SY/T 5579.2-2024 Reservoir description method - Part 2 :Fragmental reservoir English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
E
Professional standard of the People's Republic of China
SY/T 5579.2-2024
Replaces SY/T 5579.2-2008
Reservoir description method Part 2: Fragmental reservoir
油藏描述方法 第2部分：碎屑岩油藏
(English Translation)
Issue date: 2024-12-25 Implementation date: 2025-06-25
Issued by National Development and Reform Commission, P.R.C
Contents
Foreword
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Division and Tasks of Reservoir Description Stages
5 Basic Data Required for Reservoir Description
6 Content of Reservoir Description
6.1 Description of Regional Geological Characteristics
6.2 Stratigraphic Division and Correlation
6.3 Structural Description
6.4 Reservoir Description
6.5 Distribution Characteristics of Oil, Gas, and Water
6.6 Fluid Properties
6.7 Reservoir Temperature and Pressure System
6.8 Drive Energy and Drive Type
6.9 Reservoir Type
6.10 Establishment of 3D Geological Model
6.11 Reserve Estimation
6.12 Description of Remaining Oil
7 Requirements for Reservoir Description at Each Development Stage
8 Result Maps and Electronic Documents for Reservoir Description
Reservoir Description Method - Part 2: Clastic Rock Reservoirs
1 Scope
This document specifies the phase division and tasks, basic data, main content, and technical requirements for the description of clastic rock reservoirs.
This document is applicable to the description of clastic rock reservoirs.
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.
DZ/T 0217 Specification for estimation of oil and natural gas reserves
SY/T 5358 Evaluation method for reservoir sensitivity flow experiment
SY/T 5368 Identification of rock thin section
SY/T 5481 Technical specification for structural interpretation of seismic data
SY/T 5523 Analysis method for oilfield water
SY/T 5579.1 Reservoir description method – Part 1: General principles
SY/T 6169 Reservoir classification
SY/T 7378 Technical specification for establishing 3D quantitative geological model of oil and gas reservoirs
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
sedimentary cycle
A sequence of sedimentary strata that reflects regular changes in the sedimentary environment, characterized by a vertically recurring succession of depositional patterns.
3.2
reservoir architecture
The geometry, scale, orientation, and stacking relationships of reservoir constituent units at different hierarchical levels.
Note: Also referred to as reservoir building structure, including reservoir bounding surfaces at different hierarchical levels and the geological bodies formed in different geological periods separated by these surfaces.
4 Division and Tasks of Reservoir Description Stages
Implement according to the provisions of SY/T 5579.1.
5 Basic Data Required for Reservoir Description
Implement according to the provisions of SY/T 5579.1.
6 Content of Reservoir Description
6.1 Description of Regional Geological Characteristics
Implement according to the provisions of SY/T 5579.1.
6.2 Stratigraphic Division and Correlation
6.2.1 Regional Stratigraphic Division and Correlation
Implement according to the provisions of SY/T 5579.1.
6.2.2 Fine Stratigraphic Division and Correlation
6.2.2.1 Fine Stratigraphic Division
6.2.2.1.1 Oil Layer Group Division
6.2.2.1.1.1 Intervals with relatively similar depositional environments, distribution patterns, rock properties, physical characteristics, and hydrocarbon properties shall be divided into one oil layer group. An oil layer group may consist of one or several sand layer groups.
6.2.2.1.1.2 Oil layer groups shall be separated by relatively thick and stably distributed interlayers. The boundary lines should align with the boundary lines of sedimentary cycles.
6.2.2.1.2 Sand Layer Group Division
6.2.2.1.2.1 Adjacent sandstone-rich intervals within an oil layer group are divided into a sand layer group. A sand layer group may contain several sub-layers.
6.2.2.1.2.2 The number and boundaries of sand layer groups should be unified within the same oil/gas field.
6.2.2.1.3 Sub-layer Division
6.2.2.1.3.1 Within a sand layer group, one or more sand layers separated by non-permeable rock layers above and below are divided into a sub-layer.
6.2.2.1.3.2 The number and boundary divisions of sub-layers should be consistent across different blocks. Strata deposited during the same period can correlate sandstone with mudstone.
6.2.2.2 Fine Stratigraphic Correlation
6.2.2.2.1 Marker Bed Selection
6.2.2.2.1.1 Rock strata with stable lithology, prominent characteristics, wide distribution, easily identifiable log shapes, and isochronous significance shall be selected as correlation marker beds. Commonly used marker beds include special rock layers such as fossil beds, oil shale, carbonaceous shale, limestone, dolomite, and mudstone.
6.2.2.2.1.2 Intervals with obvious lithological association characteristics, easily identifiable log shapes, or distinct upper/lower differences that have isochronous significance should be selected as correlation marker beds or surfaces.
6.2.2.2.1.3 Select correlation marker beds near sedimentary cycle boundaries and lithofacies change boundaries.
6.2.2.2.1.4 Identify auxiliary marker beds distributed locally.
6.2.2.2.2 Establishment of Reference Correlation Section
6.2.2.2.2.1 Based on the area of the correlation region and the planar stability of hydrocarbon layers, establish one or several reference stratigraphic correlation sections in different directions (parallel to and perpendicular to the sediment source direction).
