CN115481829A - Method for evaluating uniformity degree of vertical well pattern of oil field - Google Patents
Method for evaluating uniformity degree of vertical well pattern of oil field Download PDFInfo
- Publication number
- CN115481829A CN115481829A CN202110597741.2A CN202110597741A CN115481829A CN 115481829 A CN115481829 A CN 115481829A CN 202110597741 A CN202110597741 A CN 202110597741A CN 115481829 A CN115481829 A CN 115481829A
- Authority
- CN
- China
- Prior art keywords
- well
- oil
- uniformity
- calculating
- well pattern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
- G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Human Resources & Organizations (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Data Mining & Analysis (AREA)
- Economics (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Operations Research (AREA)
- Strategic Management (AREA)
- Pure & Applied Mathematics (AREA)
- Entrepreneurship & Innovation (AREA)
- Mathematical Physics (AREA)
- Educational Administration (AREA)
- Development Economics (AREA)
- Bioinformatics & Computational Biology (AREA)
- Algebra (AREA)
- Evolutionary Biology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Software Systems (AREA)
- Databases & Information Systems (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Game Theory and Decision Science (AREA)
- Probability & Statistics with Applications (AREA)
- Marketing (AREA)
- Quality & Reliability (AREA)
- Tourism & Hospitality (AREA)
- General Business, Economics & Management (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention relates to the field of oil reservoir development, and belongs to an oil field vertical well pattern uniformity degree evaluation method. The evaluation method comprises the following steps: the method comprises the following steps of (1) acquiring earth coordinates, well types, perforation positions and perforation time of all oil-water wells in a target work area; step (2), dividing the oil-water wells in the work area into different well groups by taking the water wells as centers according to the oil-water wells; step (3), calculating the injection-production well spacing and the average well spacing of each oil well communicated with the water wells in each well group according to the perforation condition of the oil-water wells; step (4), calculating various area parameters and angle parameters; step (5), calculating the well spacing uniformity coefficient L V Distribution coefficient N of well pattern V (ii) a Step (6), calculating the well spacing uniformity coefficient L of all well groups according to the method V Well pattern distribution coefficient N V (ii) a And (7) comprehensively determining the uniformity of the well pattern. The invention can evaluate the uniformity of the vertical well pattern of the oil field, has guiding function to the establishment of the oil field development scheme,can improve the rationality of the well arrangement scheme, keep the efficient development of the oil field and have great application value.
Description
Technical Field
The invention relates to the field of oil reservoir development, and particularly belongs to a method for evaluating the uniformity degree of a vertical well pattern of an oil field in well pattern adaptability research.
Background
The quality of the developed well pattern directly determines the oil field development effect to a great extent, and the well pattern uniformity degree is always an important index for evaluating the well pattern adaptability, but an evaluation method is lacked. Vertical wells are the most common well type in oilfield development. At present, most of oil fields in China enter a high water cut period or even an extra high water cut period, well patterns are complex, and the phenomenon of uneven well patterns is serious. The uneven well pattern is mainly embodied in two aspects, namely the uneven well spacing, namely the unequal injection and production well spacing of each oil well communicated with the water well. The field practice shows that under the condition of uneven well spacing, injected water is easy to rush in the direction of small well spacing with small seepage resistance, so that inefficient invalid circulation is caused, and the development effect is influenced. And secondly, the well pattern is unevenly distributed, namely, the oil wells are intensively distributed in a certain direction around the water well, and even if the injection and production well distances are equal, the well pattern is not even.
If the oil-water well is unevenly distributed on the plane, the displacement is uneven, the swept volume is reduced, and the recovery ratio is influenced. Some documents research the influence of uneven well spacing on development effect, and mostly find that the water injection effect of a single well group is macroscopically researched in dynamic analysis, but the condition of uneven well pattern distribution is not researched, and a method for accurately, systematically and comprehensively evaluating the uniformity degree of the well pattern is not provided.
Disclosure of Invention
In order to solve the problems, the invention provides an evaluation method for the uniformity degree of a vertical well pattern of an oil field; the well pattern uniformity of the vertical well in the oil field can be evaluated, the plane interference degree caused by the non-uniform well pattern can be judged, the well pattern layout method has a guiding effect on the establishment of an oil field development scheme, the rationality of the well layout scheme can be improved, and the efficient development of the oil field can be kept.
