Fig. 3 Red ellipse—conventional MSA correction, green ellipse—multirun MSA correction. More

Fig. 9 MSA performance comparison: red ellipse—conventional MSA, blue ellipse—standard MWD toolcode, green ellipse—proposed MSA. More

Figure 2 The comparison of the results of the conventional MSA and the improved MSA corrections. More

Fig. 5 No-go zones for the conventional and multirun MSA algorithms. More

Fig. 10 Correlation of the MSA corrections reduces the relative wellbore positional uncertainty. More

Fig. 6 West Texas laterals. MWD + IFR2 + MSA + Sag 2 σ ‐EOUs. More

Fig. 7 Minimum distance scan based on the MWD + IFR2 + MSA + Sag 2 σ ‐EOUs between the reference well (blue) and the comparison well (orange) in Fig. 6 . More

Fig. 8 MWD + IFR2 + MSA + Sag 2 σ uncertainty (blue, red, and orange ellipses). More

Fig. 9 MWD + IFR2 + MSA + Sag 2 σ uncertainty vs. relative ranging uncertainty (green cylinders). More

Fig. 10 MWD + IFR2 + MSA + Sag 2 σ uncertainty vs. relative ranging uncertainty at the end of the curve. More

Fig. 4 Flow chart of remove-and-restore algorithm in VR-MSA. More

Fig. 7 Calculated total magnetic field (green) vs. VR-MSA corrected total magnetic field (red) and the reference value of total magnetic field (black) for Case Study 1. Magf = magnetic field. More

Fig. 8 Calculated magnetic dip angle (green) vs. VR-MSA corrected magnetic dip angle (red) and the reference value of magnetic dip angle (black) for Case Study 1. More

Figure 5 Colonies from an aliquot of first enrichment grown on MSA (A-I), BHA (J-R) More

Figure 6 Colonies from an aliquot of second enrichment grown on MSA (A-I), BHA (J-R) More

Figure D-1 The various steps involved in the application of the MSA-requirements. More

Fig. 3 Cumulative oil produced by few wells from Sarmatian Margineni (MSA) and from Meotian Margineni (MME) during first production period and after field revitalization. More

Figure 14 Combined impact of sag, IFR and MSA corrections over the Well #2 More

Figure 8 MSA-Ellipses of Uncertainty More

Comparison of MSA Post-Fit Position Uncertainty on ISCWSA Test Well #2 with Standard Error Model ( Table 2 ) and Reduced Uncertainty Error Model ( Table 4 ). (a) 1σ Horizontal Position Uncertainty vs. Measured Depth. (b) Final 1σ Position Uncertainty in High-Side Frame. More