国际储量上很常见的概念:以下是SPE/AAPG/WPC/SPEE联合颁布的PRMS(类似的相当于国际储量规范)中的原文,说的很清楚。SEC的界定与PRMS的基本一致。
Range of Uncertainty
The range of uncertainty of the recoverable and/or potentially recoverable volumes may be represented
by either deterministic scenarios or by a probability distribution .
When the range of uncertainty is represented by a probability distribution, a low, best, and high
estimate shall be provided such that:
1. There should be at least a 90% probability (P90) that the quantities actually recovered will equal or
exceed the low estimate.
2.There should be at least a 50% probability (P50) that the quantities actually recovered will equal or
exceed the best estimate.
3. There should be at least a 10% probability (P10) that the quantities actually recovered will equal or
exceed the high estimate.