... rocks a workflow is detailed with the purpose of detecting the upscaling limits highlighting the possible errors that might appear in the upscaling process. A counterintuitive result is that in the transition zone (the focus of this work) permeable rocks are more prone to errors than the less permeable...

... 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...

... formation well logging oil zone july 29 transition zone stationary measurement halliburton nmr fluid university spwla 61 june 24 pumpout petrophysicist SPWLA 61st Annual Logging Symposium, June 24 to July 29, 2020 1 AN INTEGRATED PETROPHYSICAL WORKFLOW FOR FLUID CHARACTERIZATION AND CONTACTS...

... are studied and shown to be the rock quality and relative permeability. Counterintuitively, the perching effect is not going to feature in poor quality rocks (sub-milli Darcy permeability) – the effects would be visible only for a considerable barrier height. Regarding transition zones, the results show...

... in the oil-producing interval. The new approach was based on performing mini-DSTs in the free-water, oil, and oil/water transition zones. Analyses of the mini-DST buildup tests provided absolute formation permeability, end point of relative permeability to both oil and water, and curvature of the relative...

... mostly be placed above the transition zone, making the accuracy of the conventional models for saturation resistivity versus height above OWC uncertain. To improve the accuracy of horizontal wellbore placement relative to the OWC, recently developed azimuthal propagation resistivity (APR) measurements...

... transition zone optimization problem viscosity constituent Saudi Aramco Artificial Intelligence formation tester application fraction interpretation reservoir viscosity estimation heavy oil log analysis Upstream Oil & Gas porosity Symposium spwla 50 equation viscosity transform...

... Upstream Oil & Gas filtrate formation testing port upper port sensor log analysis resistivity sensor water sample pumpout resistivity contamination gradient analysis fluid density formation water lower port well logging transition zone Symposium spwla 49th dual port sp...

... Abstract Worldwide, carbonate oil-water transition zones contain vast amounts of producible oil. Yet, traditional approaches to open-hole formation evaluation often fail to predict how much oil should flow from them, or even the location of the free water levels. A theory applying capillary...

... resistivity pay well logging transition zone log analysis carbonate interpretation Saturation Evaluation sigma measurement hydrocarbon resistivity gradient equation evaluation saturation Archie invasion water saturation Symposium resistivity measurement reservoir spwla 47 SPWLA 47th...

... in the Grane field in the North Sea. The objectives were to stay at a specific distance above the oil water contact, and to detect and possibly avoid shales. Data from offset wells indicate an irregular oil water transition zone in the field. However, the cause of this variation is not apparent from other...

... Thickness siderite vertical appraisal well log analysis modeling transition zone sequence prejob modeling Upstream Oil & Gas water saturation OWC Symposium wireline log anisotropy resistivity spwla 41 TVD appraisal well SPWLA 41 Annual Logging Symposium, June 4-7,200O GEOSTEERING...

... Upstream Oil & Gas bed boundary detection transition zone algorithm log analysis resolution bed boundary boundary well logging borehole measurement Baker Atlas bed boundary algorithm vertical resolution interpretation spwla 41 frequency integration algorithm instrument...

... chosen for the phase cut. Transition Invabon. In the previous exa.mples, the boundary between the invaded zone and the formation was modeled as a single step. Invasion may also be modeled as a gradual transition zone as shown in Fig. 13. This situation is probably closer to reality than step invasion...

... profile along the core shows a wide transition zone. Only the first inch or two of the core was completely flushed. The transition zone is much larger than that obtained with a miscible displacement at constant rate. Since invasion rate decreases by a factor of 10 over the course of the experiment...

... kHz Upstream Oil & Gas formation water relative error separation transition transition zone conductivity resistivity invasion SPWLA Twenty-Ninth Annual Logging Symposium, June 5-8, 1988 THE EFFECT OF TRANSITION ZONES ON THE RESPONSE OF INDUCTION LOGS Julian M. Singer Schlumberger Well...

... and analysis, several researchers found as many as half of the reservoirs either strongly oil wet or of mixed or fractional nettability [5, 6]. Several publications mention the vertical pressure variation in the transition zone of water wet reservoir mainly in the context of finding the free water level [7, 8...

... crossection pipe pressure gradient production control Upstream Oil & Gas multi phase vertical flow impeller rotation flowmeter response installation density increase production monitoring superficial gas velocity transition zone Spwla Twentieth vertical flow sonde Reservoir Surveillance...

... in the past. For intervals indicated to be above the transition zone, the computed values of porosity and water saturation can be used in an empirical method to determine the permeability of the interval. Then, augmented by knowledge of formation pressure, and fluid viscosities and volume factors, these data...

... transition zone elevation water saturation transit time porosity log interpretation interpretation reservoir resistivity water leg Induction log oil water contact saturation complex devonian reef reservoir water saturation profile LARGE-SCALE LOG INTEXXPR.STATIONS OF WATRR SATURATION FOR TWO...