CN103218750A - Geology evaluation method for offshore sedimentary rock oil field - Google Patents
Geology evaluation method for offshore sedimentary rock oil field Download PDFInfo
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Abstract
The invention relates to a geology evaluation method for an offshore sedimentary rock oil field. The geology evaluation method for the offshore sedimentary rock oil field comprises the following steps of: manufacturing a geology analog map; marking each geological parameter of a target oil field onto the geology analog map to obtain a plurality of target oil field mark points; successively connecting the target oil field mark points along each stage coordinate axis in order to obtain a target oil field polygon; selecting oil fields to be subjected to analogy with the target oil field; respectively marking each geological parameter of each oil field to be subjected to analogy to obtain a plurality of oil field mark points to be subjected to analogy; successively connecting the oil field mark points along each stage coordinate axis in order to obtain a polygon of the oil field to be subjected to analogy, and so forth, obtaining the polygons of all the oil fields to be subjected to analogy; carrying out analogy to the shape of the polygon of each oil field to be subjected to analogy with the shape of the target oil field polygon, and preliminarily determining the oil fields with the similar characteristic with the target oil field; carrying out secondary screening to each oil field to be subjected to analogy, which is obtained by original selection, so as to obtain the oil field to be subjected to analogy, which has the highest level of similarity with the oil field geology characteristic; and according to the obtained oil field to be subjected to analogy, guiding the target oil field to formulate a development strategy. The geology evaluation method for the offshore sedimentary rock oil field, which is disclosed by the invention, can be widely applied to the geology evaluation of the offshore sedimentary rock oil field and the oil field development.
Description
Technical field
The present invention relates to a kind of oil field geologic appraisal procedure, particularly about a kind of marine sedimentogeneous rock oil field geologic appraisal procedure.
Background technology
In the offshore oilfield early-stage Study stage, target oil field data is limited, and screening compares research with the similar oil field of target oil field geologic situation, to instruct target oil field formulation development strategy and development scheme extremely important.But sedimentogeneous rock oil field geologic analogue investigation work, there are not fixing technical thought and research method for a long time, achievement in research depends on researcher's geology experiences always, research method adopts the mode of " the face telepathy is awarded " for a long time, have difficult quantitative, drawbacks such as uncertainty is strong, difficult standardization, be unfavorable for efficient, the exploitation at a high speed of offshore oilfield.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of standardized marine sedimentogeneous rock oil field geologic appraisal procedure, can use for reference existing oil field experience high speed, efficient development goal oil field.
For achieving the above object, the present invention takes following technical scheme: a kind of marine sedimentogeneous rock oil field geologic appraisal procedure, it may further comprise the steps: 1) according to the required geologic parameter of using in development goal oil field, make a geology analogy figure, the manufacturing process of described geology analogy figure is: set up an XOY coordinate system, begin to be provided with at interval several polar axis shafts from true origin O, each polar axis shaft is represented a certain geologic parameter, difference according to each geologic parameter, be provided with different scales on each polar axis shaft, the represented connotation of each scale is determined according to pairing geologic parameter type; 2) with each geologic parameter in described target oil field correspondence markings successively on each polar axis shaft of described geology analogy figure, on each polar axis shaft of described geology analogy figure, obtain some targets oil field gauge point, and the first quartile of each described target oil field gauge point from the XOY coordinate system begun to connect in turn along each polar axis shaft successively, obtain target oil field polygon; 3) according to actual needs, select to treat the analogy oil field with analogy is carried out in described target oil field, and each described each geologic parameter in analogy oil field for the treatment of is marked at respectively on each polar axis shaft of described geology analogy figure, on each polar axis shaft of described geology analogy figure, obtain some analogy oil field gauge points for the treatment of, and the first quartile of each described pairing gauge point for the treatment of the analogy oil field from the XOY coordinate system begun to connect in turn along each polar axis shaft successively, obtain this and treat analogy oil field polygon, and the like, obtain the analogy oil field polygon that remains; 4) with described target oil field and treat that all polygons in analogy oil field are superimposed in described geology analogy figure, each is treated that analogy oil field polygon and target oil field polygonal shape carry out analogy one by one, the preliminary definite and similar oil field of described target field characteristics; 5) each that obtains after the preliminary screening is treated the geologic parameter in analogy oil field and the geologic parameter in target oil field compare, and is carried out postsearch screening according to the criterion of setting, obtain with described target oil field geologic feature similarity degree the highest treat the analogy oil field; 6) according to instructing described target oil field to work out development strategy and development scheme in the analogy oil field with the highest the treating of described target oil field geologic characteristic similarity.
