Aggregation of Reserves

Careful consideration is required when combining discrete probability distributions. This is a problem frequently faced in reserves evaluations and has recieved much attention. For example;

But Remaining Proved Reserves are much higher:don't you know how to add up?

Dr Richard Pike, Chief Executive, Royal Society of Chemistry

London SPE Presentation 24 February 2009

Methods for Probabilistic Aggregation of Oil and Gas Field Reserves

SPE Paper 166394

its easy to get it wrong and if you do your results could be misleading.