SY/T 7832-2024 Technical requirements for heavy oil development by air injection English, Anglais, Englisch, Inglés, えいご
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ICS
E
Professional standard of the People's Republic of China
SY/T 7832-2024
Technical requirements for heavy oil development by air injection
稠油油藏注空气开发技术要求
(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 Reservoir Description Techniques
4.1 Stratigraphic Division and Correlation
4.2 Structural Characteristics
4.3 Reservoir Characteristics
4.4 Fluid Properties and Distribution
4.5 Reservoir Temperature and Pressure System
4.6 Reservoir Type
4.7 Establishment of Reservoir Geological Model
4.8 Reserve Calculation
5 Evaluation of Development Status Before Air Injection
5.1 Evaluation of Current Development Status
5.2 Analysis of Injection Conditions
5.3 Production Characteristics and Patterns
5.4 Influencing Factors
5.5 Remaining Oil Distribution
5.6 Potential Analysis
6 Laboratory Experimental Evaluation
6.1 Parameter Determination
6.2 Physical Simulation Experiments
7 Reservoir Engineering Design Techniques
7.1 Optimization of Combustion Mode
7.2 Division of Layer Series and Interval Combination
7.3 Well Pattern and Spacing Design
7.4 Injection-Production Parameter Design
7.5 Plan Deployment and Development Indicator Prediction
8 Reservoir Requirements for Supporting Process Technologies
8.1 Drilling and Production Requirements
8.2 Surface Facility Requirements
9 Regulation and Control Techniques
9.1 Response Characteristics
9.2 Regulation and Control Countermeasures
10 Economic Evaluation Techniques
10.1 Evaluation Principles and Methods
10.2 Evaluation Parameters
10.3 Financial Evaluation and Benefit Analysis
10.4 Risk Prediction and Assessment
10.5 Optimization Suggestions
11 Health, Safety, and Environmental (HSE) Requirements
Appendix A (Normative) Methods for Identifying Combustion State
Technical Requirements for Air Injection Development in Heavy Oil Reservoirs
1 Scope
This document specifies the reservoir description techniques, evaluation of development status before air injection, laboratory experimental evaluation, reservoir engineering design techniques, reservoir requirements for supporting process technologies, regulation and control techniques, economic evaluation techniques, and health, safety, and environmental (HSE) requirements for air injection development in heavy oil reservoirs.
This document applies to the design and regulation of in-situ combustion in the air injection development method for heavy oil reservoirs. Other air injection development methods may refer to this document.
2 Normative References
The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 14554 Emission standard for odor pollutants
GB 16297 Comprehensive emission standard of air pollutants
SY/T 5579.2 Reservoir description method — Part 2: Clastic reservoir
SY/T 5851 Technical requirements for oilfield development adjustment plan compilation
SY/T 6511 Technical specification for economic evaluation of oilfield development program and adjustment program
SY/T 6898 Determination method for basic parameters of in-situ combustion
SY/T 6954 Determination method of crude oil oxidation kinetic parameters
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
heavy oil development by air injection
A production method where air is injected into a heavy oil reservoir to induce oxidation reactions, resulting in reservoir combustion. The generated flue gas and heat drive the crude oil towards production wells.
3.2
threshold temperature
The minimum ignition temperature required to ignite oil sand within 1 hour under conditions of continuous constant-rate air injection.
3.3
produced gas
Gas produced from production wells during heavy oil development by air injection (3.1).
Note: Mainly composed of nitrogen and carbon dioxide, containing small amounts of hydrocarbons or trace amounts of oxygen, carbon monoxide, hydrogen sulfide, and smoke particulates.
4 Reservoir Description Techniques
4.1 Stratigraphic Division and Correlation
Shall be implemented according to the provisions of SY/T 5579.2.
4.2 Structural Characteristics
Shall be implemented according to the provisions of SY/T 5579.2, with emphasis on describing structural characteristics such as fault sealing and formation dip, providing a basis for preventing injected air leakage and deploying well patterns.
4.3 Reservoir Characteristics
Shall be implemented according to the provisions of SY/T 5579.2, with emphasis on describing preferential flow channels, the sealing pressure of the top and bottom surfaces of the target development zone and interlayers/interbeds, and the thermodynamic properties of intra-layer interbeds, providing a basis for optimizing development intervals and analyzing gas channeling in heavy oil reservoir air injection development.
4.4 Fluid Properties and Distribution
Shall be implemented according to the provisions of SY/T 5579.2.
4.5 Reservoir Temperature and Pressure System
Shall be implemented according to the provisions of SY/T 5579.2, with emphasis on describing changes in reservoir temperature and pressure during the development process, providing a basis for designing parameters for heavy oil reservoir air injection development and selecting air compressors.
4.6 Reservoir Type
Shall be implemented according to the provisions of SY/T 5579.2.
4.7 Establishment of Reservoir Geological Model
Shall be implemented according to the provisions of SY/T 5579.2.
4.8 Reserve Calculation
Shall be implemented according to the provisions of SY/T 5579.2.
5 Evaluation of Development Status Before Air Injection
5.1 Evaluation of Current Development Status
Shall be implemented according to the provisions of SY/T 5851.
5.2 Analysis of Injection Conditions
Divided into two cases based on the injection medium:
a) When the injection medium is steam, parameters such as wellhead and bottomhole steam injection temperature, steam injection quality, steam injection pressure, steam injection intensity, steam injection rate, cycle steam injection volume, and steam injectivity shall be analyzed;
b) When the injection medium is water, parameters such as water injection intensity, water injection rate, water injection pressure, and water injectivity shall be analyzed.
5.3 Production Characteristics and Patterns
Analyze well conditions of production wells, bottomhole temperature, wellhead temperature, formation pressure, crude oil viscosity and density, and also analyze changes and patterns of development indicators such as liquid production rate and oil production rate.
5.4 Influencing Factors
Analyze key factors affecting development effectiveness from three aspects: geology, development, and engineering:
a) Geological factors include structural location, formation dip, fault sealing, reservoir physical properties, preferential flow channels, interlayers/interbeds, oil layer thickness, oil saturation, edge and bottom water energy, etc.;
b) Development factors include injection-production well pattern, degree of reserve control and utilization, injection-production parameters, perforation location, adjustment measures, etc.;
