SY/T 10022.1-2000 Offshore oil well cementing design specification Part 1: Cement slurry design and testing

SY/T 10022.1-2000 Offshore oil well cementing design specification Part 1: Cement slurry design and testing SY/T10022.1-2000 Standard download decompression password: www.bzxz.net

iCS75.020
Registration No.: 7580-2000
People's Republic of China Offshore Oil and Gas Industry StandardSY/T 10022.1—2001
Specification for Cementing Design of Offshore Oil wellUnit 1 : Cement slurry design and test2000-09-21Release
State-owned Shantou Chemical Industry Bureau
2001-02-01Implementation
SY/T 10022.1-2001
Policy statement
1 Standard
Cited standards
4 Determination of cement slurry performance test conditions
5 Cement slurry performance test method
6 Requirements for cement slurry performance in cementing operations? Performance of cement slurry for squeezing residual plugging
8 Cement plug for side drilling
Weak volume A (Appendix to the standard) Preparation of large batches of cement slurry
Appendix B (Appendix to the standard)
Calibration methods for thermocouples, temperature measurement systems and control systems (Appendix to the standard)
Appendix plus the standard)
API water loss test report format).*
Cement slurry free liquid test report (format)
Except volume E (Appendix to the standard)
Economic cement simulation test
SY/T 10022.1—2001
This standard is specially formulated to adapt to the characteristics of offshore oil drilling in my country, improve the quality of offshore cementing, and standardize the design and test of cement slurry:
This standard partially quotes some provisions in GB/T16783-1997 "Field Test Procedure for Water-Based Drilling Fluids", SY/T5480-92 "Rheological Design of Cementing", and SY/T5546-92 "Test Method for Application Performance of Oil Well Cement", and is compiled in combination with the experience of offshore drilling operations over the years and the latest research results in China: This standard was issued on September 21, 2000 and will be implemented on February 1, 2001: Appendix A, Appendix B, Appendix C, Appendix I, and Appendix VII of this standard are all appendices of the standard: This standard is proposed and managed by China National Offshore Oil Corporation. Drafting unit of this standard: China National Offshore Oil Corporation Technical Service Company: The main drafter of this standard: Li Banghe.
The chief examiner of this standard is Tan Shuren.
SY/T 10022.1—2001
Policy Statement
Offshore oil and gas industry standard publications are only for general issues. When it comes to specific situations, national and local laws and regulations should be consulted
Offshore oil and gas industry standard publications do not undertake to provide users, manufacturers or suppliers with advance notice and training on health, safety and hazard prevention for their employees and other on-site operators, nor do they assume any responsibility under national and local laws and regulations: The content of any offshore natural gas industry standard publication cannot be interpreted by implication or other means as granting any right to manufacture, sell or use any method, equipment or product involving patent rights, nor does it assume any responsibility for any person who infringes on patent rights! Generally, offshore natural gas industry standards are reviewed, revised, re-identified or revoked at least every five years. Sometimes, this review cycle can be extended by one year, and no more than two years at most. Therefore, the validity period of the publication shall not exceed five years from the date of publication, unless the validity period is extended by authorization. The publication information can be obtained from the Secretariat of the Technical Committee for Standardization of Offshore Oil and Gas Industry (Tel. 010-84522236. The mailing address is Standardization Office, Development and Design Institute, CNOOC Research Center, Box 235, Beijing, 101149) or the Technical Committee for Standardization of Offshore Oil and Gas Industry (Tel. 010-84522673. The mailing address is Science and Technology Office of Offshore Shishan General Company, 25th Floor, Dongjing Xinren Building, Sanerqiao, Beijing, 1027). The purpose of publishing offshore oil and gas industry standards is to promote proven and good engineering techniques and operating practices. It is not intended to eliminate the need to make correct judgments on when and where to apply these techniques and practices. The formulation and publication of offshore Shichi gas industry standards are not intended to restrict anyone from adopting any other techniques and practices in any way. This standard is available for use by anyone who wishes to adopt it. The Technical Committee for Standardization of Offshore Oil and Gas Industry and its authorized issuing units have made unremitting efforts to ensure the accuracy and reliability of the data contained therein. However, the Offshore Oil and Gas Industry Standardization Technical Committee and its authorized issuing units do not represent, guarantee or warrant the standards they publish, and hereby expressly declare that they do not bear any obligations or responsibilities for losses or damages caused by the use of these standards, for the use of standards that may conflict with any national and local regulations, and for the consequences of infringing any patent rights due to the use of these standards.
