Predictability of well construction time with multivariate probabilistic approach

LUU Quang-Hung,LAU Man Fai,NG Sebastian P.H.,TING Clement P.W.,WEE Reuben,THEN Patrick H.H.

Table 2 Statistics of phases of interest available in 192 selected operations in the dataset.

Phase Number of record Duration/days Minimum Maximum Mean Median Variance Skewness Kurtosis CH 49 0.02 0.86 0.35 0.31 0.04 0.54 -0.27 SH 132 0.02 13.83 1.87 1.28 4.23 2.88 11.00 IH 130 0.01 21.17 5.18 4.29 16.94 1.41 2.14 PH 132 0.01 15.31 3.68 3.43 6.59 1.19 2.71 CC 112 0.01 3.06 0.78 0.77 0.27 1.11 2.62 SC 132 0.05 4.65 1.55 1.39 0.70 0.90 1.18 IC 104 0.02 11.08 2.38 2.16 2.46 2.09 8.44 PC 23 0.08 5.42 1.81 1.65 1.78 0.99 0.77