CN103218750B - A kind of geology evaluation method for offshore sedimentary rock oil field - Google Patents
A kind of geology evaluation method for offshore sedimentary rock oil field Download PDFInfo
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- CN103218750B CN103218750B CN201310115695.3A CN201310115695A CN103218750B CN 103218750 B CN103218750 B CN 103218750B CN 201310115695 A CN201310115695 A CN 201310115695A CN 103218750 B CN103218750 B CN 103218750B
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Abstract
The present invention relates to a kind of geology evaluation method for offshore sedimentary rock oil field, comprise the following steps: make geological analogs figure; Each geologic parameter in target oil field is marked on geological analogs figure, obtains some target oil fields gauge point, connect in turn along each polar axis shaft successively, obtain target oil field polygon; That selects to carry out analogy with target oil field treats analogy oil field, and each is treated each geologic parameter in analogy oil field marks respectively and obtain somely treating analogy oil field gauge point, and connect in turn along each polar axis shaft successively, obtain this and treat analogy oil field polygon, the like, obtain needed analogy oil field polygon, each is treated analogy oil field polygon and target oil field polygonal shape carry out analogy one by one, tentatively determine the oil field similar to target field characteristics; Each obtaining after primary election is treated that postsearch screening is carried out in analogy oil field, obtains the highlyest with target oil field geologic feature similarity degree treating analogy oil field; Treat analogy oil field according to what obtain, instruct target oil field to work out development strategy.The present invention can be widely used in the assessment of marine sedimentogeneous rock oil field geologic and oil-field development.
Description
Technical field
The present invention relates to a kind of oil field geologic appraisal procedure, particularly about a kind of geology evaluation method for offshore sedimentary rock oil field.
Background technology
In the offshore oilfield early-stage Study stage, target oil field data is limited, and screening carries out comparative study with the similar oil field of target oil field geologic situation, work out development strategy to instruct target oil field and development scheme extremely important.But sedimentogeneous rock oil field geologic analogue investigation works, technical thought unfixing for a long time and research method, achievement in research depends on researcher's geology experiences always, the mode that research method adopts for a long time " face telepathy is awarded ", there is the drawbacks such as difficulty is quantitative, uncertain strong, difficult standardization, be unfavorable for that offshore oilfield is efficient, high_speed development.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of standardized geology evaluation method for offshore sedimentary rock oil field, existing oil field experience high speed, Efficient Development target oil field can be used for reference.
For achieving the above object, the present invention takes following technical scheme: a kind of geology evaluation method for offshore sedimentary rock oil field, it comprises the following steps: the geologic parameter 1) used required for development goal oil field, make a geological analogs figure, the manufacturing process of described geological analogs figure is: set up an XOY coordinate system, from true origin O, interval arranges several polar axis shafts, each polar axis shaft represents a certain geologic parameter, according to the difference of each geologic parameter, each polar axis shaft is provided with different scales, connotation represented by each scale is determined according to corresponding geologic parameter type, 2) each geologic parameter in described target oil field is corresponding in turn on each polar axis shaft being marked at described geological analogs figure, each polar axis shaft of described geological analogs figure obtains some target oil fields gauge point, and target oil field gauge point described in each is connected in turn along each polar axis shaft successively from the first quartile of XOY coordinate system, obtain target oil field polygon, 3) according to actual needs, that selects to carry out analogy with described target oil field treats analogy oil field, and will treat described in each that each geologic parameter in analogy oil field is marked on each polar axis shaft of described geological analogs figure respectively, each polar axis shaft of described geological analogs figure obtains somely treat analogy oil field gauge point, and the gauge point treated described in each corresponding to analogy oil field is connected in turn along each polar axis shaft successively from the first quartile of XOY coordinate system, obtain this and treat analogy oil field polygon, the like, obtain needed analogy oil field polygon, 4) by described target oil field and treat that all polygons in analogy oil field are superimposed in described geological analogs figure, each is treated analogy oil field polygon and target oil field polygonal shape carry out analogy one by one, tentatively determine the oil field similar to described target field characteristics, 5) each obtaining after preliminary screening is treated the geologic parameter in analogy oil field and the geologic parameter in target oil field compare, and carry out postsearch screening according to the criterion of setting, obtain the highlyest with described target oil field geologic feature similarity degree treating analogy oil field, 6) according to described target oil field geologic characteristic similarity the highest treat analogy oil field, instruct described target oil field to work out development strategy and development scheme.