The invention realizes the aim by the following technical scheme:
a method for evaluating the uniformity degree of a vertical well pattern of an oil field comprises the following steps:
the method comprises the following steps of (1) acquiring earth coordinates, well types, perforation positions and perforation time of all oil-water wells in a target work area;
step (2), dividing the oil-water wells in the work area into different well groups by taking the water wells as centers according to the oil-water wells;
step (3), calculating the injection-production well spacing and the average well spacing of each oil well communicated with the water wells in each well group according to the perforation condition of the oil-water wells;
step (4), calculating various area parameters and angle parameters;
step (5), calculating the well spacing uniformity coefficient L V Distribution coefficient N of well pattern V ；
Step (6), calculating the well spacing uniformity coefficient L of all well groups according to the method V Well pattern distribution coefficient N V First, L is V And N V Normalizing, and determining well spacing uniformity coefficient L of each well group according to the actual condition of the work area V Well pattern distribution coefficient N V Calculating the weight to obtain the well pattern uniformity of each well group;
step (7), calculating the average value of the well pattern uniformity of each well group of each oil layer to obtain the well pattern uniformity of different oil layers; and integrating the uniformity of the well pattern of each oil layer to determine the uniformity of the well pattern of the work area.
Further, the step 4 of calculating the area parameters and the angle parameters includes:
step (1), connecting oil wells O1, O2, O3 and O4 … … in a well group in sequence to form a polygon S1, and calculating the area of the polygon S1;
connecting a line from the water well to each oil well, and marking a virtual well A, B, C, D … … at the position of the average well spacing on the connecting line or the connecting line extension line; sequentially connecting the virtual wells A, B, C, D … … to form a polygon S2, and calculating the area of the polygon S2;
step (3) of calculating the sum A3 of the areas within S1 and outside S2
Step (4), calculating the sum A4 of the areas outside the S1 and inside the S2;
and (5) calculating an included angle between a water well and an oil well connecting line, namely the included angle 1, the included angle 2, the included angle 3 and the included angle 4 … ….
Further, the step 5 calculates the well spacing uniformity coefficient L V Distribution coefficient N of well pattern V Comprises the following steps:
L V =( A3+ A4)/A1
N V =∠max/∠min
wherein A1 is the area of oil well points O1, O2, O3, O4 … … connecting with a coil;
a2 is the area of a polygon S2 defined by the virtual wells A, B, C, D … … and the lines determined by the average well spacing;
a3 is the sum of the areas inside S1 and outside S2;
a4 is the sum of the areas outside S1 and inside S2;
the angle max is the maximum value of angle 1, angle 2, angle 3, angle 4 … …;
angle min is the minimum value of angle 1, angle 2, angle 3, and angle 4 … ….
Further, the larger the well spacing uniformity coefficient is, the more uneven the well spacing is, and the well spacing uniformity coefficient of the uniform well pattern is 0.
Further, the larger the well pattern distribution coefficient is, the more uneven the well pattern distribution is, and the well pattern distribution coefficient of the uniform well pattern is 0.
Further, the calculation of the well spacing uniformity coefficient and the well pattern distribution coefficient may be, but is not limited to, a formation unit such as a sandstone group, a single sand layer, and the like.
Further, the calculated is the well pattern uniformity degree of a single time node; the well pattern uniformity degree calculation methods at different time points are the same.
The invention has the beneficial effects that:
the method for evaluating the uniformity of the vertical well pattern can calculate the uniformity of the well spacing and the distribution of the well pattern of the vertical well pattern system of the oil field, and evaluate the non-uniformity of the plane of the well pattern, thereby judging the plane interference degree caused by the non-uniformity of the well pattern, having great application value for the establishment of an adjustment scheme and the evaluation of the adaptability of the well pattern, and improving the development effect of the oil field.
