SY/T 5366-2000 Technical requirements for coring data of oilfield development wells
Some standard content:
ICS 75.1B0.99
Registration No.: 6967--2000
Petroleum and Natural Gas Industry Standard of the People's Republic of ChinaSY/T 53662000
Technological requirement of coring data of development wells200H 03 - 31 Issued
State Administration of Petroleum and Chemical Industry
2000-10-01Implementation
SY/T 5366-—2000
Cited by Standard
Requirements for on-site coring data
4 Core description
5 Indoor core analysis and related data
6 Special coring technical requirements
7 Coring summary
Appendix A (Standard Appendix)
Appendix B (Suggested Appendix)
Core measurement and numbering
Format of coring data for development wells.
SY/T 5366—2000
Core data is the most important first-hand data for understanding the lithology, physical properties, occurrence, flooding status, remaining oil distribution, etc. of oil layers. It is the geological basis for formulating oilfield development plans and adjusting and tapping potential. Therefore, each oilfield must obtain a large number of cores. The formulation of this standard will help to standardize the collection of core data and better serve oil development. This standard is revised on the basis of SYT5366-89 Technical Requirements for Sealed Coring Data in Sandstone Reservoirs. The revised contents involve the requirements for field data collection, core description, special coring technical requirements, etc., and various commonly used coring methods are combined together. This standard will replace SY/T5366-89 from the time of implementation. Appendix A of this standard is the appendix of the standard. Appendix B of this standard is the appendix of the suggestion. This standard is proposed by the Shanghai Minyao Oil and Gas Group Corporation. This standard is approved by the Oil and Gas Field Development Professional Standardization Committee. The drafting unit of this standard: Daqing Petroleum Administration Bureau Oil Production Plant No. 6. The drafters of this standard are Ji Baofa and Ye Qingquan. This standard was first issued in March 1989, and this version is the 1st revision. 1 Scope
Standard of the Oil and Gas Industry of the People's Republic of China Technical requirements for coring data of development wells
SY/T 5366-20
Replaces SY/T 5366-—89
Technological reguirement of cnring data of development wells This standard specifies the technical requirements for coring data of development wells (including evaluation films). This standard is applicable to the collection of core data such as ordinary coring, large diameter coring, oil-based drilling fluid coring, and closed coring. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are all in effect. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. SY/T 5343—94 Determination of the amount of filtrate intrusion into the coreSYT5368—2000 Rock thin section identification
3 Requirements for coring site data
3.1 Core extraction and measurement
3.1.1 The coring site must be clean and flat. 3.1.2 After the core is pulled out of the ground, the core should be removed immediately, and the drilling fluid or sealing fluid on the core should be removed with a clean scrub (such as cotton yarn, etc.) to prevent the core from being contaminated. Loose sandstone should be preserved by freezing technology. 3.1.3 The order of core extraction should be arranged from bottom to top to ensure that the order of cores is not reversed. 3.1.4 Align the cores, remove false cores, and arrange the polished surface and broken cores in a proper manner. Use a steel tape measure to accurately measure the length of the core and number the cores. For specific methods, see Appendix A (Appendix to the standard). 3.2 Selection of rock samples
3.2.1 The rock samples for coring and sealed coring in oil-based wells must be selected within 1 hour, and the exposure time of the rock samples in the air shall not exceed 0.5 hours. This restriction does not apply to general coring. 3.2.2 The physical property analysis of oil and gas cores is generally based on 8 to 10 samples per meter. For core sections with little change in lithology and oil production, the sampling density can be reduced as appropriate, otherwise the sampling density should be increased. Cores without oil and gas are generally not sampled, but can be selected according to the design if necessary. 3.2.3 Special core analysis such as wettability, relative permeability, capillary pressure curve, sensitivity test, etc. can be selected as needed. The position where the whole core is taken should be marked with a marking plate, and the position, length and lithology of the rock sample from the top should be marked on the marking plate. 3.2.4 The sampled core should be marked with an arrow pointing to the drill bit, and its top and bottom positions should be recorded, and the rock sample number should be marked. 3.2.5 The cores of oil-based drilling non-liquid coring and sealed coring shall be split into two halves according to their diameter in a ratio of 2:1. The larger half shall be used as a sample for saturation analysis, tracer analysis, microscopic observation, etc. The smaller half shall be used for water content observation, core description, illumination indexing, gamma measurement, video recording, etc. The cores of Xitong coring can be split into two halves according to their diameter in a ratio of 1:1. The two halves shall be used for analytical sampling, and the remaining cores shall be sent to the core library for storage. 3.2.6 For oil-based drilling carboxylic coring and sealed coring, 20-30g of square columnar rock samples shall be placed in numbered bags in the center of the larger half of the rock sample, weighed, and placed in a container containing 40ml of extraction liquid to submerge the sample, cover and seal it tightly, and send it to the laboratory for saturation measurement within 72 hours. For sealed coring, 10-15 rock samples shall be taken close to the saturation sample to measure the tracer content. 3.2.7 Take a piece of the large half rock sample for observation under the microscope, and put the rest of the rock sample into a bag and send it to the laboratory for other analysis and testing.
