Figure 4 Response of DLL (shallow) to a thin, noninvaded bed. More

Figure 5 Response of DLL (deep) to a thin, noninvaded bed. More

Figure 6 Response of the DLL to many noninvaded beds. More

Figure 7 Response of DLL (shallow) to a thin, noninvaded bed. More

Figure 8 Response of DLL (deep) to a thin, noninvaded bed. More

Figure 9 Response of the DLL to invasion-physical configuration. More

Figure 1 Sketch of a Dual Laterolog (DLL) tool (after Schlumberger, 1991 ). More

Figure 2 Comparison of the fracture porosity and aperture calculated from the DLL log with those derived from FMI log in the well under study. More

Figure 8 Distribution histogram of the calculated fracture porosity by the DLL in the well under study. More

Fig. 6 Numerical simulation of DLL measurements for well BOR-12. The left-hand side panel shows field (dashed line) and simulated (continuous line) resistivity curves for the case of permeability obtained from rock-core measurements. The right-hand side panel shows field (dashed line) and simulate... More

Fig. 11 Numerical simulation of DLL measurements in well BOR-11. The left-hand side panel shows field (dashed line) and simulated (continuous line) apparent resistivity curves for the case of permeability estimated from well-log correlations. The right-hand side panel shows field (dashed line) and... More

Fig. 17 Numerical simulation of HRLA as DLL resistivity logs in well BOR-31. The left-hand side panel shows field (dashed line) and simulated (continuous line) apparent resistivity curves for the case of permeability obtained from rock-core measurements. The right-hand side panel shows field (dash... More

Figure 7 Diagram showing the top view of the DLL completion More

Figure 6 Raw MLL, DLL, LWD logs and eight HDLL Software Focused Resistivity (SFR) logs for the interval 8550-8750 ft (well W-1, Malaysia). The plot shows a close resemblance between the DLL and SFR logs. The wide separation between the MLL-SFR-LWD logs indicates presence of a deep invasion. More

Figure 10 Raw MLL, DLL, LWD logs and eight HDLL Software Focused Resistivity (SFR) logs for the interval 7665-7825 ft (well W-1, Malaysia). The narrow separation between the MLL-SFR-LWD logs indicates presence of a relatively shallow invasion. More

Fig. 17 Open hole logs resistivity from LWD, and partial DLL-MSFL/GR. NPHI case hole with environmental correction from Iride 1156 (Application Well). More

Fig. 2 Synthetic DLL logs (central track) and SFR curves (right track). The figure demonstrates both radial and vertical resolution of the SFR curves More

Fig. 9 Software-Focused Resistivity curves and DLL data for the interval 650 – 1200 ft (highly deviated well ELOH, North Sea). More

Figure 2a Apparent resistivities of the DLL and Multi Laterolog tools in a thick bed as a function of invasion radius. More