... encompass correction for any natural sag of the drill collars, (cross) axial magnetic interference, magnetic mud due to iron filing contamination or mud systems with barite containing iron sulfide, the influences of local crustal anomalies, and lastly for mechanical and thermal stretch correction(s...

... ). One of the crucial steps in tool development is the precise characterization and correction of any wellbore induced effects, in order to ensure accurate and reliable true formation properties to be evaluated, leading to a high confidence in formation properties calculated from them. In this paper we...

... porosity overestimation, which is most significant in unconventional and carbonate reservoirs. The application of the digital twin has allowed us to improve the tool forward modeling accuracy by calculating the correction factors for each combination of T1, T2, pulse sequence, and environment. A new...

... production monitoring upstream oil & gas production logging das united states government reservoir surveillance slug frequency presented technology conference workflow pipe sensor acoustic sensing characterization correction colorado school two-phase slug flow slug production control...

... Abstract Definitive dynamic 6 axis surveys provide continuous MWD quality measurement while drilling. This poses a challenge in terms of misalignment (relative to the borehole) correction when compared to traditional static survey measurements where misalignments are well understood and can...

... Abstract This paper introduces an approach for automatic measurement while drilling (MWD) survey processing that can work fully autonomously and covers the entire workflow: geomagnetic reference calculation, survey data prefiltration, corrections for drillstring interference (DSI), bottom hole...

... logs. A complete workflow is presented covering: 1) utilization of reference logs, e.g., gamma ray, to correct image log depth using cross correlation and/or dynamic time warping, 2) automated identification of sidewall core cavity in borehole image log using the circle Hough transform, and 3...

... screenshot application correction unconventional completion Introduction The concept of a "virtual twin" or "operational twin" presumes a real-time software environment where the physical location is being dynamically copied to a necessary degree of details to create a synchronized and ever...

... measurement correction downhole weight drillstring design drilling operation drilling performance torque sensor penetration vibration Introduction Nowadays, the drilling process has evolved into a very scientific approach employing several sensors, measurements, and readings, some of which...

... measurements, increasing confidence in along-hole depth measurements and increasing well data value. A field data set is reviewed that showed up the similarities and the differences between DwpD and the wireline corrections. log analysis well logging correction model regime coefficient correction...

... in barite-, hematite-, or formate-weighted water-based mud systems as well as barite- or hematite-weighted oil-based muds. Further, corrections for borehole potassium can be applied in real time. A novel mechanical design enables the sensor to operate at temperature up to 329°F and borehole pressure up...

... of sediments rocks during drilling, production and EOR are of great importance to maximize profits, reduce risks and laboratory time analysis, maximize oil recovery, and reduce uncertainty in reserves estimation, and production forecast. Therefore, this work aims to correct the sedimentary rock compressibility...

... to as log normalization, is the process of applying corrective shifts to well logs to minimize the systematic error.In this paper we develop a machine learning approach to the multi-well log normalization problem which we believe is particularly applicable in unconventional field studies involving hundreds...

... of the standard condition condensate recovered at the surface to its associated density in the gas phase at downhole pressure and temperature conditions. The fundamental assumption in the B o * mass balance solution is ideal gas behavior. The gross live-fluid gas density is corrected to the live-fluid gas...

... to establish a ratio-to-porosity transform. To account for varying measurement conditions in the field, environmental corrections, based on laboratory studies and computer simulation, are applied. As an alternative to environmental corrections, the capture ratio can also be actively compensated...

...Saturation exponent computation Archie's (1942) water saturation equation is defined as: (1) S w T n = X = a R w ∅ m R t SwT = total water saturation   n = saturation exponent   a = tortuosity, assumed to be one Rw = temperature corrected...

... of the acquisition electronics. The standard environmental corrections for NGR tools correct for borehole effects (mud weight and composition, borehole size, and tool position in the borehole), so that the tool response to a given formation is independent of the borehole environment. In this paper, we present...

... reservoir compressibility Grain compressibility ultrasonic velocity measurement correction conformance Haynesville sample conformance correction society of petroleum engineers Introduction As production from shale plays maintain its role as one of the main energy resources in the U.S...

... Abstract Sigma logging is a proven method for determining oil/water saturation behind casing. In this paper, we present a new, diffusion-corrected, sigma algorithm for a four-detector pulsed-neutron logging tool. Since the diffusion effect is inversely related to the distance between source...

... standard will stray from a reading that can be relied on to be quantitatively correct. Although this is a well-known fact and there are environmental corrections available, no standard has been defined on how to develop the corrections. Service companies have their own internal correction approaches...