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Keywords: variation
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Journal Articles
SPE Drill & Compl (2022)
Paper Number: SPE-208788-PA
Published: 31 March 2022
... of the classic calculation is reviewed before describing a first-principles approach to determining the consequences which casing seat strength limitations and strength variations in the overall openhole section impose on safe well designs as a result of uncertainties in the input variables and basic model...
Journal Articles
SPE Drill & Compl 37 (01): 93–103.
Paper Number: SPE-196179-PA
Published: 09 March 2022
... demonstrates that, in several subsea scenarios, a relatively small error in the experimental fluid PVT data can lead to significant variation in APB estimation. The ML-based models for “density = f ( T , P )” for the fluids ensure that the cumulative error during the modeling process is minimized. The use...
Journal Articles
SPE Drill & Compl 36 (04): 976–990.
Paper Number: SPE-206727-PA
Published: 15 December 2021
... with previous reports on SCP buildup in wells. On a local scale, however, we observed significant variations in cement quality from both the log results and the seepage testing. Further, we found qualitatively very good correlations between seepage-test results and the log results for the bond between cement...
Journal Articles
SPE Drill & Compl 35 (04): 598–619.
Paper Number: SPE-201108-PA
Published: 17 December 2020
... and multiphase‐flow nature of a drilling system. Moreover, it captures nonlinear boundary conditions at the inlet of the drillstring, at the drill bit, and choke manifold, and also the variations in the cross‐sectional area of the flow path. Model validations against field data from real‐life MPD operations...
Journal Articles
SPE Drill & Compl 34 (02): 189–206.
Paper Number: SPE-191780-PA
Published: 05 April 2019
... natural frequency Drilling Assembly june 2019 lateral natural frequency Artificial Intelligence Upstream Oil & Gas variation BHA directional performance vibration drillstring design drilling operation calculation dynamic response Exhibition torsional mode bit steerability bha model...
Journal Articles
SPE Drill & Compl 34 (01): 27–45.
Paper Number: SPE-189661-PA
Published: 20 November 2018
... flows in and out of fractures as a consequence of three mechanisms: bulk volume deformation, fluid compressibility, and fracture-aperture variation. To represent this complex scenario, a model involving a continuously distributed fracture network is developed. A time-dependent, 1D dual-poroelastic...
Journal Articles
SPE Drill & Compl 33 (03): 259–274.
Paper Number: SPE-191138-PA
Published: 17 May 2018
... the incorporation of wellbore thermal effects, whereas the RP ( DNVGL-RP-0142 2015 ) only briefly mentions that the effect of temperature should be considered. This perhaps responds to a lack of studies on how this may be taken into account or scarce knowledge about how the variations of wellbore-temperature...
Journal Articles
SPE Drill & Compl 33 (01): 50–62.
Paper Number: SPE-189987-PA
Published: 20 February 2018
... flow rate bop pipe ram system degradation valve variation leakage area pipe ram SPE Drilling neural network regulator hydraulic resistance degradation well control equipment model coefficient virtual system closing event coefficient adaptive cpm model A BOP is a pressure...
Journal Articles
SPE Drill & Compl 32 (01): 13–24.
Paper Number: SPE-166801-PA
Published: 13 March 2017
...E.. Cayeux; B.. Daireaux Summary Abnormal variations of the pit volume are a prime indicator of mud losses and formation-fluid influxes. However, the detection of gain and loss at the pit level can be difficult because of the transient behavior of several components in the hydraulic loop...
Journal Articles
SPE Drill & Compl 31 (02): 159–165.
Paper Number: SPE-173864-PA
Published: 01 February 2016
..., and remediation. As compared with normal production, CO 2 injection imposes lower temperatures and stronger temperature variations on wells. This is especially prevalent if the injection is not continuous. Downhole-temperature variations will result in expansion or contraction of casings and well-barrier...
Journal Articles
SPE Drill & Compl 29 (02): 215–225.
Paper Number: SPE-166226-PA
Published: 12 June 2014
... Error variation magnetic field azimuth uncertainty SPE Drilling error model Barent Sea latitude University total field Following Ekseth ( 1998 ), the azimuth A used in magnetic-wellbore-directional surveying is given by Fig. 3 Azimuth error as function of dip angle...
Journal Articles
SPE Drill & Compl 29 (01): 78–87.
Paper Number: SPE-159899-PA
Published: 20 February 2014
... horizontal-stress contrast proppant mass in-situ horizontal-stress contrast Roussel variation interference hydraulic fracturing wellbore hydraulic fracture Sharma reservoir fracture length pay zone completion design fracture Unconventional oil-and-gas reservoirs, especially shale...
Journal Articles
SPE Drill & Compl 28 (02): 158–167.
Paper Number: SPE-159679-PA
Published: 23 May 2013
... to drilling operations. The technique described in this paper may contribute to safer and more-productive offshore operations at high latitudes. Directional surveying with magnetic MWD in northern waters will generally benefit from being corrected for variations in the Earth's external magnetic field...
Journal Articles
SPE Drill & Compl 27 (03): 392–405.
Paper Number: SPE-151039-PA
Published: 18 September 2012
... drilling measurement drilling fluid property drilling fluids and materials modeling measurement while drilling attenuation Upstream Oil & Gas real time system Artificial Intelligence drilling fluid formulation variation fem modeling wellbore SPE Drilling field component anomaly magnetic...
Journal Articles
SPE Drill & Compl 27 (02): 303–314.
Paper Number: SPE-139668-PA
Published: 30 May 2012
... to simulate the various modes of loss of cement-sheath integrity after cement has been placed: (a) cement volume variations during hydration owing to chemical shrinkage/expansion; (b) cement volume-variations during hydration owing to cement heat-production; (c) contraction (dilation) of the casing owing...
Journal Articles
SPE Drill & Compl 26 (01): 13–31.
Paper Number: SPE-124719-PA
Published: 08 March 2011
... the casing. The microannuli are commonly explained by variations in cement volume during hydration (chemical shrinkage/expansion) or by contraction of the casing because of a decrease in mud density/temperature because these could create a gap if the cement is unable to follow the induced deformations...
Journal Articles
SPE Drill & Compl 25 (04): 438–447.
Paper Number: SPE-133417-PA
Published: 21 June 2010
... difference variation multistation accelerometer test multistation test spe drilling Torkildsen tool face tolerance gyro survey error term trajectory design ekseth control moderate control inclination difference Drilling december 2010 Like all measurements, downhole directional surveys...
Journal Articles
SPE Drill & Compl 25 (02): 230–238.
Paper Number: SPE-119851-PA
Published: 14 April 2010
... & Gas variation crustal field well profile magnetic dip angle magnetic field latitude SPE Drilling confidence level confidence limit trajectory design total intensity Gaussian well planning directional drilling In this study, we use geomagnetic-observatory data to estimate BGGM...
Journal Articles
SPE Drill & Compl 24 (04): 611–625.
Paper Number: SPE-112687-PA
Published: 23 December 2009
... 23 12 2009 Copyright 2009, Society of Petroleum Engineers drilling fluid management & disposal Engineering concentration real time system Upstream Oil & Gas chemistry fluid loss particle drilling fluids and materials shaker variation mineralogy instrument University...
Journal Articles
SPE Drill & Compl 23 (04): 353–360.
Paper Number: SPE-105717-PA
Published: 10 December 2008
... casing and cementing weak section Master Curve application strain localization variation thermomechanical test loading spe drilling elastic stress range hysteresis loop strain rate deformation stress relaxation Conventional elastic load-based well design is based on limiting all...

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