6.2.2.2.2.2 The reference correlation section should traverse the entire correlation area. Cored wells should be included as wells or intervals within the reference correlation section. The sedimentary sequence should have no stratigraphic repetition or omission. For complex fault blocks with significant stratigraphic omission, multiple wells should be selected as corresponding reference wells by block or sand layer group based on actual conditions.
6.2.2.2.2.3 Determine the layer boundaries for each well on the reference section through correlation.
6.2.2.2.3 Boundary Correlation and Stratigraphic Harmonization
6.2.2.2.3.1 Based on the layer division results of reference wells, through inter-well correlation, determine the boundaries for oil layer groups, sand layer groups, and sub-layers in other wells, and verify using adjacent wells.
6.2.2.2.3.2 Integrate well and seismic data for correlation to determine fault point depths, fault throw, faulted intervals, etc., in wells, and indicate the corresponding well number.
6.2.2.2.3.3 For blocks with complex stratigraphic contact relationships, integrate well and seismic data to study the unconformity stratigraphic framework, determine the depth, cause, and horizon of stratigraphic omission, and define the reasonable denudation line or onlap line boundary for each sub-layer.
6.2.2.2.3.4 Perform stratigraphic harmonization for individual wells within the block following a specific direction and sequence, ensuring consistency in layer boundaries across all wells in the block.
6.3 Structural Description
6.3.1 Structural Interpretation
Implement according to the provisions of SY/T 5481.
6.3.2 Fault Description
6.3.2.1 Fault Type
Describe the fault type based on the relative movement direction of rock blocks on either side of the fault plane, and the relationship between fault plane attitude and stratum attitude.
6.3.2.2 Fault Elements
Describe fault elements such as fault plane, strike, dip direction, dip angle, fault wall, fault throw/displacement, and fault extension length.
6.3.2.3 Fault Classification and Naming
Classify and name faults based on their relationship with the structure, controlling effect on sedimentation and hydrocarbon distribution, scale, development history, and hierarchical level.
6.3.2.4 Fault Sealing
Describe the lithology of the fault plane and the juxtaposition relationship of strata on both sides of the fault, integrating dynamic test data to describe the sealing properties of various faults.
6.3.3 Description of Structural Form
SY/T 5579.2-2024, SY 5579.2-2024, SYT 5579.2-2024, SY/T5579.2-2024, SY/T 5579.2, SY/T5579.2, SY5579.2-2024, SY 5579.2, SY5579.2, SYT5579.2-2024, SYT 5579.2, SYT5579.2
Introduction of SY/T 5579.2-2024
SY/T 5579.2-2024 Reservoir description method - Part 2 :Fragmental reservoir English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
E
Professional standard of the People's Republic of China
SY/T 5579.2-2024
Replaces SY/T 5579.2-2008
Reservoir description method Part 2: Fragmental reservoir
油藏描述方法 第2部分：碎屑岩油藏
(English Translation)
Issue date: 2024-12-25 Implementation date: 2025-06-25
Issued by National Development and Reform Commission, P.R.C
Contents
Foreword
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Division and Tasks of Reservoir Description Stages
5 Basic Data Required for Reservoir Description
6 Content of Reservoir Description
6.1 Description of Regional Geological Characteristics
6.2 Stratigraphic Division and Correlation
6.3 Structural Description
6.4 Reservoir Description
6.5 Distribution Characteristics of Oil, Gas, and Water
6.6 Fluid Properties
6.7 Reservoir Temperature and Pressure System
6.8 Drive Energy and Drive Type
6.9 Reservoir Type
6.10 Establishment of 3D Geological Model
6.11 Reserve Estimation
6.12 Description of Remaining Oil
7 Requirements for Reservoir Description at Each Development Stage
8 Result Maps and Electronic Documents for Reservoir Description
Reservoir Description Method - Part 2: Clastic Rock Reservoirs
1 Scope
This document specifies the phase division and tasks, basic data, main content, and technical requirements for the description of clastic rock reservoirs.
This document is applicable to the description of clastic rock reservoirs.
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.
DZ/T 0217 Specification for estimation of oil and natural gas reserves
SY/T 5358 Evaluation method for reservoir sensitivity flow experiment
SY/T 5368 Identification of rock thin section
SY/T 5481 Technical specification for structural interpretation of seismic data
SY/T 5523 Analysis method for oilfield water
SY/T 5579.1 Reservoir description method – Part 1: General principles
SY/T 6169 Reservoir classification
SY/T 7378 Technical specification for establishing 3D quantitative geological model of oil and gas reservoirs
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
sedimentary cycle
A sequence of sedimentary strata that reflects regular changes in the sedimentary environment, characterized by a vertically recurring succession of depositional patterns.
3.2
reservoir architecture
The geometry, scale, orientation, and stacking relationships of reservoir constituent units at different hierarchical levels.
Note: Also referred to as reservoir building structure, including reservoir bounding surfaces at different hierarchical levels and the geological bodies formed in different geological periods separated by these surfaces.
