SY/T 5338-2000 Recommended Practice for Sand Control Technology for Reinforcement of Well Wall
Some standard content:
[CS 75. 020
Record number: 6825-2000
Petroleum and natural gas industry standard of the People's Republic of China SY/T 53382000
Recommended practice for sand consolidationof strengthen borehole wall
2000-03-10 Issued
State Administration of Petroleum and Chemical Industry
2000-10-01 Implementation
SY/T5338-2000
1 Scope
2 Reference standards
4 Two common methods of strengthening borehole wall for sand control and supporting parameter design Preparatory work before sand control construction
6 Downhole operation of sand control wells and sand control construction procedures 7 Quality control||tt| |8 On-site construction safety and environmental protection requirements
Appendix A (suggested appendix)
Appendix B (suggested appendix)
Appendix (suggested appendix)
Appendix D (suggested appendix)
Format of the commission for the design of the process for reinforcing the shaft wall with resin solution to prevent sand Resin solution reinforced shaft wall sand control process design format Resin solution reinforced shaft wall sand control construction design format Resin solution reinforced shaft wall sand control construction summary format 5
SY/T 5338—2000
This standard is based on the development of chemical reinforcement sand control technology in recent years in major sand-producing oil fields in my country, and is revised from SY/T5338--88 "Recommended Practice for Reinforced Well Wall Sand Control". The revised standard is renamed "Recommended Practice for Reinforced Well Wall Sand Control Technology", and the inapplicable internal wear is deleted and revised. The deleted and revised contents mainly include: 1) the selection of phenolic resin sand control technology methods and parameter design in 4.1 of the original standard; 2) the relevant contents of the operation procedures and sand control construction; 3) the non-standard and inapplicable tables and related texts in the appendix. In addition, according to the development and application of new technologies, some contents have been added, mainly including: 1) one-time injection method of chemical solution sand control technology; 2) the scope of application of various technologies; 3) on-site construction environmental protection requirements; 4) the sand control design entrustment form and sand control process design format in the appendix have been added.
This standard will replace SY/T5338-88 from the date of entry into force. Appendix A, Appendix B, Appendix C and Appendix D of this standard are all indicative appendices. This standard is proposed by China National Petroleum Corporation. This standard is under the jurisdiction of the Oil and Gas Production Professional Standard Promotion Committee. This standard was drafted by: Dagang Shantian Group Drilling and Production Technology Research Institute. The main drafters of this standard are Ji Xiaodong, Ma Jianmin, Li Huaiwen and Liu Jianxun. This standard was first issued in February 1989. This is the first revision. 1 Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Recommended Practice for Sand Consolidation of Strengthen Borehole Wall
Recommcnded Practice for Sand Consolidation of Strengthen Borehole Wall
SY/T 5338—2000
Replaces 5338—88
This standard specifies the construction fluid, application scope, preparation method, parameter design, pre-construction preparation, downhole operation procedures, sand control construction procedures and quality requirements of two commonly used methods of sand consolidation technology for loose sandstone reservoirs, and uses this as a reference for other similar technologies.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions recommended by this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB32U—1993 Synthetic hydrochloric acid for industrial use
SY/T5183--87 Recommended method for evaluating the effect of oil and sand controlSY5276—91 Determination method of flexural and compressive strength and permeability of artificial core for chemical sand controlSY/T5587.5-93 Oil and water well belt repair and operation procedures for water lifting and sand surface exploration and sand flushing operationsSY/T5971-94 Performance evaluation method of clay stabilizer for water injectionSY/T6362—-1998 Guide to health, safety and environmental management system for downhole operations of petroleum and natural gas 3 Terminology
3.1 Cleaning fluid
Liquid used to clean the surface source oil of sand particles in the formation, remove pollution in the near-well area, improve the cementation conditions of sand particles, and improve the effect of sand consolidation.