Described step 5) obtains the highlyest with described target oil field geologic feature similarity degree treating analogy oil field, comprises the following steps: 1. calculate the qualified area of a polygon treating analogy oil field after the polygon facet sum preliminary screening of described target oil field first respectively; 2. the area of a polygon ratio respectively treating analogy oil field and target oil field is calculated; 3. each is treated that analogy oil field calculates the quantitative parameter difference content in its various geology quantitative parameter and target oil field successively; 4. the similarity treating analogy oil field and target oil field according to the criterion of setting is evaluated successively, from respectively treating to obtain analogy oil field the highlyest with described target oil field similarity to treat analogy oil field.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the geologic parameter that the present invention uses required for development goal oil field, make geological analogs figure, the manufacturing process of geological analogs figure is: set up XOY coordinate system, from true origin O, interval arranges several polar axis shafts, each polar axis shaft represents a certain geologic parameter, according to the difference of each geologic parameter, each polar axis shaft is provided with different scales, connotation represented by each scale is determined according to corresponding geologic parameter type, the layout of the present invention to every root coordinate axis is carried out well-designed, thus make analogy content, meaning is very clear, developer can by geological analogs figure to target oil field and existingly treat that analogy oil field is assessed, therefore the present invention instructs developer to find the oil field similar to target oil field with standardization diagramatic way, method of work is simple, personnel even without geological analogy research experience also can left-hand seat at once, the impact of " research experience " is down to minimum.2, geologic parameter on geological analogs figure of the present invention includes qualitative parameter and quantitative parameter, by target oil field with treat that each geologic parameter in analogy oil field is corresponding in turn to and be marked on each polar axis shaft of geological analogs figure, treat that analogy oil field polygon and target oil field polygonal shape are to target oil field with treat that primary election is carried out in analogy oil field by each, then each obtaining after preliminary screening is treated that the geologic parameter in analogy oil field and the geologic parameter in target oil field compare, and carry out postsearch screening according to the criterion of setting, obtain the oil field the highest with target oil field geologic feature similarity degree, rich connotation of the present invention, clear layer, adopt the mode of combination of qualitative and quantitative analysis, can be at a high speed, select the oil field the highest with target oil field similarity efficiently, and according to the oil field the highest with target oil field geologic characteristic similarity, target oil field is instructed to work out development strategy and development scheme.The present invention can be widely used in the assessment of marine sedimentogeneous rock oil field geologic and oil-field development.
Accompanying drawing explanation
Fig. 1 is the geological analogs schematic diagram in the marine sedimentogeneous rock oil field of the present invention, in figure
represent target oil field,
represent and treat analogy oil field A,
represent and treat analogy oil field B,
represent and treat analogy oil field C,
represent and treat analogy oil field D.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Geology evaluation method for offshore sedimentary rock oil field of the present invention, comprises the following steps:
1, the geologic parameter used required for development goal oil field, makes a geological analogs figure.
As shown in Figure 1, set up an XOY coordinate system, the geologic parameter used needed for development goal oil field, from true origin O, interval arranges several polar axis shafts, each polar axis shaft represents a certain geologic parameter, according to the difference of each geologic parameter, each polar axis shaft is provided with different scales, the connotation represented by each scale is determined according to corresponding geologic parameter type.
The geologic parameter that embodiments of the invention are used needed for development goal oil field makes geological analogs figure, this geological analogs figure comprises 10 kinds of geologic parameters, but be not limited thereto, can determine according to actual needs, embodiments of the invention are arranged at intervals with 10 polar axis shafts from true origin O, the geologic parameter that 10 polar axis shafts represent respectively is: structure, stratum, deposition, lithology, three grades of geologic reserve, zone thickness, sandstone thickness, sandy ground ratio, permeability and factor of porosity, with the dotted line in Fig. 1 for boundary, be positioned at the structure of dotted line side, stratum, deposition and lithology are the qualitative parameter in marine sedimentogeneous rock oil field, according to the order in the outside from true origin to polar axis shaft, the scale that polar axis shaft corresponding to structure is arranged represents respectively: rift, down warping region and foreland, the scale that polar axis shaft corresponding to stratum is arranged represents respectively: pre Tertiary, Paleogene and Neogene, the scale that polar axis shaft corresponding to deposition is arranged represents respectively: braided stream, meandering river, shallow-circulation flow, delta, fan dalta, subaqueous fans and basin floor fan, the scale that polar axis shaft corresponding to lithology is arranged represents respectively: petroclastic rock, carbonatite, metamorphosed rock and pyrogenic rock, be positioned at the quantitative parameter that three grades of geologic reserve of dotted line opposite side, zone thickness, sandstone thickness, sandy ground ratio, permeability and factor of porosity are marine sedimentogeneous rock, wherein, the unit of the scale that the polar axis shaft that three grades of geologic reserve are corresponding is arranged is incomparably (× 10
4m
3), be followed successively by: 3000,5000,7000 and 9000, the unit of the scale that the polar axis shaft that zone thickness is corresponding is arranged is rice (m), is followed successively by: 100,300,500 and 700, the unit of the scale that the polar axis shaft that sandstone thickness is corresponding is arranged is rice (m), is followed successively by: 50,150,250 and 350, sandy ground is percentage (%) than the unit of the scale that corresponding polar axis shaft is arranged, and is followed successively by: 10,25,40 and 55, the unit of the scale that the polar axis shaft that permeability is corresponding is arranged is millidarcy (mD), is followed successively by: 10,100,1000 and 10000, the unit of the scale that the polar axis shaft that factor of porosity is corresponding is arranged is percentage (%), is followed successively by: 10,20,30 and 40.
