Unproven Reserves
Reserves may be estimated based on probabilistic methods and Table 6.2 is a high level guideline of such probabilities as they may be applied to reserves. Again, there is a significant amount of geological, legal, and technical testing to assess probabilities and official certification to reserves. Probabilistic methods include other guidance. Visit www.spe.org for technical definitions.
Table 6.2 Reserves by Recovery Probability
Source: U.S. Securities and Exchange Commission.
| Reserves by Type | Recovery Probability |
| 1P | 90% |
| 2P | 50% |
| 3P | 10% |
Unproven reserves are based upon geological and engineering data, similar to that used in estimates of proven reserves, but technical, contractual, or regulatory uncertainties preclude ...
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