3.2 Untiswelling agent
Pretreatment agent for preventing water-sensitive clay from swelling when exposed to water. 3.3 Pad Iluid
Liquid squeezed into the formation before sand control construction, used for pretreatment such as formation cleaning and anti-swelling. 3.4 Sand consolidation for sirerigthen burehole wall Sand consolidation for sirerigthen burehole wall A sand control method that squeezes a certain amount of organic or inorganic binders and treatment fluids into the formation, and under the action of the formation temperature and curing agents, the loose formation sand is cemented into a well wall with a certain strength and permeability, thereby preventing sand from coming out of the formation. 3.s Overflush fluid
A liquid that displaces the free resin squeezed between the sand particles in the formation, so that the well wall retains a certain amount of liquid flow channels. 3.6 One-step sand and consolidation refers to a chemical solution sand control method in which the resin glue liquid is combined with its supporting curing agent and other additives in the sand control process and injected into the well at one time.
3.7 Displacement fluid
Construction fluid used to displace all the construction fluids remaining in the surface pipeline and wellbore into the formation at the end of construction! Approved by China Petroleum and Chemical Industry Bureau on March 10, 2000, implemented on October 1, 2000
SY/T 5338—2000
4 Two common methods of reinforcing and controlling sand walls and supporting parameter design 4.1 One-time injection method of resin solution sand control technology 4.1.1 Scope of application
a) Used in oil wells and water wells;
b) Temperature range: 30～70℃
c) Oil and water wells with a total output of less than 3.0m3;
d) Ordinary wells, inclined wells and wells with slight casing change but no casing leakage 4.1.2 Construction fluid and preparation method
The one-time injection method of resin solution sand control construction fluid and preparation method are shown in Table 1. Table 1 One-time injection method resin solution sand control construction fluid and preparation method Construction fluid name
Pre-storage
Resin quenching liquid
Pore-increasing liquid
Displacing liquid
Preparation method
2% anti-swelling agent + 2%~5% cleaning agent + clean water, mix and stir well Resin solution + surface agent (ratio 10:1), mix and stir well Shade and reserve Clean water
4.1.3 Technical indicators and dosage of each construction fluid Parameter design 4.1.3.1 Technical indicators and dosage of resin solution: a) Appearance: brown-yellow flat transparent viscous liquid. b) Solubility: easily soluble in alcohol and other organic crushing agents c) Effective content: 40%~60%.
d) Viscosity (25): 18--30mPa*sc
e) Density: 0.9-1.2g/cm3,
) pH value: 6.0-7.0g
\) Artificial core compressive strength: greater than 5.0MPac The test method for artificial core compressive strength shall be implemented in accordance with SY5276. h) Dosage: The recommended dosage of resin solution per meter of perforated oil layer is 0.25-0.40m4.1.3.2 Technical indicators and dosage of regeneration agent: a) Appearance: colorless and transparent or light yellow transparent liquid. b) Solubility: easily soluble in organic solvents such as alcohols. e) Viscosity (25): 2-5mPa'so
d) Density (25C): 0.85--1.0g/cm*. e) pH value: 5.0-6.0.
f) Dosage: 10% of the weight of the resin solution. 4.1.3.3 Preparation and dosage of pre-fluid:
a) Dosage of pre-fluid: 1.5--2.0m2 per meter of oil layer. b) Preparation of pre-fluid: 2% anti-swelling agent + 2%~5% cleaning agent and clean water, see Table 1. 4.1.3.4 Technical requirements for anti-swelling agent in pre-fluid: a) Solubility: 100% soluble in water.
