SY/T 6257-2024 Project design of injection & production technoiogy for steam huff & puff English, Anglais, Englisch, Inglés, えいご
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ICS
E
Professional standard of the People's Republic of China
SY/T 6257-2024
Replaces SY/T 6257-2010
Project design of injection & production technology for steam huff & puff
蒸汽吞吐注采工艺方案设计
(English Translation)
Issue date: 2024-12-25 Implementation date: 2025-06-25
Issued by National Development and Reform Commission, P.R.C
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Basic Data
5 Reservoir Protection Measures and Requirements
6 Completion Process Design
7 Sand Control Process Design
8 Steam Injection Process Design
9 Oil Production Process Design
10 Injection-Production Monitoring Design
11 Investment Estimation
12 HSE and Energy Saving & Consumption Reduction Requirements
Appendix A (Informative) Calculation Method for Wellbore Thermal Parameters
1 Scope
This document specifies the design content, methods, and technical requirements for the injection-production technology scheme of steam stimulation in heavy oil reservoirs.
This document is applicable to the preparation of injection-production technology schemes for steam stimulation in heavy oil reservoirs.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute indispensable provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 20657 Petroleum and natural gas industries — Equations and calculations for the properties of casing, tubing, drill pipe and line pipe used as casing or tubing
GB/T 31453 Monitoring and testing code for energy conservation of oilfield production system
GB/T 34907 Technical conditions and adaptability evaluation method for casing of heavy oil thermal recovery wells
SY/T 5106 Petroleum drilling and production equipment — Specification for packers
SY/T 5185 Measurement method for property of gravel pack water base carrying fluid
SY/T 5324 Pre-stressed insulated tubing
SY/T 5328 Petroleum drilling and production equipment — Wellhead equipment for thermal recovery
SY/T 5337 Technical requirements of gravel pack tool
SY/T 5338 Procedure of wellbore reinforcement and artificial wellbore sand control
SY/T 5340 Method of gravel pack sand control
SY/T 5358 Laboratory evaluation method of flow velocity sensitivity for reservoir
SY/T 5587.10 Code for conventional workover job — Part 10: Hydraulic sand blasting perforation
SY/T 5724 Design for casing string structure and strength
SY/T 5729 Code for cementing job in heavy oil thermal recovery well
SY/T 5873 Design and operation code of rod pumping system
SY/T 5904 Principle of selecting well for electrical submersible pump and design method of pump selection
SY/T 5971 Evaluation method for performance of clay stabilizer used in fracturing, acidizing and water injection of oil and gas fields
SY/T 6086 Operating technical code for steam injection boiler and water treatment system of oil field
SY/T 6102 Specification for oilfield development monitoring and data collection
SY/T 6268 Recommended practice for selection of oil well pipe
SY/T 6354 Safety technique specification for steam injection thermal recovery of heavy oil
SY/T 6570 Compilation specification for oil well lifting process design
SY/T 6592 Evaluation method for cementing quality
SY/T 6916 Petroleum and natural gas industries — Downhole tools — Sand control screen
SY/T 7083 Special reciprocating oil well pump
SY/T 7455 Technical specification for viscosity reduction in wellbore of heavy oil wells
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
steam dryness
The mass percentage of dry saturated steam contained in one kilogram of steam.
3.2
oil-steam ratio
The ratio of oil production to steam injection volume (water equivalent) by mass in steam injection production.
4 Basic Data
4.1 Reservoir Geology
4.1.1 Geographical and Structural Location
Geographical location of the reservoir, structural location (structural location map), geomorphological conditions, and relationship with surrounding faults and adjacent blocks; main pay zones, oil-bearing area, geological reserves, reservoir depth, reservoir thickness, net pay thickness, recovery factor, recoverable reserves, etc., planned for development in the scheme.
4.1.2 Reservoir Characteristics
4.1.2.1 Reservoir Distribution
Areal distribution of each sublayer, range of reservoir thickness.
4.1.2.2 Lithological Characteristics
Rock type, mineral characteristics, particle size distribution, roundness, contact relationship, sorting, sorting coefficient, cementation type, cement composition and content, pore type, lithology and connectivity.
4.1.2.3 Physical Property Characteristics
Reservoir porosity, permeability range and average values, reservoir oil saturation range and average values, pore size and distribution, throat size and distribution, pore-throat connectivity, pore-throat seepage parameters, characteristics of clay minerals within pores, etc.
4.1.2.4 Heterogeneity
Intra-layer, inter-layer, and areal heterogeneity.
4.1.2.5 Wettability
Wettability type and wettability contact angle, etc.
4.1.2.6 Sensitivity
Evaluation results of velocity sensitivity, water sensitivity, salt sensitivity, alkali sensitivity, acid sensitivity, and stress sensitivity.
4.1.2.7 Temperature and Pressure System
Formation temperature, geothermal gradient, formation pressure, pressure coefficient, type of temperature and pressure system.
4.1.2.8 Fluid Properties
Data on crude oil viscosity versus temperature relationship, crude oil pour point, wax content, sulfur content, etc., content of saturates, aromatics, resins, asphaltenes in crude oil, formation water type, salinity, main ion content, natural gas composition analysis, initial gas-oil ratio, etc., variation and distribution pattern of crude oil viscosity areally and vertically, crude oil saturation pressure.
4.1.3 Reservoir Type
Comprehensive description of oil-water relationship and reservoir type.
4.2 Reservoir Engineering Scheme Deployment
4.2.1 Well Pattern Deployment
Well type, well pattern, well spacing, and designed number of wells.
4.2.2 Productivity Forecast
Block development (adjustment) forecast mainly includes annual total number of oil wells, number of producing oil wells, daily fluid production per well, daily oil production per well,
