... in porous media drilling fluid chemistry university saturation invasion mudcake permeability wbm-1 experiment nugget sandstone spwla-2023-0022 austin injection th annual logging symposium spwla 64 texas filtrate simulator ABSTRACT Understanding the behavior of mud-filtrate invasion...

... Wireline or Logging While Drilling (LWD) instruments are the most representative because the reservoir fluid is maintained in single phase all throughout the acquisition. The foremost issue with these samples is the mixing of formation fluid with the mud filtrate used while drilling. While immiscible...

... 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...

... revisited this data, observations made from dielectric, resistivity, and fluid sampling data were overlooked while performing the preliminary standalone NMR interpretation. The Diffusion editing (DE) sequence is useful to separate the formation oil versus oil base mud (OBM) filtrate if there is sufficient...

... log analysis fluid modeling drilling fluid property well logging drilling fluid chemistry drilling fluid selection and formulation equation of state upstream oil & gas concentration filtrate pvt measurement engineering laboratory drilling fluids and materials drilling fluid...

...SPWLA 60th Annual Logging Symposium, June 15-19, 2019 DOI: 10.30632/T60ALS-2019_X 1 DIRECT MID-IR OPTICAL MEASUREMENT OF SYNTHETIC DRILLING FLUID FILTRATE CONTAMINATION DURING FORMATION-TESTER PUMPOUTS Ralph Piazza, Alexandre Vieira, Luiz Alexandre Sacorague (Petrobras), Christopher Jones, Bin Dai...

... 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...

... and development. However, because of overbalance pressure in the mud column, mud filtrate invades and contaminates the reservoir fluid during the drilling process but before the mudcake around the wellbore is properly formed. Although water-based mud (WBM) is immiscible with formation fluid, oil- based mud (OBM...

... and post-job interpretation of formation properties often require a model-based approach, in which parameters of a reservoir model are inverted using downhole fluid analysis (DFA) measurements. The objective of this study is to develop a comprehensive set of forward models of filtrate contamination...

... fluid properties are critical inputs for field development planning. Acquisition of representative, low-contamination, formation fluid samples is key to obtaining accurate fluid properties from laboratory analysis. Quantification of oil-based mud (OBM) or water-based mud (WBM) filtrate contamination...

...SPWLA 58 th Annual Logging Symposium, June 17-21, 2017 1 A NEW MULTISENSOR APPROACH TO DOWNHOLE SAMPLE FILTRATE MEASUREMENT WITH A WIRELINE FORMATION TESTER Bin Dai, Christopher Michael Jones, and Tony van Zuilekom, Halliburton Copyright 2017, held jointly by the Society of Petrophysicists and Well...

... the depth of the mud- filtrate-invaded zone and reduces the pump-out volume to obtain virgin formation fluid. The ideal operation positions the sealing element of the LWD fluid analysis sampling technology in the zone of interest where there is clear indication of hydrocarbons as well as favorable mobility...

... 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...

... 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. The methods can be technique...

.... 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...

... 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...

... 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...

... distances from the instrument's antennas or electrodes. Modeling & Simulation water saturation salinity resistivity profile spwla 52nd well logging Brine instrument Symposium resistivity Upstream Oil & Gas borehole filtrate log analysis invasion correction mud filtrate...

.... 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...

... 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...