SY/T 5338--2000
b Anti-swelling performance: The anti-swelling rate tested by soaking local cores is not less than 70%. The anti-swelling rate test method is implemented in accordance with SY/15971. c) Compatibility: The damage value to the core cementation strength and permeability is not more than 15%. d) Dosage: Add 2% anti-swelling agent per cubic meter of pre-fluid. 4.1.3.5 Technical requirements for cleaning agents in pre-fluid; a) Emulsification stability: no stratification after 24 hours of placement. b) Cleaning performance: the oil washing rate for local crude oil at formation temperature is not less than 90%. d) Compatibility: the damage value to the core cementation strength and permeability is not more than 10%. d) Dosage: 2% to 5% of cleaning agent is added to each cubic meter of pre-fluid. 4.1.3.6 Quality requirements and dosage of displacement fluid and pore-increasing fluid: a) Quality requirements: the displacement fluid and pore-increasing fluid used in this process are clean and pollution-free water. b) Dosage of pore-increasing fluid: calculated as 6 times the designed dosage of resin solution. d) Dosage of displacement fluid: calculated as 1 times the sum of the surface manifold volume + wellbore volume. 4.1.4 Modification of construction fluid displacement and pump pressure parameters The design of the displacement and pump pressure parameters of the resin solution sand control construction fluid of the one-time injection method is shown in Table 2. Table 2 One-time injection method resin solution sand control liquid displacement and pump pressure parameters Design Construction fluid name
Reference displacement, L/min
System pressure, MPa
4.1.5 Construction fluid extrusion sequence
a) Pre-fluid.
b) Resin solution.
c) Clean water for displacement and hole expansion.
4.2 Phenolic resin solution sand control technology
4.2.1 Application scope
a) Oil wells with water content less than 20%.
b) Temperature range under the well: 45～70C
Pre-fluid
600 ~800
c) Oil wells with a total sand plate less than 1.0m.
d) Ordinary wells, inclined wells and oil wells with slight casing changes but no casing leakage 4,2.2 Method selection
Resin solution
400--600
Xiaoding formation was suppressed
Phenolic resin reinforcement of well wall sand control can be divided into two types according to the selection of cleaning fluid and pore increase fluid, see Table 3. Table 3 Phenolic resin reinforcement of well wall sand control method selection Cleaning fluid name
Fangwo one
Lifa three
4.2.3 Application fluid preparation method
Water-based cleaning fluid
Cavity binder name
Formaldehyde resin
Phenolic resin
Phenolic resin reinforcement of well wall sand control construction fluid preparation method see Table 4. Pore increase name
Water-based cleaning fluid
Replacement and pore increase with clean water
600 --800
Name of chemical agent
10% hydrochloric acid
10% hydrochloric acid
Name of application liquid
Water-based cleaning liquid
Curing agent
SY/T5338—2000
Table 4 Preparation method of phenolic resin reinforcement well wall sand prevention construction liquid Preparation method
2%-5% cleaning agent + clean water, mix and stir to make it uniform Use 3U% per ton of curing agent solution1. Industrial hydrochloric acid 0.3~0.5t + 36% industrial formaldehyde 0.025t + clean water 0.7~0.5t, mix and stir to make it uniform
4.2. Technical indicators and dosage of each construction liquid Parameter design 4.2.4.1 Technical indicators and dosage of phenolic resin used in method 1: a) Appearance: brown-red transparent viscous liquid. b) Effective content: 55%--65%
) Viscosity (20℃): 150～350m*ss
The hydrochloric acid concentration of the prepared curing agent is 10%～15%, and the dosage of 3G% formaldehyde solution is 2.5% of the weight of the whole curing agent d) Free phenol content: less than 10%.
e) Dosage: The recommended dosage of resin solution per meter of perforated oil layer is 0.30～0.35m3. 4.2.4.2 Technical indicators and dosage of phenolic resin used in method 2:) Appearance: brown-red transparent viscous liquid. b) Effective content: 75%-85%.
c) Viscosity (20℃): 150～350mPascd) Free phenol content: less than 21%.
e) Dosage: The recommended dosage of resin solution per meter of perforated oil layer is 0.20~~0.30m2. 4.2.4.3 Technical requirements and dosage of cleaning agent: a) Water-based cleaning agent is recommended for phenolic resin reinforcement and wall sand control method 1, its technical requirements and dosage are the same as 4.1.3.5, and the preparation is shown in Table 4.
