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Keywords: filtrate
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Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0127
... fluid with the mud filtrate used while drilling. While immiscible fluids can easily be differentiated and tracked, miscible fluids make it difficult to quantify the fraction of mud filtrate in the mixture. Until recently, the cleanup trend in miscible fluids was thought to be along a power law curve...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5021
... a focused water-sampling station in a transition zone in a well drilled with water-based mud (WBM). The resistivity contrast between the mud filtrate and the formation water is low and mobile oil mixes with the formation water and mud filtrate. Despite these difficult conditions, the downhole measurement...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-AAA
... ABSTRACT Nuclear magnetic resonance (NMR) is the key petrophysical evaluation technology in Brazil's deep water Aptian stromatolytic carbonate reservoirs. As such, it is extremely important to obtain accurate fluid typing volumetric fractions of water, oil, and oil-based-mud filtrate (OBMF...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-LLLL
... ABSTRACT It is well known that the acquisition of representative formation fluid samples is essential for reservoir management and development. However, because of overbalance pressure in the mud column, mud filtrate invades and contaminates the reservoir fluid during the drilling process...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-VVV
... log analysis Artificial Intelligence numerical simulation filtrate Upstream Oil & Gas Prediction error relative permeability inversion interpretation optimization problem spwla 59 Probe saturation well logging Simulation watercut radial probe commingle permeability...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-EE
... (WBM) filtrate contamination of hydrocarbon or water samples is still one of the biggest challenges, both during real-time formation tester sampling operations and with surface laboratory techniques. Laboratory sample analysis uses either the skimming or the subtraction method to quantify OBM filtrate...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-HHHH
... equation of state formation tester formation testing drilling fluid formulation ambiguity contamination level filtrate eos fingerprint compartmentalization MCR pumpout spwla 58 estimation composition Symposium Formation Fluid contamination similarity index ABSTRACT For formation...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-MM
... there is clear indication of hydrocarbons as well as favorable mobility. When a seal is established with the reservoir wall, continuous pumping of the mud filtrate occurs until virgin formation fluid is detected. The formation fluid is redirected to and captured in sample chambers. Once at the surface...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-CCCC
... to additional effects as discussed in other paragraphs of this section. Fig. 9 NMR- (top) versus resistivity-based fluid volumetrics (bottom) for a transition zone in case NMR separates movable water and hydrocarbon volumes. A very important effect to be considered is the invasion of mud filtrate...
Proceedings Papers

Paper presented at the SPWLA 56th Annual Logging Symposium, July 18–22, 2015
Paper Number: SPWLA-2015-II
... Abstract Accurate quantification of oil-based mud (OBM) filtrate contamination of hydrocarbon samples is still one of the biggest challenges in fluid sampling with formation testers. Existing techniques apply only to a very limited combination of probe type and formation fluid type...
Proceedings Papers

Paper presented at the SPWLA 54th Annual Logging Symposium, June 22–26, 2013
Paper Number: SPWLA-2013-DDD
.... When sampling formation water or hydrocarbons with wireline formation testers (WFT) in wells drilled with WBM and SBM respectively, it is important to track mud filtrate contamination by distinguishing between formation fluid and mud filtrate. Among the DFA techniques that have been recently used...
Proceedings Papers

Paper presented at the SPWLA 53rd Annual Logging Symposium, June 16–20, 2012
Paper Number: SPWLA-2012-092
... and therefore bound to span a limited range of properties. well logging waterwet correlation variable cutoff saturation reservoir log analysis cutoff calibration modeling in-situ condition prediction sw 1 wettability Upstream Oil & Gas NMR response NMR log filtrate interpretation...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-GGG
... log analysis Upstream Oil & Gas spwla 52 well logging log mean viscosity filtrate fluid sample real time system equation of state akkurt contamination estimation Symposium contamination sample chamber sensor Standard Deviation algorithm fluid density fluid modeling PVT...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-WWW
..., the invading brine moves into the forma- tion with a distribution of speeds, creating a volume where some fraction of the brine is connate water and the remaining fraction is mud filtrate. As the fraction varies from 0 to 1, the salinity of the fluid varies from mud filtrate to connate water in the invaded...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-GG
.... In practice one of the least understood components (by petrophysicists) is the drilling fluid or "mud", and its potential effects on the petrophysical measurements of the surrounding formations. well logging Upstream Oil & Gas particle filtrate correction drilling fluid selection...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-74900
... mineralogies, formation fluids, and reservoir quality are present in the four formations. In wells drilled with oil-based mud (OBM), filtrate invasion complicates the identification of light to medium native oil. OBM invasion may also hinder core analysis as a result of dehydration and wettability alteration...

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