National Petroleum and Chemical Industry Bureau 2000-03-31 Approved 200010-01 for implementation
3.3 Observation of water content in the core
SY/T 5366--2000
3.3.1 When observing with the naked eye, the color, wetness, water droplets, etc. of the core should be observed. 3.3.2 When observing under a microscope, the gloss of the core surface, the degree of oil fullness and distribution, the presence of water film, wetness, and the cleanliness of the particle surface should be observed.
3.3.3 Small drop test: If the water drop immediately penetrates the surface of the fresh core, it is the first level, which can be judged as a water layer (strong water-washed layer); if all the water droplets penetrate within 10 minutes, it is the second level, which can be judged as an oil-bearing water layer (medium water-washed layer); if the water droplets are convex mirror-shaped and the wetting angle is less than or equal to 90 within 10 minutes, it is the third level, which can be judged as a water-bearing layer (weak water-washed layer); if the water droplets are hemispherical within 10 minutes, the wetting angle is greater than 90°, which is the fourth level, which can be judged as an oil layer (woody water-washed layer).
3.4 Fluorescence photography and gamma-ray determinationwww.bzxz.net
3.4.1 Expose the fresh core to ultraviolet light under a fluorescent lamp, and then take a core profile photo. 3.4.2 Place the fresh core in the sun according to the treatment and record it to make a video film. 3.4.3 Carry out gamma ray determination in the order of dirty cores. A. Core description
4.1 Requirements for core description
4.1.1 Core description should be carried out under natural light. It is forbidden to describe under lights. The core section must be fresh and clean. 4.1.2 The core description should be finely divided into sections. The thickness is more than 5cII1. When there are obvious differences in lithology, physical properties, structure, oil-bearing occurrence, etc., they should be described separately.
4.1.3 The focus of the description is the oil and gas layer section. The description content should be detailed, the observation should be detailed, and the description should be accurate and scientific. If it is difficult to describe, a 1:1 sketch can be used.
4.2 Core description content
4.2.1 Lithology naming: Follow the naming method of SY/T5368 for metamorphic rocks, sandstones, igneous rocks, volcaniclastic rocks, and carbonate pans.
Rock colors should be named according to single colors, composite colors, and oil-containing colors, such as brown, yellow-gray, purple-red, and gray-gray colors.
The debris components include mineral debris and rock debris, and the filling components include matrix and cementing components. The jasper structure includes the crushed eyebrow particle structure, cementation type, cementation degree, sorting, etc. 4.2.4
Sedimentary structures mainly describe bedding structures, layer structures, deformation structures, and biogenic structures. In addition, the size, extension direction, inclination, distribution, and filling of the cracks should be described in detail. If necessary, a crack tracing map should be drawn. Sedimentary cycles are described according to positive cycles, reverse cycles, and composite cycles. 4.2.6
Contains include fossils, nodules, closed blocks, and mud gravels. 4.2.73
Contact relationships mainly describe conformity, unconformity, pseudoconformity, and pre-scour, etc. 4.2.8
4.2.9 The oil-bearing occurrence of unwashed oil layers is divided into five levels according to the oil-bearing area of the fresh surface of the core and the degree of oil-bearing saturation (see Table 1). Table 1 Oil-bearing occurrence classification table
Saturated oil
Saturated oil area/core area
>60 ~90
>30~60
Oil-bearing state
Full oil, strong moist feeling, uniform lithology
Combined oil is relatively full, with oil-free patches
Incomplete oil content, distributed in strips, uneven lithology, extremely incomplete oil content, star-shaped or uneven distribution, uneven lithology, sporadic oil content, very fine lithology, very uneven spoon SY/T 53662000
4.2.10 The water-bearing or water-washing condition can be described according to the results of drip test and naked eye observation. 5 Indoor core analysis and related data
5.1 Core analysis data
5.1.1 Conventional core analysis includes porosity, permeability, saturation, carbonate content, clay content, mineral composition, particle size analysis, etc.