Drawings
FIG. 1 is a process for evaluating the uniformity of a vertical well pattern according to the present invention;
FIG. 2 is a schematic diagram of a well pattern distribution coefficient according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a well pattern uniformity calculation according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating evaluation of well pattern uniformity in layered and time-divided periods according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the evaluation result of the uniformity of a well pattern in a certain work area according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The implementation of the invention provides an evaluation method for the uniformity degree of a vertical well pattern of an oil field, which comprises the following steps:
acquiring geodetic coordinates, well types, perforation positions and perforation time of all oil-water wells in a target work area;
step (2), dividing the oil-water wells in the work area into different well groups by taking the water wells as centers according to the oil-water wells;
step (3), calculating the injection-production well spacing and the average well spacing of each oil well communicated with the water wells in each well group according to the perforation condition of the oil-water wells;
step (4), calculating various area parameters and angle parameters;
step (5), calculating the well spacing uniformity coefficient L V Distribution coefficient N of well pattern V ；
Step (6), calculating the well spacing uniformity coefficient L of all well groups according to the method V Well pattern distribution coefficient N V First, L is V And N V Normalizing, and determining well spacing uniformity coefficient L of each well group according to the actual condition of the work area V Well pattern distribution coefficient N V Calculating the weight to obtain the well pattern uniformity of each well group;
step (7), calculating the average value of the well pattern uniformity of each well group of each oil layer to obtain the well pattern uniformity of different oil layers; and (4) integrating the uniformity of the well patterns of all oil layers and determining the uniformity of the well patterns of the work area.
Further, the step 4 of calculating the area parameters and the angle parameters includes:
step (1), connecting oil wells O1, O2, O3 and O4 … … in a well group in sequence to form a polygon S1, and calculating the area of the polygon S1;
connecting a line from the water well to each oil well, and marking a virtual well A, B, C, D … … at the position of the average well spacing on the connecting line or the connecting line extension line; sequentially connecting the virtual wells A, B, C, D … … to form a polygon S2, and calculating the area of the polygon S2;
step (3) of calculating the sum A3 of the areas inside S1 and outside S2
Step (4), calculating the sum A4 of the areas outside the S1 and inside the S2;
and (5) calculating an included angle between a water well and an oil well connecting line, which is angle 1, angle 2, angle 3 and angle 4 … ….
Further, the step 5 calculates the well spacing uniformity coefficient L V Distribution coefficient N of well pattern V Comprises the following steps:
L V =( A3+ A4)/A1
N V =∠max/∠min
wherein A1 is the area of oil well points O1, O2, O3, O4 … … connecting with a coil;
a2 is the area of a polygon S2 defined by the virtual wells A, B, C, D … … and the lines determined by the average well spacing;
a3 is the sum of the areas inside S1 and outside S2;
a4 is the sum of the areas outside S1 and inside S2;
the angle max is the maximum value of angle 1, angle 2, angle 3, angle 4 … …;
angle min is the minimum value of angle 1, angle 2, angle 3, and angle 4 … ….
Further, the larger the well spacing uniformity coefficient is, the more uneven the well spacing is, and the well spacing uniformity coefficient of the uniform well pattern is 0.
Further, the larger the well pattern distribution coefficient is, the more uneven the well pattern distribution is, and the well pattern distribution coefficient of the uniform well pattern is 0.
Further, the calculation of the well spacing uniformity coefficient and the well pattern distribution coefficient may be, but is not limited to, a stratum unit such as a sandstone group, a single sand layer, or the like.
Further, the calculated is the well pattern uniformity degree of a single time node; the well pattern uniformity degree calculation methods at different time points are the same.
The specific application of the vertical well pattern uniformity evaluation process of the invention is described in detail by specific embodiments with reference to the accompanying drawings, and the specific process is as follows:
FIG. 1 is a flow chart of well pattern uniformity evaluation for vertical wells, which is based on earth coordinates of oil-water wells, perforation positions and perforation time, determines the plane position of the oil-water wells, divides the wells into different well groups by taking the wells as the center, calculates the well spacing uniformity coefficients and well pattern distribution coefficients of different oil layers, different time nodes and different well groups, and comprehensively evaluates the well pattern uniformity degrees of different oil layers and different time nodes after normalization respectively;
FIG. 2 is a schematic diagram of well pattern distribution coefficients, which illustrates a specific example, in which a water well is located at the center, oil wells are respectively located on circles with the water well as the center of the circle, and the injection and production well distances are the same. Because the oil wells are not uniformly distributed in all directions on the plane, the well pattern distribution is not uniform even if the injection and production well spacing is the same. The size of the angle 1, the angle 2, the angle 3 and the angle 4 reflects whether the distribution of the oil well around the water well is uniform; in the graph 2, the angle 1, the angle 2, the angle 3 and the angle 4 are respectively 137 degrees, 26 degrees, 40 degrees and 157 degrees, and the well pattern distribution coefficient is 6.04 which is larger and uneven;