Described step 5) obtains may further comprise the steps in the analogy oil field with the highest the treating of described target oil field geologic feature similarity degree: 1. calculate the qualified area of a polygon for the treatment of the analogy oil field after described target oil field area of a polygon and the preliminary screening at first respectively; 2. calculate the area of a polygon ratio respectively treat analogy oil field and target oil field; 3. each is treated that the analogy oil field calculates the quantitative parameter difference content in its various geology quantitative parameters and target oil field successively; 4. the similarity for the treatment of analogy oil field and target oil field according to the criterion of setting is estimated successively, from respectively treat the analogy oil field, obtain with described target oil field similarity the highest treat the analogy oil field.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is according to the required geologic parameter of using in development goal oil field, make geology analogy figure, the manufacturing process of geology analogy figure is: set up the XOY coordinate system, begin to be provided with at interval several polar axis shafts from true origin O, each polar axis shaft is represented a certain geologic parameter, difference according to each geologic parameter, be provided with different scales on each polar axis shaft, the represented connotation of each scale is determined according to pairing geologic parameter type, the present invention has carried out well-designed to the layout of every coordinate axis, thereby make the analogy content, meaning comes into plain view, the developer can assess target oil field and the existing analogy oil field for the treatment of by geology analogy figure, therefore the present invention instructs the developer to seek the oil field similar to the target oil field with the standardization diagramatic way, method of work is simple, even without the personnel of geology analogue investigation experience also left-hand seat at once, reduce to the influence of " research experience " minimum.2, geologic parameter on the geology analogy figure of the present invention includes qualitative parameter and quantitative parameter, with target oil field and each geologic parameter for the treatment of the analogy oil field correspondence markings successively on each polar axis shaft of geology analogy figure, treat that by each analogy oil field polygon and target oil field polygonal shape are to the target oil field with treat that the analogy oil field carries out primary election, then each that obtains after the 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 and the highest oil field of target oil field geologic feature similarity degree, rich connotation of the present invention, clear layer, the mode that adopts qualitative and quantitative to combine, can be at a high speed, select and the highest oil field of similarity, target oil field efficiently, and according to the highest oil field of target oil field geologic characteristic similarity, instruct the target oil field to work out development strategy and development scheme.The present invention can be widely used in marine sedimentogeneous rock oil field geologic assessment and the oil-field development.
Description of drawings
Fig. 1 is the geology analogy synoptic diagram in the marine sedimentogeneous rock of the present invention oil field, among the figure
Expression target oil field,
Analogy oil field A is treated in expression,
Analogy oil field B is treated in expression,
Analogy oil field C is treated in expression,
Analogy oil field D is treated in expression.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
Marine sedimentogeneous rock oil field geologic appraisal procedure of the present invention may further comprise the steps:
1,, makes a geology analogy figure according to the required geologic parameter of using in development goal oil field.
As shown in Figure 1, set up an XOY coordinate system, according to the required geologic parameter of using in development goal oil field, begin to be provided with at interval several polar axis shafts from true origin O, each polar axis shaft is represented a certain geologic parameter, according to the difference of each geologic parameter, be provided with different scales on each polar axis shaft, the represented connotation of each scale is determined according to pairing geologic parameter type.
Embodiments of the invention are made geology analogy figure according to the required geologic parameter of using in development goal oil field, comprise 10 kinds of geologic parameters among this geology analogy figure, but be not limited thereto, can determine according to actual needs, embodiments of the invention begin to be arranged at intervals with 10 polar axis shafts from true origin O, the geologic parameter that 10 polar axis shafts are represented respectively is: structure, the stratum, deposition, lithology, three grades of geologic reserve, zone thickness, sandstone thickness, the sandy ground ratio, permeability and factor of porosity, with the dotted line among Fig. 1 is the boundary, be positioned at the structure of dotted line one side, the stratum, deposition and lithology are the qualitative parameter in marine sedimentogeneous rock oil field, according to the order in the outside from the true origin to the polar axis shaft, construct the scale that is provided with on the pairing polar axis shaft and represent respectively: rift, down warping region and foreland; The scale that is provided with on the pairing polar axis shaft in stratum is represented respectively: the preceding tertiary system, Paleogene System and Neogene System; Depositing the scale that is provided with on the pairing polar axis shaft represents respectively: braided stream, meandering river, shallow water delta, delta, fan dalta, fan and basin floor fan under water; The scale that is provided with on the pairing polar axis shaft of lithology is represented respectively: petroclastic rock, carbonatite, metamorphosed rock and pyrogenic rock; The three grades of geologic reserve, zone thickness, sandstone thickness, sandy ground ratio, permeability and the factor of porosity that are positioned at the dotted line opposite side are the quantitative parameter of marine sedimentogeneous rock, and wherein, the unit of the scale that is provided with on the polar axis shaft of three grades of geologic reserve correspondences is all places (* 10
4m
3), be followed successively by: 3000,5000,7000 and 9000; The unit of the scale that is provided with on the polar axis shaft of zone thickness correspondence is followed successively by: 100,300,500 and 700 for rice (m); The unit of the scale that is provided with on the polar axis shaft of sandstone thickness correspondence is followed successively by: 50,150,250 and 350 for rice (m); Sandy ground is percentage (%) than the unit of the scale that is provided with on the corresponding polar axis shaft, is followed successively by: 10,25,40 and 55; The unit of the scale that is provided with on the polar axis shaft of permeability correspondence is millidarcy (mD), is followed successively by: 10,100,1000 and 10000; The unit of the scale that is provided with on the polar axis shaft of factor of porosity correspondence is percentage (%), is followed successively by: 10,20,30 and 40.