1) Diesel is recommended for phenolic resin reinforcement and wall sand control method 2, and the volume dosage is twice the volume dosage of resin. 4.2.4.4 The dosage of pore-increasing fluid for construction: The volume dosage of pore-increasing fluid in recommended methods 1 and 2 is twice the volume dosage of resin. 4.2.4.5 Curing agent and dosage: Curing agent is 10%~15% hydrochloric acid prepared with industrial hydrochloric acid with a mass fraction of .30% (technical indicators see GB320), and its volume dosage is twice the volume dosage of resin. A 36% formaldehyde solution should be added as a preservative, and the dosage is 2.5% of the weight of the curing agent. 4.2.4.6 Displacement fluid dosage: It is recommended to be one time the sum of the volume of the surface pipeline and the wellbore. 4.2.5 Design of construction fluid displacement and pump pressure parameters See 5 for the design of construction fluid displacement and pump pressure parameters for phenolic resin reinforced wall sand control. Table 5 Design of construction fluid displacement and pump pressure parameters
Application 1 Wave name
Reference displacement, L/min
Pump pressure, MPa
Pre-fluid
600 800
4.2. Construction fluid extrusion sequence
a) Pre-fluid.
Resin solution
400. -6tH)
600-800
Less than the formation fracture pressure
Hydrochloric acid solution
600-800
Displacement fluid
G00--8U
h) Resin solution.
) Pore increasing fluid.
d) Hydrochloric acid solution.
e) Displacement fluid.
5 Preparation work before sand control construction
5.1 Data collection
$Y/T 5338--2000
After receiving the design commission and geological design [see Appendix A (suggested Appendix)] from Party A, the basic data and relevant information of sand control construction should be collected, as detailed in Appendix C (suggested Appendix). 5.2 Preparation of process design
Prepare the process design according to the basic data of the construction well. The format is shown in Appendix B (suggested Appendix). 5.3 Preparation of drilling holes
5.3.1 The cementing quality of sand control wells should be checked. Channeling is not allowed. If channeling occurs, it must be sealed. 5.3.2 For early sand control, high-density perforation is recommended, with a hole density of 20 to 36 holes/mg. 5.3.3 Use negative pressure perforation to remove dirt in time to ensure that the blasthole is unobstructed. 5.3.4 For later sand control, the blasthole flusher should be used to thoroughly flush the blasthole before construction. 5.3.5 Requirements for well killing fluid and sand flushing fluid: a) Determine the type of well killing fluid used in sand control wells based on the oil layer and fluid physical properties of the construction well. b) The well killing fluid should be clean, with no solid phase or low solid phase, and no damage to the oil layer. 5.4 Formation acidification and anti-swelling treatment
Decide whether to carry out formation acidification and anti-swelling treatment according to the clay content in the formation core and the formation damage. 5.5 Construction equipment
5.5.1 Liquid preparation container: Prepare the container according to the performance and amount of the construction liquid. The piercer should be clean and leak-free, and the valve should open flexibly. 5.5.2Prepare the injection pump vehicle group and the required manifold and pipeline according to the construction design. 5.5.3 The water-based cleaning fluid is filtered with a 5--2μm filter device. 6 Downhole operations and sand control construction procedures for sand control wells 6.1 Downhole operation procedures
6.1.1 Killing wells and pulling out production pipes
6.1.1.1 The selection of the relative density of the killing fluid should be determined according to the oil layer pressure or the static pressure of the adjacent and same layers to prevent leakage and blowout 6.1.1.2 The pulled out production pipe string should be cleaned, measured, recorded, and carefully inspected. The oil pipe and thread must be intact, otherwise a new oil pipe should be replaced.
6.1.2 Sand surface detection and sand flushing
Sand surface detection and sand flushing shall be carried out in accordance with SY/T5587.5 6.1.3 Sand control construction methods
6.1.3.1 The sand control well section is not more than 60l, and multi-layer section combined prevention is adopted; the sand control well section is more than 60m, and segmented sand control is adopted. 6.1.3.2 The sand control construction pipe column is completed 15-20m above the layer boundary on the sand control day. 6.2 Sand control construction TbZxz.net
6.2.1 Arrange the construction site and connect the construction manifold 6.2, 1.1 Prepare all the construction materials and various construction fluids according to the construction design requirements. 6.2.1.z Place the construction vehicle in the best position and connect the manifold. When the manifold pressure test pressure is 1.5 times the construction design working pressure, it is qualified if there is no puncture or leakage.
