Erratum,Geophysical Prospecting

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Erratum
Geophysical Prospecting ( IF 1.8 ) Pub Date : 2021-05-16 , DOI: 10.1111/1365-2478.13095

In Dias et al. (2021), the following errors were published on pages 672, 673, 674, 675 and 676.

The labels for the vertical range of Figures A1 (a‐i), A2 (b, e, c, f‐i), A3 (b, e, c, f‐i), A4 (b, c, e, f, h, i) and A5 (b, c, e, f, h, i) were incorrectly changed to “V_p,V_s (m/s)”.

The titles of the cross‐plots in Figure A5 (c, f, i) were wrongly indicated as “Elastic Trends Evaluation ‐ Well A”.

**Figure A1**
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Petroelastic trends evaluation for Well B, C and E: $V_{p}$ versus TCMR crossplots containing petroelastic trends of reservoir and non‐reservoir units with the NMR index, water saturation ( $S_{w}$ ) and CBW porosity values in the colourbars. Analysing and comparing all the crossplots, we clearly see the NMR index is a good indicator to disentangle the stiffer, oil‐saturated and macroporous petroelastic trends (reservoir units) from the softer, water‐saturated and microporous petroelastic trends (non‐reservoir units).

**Figure A2**
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Elastic and petroelastic trends evaluation for Well A: $V_{p}$ versus TCMR, $V_{p}$ / $V_{s}$ versus AI and $V_{p}$ versus $V_{s}$ crossplots containing elastic and petroelastic trends of reservoir and non‐reservoir units with the NMR index, water saturation ( $S_{w}$ ) and CBW porosity values in the colourbars. Analysing and comparing all the crossplots, we clearly see the NMR index is a good indicator to disentangle the stiffer, oil‐saturated and macroporous elastic and petroelastic trends (reservoir units) from the softer, water‐saturated and microporous elastic and petroelastic trends (non‐reservoir units).

**Figure A3**
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Elastic and petroelastic trends evaluation for Well D: $V_{p}$ versus TCMR, $V_{p}$ / $V_{s}$ versus AI and $V_{p}$ versus $V_{s}$ crossplots containing elastic and petroelastic trends of reservoir and non‐reservoir units with the NMR index, water saturation ( $S_{w}$ ) and CBW porosity values in the colourbars. Analysing and comparing all the crossplots, we clearly see the NMR index is a good indicator to disentangle the stiffer, oil‐saturated and macroporous elastic and petroelastic trends (reservoir units) from the softer, water‐saturated and microporous elastic and petroelastic trends (non‐reservoir units).

**Figure A4**
Open in figure viewerPowerPoint

Elastic and petroelastic trends evaluation for Well A: $V_{p}$ versus TCMR, $V_{p}$ / $V_{s}$ versus AI and $V_{p}$ versus $V_{s}$ crossplots containing elastic and petroelastic trends of the reservoir unit with VCAR, VQFM and VCLAY values in the colourbars. Analysing and comparing all the crossplots, we see carbonate is the predominant mineral but quartz is also present, for high and low porosity values, quartz volumes in the order of 40% to 50% can be found, in general the reservoir has around 20% to 25% of quartz in its matrix by analysing only these crossplots. The volume of clay is low, in the order of 2%.

**Figure A5**
Open in figure viewerPowerPoint

Elastic and petroelastic trends evaluation for Well D: $V_{p}$ versus TCMR, $V_{p}$ / $V_{s}$ versus AI and $V_{p}$ versus $V_{s}$ crossplots containing elastic and petroelastic trends of the reservoir unit with VCAR, VQFM and VCLAY values in the colourbars. Analysing and comparing all the crossplots, we see carbonate is the predominant mineral but quartz is also present, mainly for low porosity values, quartz volumes in the order of 40% to 50% can be found, in general the reservoir has around 20% to 25% of quartz in its matrix by analysing only these crossplots. The volumes of clay are even lower, if we compare these petroelastic trends with Well A counterparts.

The labels for the affected vertical range should be “V_p (m/s)” and “V_p/V_s” accordingly. As such, the x‐axes in Figures A2 (b, e), A3 (b, e), A4 (c, f, i) and A5 (c, f, i) should be V_s (m/s). The titles of the cross‐plots in Figure A5 (c, f, i) should be “Elastic Trends Evaluation ‐ Well D”. The corrected version of the Figures is shown below.