Offshore Oil and Gas Industry Standard of the People's Republic of China Specification for Cementing Design of Offshore oilwell Unit 1: Cement slurry design and test 1 Scope
This standard specifies the requirements for the design of water-mixed slurry performance for offshore oil cementing operations, the basis for determining the test conditions and the test methods. This standard is applicable to offshore oil and natural gas cementing, well repair and cementing operations 2 Referenced standards
SY/T10022.1—2001
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 valid. All standards are subject to revision. The parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T16783-1997 Field test procedure for water-based drilling fluid SY/T5480-92 Rheological properties of cement injection SY/T5546-92 Test method for application performance of cement in oil wells 3 Symbols This standard adopts the following symbols (see Table 1) Bottom circulation temperature Bottom static Symbol Explanation Cementing operation Circulation temperature at depth Cementing operation The maximum injection pressure at the depth of the wellbore is the geothermal gradient, the annual average temperature of the mud surface in the sea area (the annual average temperature of the sea level is used for water depths less than 24 meters), the maximum temperature of the drilling fluid circulating out of the wellhead, and the bottom static column pressure, and the vertical depth of the wellbore. Approved by the State Administration of Petroleum and Chemical Industry on September 21, 2000, and implemented on February 1, 2001. SY/T10022.1—2001
Table 1 (end) Explanation of symbols
Temperature increase rate of cement slurry from parallel port to bottom of wellBoard mixing temperature of cement slurry on the ground
Time for the leading part of mixed cement slurry to move from parallel port to bottom of wellBoard displacement of the leading part of mixed cement slurry from wellhead to bottom of wellBoard volume of casing
Estimated surface pressure when the leading part of cement slurry is injected into the wellheadPressure increase rate of cement slurry from parallel port to bottom of wellBoard return of cement slurry from bottom of well to annulus Temperature change rate at the predetermined design depth Circulating temperature at the top of the annular cement slurry column Average pumping displacement of the annular cement slurry Total volume of the annular cement slurry sealing section
Time for the leading part of the cement slurry to return from the bottom of the casing to the predetermined design depth of the annular cement slurry Pressure at the top of the annular cement slurry
Pressure change rate of the leading part of the cement slurry returning from the bottom of the casing to the top of the annular cement slurry Cement slurry service value
Drilling fluid service value
Permeability||t t||Casing eccentricity
Cement slurry core-void ratio
Cement slurry fluidity index
Flushing fluid fluidity index
Drilling fluid fluidity index
Flushing fluid yield value
Cement slurry service value
Drilling fluid service value
Cement slurry plastic viscosity
Drilling fluid plastic viscosity
Flushing fluid plastic viscosity
kPa/min
kP a/min
10-μamn
(dimensionless)
(dimensionless)
(dimensionless)
(dimensionless)
(dimensionless)
4 Determination of test conditions for cement slurry properties
4.1 Downhole circulating temperature
4.1:1 Measurement and calculation of downhole circulating temperature4.1.1.1 Measurement of downhole circulating temperature
SY/T 10022.1—2001
After the well is electrically measured and before the casing is lowered, the drilling fluid is circulated to the bottom. When the circulating temperature is basically stable, the circulating temperature values ​​at different depths are measured
4.1.1.2 Calculation of circulating temperature
If there is no above-mentioned measured temperature data, it can be calculated according to the following method based on known conditions: a) Known geothermal gradient:
BHCT =( × TVD
(BHST - T)× 100
b) Known bottom hole static temperature:
BHCT = BHST × F,
Where:
F. 1 Calculation empirical coefficient, generally 0.70-0.80, should be determined specifically for each sea area based on statistical data and T, BIST data acquisition accuracy. c) When the highest overflow of drilling fluid returning from the wellhead is known: ZVD
BHCT= To ×
d) When the vertical depth exceeds 3050m:
BHCT = T.