5.1.2 Special core analysis includes relative permeability, capillary pressure curve, rock wettability, rock sensitivity, rock compressibility, rock electrical parameters, rock thermal parameters, etc. 5.1.3 Electron microscope scanning, casting thin section, image analysis, CT, nuclear magnetic resonance and other analyses can be performed as needed. 5.2 Other data
5.2.1 Various logging and geophysical ring logging should be carried out as needed to obtain various measurement curves. 5.2.2 The following original record data should be available: a) core sampling records; b) core description records; c) water content observation records; c) drilling tracer measurement records; c) tracer content measurement records in cores; d) core series photography and video recording; d) core gamma ray measurement records.
5.2.3 Each coring well should be counted and filled in the following forms: 1) Core analysis notice;
) Drilling coring data table;
) Sampling statistics table of different oil layer occurrence;
) Heart analysis data table;
e) Comprehensive data table of dewatering water washing conditions.
The format of each form is shown in Appendix B (Reminder Appendix). 6 Special coring technical requirements
r.1 Huiji mud coring
6.1.1 The water content of the drilling fluid is required to be less than 5%, the water loss is zero, and the density is as small as possible (without spraying). 6.1.2 The performance of the oil-based drilling fluid shall be measured every day. If it does not meet the requirements, it must be dealt with in time to ensure the stability of the performance of the oil-based drilling fluid. 6.2 Core sealing
6.2.1 During the coring process, the tracer content in the drilling fluid must meet the requirements and should be measured every day. The measurement method shall be carried out in accordance with the provisions of Y-section 5343.
Generally, the core sealing rate is required to be greater than Ming% or more. (,2.3 After the water saturation degassing calibration, the average oil recovery efficiency of the water washing section can be calculated using the following formula: Eu
Where: ED—average oil recovery efficiency of the water washing section, f: oil recovery efficiency of the first rock sample, f:
SY/T 53662000
hwThe length of the first washed rock sample, m;
The number of washed rock samples.
6.2.4 The degree of water washing can be determined based on the oil recovery efficiency, core observation, water content observation and other data (see Table 2) Table 2 Indicators for judging the degree of water washing
Oil recovery efficiency
Sand hand condition
Dripping level
Observation
Special evidence
Washed
Strong dyeing
Strong grease feeling, rock particles
Surface is not clean, oil film is seen
No wet feeling, bedding surface often
Infiltration
6.3 Large diameter coring
Weak water washing
Glass luster, little water
film, particle surface is not clean
With color feeling, same color
Medium water washing
235% ~< 55%
slightly stained
glass luster, particle surface
relatively clean, water film
wet feeling, large color change, obvious water washing interface
strong water washing
no staining
glass luster, particle surface
very clean, water droplets
strong water astringency,
water droplets between layers, obvious water margin
large diameter coring requires good drilling fluid performance, water loss less than 4mL/30min, low viscosity ( 30s or less), the core diameter is not less than 160mm
6.4 Core recovery rate
Generally, the core recovery rate should reach more than 95%, and the loose sandstone core recovery rate should reach more than 90%. 7 Coring summary
71 The written report should include the following contents:
a) Coring month and coring layer;
b) Geological conditions of the area where the coring well is located;
c) Drilling and coring conditions;
d) Characteristics of oil and gas layers and their understanding;
e) Opinions and suggestions for future work.
Closed coring should add the content of adjacent oil and water wells, oil layer water washing characteristics, development effect evaluation, etc. 7.2 The report shall be accompanied by the following maps:
a) Coring well location relationship diagram;
b) Comprehensive columnar diagram of oil layers in the coring well section;
c) Core sketch map (special geological phenomena). 7.3 The report shall be accompanied by a drilling coring data table, a statistical table of different oil-bearing occurrences, or a core analysis data table. A closed coring well shall also be accompanied by a comprehensive data table of water washing conditions.