2, with each geologic parameter in target oil field correspondence markings successively on each polar axis shaft of geology analogy figure, on each polar axis shaft of geology analogy figure, obtain some targets oil field gauge point this moment, then the first quartile of each target oil field gauge point from the XOY coordinate system begun to connect in turn along each polar axis shaft successively, obtain target oil field polygon.
3, according to actual needs, select with the target oil field carry out analogy existing developed treat the analogy oil field, and each is treated that each geologic parameter in analogy oil field is marked at respectively on each polar axis shaft of geology analogy figure, on each polar axis shaft of geology analogy figure, obtain some analogy oil field gauge points for the treatment of this moment, then each is treated that the pairing gauge point in analogy oil field begins to connect in turn along each polar axis shaft successively from the first quartile of XOY coordinate system, obtain this and treat analogy oil field polygon, and the like, obtain the analogy oil field polygon that remains.
4, with the target oil field with treat that all polygons in analogy oil field are superimposed in geology analogy figure, then each is treated that analogy oil field polygon and target oil field polygonal shape carry out analogy, preliminary definite oil field similar to the target field characteristics, detailed process is: if a certain analogy oil field and the target oil field for the treatment of has the qualitative parameter more than 3 consistent, the quantitative parameter scope more than 4 is near determining tentatively that then this treats that the analogy oil field is similar to the target oil field.In the embodiments of the invention, the oil field similar to the 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 that obtains after the 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 and the highest oil field of target oil field geologic feature similarity degree, detailed process is:
1) calculate the qualified area of a polygon for the treatment of the analogy oil field after target oil field area of a polygon and the preliminary screening at first respectively, the area of a polygon of required calculating comprises in the embodiment of the invention: 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) calculate the area of a polygon ratio respectively treat analogy oil field and target oil field successively:
In the formula, S represents target oil field area of a polygon, S
iAnalogy oil field area is treated in expression, and i=1 represents to treat analogy oil field A, and i=2 represents to treat analogy oil field B, and i=3 represents to treat analogy oil field C, and i=4 represents to treat analogy oil field D, K in the embodiments of the invention
iResult of calculation as shown in table 1:
Table 1
| The 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 the analogy oil field calculates the quantitative parameter difference content in its various quantitative parameters and target oil field successively:
In the formula, X
nThe pairing geologic parameter in expression target oil field, wherein X
1Represent three grades of ground indicated reserves c2s, X
2The expression zone thickness, X
3The expression sandstone thickness, X
4Expression sandy ground ratio, X
5The expression permeability, X
6The expression factor of porosity, j represents respectively respectively to treat the analogy oil field, in the embodiment of the invention for treating analogy oil field A, treat analogy oil field B, treat analogy oil field C and treat analogy oil field D, for example: X
11Three grades of ground indicated reserves c2s, the X of analogy oil field A treated in expression
12The zone thickness of analogy oil field A, X are treated in expression
13The sandstone thickness of analogy oil field A, X are treated in expression
14Sandy ground ratio, the X of analogy oil field A treated in expression
15The permeability of analogy oil field A, X are treated in expression
16Expression treats the factor of porosity of analogy oil field A, and the quantitative parameter that other treats the analogy oil field does not repeat them here, and the quantitative parameter difference content in each oil field of embodiments of the invention is as shown in table 2:
Table 2
4) similarity for the treatment of analogy oil field and target oil field according to the criterion of setting is estimated once more, from treat the analogy oil field, obtain and the highest oil field of similarity, target oil field, detailed process: show that according to a plurality of oil fields, basin, Bohai Sea Gulf statistics each treats analogy oil field K according to table 3
iValue is estimated in medium above and 6 quantitative parameters of similarity degree to be had more than 3
Value to reach similarity degree medium, promptly as and the high oil field of similarity, target oil field, if obtain more than one and the high oil field of similarity, target oil field, then preferred K
iValue approaches 1 oil field most as final and the highest oil field of similarity, target oil field, and the parameter evaluation standard that embodiments of the invention set is as shown in table 3:
Table 3
6, according to target oil field geologic characteristic similarity the highest treat the analogy oil field, be used for development strategy and development scheme are worked out in the target oil field, that is: used well number, well type, well location and well pattern pattern etc. can be with reference to designing with the highest analogy oil field for the treatment of of its similarity when the target oil field produced in the future, can estimate simultaneously the target oil field in the future oil gas production capacity and output, assess its economy.