[0.01989 × TV)×(T ×0.54864 +0.32)] - 10.09151.0 - 0.00004938 × TVD
When more than one of the above methods is used for calculation, the highest value should be taken. 4.1.2 Circulating temperature at the top of the annular cement slurry column (4)
32..6.... (5)
The circulating temperature at the top of the annular cement slurry column should be determined based on the circulating temperature curve measured or calculated in the area that varies with drilling depth. 4.1.3 Temperature at the cement extrusion location
The temperature at the cement extrusion location can be calculated using the following formula: a1
Wherein:
F, a calculation empirical coefficient, generally taken as 0.90 ~ 0.95. h)
PSQT = T.
T ×7VD
+T)×F
[[0.0251×TVD×(T,×0.54864+0.32)]-8.20211.D - 0.00002647 × TVD
The result calculated using the above formula should take the higher value. 4.2 Cement slurry test pressure
4.2.1 Downhole liquid column pressure
The downhole liquid column pressure can be calculated by formula (8): RHP = 9.80 × p × 7VD
Where:
α - the density of the annulus during cement injection, which can be calculated by the following formula: × 0.56 ...
Wherein:
9m-annulus drilling fluid density
Q.-annulus isolation fluid density
9-annulus flushing fluid density;
.-annulus weighting fluid density
h-annulus drilling fluid vertical height
h-annulus isolation fluid vertical height;
hr-annulus flushing fluid vertical height;
h,-annulus weighting fluid vertical height;
P,-formation pore pressure;
7VD=hm+h,+h,+hu
4.2.2 Annulus cement column top pressure
SY/T10022.1—2001
p=P-ha+phtphytph
0× TVD>Pwww.bzxz.net
The pressure at the top of the annular cement column should be calculated by formulas (8) and (9), where TVD is the vertical depth of the top of the cement column. 4.2.3 The maximum squeeze pressure of cement slurry test for cement squeezing operation should be determined according to the formation fracture pressure. The maximum squeeze test pressure PSQP. 4.2.4 The test pressure of cement slurry for plugging operation
The test pressure of cement slurry for plugging operation PSQP should be determined according to the formation leakage pressure and the drilling fluid density that the formation can withstand to meet the requirements of the next drilling engineering operation.
4.3 Heating rate and pressurization rate
4.3.1 Heating rate
The heating rate is calculated by the following formula:
Wherein:
4.3.2 Pressurization rate
The pressurization rate is calculated by the following formula:
BHP-SP
4.4 Temperature and pressure change rate of cement slurry from the bottom of the well to the top of the cement slurry column in the wellbore 4.4.1 Temperature change rate
The temperature change rate is calculated by the following formula:
Wherein:
At>0 indicates heating, and At<0 indicates cooling. 4.4.2 Pressure change rate
4tTOCT-BHCT
The pressure change rate is calculated according to the following formula:
5 Cement slurry performance test method
5.1 Sampling
5.1.1 Taking cement samples
SY/T10022.1—2001
ADP=BIP-TOCP
（13）
Cement samples should be taken from bulk cement tanks, bagged containers or transportation lines at the oil field site. The cement samples must be dry and well mixed. According to the different sampling locations, qualified samplers (see Figure 1) should be used to extract samples in 67 batches. The samples taken should be representative, well mixed, packaged and labeled (see 5.17). The average sampling quantity should be 7.57 liters to 18.93 liters each time. 5.1.2 Sample dry-mixed cement
Sample dry-mixed cement mixed with solid cement admixtures shall be sampled at the location specified in 5.1.1. However, the sample shall be mixed by weighing cement and solid cement admixtures in batches, and then transported from one container (metering batch mixing container) to another container (wind transport may be used) for 4 to 6 times to mix evenly. According to the sampling location, qualified samplers shall be used for multiple sampling. The samples shall be mixed evenly, packaged and labeled. The number of samples shall meet the needs of completing the designed test
5.1.3 Sample solid-phase cement admixture
Solid-phase cement admixtures can be sampled from batch tanks or bagged containers. The samples must be dry and mixed evenly. Select qualified samplers according to the packaging container of solid-phase cement admixtures and sample from the center of the container. Then mix the samples obtained from the same batch evenly, package and label them. The number of samples shall meet the needs of the designed test. 5.1.4 Take liquid cement admixture samples
The liquid cement admixtures must be stirred evenly and representatively, and then the samples taken from the same batch must be mixed evenly, packaged and labeled. Needs.