A1 Core measurement
SY/T5366—2000
Appendix A
(Standardized Appendix)
Core measurement and numbering
A1.1 When the core is worn and an inclined surface appears, one side of the core is longer and the other side is shorter. In this case, the longer side should be measured as the length of the core: When the core has a convex surface, the edge length of the concave core and the center line length of the convex core should be measured as the length of the core. AI, 2 Correctly judge the residual core and the core. If the drill bit is full of macro core, it means there is no residual core; if the drill bit is not full of core, or the length of the core is obviously less than the footage, and there is no trace of sand stuck on the surface of the core, it means there is residual core. If the core taken out has a small diameter and an irregular shape, and there are honeycomb marks formed by sand injection and pumping or groove marks caused by core extraction, it means there is a core. The residual core should be counted in the core length, and the core length should not be counted in the core length.
A1.3 The rock blocks that collapsed in the upper strata should be removed and not counted in the core length. The length of mudstone expansion should also be removed. When the core is broken, it should be restored according to the lithological characteristics, color, sedimentary structure, and contents of the core, and then measured after restoration. A2 Core numbering
A2.1 The numbered place is first painted with 1 paint, and then the number is written with black water. The paint frame specification is 4m×2.5cm. The numbering content includes: upgrade number, barrel number, total number, number of blocks, and whole meter and half meter marks on the core direction line, that is, write 0.5m, 1.0m1.5m, A2.2 The specific requirements for numbering are as follows:
a) For oil-bearing, gas-bearing cores and complete sandstone, a number should be assigned every 20cm; h) Cores with polished surfaces, which are less than 20cm long, should also be assigned a number: core) Broken oil-bearing, gas-bearing cores and sandstone should be numbered more densely: d) Large sections of mudstone or cores with unchanged optical properties should be assigned a number every 4 to 50cm; e) Special cores, such as fault hornstones, fossil layers, and erosion surfaces, should be numbered: f) When 10, 20, 30 are assigned to each seam, and the beginning and end of this core are assigned, the coring section of this time should be marked. s
SY/T 5366—2000
Appendix B
(Suggested Appendix)
Format of Development Well Coring Data Table
The format of development coring data table is shown in Table B1 to Table 138.Table R1
Core tube:
Section:
Sealing rate:
Rock sample number
Recorder:
Rock sample number
Describer!
Sample number
Observer:
Drilling time:
mFeeding length:
Top of rock sample
Auditor:
x×Oil used×x and core sampling record
1 hour and minute
year and month and day
m2 Core length:
Period:
Sampling end time:
mHarvest rate;
Rock sample length
Table B2××Ikeda×× well core description record rock sample well section
Auditor:
Rock Core description
Date:
Table B3××Runtian××well water content observation recordDrilling depth
Reviewer:
Rock sample length
Core element
Day time minute
Abrasion condition
Bedding structureDrip levelSettlement testObservation under microscopeSpecial core color
Sample delivery unit:
Drilling team
Setting camp
Man depth
Table maker
Drilling date
Artificial well bottom
Serving core section
ST 5366-2000
×× oil field ×× well core analysis notice including
10-3μm%
Sample submitter:
Coring date
Cement return height
Core order
Permeability curve
Sample submission date:
×× oil field ×× well drilling coring data sheet completion date
Drilling fluid
Coring footage
Completion drilling sealing depth
Core length
Reviewer:
Surface thinning
Core filling altitude
Harvest rate
Date:
Drilling fluid without bubbles
Oil and gas layer time
Number of joint sample blocks
Number of airtight fast
Casing filling distance
Casing rock
Casing point diameter
Casing wall thickness
Slow closure rate
Sampling length
Percentage of total sampling thickness
Statistician:
Table maker:
SYT 5366--2000
× oil day ×× does not include oil-bearing occurrence statistics
Reviewer:
Date:
×× oilfield ×× well core analysis data table salary
10-μm?
Reviewer:
Date:
Full water level
Gap indicating agent content
Fluoride salt content
Median particle size| |tt||Sorting coefficient
Heterochromaticity difference
Total moisture content
Oil content
Moisture content
Oil content "underground ~
Oil content [ground]
Moisture content
Oil content
Air permeability
Water wash thickness white fraction
Tuyaur
SY/F 5366-200
Ya pull code
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