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Statistical Methods for Estimating Petroleum Resources
hand, the LDSCV log-likelihood values show a maximum of 300 when
n = 50 (Fig. 4.7B, right; Table 4.2). The NDSCV log-likelihood values
yield a maximum at 300 when n = 30 (Fig. 4.7C, left; Table 4.3); but when
n = 50, likelihood values show a negative exponential curve (Fig. 4.7C,
right; Table 4.4) and reach a plateau at N ˆ = 300.
Figure 4.7. (A–C) Simulated mixed population of lognormal, Weibull, and
Pareto populations. Discovery sequence (A), and log-likelihood values versus
N value plots derived by LDSCV (B) and NDSCV (C).