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Proceedings Papers

Paper presented at the 2001 SEG Annual Meeting, September 9–14, 2001
Paper Number: SEG-2001-0381
... ABSTRACT Accurate resistivity data (often referred to as true resistivity, Rt) are required in the calculation of hydrocarbon pore volume and reserves from well logs. The apparent resistivity (often referred to as Ra) measured by a resistivity tool, such as a Dual Laterolog tool (DLL...
Images
Images
Comparison of the fracture porosity and aperture calculated from the <b>DLL</b> lo...
Published: 26 January 2015
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
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Distribution histogram of the calculated fracture porosity by the <b>DLL</b> in th...
Published: 26 January 2015
Figure 8 Distribution histogram of the calculated fracture porosity by the DLL in the well under study. More
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Proceedings Papers

Paper presented at the SPE Middle East Unconventional Resources Conference and Exhibition, January 26–28, 2015
Paper Number: SPE-172947-MS
...Figure 1 Sketch of a Dual Laterolog (DLL) tool (after Schlumberger, 1991 ). ...
Journal Articles
Petrophysics 32 (06).
Paper Number: SPWLA-1991-v32n6a3
Published: 01 November 1991
...D.L. Hoyer A technique to quantify natural fracture porosity in coalbeds using the dual-laterolog tool (DLL) has been developed. The magnitude of fracture porosity is directly related to reservoir permeability and the viability of a coalbed-methane recovery project. Although induction as well...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 1–4, 2000
Paper Number: SPE-62912-MS
... Abstract The conventional dual laterolog (DLL) instrument, providing valuable information on formation resistivities, has been used in the petroleum industry for many years. However, in many situations, physical limitations of the DLL (e.g., limited vertical resolution, poor radial resolution...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, December 3–5, 2008
Paper Number: IPTC-12307-MS
... and laterolog charts in conjunction with the extent of conductivity of drilling fluid are used to decide whether Dual Induction Log (DIL) or Dual Laterolog (DLL) tools to be employed. In numerous gas reservoirs of Iran, water-based drilling fluids with low conductivity (salinity) are used to drill...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–24, 2008
Paper Number: SPE-114704-MS
... Abstract The Dual Laterolog (DLL) is one of the most commonly used resistivity logging devices in environments with highly conductive (salt-saturated) drilling mud and high formation resistivity. However, this device produces only two apparent resistivity logs with different radial depths...
Proceedings Papers

Paper presented at the SPWLA 42nd Annual Logging Symposium, June 17–20, 2001
Paper Number: SPWLA-2001-FFF
... Laterolog (DLL), and Micro Laterolog (MLL) resistivity logs. To accurately describe the formation resistivity structures around the wellbores, two-dimensional (2-D) earth models were used. The mud resistivity value (Rm) was estimated after performing an inversion of the shallow HDLL logs over a short...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2001
Paper Number: OTC-13076-MS
... in a Shellcreated DLL while benefiting from a new graphical user interface (GUI) in a commercial package. The separate DLL protects the simulation method and allows for future upgrades to the model, without hampering the functionality of PIPESIM . By combining internal research with commercially available...
Proceedings Papers

Paper presented at the SPWLA 39th Annual Logging Symposium, May 26–28, 1998
Paper Number: SPWLA-1998-C
... dual laterolog (DLL) technology (restricted vertical resolution, artefacts in deviated boreholes), The new tool has a single current-injection electrode and 18 potential measurement electrodes at various distances from the injection electrode. The tool measures absolute potentials and first differences...
Journal Articles
J Pet Technol 34 (11): 2673–2682.
Paper Number: SPE-9857-PA
Published: 01 November 1982
..., WY. The technique uses the response characteristics of the two resistivity curves from the Dual Later log (TM) (DLL) service to locate the fractured intervals and to identify the fluid type within the fractures. Example logs and cross plots are shown. Introduction Several log measurements...
Proceedings Papers

Paper presented at the SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-56708
... A newly developed array laterolog device, the Multi Laterolog (RT Explorer, RTeX SM ), is based on the Dual Laterolog (DLL) principle, but with four independent focused measurements. This device is shorter than the traditional DLL and provides enhanced vertical resolution. A hardware-based...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1174
... on the aerodynamic torque, but to the aerodynamic thrust as well. The present work aims at showing the potential of combining existing lidar feedforward techniques to FOWTs: A standardized DLL-chain that is directly applicable on commercial wind tur- bine systems are used in this work and simulated for a 10 MW FOWT...
Proceedings Papers

Paper presented at the SPWLA 45th Annual Logging Symposium, June 6–9, 2004
Paper Number: SPWLA-2004-YYY
... of well logs was performed by computer program with an algorithm based on a deterministic approach. The set of logging methods included the following conventional logs: SGR, CNL or DSN, SLD or CDL, BHCS, DIL, DLL, MSFL, SED. Core data - well log analysis integration with reference to DST and production...
Proceedings Papers

Paper presented at the 2003 SEG Annual Meeting, October 26–31, 2003
Paper Number: SEG-2003-0557
... SummaryIn 2D formation model, the Finite element method (FEM) is used to simulate the response of different frequencies of complex resistivity well logging(CRWL) which works in Dual Laterolog (DLL) mode. The results show its responses agree with DLL when the frequency is near zero...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 29–October 2, 2002
Paper Number: SPE-77786-MS
... in combination with galvanic tools (Dual Laterolog, DLL and Micro Laterolog, MLL, or array lateral log, HDLL, and MLL) and apply the following sequential data interpretation procedure: Determine the formation resistivity structure of the near wellbore environment and the horizontal resistivity...
Proceedings Papers

Paper presented at the SPE International Petroleum Conference and Exhibition in Mexico, February 1–3, 2000
Paper Number: SPE-58978-MS
.... Apply this IMP require economical resources of 147 million DLLs and in a period of ten years will give us a benefit of 466 millions DLLs. These earnings represent 4% of yearly oil exportation of Mexico. Introduction Since 1996 PEMEX E&amp;P had a organizational restructuring and was created the South...

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