2, each geologic parameter in target oil field is corresponding in turn to is marked on each polar axis shaft of geological analogs figure, now on each polar axis shaft of geological analogs figure, obtain some target oil fields gauge point, then each target oil field gauge point is connected in turn along each polar axis shaft successively from the first quartile of XOY coordinate system, obtain target oil field polygon.
3, according to actual needs, select to carry out analogy with target oil field existing developed treat analogy oil field, and each is treated each geologic parameter in analogy oil field is marked on each polar axis shaft of geological analogs figure respectively, now obtain somely treating analogy oil field gauge point on each polar axis shaft of geological analogs figure, then each is treated that the gauge point corresponding to analogy oil field connects in turn along each polar axis shaft successively from the first quartile of XOY coordinate system, obtain this and treat analogy oil field polygon, the like, obtain needed analogy oil field polygon.
4, by target oil field with treat that all polygons in analogy oil field are superimposed in geological analogs figure, then each is treated that analogy oil field polygon and target oil field polygonal shape carry out analogy, tentatively determine the oil field similar to target field characteristics, detailed process is: treat that if a certain analogy oil field and target oil field have the qualitative parameter of more than 3 consistent, and the quantitative parameter scope of more than 4 is close to then tentatively determining that this treats that analogy oil field is similar to target oil field.In embodiments of the invention, the oil field similar to target oil field through preliminary screening is: treat analogy oil field A, treat analogy oil field B, treat analogy oil field C and treat analogy oil field D.
5, each obtaining after preliminary screening is treated the geologic parameter in analogy oil field and the geologic parameter in target oil field compare, and carry out postsearch screening according to the criterion of setting, obtain the oil field the highest with target oil field geologic feature similarity degree, detailed process is:
1) calculate the qualified area of a polygon treating analogy oil field after target oil field polygon facet sum preliminary screening first respectively, in the embodiment of the present invention, the required area of a polygon calculated comprises: target oil field area of a polygon and treat analogy oil field A, treat analogy oil field B, treat analogy oil field C and treat the area of a polygon of analogy oil field D;
2) the area of a polygon ratio respectively treating analogy oil field and target oil field is calculated successively:
In formula, S represents target oil field area of a polygon, S
irepresent and treat analogy oil field area, i=1 represents and treats analogy oil field A, and i=2 represents and treats analogy oil field B, and i=3 represents and treats analogy oil field C, and i=4 represents and treats analogy oil field D, K in embodiments of the invention
iresult of calculation as shown in table 1:
Table 1
| Oil field | K i |
| Treat analogy oil field A | 0.95 |
| Treat analogy oil field B | 0.97 |
| Treat analogy oil field C | 0.75 |
| Treat analogy oil field D | 0.73 |
3) each is treated that analogy oil field calculates the quantitative parameter difference content in its various quantitative parameter and target oil field successively:
In formula, X
nrepresent the geologic parameter corresponding to target oil field, wherein X
1represent three grades of ground indicated reserves c2s, X
2represent zone thickness, X
3represent sandstone thickness, X
4represent sandy ground ratio, X
5represent permeability, X
6represent factor of porosity, j represents respectively and respectively treats analogy oil field, for treating analogy oil field A, treating analogy oil field B, treat analogy oil field C and treating analogy oil field D in the embodiment of the present invention, such as: X
11represent three grades of ground indicated reserves c2, X treating analogy oil field A
12represent the zone thickness treating analogy oil field A, X
13represent the sandstone thickness treating analogy oil field A, X
14represent the sandy ground ratio, the X that treat analogy oil field A
15represent the permeability treating analogy oil field A, X
16represent and treat the factor of porosity of analogy oil field A, other treats the quantitative parameter in analogy oil field, and do not repeat them here, the quantitative parameter difference content in each oil field of embodiments of the invention is as shown in table 2:
Table 2
4) similarity treating analogy oil field and target oil field according to the criterion of setting is evaluated again, from treating to obtain the oil field the highest with target oil field similarity analogy oil field, detailed process: show according to Bohai gulf basin multiple oil fields statistics, treats analogy oil field K according to table 3 is each
iit is medium above and have more than 3 in 6 quantitative parameters that value evaluates similarity degree
value to reach similarity degree medium, namely as the oil field high with target oil field similarity, if obtain more than one oil field high with target oil field similarity, then preferred K
ibe worth closest to 1 oil field as final and that target oil field similarity is the highest oil field, the parameter evaluation standard set by embodiments of the invention is as shown in table 3:
Table 3
6, according to target oil field geologic characteristic similarity the highest treat analogy oil field, for working out development strategy and development scheme to target oil field, that is: when target oil field produces in the future, well number, well type, well location and well pattern pattern etc. used can design with reference to the analogy oil field for the treatment of the highest with its similarity, can estimate target oil field future oil-production capacity and output simultaneously, assess its economy.
