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Probabilistic and Deterministic Methods: Applicability in Unconventional Reservoirs

Reserves- and resources-evaluation methods in unconventional reservoirs are different from those for conventional reservoirs. Depending on the phase of the resource play, a deterministic, probabilistic, or hybrid method may be required, with the most effective method evolving from deterministic toward probabilistic as the resource play moves from the early phase to the mature phase. To define the best method to use in a particular area, the evaluator should first identify the phase of the resource play and evaluate the amount of data available.

Introduction

For unconventional reservoirs, classification systems similar to those for conventional reservoirs can be used (Fig. 1). These systems include prospective resources, estimated contingent resources at discovery, followed by reserves, with maturation linked to the phases of the resource play.

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper SPE 164820, “Probabilistic and Deterministic Methods: Applicability in Unconventional Reservoirs,” by C. Coll, SPE, and S. Elliott, BG, prepared for the 2013 EAGE Annual Conference and Exhibition/SPE Europec, London, 10–13 June. The paper has not been peer reviewed.
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Probabilistic and Deterministic Methods: Applicability in Unconventional Reservoirs

01 December 2013

Volume: 65 | Issue: 12

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