FIG. 3 is a schematic diagram of well pattern uniformity calculation, wherein the area of a polygon S1 defined by connecting the oil wells O1, O2, O3 and O4 is A1; the area of a virtual well A, B, C, D determined by the average well spacing and a polygon S2 defined by the connection lines is A2; the sum of the areas within S1 and outside S2 is A3; the sum of the areas outside S1 and inside S2 is A4; calculating the well spacing uniformity coefficient according to A1, A2, A3 and A4; in FIG. 3, it can be calculated that A1 is 352m2, A3 is 32 m2, and A4 is 126 m2, so the well spacing uniformity coefficient is 0.45, and the well spacing is relatively non-uniform;
connecting lines from a water well to an oil well, wherein included angles of 1, 2, 3 and 4 exist among the connecting lines, and well pattern distribution coefficients are determined according to the ratio of the maximum value to the minimum value of the included angles;
FIG. 4 is a schematic diagram of evaluation of well pattern uniformity at layered time points, and well pattern uniformity coefficients and well pattern distribution coefficients of different oil layers, different time nodes and different well groups can be calculated according to a well pattern uniformity coefficient and well pattern distribution coefficient calculation method;
fig. 5 is a schematic diagram of the evaluation result of the uniformity of the well patterns in a certain work area, and from the evaluation result of the uniformity of the well patterns in each oil layer in a certain work area, the well patterns in each oil layer are relatively non-uniform, and the differences of the uniformity of the well patterns among the oil layers are relatively large.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the scope of protection thereof, and although the present application is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: after reading this application, those skilled in the art may still make various changes, modifications and equivalents to the specific embodiments of the application, but all other embodiments that may be obtained without inventive faculty will fall within the scope of the invention.
Claims (7)
1. A method for evaluating the uniformity degree of a vertical well pattern of an oil field is characterized by comprising the following steps: the method comprises the steps of inputting a target area well position coordinate, single well layering data and perforation data, and evaluating the well pattern uniformity degree by calculating a well spacing uniformity coefficient and a well pattern distribution coefficient in layering and time-sharing periods; the method comprises the following steps:
the method comprises the following steps of (1) acquiring earth coordinates, well types, perforation positions and perforation time of all oil-water wells in a target work area;
step (2), dividing the oil-water wells in the work area into different well groups by taking the water wells as centers according to the oil-water wells;
step (3), calculating the injection-production well spacing and the average well spacing of each oil well communicated with the water wells in each well group according to the perforation condition of the oil-water wells;
step (4), calculating various area parameters and angle parameters;
step (5), calculating the well spacing uniformity coefficient L V Distribution coefficient N of well pattern V ；
Step (6), calculating the well spacing uniformity coefficient L of all well groups according to the method V Well pattern distribution coefficient N V First, L is V And N V Normalizing, and determining well spacing uniformity coefficient L of each well group according to the actual condition of the work area V Well pattern distribution coefficient N V Calculating the weight to obtain the uniformity of each well pattern;
step (7), calculating the average value of the well pattern uniformity of each well group of each oil layer to obtain the well pattern uniformity of different oil layers; and (4) integrating the uniformity of the well patterns of all oil layers and determining the uniformity of the well patterns of the work area.
2. The method for evaluating the uniformity degree of the vertical well pattern of the oil field as claimed in claim 1, which is characterized in that: the step 4 of calculating the area parameters and the angle parameters comprises the following steps:
step (1), connecting oil wells O1, O2, O3 and O4 … … in a well group in sequence to form a polygon S1, and calculating the area of the polygon S1;
connecting a line from the water well to each oil well, and marking a virtual well A, B, C, D … … at the position of the average well spacing on the connecting line or the connecting line extension line; sequentially connecting the virtual wells A, B, C, D … … to form a polygon S2, and calculating the area of the polygon S2;
step (3) of calculating the sum A3 of the areas inside S1 and outside S2
Step (4), calculating the sum A4 of the areas outside the S1 and inside the S2;
and (5) calculating an included angle between a water well and an oil well connecting line, which is angle 1, angle 2, angle 3 and angle 4 … ….
3. The method for evaluating the uniformity degree of the vertical well pattern of the oil field as claimed in claim 1, which is characterized in that: step 5 is to calculate the well spacing uniformity coefficient L V Distribution coefficient N of well pattern V Comprises the following steps:
L V =( A3+ A4)/A1
N V =∠max/∠min
wherein A1 is the area of oil well points O1, O2, O3, O4 … … connecting with a coil;
a2 is the area of a polygon S2 defined by the virtual wells A, B, C, D … … and the lines determined by the average well spacing;
a3 is the sum of the areas inside S1 and outside S2;
a4 is the sum of the areas outside S1 and inside S2;
the max is the maximum value of the sum of × 1, × 2, × 3, × 4 … …;
the angle min is the minimum value of the angles 1, 2, 3, 4 … ….