The various embodiments described above are only for illustration of the present invention, and each step etc. that wherein method is implemented all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (1)
1. a geology evaluation method for offshore sedimentary rock oil field, it comprises the following steps:
1) geologic parameter used required for development goal oil field, make a geological analogs figure, the manufacturing process of described geological analogs figure is: set up an XOY coordinate system, from true origin O, interval arranges several polar axis shafts, each polar axis shaft represents a certain geologic parameter, according to the difference of each geologic parameter, each polar axis shaft is provided with different scales, the connotation represented by each scale is determined according to corresponding geologic parameter type;
2) each geologic parameter in described target oil field is corresponding in turn on each polar axis shaft being marked at described geological analogs figure, each polar axis shaft of described geological analogs figure obtains some target oil fields gauge point, and target oil field gauge point described in each is connected in turn along each polar axis shaft successively from the first quartile of XOY coordinate system, obtain target oil field polygon;
3) according to actual needs, that selects to carry out analogy with described target oil field treats analogy oil field, and will treat described in each that each geologic parameter in analogy oil field is marked on each polar axis shaft of described geological analogs figure respectively, each polar axis shaft of described geological analogs figure obtains somely treat analogy oil field gauge point, and the gauge point treated described in each corresponding to analogy oil field is connected in turn along each polar axis shaft successively from the first quartile of XOY coordinate system, obtain this and treat analogy oil field polygon, the like, obtain needed analogy oil field polygon;
4) by described target oil field and treat that all polygons in analogy oil field are superimposed in described geological analogs figure, each is treated analogy oil field polygon and target oil field polygonal shape carry out analogy one by one, tentatively determine the oil field similar to described target field characteristics;
5) each obtaining after preliminary screening is treated the geologic parameter in analogy oil field and the geologic parameter in target oil field compare, and carry out postsearch screening according to the criterion of setting, obtain the highlyest with described target oil field geologic feature similarity degree treating analogy oil field, comprise the following steps:
1. the qualified area of a polygon treating analogy oil field after the polygon facet sum preliminary screening of described target oil field is calculated first respectively;
2. calculate and respectively treat that K is compared with the area of a polygon in target oil field in analogy oil field
i;
3. each is treated that analogy oil field calculates the quantitative parameter difference content in its various geology quantitative parameter and target oil field successively:
In formula, X
nrepresent the geologic parameter corresponding to target oil field, wherein, X
1represent three grades of ground indicated reserves c2s, X
2represent zone thickness, X
3represent sandstone thickness, X
4represent sandy ground ratio, X
5represent permeability, X
6represent factor of porosity, j represents respectively and respectively treats analogy oil field;
4. the similarity treating analogy oil field and target oil field according to the criterion of setting is evaluated successively, from respectively treating to obtain analogy oil field the highlyest with described target oil field similarity to treat analogy oil field, is specially: treat analogy oil field K according to following table is each
iit is medium above and have more than 3 in 6 quantitative parameters that value evaluates similarity degree
value to reach similarity degree medium, namely as the oil field high with target oil field similarity, if obtain more than one oil field high with target oil field similarity, then preferred K
ibe worth closest to 1 oil field as final and that target oil field similarity is the highest oil field, wherein, criterion is:
6) according to described target oil field geologic characteristic similarity the highest treat analogy oil field, instruct described target oil field to work out development strategy and development scheme.
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| CN105844082B (en) * | 2016-03-11 | 2018-11-02 | 西安石油大学 | The judgment method and system of phase are dominated in a kind of deposition phasor |
| CN109594979B (en) * | 2018-11-15 | 2022-04-22 | 中国海洋石油集团有限公司 | Well trajectory-based method for calculating parameters of interlayer inside diversion sand dam |
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| CN113240321A (en) * | 2021-05-31 | 2021-08-10 | 中海石油(中国)有限公司 | Oil field analogy evaluation method and system based on deep learning |
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| 在实践工作中对沉积岩的研究;夏峰;《中国石油和化工标准与质量》;20111031;第31卷(第10期);第236页 * |
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