ancient karst oil gas field target zone
Between in filling up relationship, therefore impression method is generallyd use, according to weathering crust superstratum thickness to karst palaeotectonic setting
Restored.General superstratum thickness is small, then is in karst paleostructure high-order bit；Conversely, being then in karst paleostructure lower curtate
Position.
Using actual range between the section well well as abscissa, karst palaeotectonic setting line number is ordinate according to Y ', obtains rock
Molten palaeotectonic setting line, karst palaeotectonic setting line number is according to Y ' calculation formula:
Y '=- Y+Ymax+Hmax
In formula, Y ' is karst palaeotectonic setting line number evidence；Y is superstratum thickness；YmaxFor superstratum thickness maximum
Value；HmaxFor sedimentation maximum thickness；
Wherein, it is contemplated that mapping is beautiful rationally, Ymax+HmaxThe desirable integer more than or equal to sum of the two.
3.3 obtain sedimentation relative contour: using actual range is abscissa between the section well well, sedimentation thickness line number
It is ordinate according to H ', obtains sedimentation relative contour, sedimentation relative contour data H ' calculation formula:
H '=Y '-H
In formula, Y ' is karst palaeotectonic setting line number evidence；H is sedimentation thickness；H ' is sedimentation relative contour data；
3.4 obtain stratum residual thickness line: using actual range is abscissa between the section well well, stratum residual thickness line number
It is ordinate according to h ', obtains stratum residual thickness line, stratum residual thickness line number is according to h ' calculation formula:
H '=H '+h
In formula, H ' is sedimentation relative contour data；H is stratum residual thickness；H ' is stratum residual thickness line number evidence；
3.5, which complete ancient landform section according to above-mentioned steps, restores, and generates ancient landform sectional view, and indicates every graph and want
Element.
Below by a specific embodiment, technical effect of the invention is further illustrated.
Embodiment
As shown in Fig. 2, gas field of pacifying the border region is a typical ancient rock using 330 wellblock of gas field east Shan of pacifying the border region as research object
Molten gas field, in caledonian movement advanced stage, the gas field is integrally lifted, and makes to expose under earth's surface after the regression of Eopaleozoic Middle Ordovician
Paleozoic group carbonate rock is subject to weathering and erosion, rain drop erosion and the chemolysis of 130Ma, eluviation, forms Ma Jiagou
Five sections of top crust reservoirs of weathering of group.
1) sequence stratigraphy framework is established
Using conventional Stratigraphic Division And Correlation method carry out the division of weathering crust stratigraphic unit, establish etc. whens sequence stratigraphy framework；
2) ancient landform section restores data preparation
It obtains superstratum thickness data: data being layered according to the 330 wellblock drilling well of east Shan, it is thick to obtain each well superstratum
Degree generates superstratum thickness chart (as shown in Figure 3) according to Y.Wherein, local area superstratum is the Carboniferous System；
It obtains sedimentation thickness data: data being layered according to the 330 wellblock drilling well of east Shan, stratum is retained into complete well
It screens, by trend analysis, determines sedimentation thickness H before each well weathering karst, generate sedimentation thickness chart
(as shown in Figure 4)；
It obtains residual thickness data: data being layered according to the 330 wellblock drilling well of east Shan, determines each well stratum residual thickness h,
It generates stratum residual thickness figure (as shown in Figure 5)；
3) ancient landform sectional view restores
It obtains hatching and well location point: choosing in Fig. 2, B-B1 profile position, sequence reads section well underground coordinate, meter
Actual range (as shown in table 1) between calculation well, generates hatching (as shown in Figure 6)；
Actual range between 1 NS2 section well of table
Obtain karst palaeotectonic setting line: using actual range between well as abscissa, karst palaeotectonic setting line number is according to Y '
Ordinate obtains karst palaeotectonic setting line (as shown in Figure 7)；
Due to Ymax+Hmax=70.88+60.2=131.08 (m), it is contemplated that mapping is beautiful rationally, take C=200 (>
131.08)；
Obtain sedimentation relative contour: using actual range between well as abscissa, sedimentation relative contour data H ' is vertical sits
Mark obtains sedimentation relative contour (as shown in Figure 8)；
Obtain stratum residual thickness line: using actual range between well as abscissa, stratum residual thickness line number is vertical sit according to h '
Mark obtains stratum residual thickness line (as shown in Figure 9)；
The ancient landform section for completing B-B1 section restores, and indicates every graph element (as shown in Figure 10), specific data
As shown in table 2.
2 ancient landform sectional view of table restores data
Above description is only embodiments herein and the explanation to institute's application technology principle.Those skilled in the art answer
Work as understanding, invention scope involved in the application, however it is not limited to technical solution made of the specific combination of above-mentioned technical characteristic,
It should also cover in the case where not departing from the inventive concept simultaneously, carry out any group by above-mentioned technical characteristic or its equivalent feature
The other technical solutions closed and formed.Such as features described above and (but being not limited to) disclosed herein have the skill of similar functions
Art feature is replaced mutually and the technical solution that is formed.