4. The method for evaluating the uniformity degree of the vertical well pattern of the oil field as claimed in claim 1, which is characterized in that: the larger the well spacing uniformity coefficient is, the more uneven the well spacing is, and the well spacing uniformity coefficient of the uniform well pattern is 0.
5. The method for evaluating the uniformity degree of the vertical well pattern of the oil field as claimed in claim 1, which is characterized in that: the larger the well pattern distribution coefficient is, the more uneven the well pattern distribution is, and the well pattern distribution coefficient of the uniform well pattern is 0.
6. The method for evaluating the uniformity degree of the vertical well pattern of the oil field as claimed in claim 1, which is characterized in that: the calculation of the well spacing uniformity coefficient and the well pattern distribution coefficient can be, but is not limited to, formation units such as sandstone groups and single sand layers.
7. The method for evaluating the uniformity degree of the vertical well pattern of the oil field as claimed in claim 1, which is characterized in that: the calculated is the well pattern uniformity degree of a single time node; the well pattern uniformity degree calculation methods at different time points are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110597741.2A CN115481829A (en) | 2021-05-31 | 2021-05-31 | Method for evaluating uniformity degree of vertical well pattern of oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110597741.2A CN115481829A (en) | 2021-05-31 | 2021-05-31 | Method for evaluating uniformity degree of vertical well pattern of oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115481829A true CN115481829A (en) | 2022-12-16 |
Family
ID=84419203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110597741.2A Pending CN115481829A (en) | 2021-05-31 | 2021-05-31 | Method for evaluating uniformity degree of vertical well pattern of oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115481829A (en) |
-
2021
- 2021-05-31 CN CN202110597741.2A patent/CN115481829A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2009264967B2 (en) | Well log correlation | |
| CN105651676B (en) | A kind of reservoir heterogeneity characterizing method under horizontal well rule well pattern | |
| CN111173507B (en) | High-water-cut oil field residual oil prediction method | |
| US10387583B2 (en) | Rotations from gradient directions | |
| CN103437381B (en) | Clump of piles traction superposition settling amount evaluation process method | |
| CN109255834A (en) | Deposit three-dimensional oil in place evaluation method | |
| CN103995972A (en) | Stratigraphic correlation method | |
| CN115481829A (en) | Method for evaluating uniformity degree of vertical well pattern of oil field | |
| CN111622733A (en) | Method for deploying encrypted well in dense gas reservoir area | |
| Lu et al. | Identifying flow units by FA-assisted SSOM—An example from the Eocene basin-floor-fan turbidite reservoirs in the Daluhu Oilfield, Dongying Depression, Bohai Bay Basin, China | |
| CN109991663B (en) | Work area seismic velocity body correction method and device | |
| He et al. | Numerical calculation of equivalent cell permeability tensors for general quadrilateral control volumes | |
| CN107894614B (en) | Two-dimensional surface layer model construction method and method for obtaining two-dimensional measuring line control points | |
| CN113409463B (en) | Three-dimensional geological model construction method and device including pinch-out treatment | |
| CN112419493B (en) | Shale reservoir three-dimensional attribute model building method and device | |
| CN111894567A (en) | Water saturation measuring method suitable for tight sandstone reservoir | |
| CN1278134C (en) | Induction logging | |
| CN109973068B (en) | Method and device for identifying oil reservoir water injection induced cracks | |
| REN et al. | Geomodeling technology under multifactor control | |
| CN113361111A (en) | Partitioning method of low-permeability reservoir characteristic model | |
| CN110630245B (en) | Single-well oil drainage area quantitative calculation method based on permeability advantage channel | |
| CN204241700U (en) | Complicated basin edge surpasses the recognition system on stripping band subtle trap border | |
| CN114046145B (en) | Reservoir fluid identification and saturation determination method and device | |
| CN113538670B (en) | Integral fracturing well distribution method for river sediment type tight gas reservoir and electronic equipment | |
| CN117709108B (en) | Model building method for oil layer porosity of grape-flowered oil field Fuyu |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |