| Name | R_Reserve_Classification |
|---|---|
| Entity Type | Table |
| Description | A reference table for classifying reserve estimates. The classification includes an expression of the level of confidence or probability of the reserve quantity. Examples are "Proven" (1P), "Probable" (2P), and "Possible" (3P). Proved reserves are those which, by analysis of geological and engineering data, can be estimated to be commercially recoverable from known reservoirs under current economic conditions, operating methods, and government regulations. Probable reserves are those unproved reserves which analysis suggests are more likely than not to be recoverable (at least a 50% probability). Possible reserves are those unproved reserves which are less likely to be recoverable than probable reserves (at least a 10% probability). The classification is further qualified through the use of flags indicating if the reserves are developed or not and, if developed, whether producing or not. |
| Submodel | Reserves |
| Entity Scope | Reference |
| Primary Key | Code |
| Natural Key | Code |
| Generalizations | Reference_Entity , Reference_Entity_Parent |
| Specializations |
| Name | Value Domain | Property / Storage Unit | Description | Required / Default | Type |
|---|---|---|---|---|---|
| Active_Flag | boolean | NA |
1 = use without restriction. 0 = avoid use - the value has been deprecated and may be removed in a later release. | Yes 1 |
NUMBER(1) |
| Code | CODE | NA |
A standard abbreviation, mnemonic, or short code that represents the reference value. | Yes |
VARCHAR2(64) |
| Confidence_Level | CODE | NA |
An expression of the level of confidence or probability of the reserve quantity. Typical values are "Proven" (1P), "Probable" (2P), and "Possible" (3P). The category is determined by analysis of geological and engineering data. Proved reserves are those which can be estimated with reasonable certainty to be commercially recoverable from known reservoirs under current economic conditions, operating methods, and government regulations. Probable reserves are those unproved reserves which analysis shows are more likely than not to be recoverable. In this context, there should be at least a 50% probability that the quantities actually recovered will equal the sum of estimated proved plus probable reserves. Possible reserves are those unproved reserves which are less likely to be recoverable than probable reserves. There should be at least a 10% probability that the quantities actually recovered will equal the sum of estimated proved, plus probable, plus possible reserves. | No |
VARCHAR2(64) |
| Description | STRING2000 | NA |
A textual definition of the reference value. | No |
VARCHAR2(2000) |
| Developed_Flag | boolean | NA |
A flag indicating a Developed production entity. If the flag is True (1), the material is expected to be recovered through existing wells and facilities and by existing operating methods. If the flag is False (0), the material is expected to be recovered: (1) from new wells on undrilled acreage, (2) from deepening existing wells to a different reservoir, or (3) where a relatively large expenditure is required to (a) recomplete an existing well or (b) install production or transportation facilities for primary or improved recovery projects. Developed reserves may be sub-categorized as producing or non-producing (See Production Flag). | No |
NUMBER(1) |
| Insert_Date | DATE | NA |
Date the entity was created in the repository | No |
DATE |
| Insert_User | STRING64 | NA |
The name of the user responsible for the creation of this entity in the repository. | No |
VARCHAR2(64) |
| Name | STRING255 | NA |
The spelled-out name of the reference value. | No |
VARCHAR2(255) |
| Production_Flag | boolean | NA |
A flag indicating the reserves are for a Producing entity. This flag applies only within the context of a classification for which the Developed Flag is True (1). Ignore this flag when the Developed flag is False (0). When True (1), the production material is expected to be recovered from completion intervals which are open and producing at the time of the estimate. When False (0), the production entity is non-producing. Reserves subcategorized as non-producing include shut-in and behind-pipe reserves. Shut-in reserves are expected to be recovered from (1) completion intervals which are open at the time of the estimate, but which have not started producing, (2) wells which were shut-in for market conditions or pipeline connections, or (3) wells not capable of production for mechanical reasons. Behind-pipe reserves are expected to be recovered from zones in existing wells, which will require additional completion work or future recompletion prior to the start of production. | No |
NUMBER(1) |
| Source | CODE | NA |
The person, company or application that defined or specified the data (content) for this instance and is considered to be responsible for it. For example, POSC, EPSG, API, ISO, etc.. | No |
VARCHAR2(64) |
| Update_Date | DATE | NA |
Date of the most-recent modification to the entity. | No |
DATE |
| Update_User | STRING64 | NA |
The name of the user responsible for the last modification to this entity. | No |
VARCHAR2(64) |
| From Entity | Link | Description | Implementation Technique | Required |
|---|---|---|---|---|
| Reserve_Entity_Class | Reserve_Classification | A code, name, or mnemonic that identifies the classification of the reserve entity. The classification includes a level of confidence or probability of the reserve quantity such as "Proven", "Probable", and "Possible". It also includes an indication of Developed or not. If Developed then the Production flag indicates whether the reserves are for producing entities or not. | Restrict | Yes |