5.1.5 Take cementing water samples
Take samples from the center of the packaging container with a sampler. The number of samples of liquid cement admixtures should meet the design test. Samples are drawn from the water source of cementing water. If the platform industrial water is supplied from different water sources, the platform industrial water should be taken as a sample. The water tank capacity should meet the needs of cementing water, and the water quality should be maintained before cementing, otherwise the sample should be re-sampled for testing. The number of samples should meet the needs of the test. 5.1.6 Taking mixed water samples
To extract mixed water from the mixed water source, the mixed water must be fully stirred and mixed evenly, without precipitation, stratification, floating and other phenomena. In order to avoid contamination, the same method should be used when sampling, and the samples should be packaged and labeled. The number of samples should meet the needs of the designed test. 5.1.7 Sample transportation and storage
The test samples must be immediately placed in clean, dry, sealed, moisture-proof containers for easy transportation and long-term storage. The container should be lined with metal, plastic or other thick-walled flexible or rigid materials to maximize the protection of the original properties of the sample. Before transportation, the relatively sealed plastic bag containing the sample should be placed in a sturdy packaging container to prevent perforation or leakage during transportation. Glass containers should not be used for transportation. Each sample and the container that needs to be transported and packaged should be clearly marked with the material name, batch number, sampling location and date. All sampling records and other documents should be placed in the container or attached to the container body. Dangerous samples should be strictly packaged and clearly marked in accordance with relevant national management regulations.
5.1.8 Sample preparation before testing
When samples arrive at the laboratory, they should be strictly checked to see if they are sealed and uncontaminated. When preparing cement slurry, the samples should be fully mixed and the quality of each sample should be checked. For easy storage, each sample should be placed in a container that meets the requirements, labeled, dated, and placed in a dry place with relatively constant room temperature (constant temperature). All samples must be checked for the maximum expiration date provided by the supplier or manufacturer, and any cement admixture that has exceeded the expiration date or has been stored for more than one year should not be used.
Top view of flow sample distributor
SY/T 10022.12001
Vent hole
20(520.7mm)
28*:(730.3mm)
Hardwood handle
Brass tube volume about=320ml
Bagged cement sampler
Cement mixed sampler
Figure 1 Commonly used sampling equipment
Sample extension tube
Product discharge pipe
Cement automatic sampler
Improved flow sample distributor
0 Flow direction
1°Butterfly valve
Lateral sampler view
5.1.9 Handling of cement slurry test samples
SY/T 10022.1—2001
The handling of cement slurry test samples shall comply with the relevant national laws and regulations. 5.2 Preparation of cement slurry
This section specifies the procedures for preparing cement slurry of less than 600ml in the laboratory. The procedures for preparing cement slurry in large quantities exceeding 600rl are shown in Appendix A
5.2.1 Instruments
5.2.1.1 Electronic balance
The weighing accuracy of the electronic balance shall be within ±0.1% of its calibrated weighing range. In order to ensure the weighing accuracy, the electronic balance shall be calibrated.
5.2.1.2 Mechanical balance
The weighing magnetic code or sliding code used in the mechanical balance shall have an accuracy within ±0.1% of its calibrated weighing range. 5.2.1.3 Mixing device
For the preparation of cement slurry, a paddle-type agitator with a capacity of 946.35 ml per quart and a bottom drive device (see Figures 2 and 3) should be used. The mixing cup and the impeller are made of corrosion-resistant materials, and the impeller should be able to be separated from the drive mechanism. The impeller should be weighed before use and replaced when the weight loss is 10% of the weight of a new impeller. Before each use, the paddle should be visually inspected for damage, otherwise it should be replaced. When mixing cement slurry, any leakage should be immediately discarded, repaired and retested. Figure 2 Agitator sample
SY/T 10022.1—2001
Cone-down assembly
Parts list
Part number
NutQuenched impeller
Forward thrust washer
Shaft plug
Bearing seat
Hexagonal nut
Figure 3 Paddle assembly diagram
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