4 Division and Tasks of Reservoir Description Stages
Implement according to the provisions of SY/T 5579.1.
5 Basic Data Required for Reservoir Description
Implement according to the provisions of SY/T 5579.1.
6 Content of Reservoir Description
6.1 Description of Regional Geological Characteristics
Implement according to the provisions of SY/T 5579.1.
6.2 Stratigraphic Division and Correlation
6.2.1 Regional Stratigraphic Division and Correlation
Implement according to the provisions of SY/T 5579.1.
6.2.2 Fine Stratigraphic Division and Correlation
6.2.2.1 Fine Stratigraphic Division
6.2.2.1.1 Oil Layer Group Division
6.2.2.1.1.1 Intervals with relatively similar depositional environments, distribution patterns, rock properties, physical characteristics, and hydrocarbon properties shall be divided into one oil layer group. An oil layer group may consist of one or several sand layer groups.
6.2.2.1.1.2 Oil layer groups shall be separated by relatively thick and stably distributed interlayers. The boundary lines should align with the boundary lines of sedimentary cycles.
6.2.2.1.2 Sand Layer Group Division
6.2.2.1.2.1 Adjacent sandstone-rich intervals within an oil layer group are divided into a sand layer group. A sand layer group may contain several sub-layers.
6.2.2.1.2.2 The number and boundaries of sand layer groups should be unified within the same oil/gas field.
6.2.2.1.3 Sub-layer Division
6.2.2.1.3.1 Within a sand layer group, one or more sand layers separated by non-permeable rock layers above and below are divided into a sub-layer.
6.2.2.1.3.2 The number and boundary divisions of sub-layers should be consistent across different blocks. Strata deposited during the same period can correlate sandstone with mudstone.
6.2.2.2 Fine Stratigraphic Correlation
6.2.2.2.1 Marker Bed Selection
6.2.2.2.1.1 Rock strata with stable lithology, prominent characteristics, wide distribution, easily identifiable log shapes, and isochronous significance shall be selected as correlation marker beds. Commonly used marker beds include special rock layers such as fossil beds, oil shale, carbonaceous shale, limestone, dolomite, and mudstone.
6.2.2.2.1.2 Intervals with obvious lithological association characteristics, easily identifiable log shapes, or distinct upper/lower differences that have isochronous significance should be selected as correlation marker beds or surfaces.
6.2.2.2.1.3 Select correlation marker beds near sedimentary cycle boundaries and lithofacies change boundaries.
6.2.2.2.1.4 Identify auxiliary marker beds distributed locally.
6.2.2.2.2 Establishment of Reference Correlation Section
6.2.2.2.2.1 Based on the area of the correlation region and the planar stability of hydrocarbon layers, establish one or several reference stratigraphic correlation sections in different directions (parallel to and perpendicular to the sediment source direction).
6.2.2.2.2.2 The reference correlation section should traverse the entire correlation area. Cored wells should be included as wells or intervals within the reference correlation section. The sedimentary sequence should have no stratigraphic repetition or omission. For complex fault blocks with significant stratigraphic omission, multiple wells should be selected as corresponding reference wells by block or sand layer group based on actual conditions.
6.2.2.2.2.3 Determine the layer boundaries for each well on the reference section through correlation.
6.2.2.2.3 Boundary Correlation and Stratigraphic Harmonization
6.2.2.2.3.1 Based on the layer division results of reference wells, through inter-well correlation, determine the boundaries for oil layer groups, sand layer groups, and sub-layers in other wells, and verify using adjacent wells.
6.2.2.2.3.2 Integrate well and seismic data for correlation to determine fault point depths, fault throw, faulted intervals, etc., in wells, and indicate the corresponding well number.
6.2.2.2.3.3 For blocks with complex stratigraphic contact relationships, integrate well and seismic data to study the unconformity stratigraphic framework, determine the depth, cause, and horizon of stratigraphic omission, and define the reasonable denudation line or onlap line boundary for each sub-layer.
6.2.2.2.3.4 Perform stratigraphic harmonization for individual wells within the block following a specific direction and sequence, ensuring consistency in layer boundaries across all wells in the block.
6.3 Structural Description
6.3.1 Structural Interpretation
Implement according to the provisions of SY/T 5481.
6.3.2 Fault Description
6.3.2.1 Fault Type
Describe the fault type based on the relative movement direction of rock blocks on either side of the fault plane, and the relationship between fault plane attitude and stratum attitude.
6.3.2.2 Fault Elements
Describe fault elements such as fault plane, strike, dip direction, dip angle, fault wall, fault throw/displacement, and fault extension length.
6.3.2.3 Fault Classification and Naming
Classify and name faults based on their relationship with the structure, controlling effect on sedimentation and hydrocarbon distribution, scale, development history, and hierarchical level.
6.3.2.4 Fault Sealing
Describe the lithology of the fault plane and the juxtaposition relationship of strata on both sides of the fault, integrating dynamic test data to describe the sealing properties of various faults.
6.3.3 Description of Structural Form