Claims (6)
1. a kind of ancient landform section restoration methods comprising following steps:
1) sequence stratigraphy framework is established
To the weathering crust stratum of target ancient karst oil gas field, stratigraphic unit division is carried out, sequence stratigraphy framework whens establishing etc.；
2) it obtains ancient landform section and restores data
1. obtaining superstratum thickness data: the layering data implemented according to Strata Comparison obtains each well superstratum thickness；
2. obtaining sedimentation thickness data: stratum is retained complete well screen and selected by the layering data implemented according to Strata Comparison
Out, sedimentation thickness before each well weathering karst is determined；
3. obtaining residual thickness data: the layering data implemented according to Strata Comparison determines each well stratum residual thickness；
3) ancient landform sectional view restores
1. acquisition hatching and well location point: choosing geomorphological profile position, sequence reads section well underground coordinate, calculates reality between well
Distance obtains hatching；
2. obtaining karst palaeotectonic setting line: using actual range is abscissa between the section well well, karst palaeotectonic setting line number
According to for ordinate, karst palaeotectonic setting line is obtained；
3. obtaining sedimentation relative contour: using actual range between the section well well as abscissa, sedimentation relative contour data are
Ordinate obtains sedimentation relative contour；
4. obtaining stratum residual thickness line: using actual range between the section well well as abscissa, residual thickness line number evidence in stratum is
Ordinate obtains stratum residual thickness line；
5. completing ancient landform section according to above-mentioned steps to restore, ancient landform sectional view is generated, and indicates every graph element.
2. a kind of ancient landform section restoration methods as described in claim 1, it is characterised in that: in the step 3), karst is ancient
Tectonic setting line data calculation formula:
Y '=- Y+Ymax+Hmax
In formula, Y ' is karst palaeotectonic setting line number evidence；Y is superstratum thickness；YmaxFor superstratum maximum thickness；Hmax
For sedimentation maximum thickness.
3. a kind of ancient landform section restoration methods as described in claim 1, it is characterised in that: in the step 3), stratum is heavy
Product relative contour data calculation formula:
H '=Y '-H
In formula, Y ' is karst palaeotectonic setting line number evidence；H is sedimentation thickness；H ' is sedimentation relative contour data.
4. a kind of ancient landform section restoration methods as described in claim 1, it is characterised in that: in the step 3), stratum is residual
Stay relative contour data calculation formula:
H '=H '+h
In formula, H ' is sedimentation relative contour data；H is stratum residual thickness；H ' is stratum residual thickness line number evidence.
5. a kind of ancient landform section restoration methods as described in claim 1, it is characterised in that: in the step 2), each well wind
Sedimentation thickness is obtained by trend analysis method before changing karst.
6. a kind of ancient landform section restoration methods as claimed in claim 2, it is characterised in that: Ymax+HmaxIt is desirable to be greater than or wait
In the integer of sum of the two.
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| CN107015290B (en) * | 2017-03-13 | 2018-05-08 | 西北大学 | A kind of method that reworked garden basin primary deposit looks are recovered |
| CN108734779B (en) * | 2017-04-17 | 2021-07-30 | 中国石油化工股份有限公司 | Ancient landform restoration method |
| CN107167853A (en) * | 2017-06-01 | 2017-09-15 | 陕西延长石油(集团)有限责任公司研究院 | A kind of fine method for recovering Palaeokarst Landform |
| CN107589470B (en) * | 2017-08-24 | 2019-05-03 | 西南石油大学 | Palaeokarst Landform restoration methods in small area |
| CN110794477B (en) * | 2018-08-03 | 2022-03-01 | 中国石油天然气股份有限公司 | Method for identifying overtaking stratum pinch-out line by combining well and seismic |
| CN110361781B (en) * | 2019-08-14 | 2020-10-09 | 西南石油大学 | Sedimentary-phase ancient landform restoration method based on seismic reflection amplitude analysis |
| CN111983678B (en) * | 2020-07-22 | 2024-02-23 | 中海石油(中国)有限公司深圳分公司 | Method for rapidly evaluating development potential of deep water sand body |
| CN112130210B (en) * | 2020-09-03 | 2024-07-26 | 中国石油天然气集团有限公司 | Well position optimization method and device based on ancient and modern geological elements |
| CN113009591B (en) * | 2020-11-03 | 2023-04-07 | 中国石油天然气股份有限公司 | Ancient landform restoration method |
| CN113312695B (en) * | 2021-05-26 | 2022-03-11 | 成都理工大学 | Ancient landform restoration method based on trend surface analysis |
| CN113640870B (en) * | 2021-07-27 | 2024-02-23 | 中国石油天然气股份有限公司西南油气田分公司勘探开发研究院 | Method, system and equipment for recovering sedimentary paleo-topography of karst ablation interface |
| CN114415233B (en) * | 2022-01-20 | 2024-06-25 | 北京师范大学 | Method for recovering morphology of stratum of mined fossil energy |
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