The various embodiments described above only are used to illustrate the present invention, and wherein each step of implementing of method etc. 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 got rid of outside protection scope of the present invention.
Claims (2)
1. marine sedimentogeneous rock oil field geologic appraisal procedure, it may further comprise the steps:
1) according to the required geologic parameter of using in development goal oil field, make a geology analogy figure, the manufacturing process of described geology analogy figure is: set up an XOY coordinate system, begin to be provided with at interval several polar axis shafts from true origin O, each polar axis shaft is represented a certain geologic parameter, according to the difference of each geologic parameter, be provided with different scales on each polar axis shaft, the represented connotation of each scale is determined according to pairing geologic parameter type;
2) with each geologic parameter in described target oil field correspondence markings successively on each polar axis shaft of described geology analogy figure, on each polar axis shaft of described geology analogy figure, obtain some targets oil field gauge point, and the first quartile of each described target oil field gauge point from the XOY coordinate system begun to connect in turn along each polar axis shaft successively, obtain target oil field polygon;
3) according to actual needs, select to treat the analogy oil field with analogy is carried out in described target oil field, and each described each geologic parameter in analogy oil field for the treatment of is marked at respectively on each polar axis shaft of described geology analogy figure, on each polar axis shaft of described geology analogy figure, obtain some analogy oil field gauge points for the treatment of, and the first quartile of each described pairing gauge point for the treatment of the analogy oil field from the XOY coordinate system begun to connect in turn along each polar axis shaft successively, obtain this and treat analogy oil field polygon, and the like, obtain the analogy oil field polygon that remains;
4) with described target oil field and treat that all polygons in analogy oil field are superimposed in described geology analogy figure, each is treated that analogy oil field polygon and target oil field polygonal shape carry out analogy one by one, the preliminary definite and similar oil field of described target field characteristics;
5) each that obtains after the preliminary screening is treated the geologic parameter in analogy oil field and the geologic parameter in target oil field compare, and is carried out postsearch screening according to the criterion of setting, obtain with described target oil field geologic feature similarity degree the highest treat the analogy oil field;
6) according to instructing described target oil field to work out development strategy and development scheme in the analogy oil field with the highest the treating of described target oil field geologic characteristic similarity.
2. a kind of marine sedimentogeneous rock oil field geologic appraisal procedure as claimed in claim 1 is characterized in that: described step 5) obtains may further comprise the steps in the analogy oil field with the highest the treating of described target oil field geologic feature similarity degree:
1. calculate the qualified area of a polygon for the treatment of the analogy oil field after described target oil field area of a polygon and the preliminary screening at first respectively;
2. calculate the area of a polygon ratio respectively treat analogy oil field and target oil field;
3. each is treated that the analogy oil field calculates the quantitative parameter difference content in its various geology quantitative parameters and target oil field successively;
4. the similarity for the treatment of analogy oil field and target oil field according to the criterion of setting is estimated successively, from respectively treat the analogy oil field, obtain with described target oil field similarity the highest treat the analogy oil field.
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| CN107133879A (en) * | 2016-02-26 | 2017-09-05 | 中国石油化工股份有限公司 | A kind of method for screening similar oil field |
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| CN109594979A (en) * | 2018-11-15 | 2019-04-09 | 中国海洋石油集团有限公司 | Shunting sand dam inner clamps layer parameter calculation method based on well track |
| 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 |
| CN113095681A (en) * | 2021-04-13 | 2021-07-09 | 中国煤炭地质总局勘查研究总院 | Mining exploration and development area evaluation method and device |
| CN113095681B (en) * | 2021-04-13 | 2024-05-14 | 中国煤炭地质总局勘查研究总院 | Mining investigation and development area evaluation method and device |
| 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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