6.2.2 Construction work
SY/T 5338-2UM
6.2.2.1. Start the pump to replace the pre-fluid with more than one times the volume of the tubing. After the liquid returns from the casing outlet, close the casing gate and squeeze out clean water. When the displacement is less than 100l/min under normal construction pump pressure, sand flushing or hot washing and other dredging measures should be carried out. After re-testing and squeezing out normally, construction can be started. According to different process requirements, pre-fluid, resin solution and displacement fluid and other construction fluids are pumped into the well in turn. Construction must be carried out continuously, the displacement should be kept within the design parameter range, and the pump cannot be stopped. See. 2.2.2 If a sand packer is used for layer selection and sand control, unseal it after squeezing out the displacement fluid, lift the pipe string more than 20m after the pressure diffuses, install the wellhead, and
6.2.2.3 Shut down the well and wait for 4872h.
6.2.3 Preparation for production
6.2.3.1 After waiting for condensation, explore the sand surface. If there is a packer, pull out the original pipe string in the well, and lower the smooth oil pipe with a pen tip to explore the sand surface. If there is a plug, drill to the required depth.
6.2.3.2 Lower the scraper to scrape the casing below the oil layer, and thoroughly wash the well by displacement. 6.2.3.3 Lower the current production pipe string as required.
7 Quality control
7.1 The construction work must strictly follow the design requirements and accurately calculate the various amounts of squeezers. 7.2 After each process of sand control work is completed, quality acceptance is carried out. 7.3 After the sand control work is completed, write a construction summary [format see Appendix D (Suggested Appendix)] and archive it. 7.4 The effect of the sand control construction work of reinforcing the well wall shall be evaluated in accordance with SY/T5183. 8 On-site construction safety and environmental protection requirements
On-site construction safety and environmental protection requirements shall be implemented in accordance with SY/T6362. Al
Format of the design commission
SY/T 5338---2000
Appendix A
(Appendix for reference)
Format of the design letter of entrustment for sand prevention technology of resin drop reinforcement The size of the design letter of entrustment is 260mm×187mmsAZFormat of the design letter of entrustment
The format of the design letter of entrustment is shown in Figure A1. And sand prevention design letter of entrustment
And entrust your unit with the design (plan). After receiving the letter of entrustment and geological design, please complete the design (plan) and submit it to the entrustment within days Requirements:
Signature of the entrustment reviewer:
Opinions of the receiving unit:
Signature of the entruster
Signature of the recipient
Date of entrustment
Date of receipt
Seal of the entrusting unit:
Contact number
Contact number
Format of the design book
SY/T 5338—20
Appendix B
(Suggested Appendix)
Design book of resin solution reinforcement for wellbore sand control The format of the design book is 260mm×187mmzB2
Cover format of the design book
The cover format of the design book is shown in Figure B1, Oilfield
Resin solution reinforcement for wellbore sand control Design:
Review:
Approval:
B3 Content format of the design book
1. Optimization and selection of process technology,
2. Construction steps and parameters
SY/T 5338—2000
1. Press and pull out the original pipe string, clean it thoroughly, and measure it accurately. 2. Seal the layer or perforate it according to the geological plan. 3. Lower the
mm oil pipe with
and pass the well gauge to the
mm pen tip sand surface and flush (fill) silicon to
5. After the re-exploration sand surface is qualified, lower the sand control construction pipe string to complete" 6. Construction:
1) Prepare the liquid (see Table B1).
2) Construction (parameters and procedures are shown in Table B2,
Construction raw material requirements are shown in Table B3)
3) Shut in the well and wait for solidification
4) Use after opening the well
Construction fluid name
mm tubing belt
Construction content
mm pen tip to detect the resin surface and punch and drill to
Table B2
Construction fluid dosage
Construction liquid preparation
Construction steps and parameters
Pump pressure during construction
Positive force of formation
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