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Keywords: relative dip angle
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Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-F
.... RESISTIVITY MODELING AS A TOOL TO CONSTRAIN STRUCTURAL DIP INTERPRETATION LWD propagation resistivity measurements are highly affected by formation anisotropy, shoulder- bed, and other borehole effects in wells with high relative dip angle. These effects are much more pronounced in LWD propagation tools than...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-EEEE
... be used to invert the horizontal resistivity and vertical resistivity. However, the 1D inversion method cannot provide accurate anisotropy measurements in permeable formations where the relative dip angle is low. A new LWD resistivity tool was developed with conventional and oriented transmitters...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-YYY
.... And then, the value of GRU starts to increase at the point that HRNR enters the investigation area of the upper detector. At that point, the distance from drilling bit to boundary surface can be expressed as the ratio of the depth of investigation (DOI) to the sine value of the relative dip angle between the boundary...
Proceedings Papers

Paper presented at the SPWLA 54th Annual Logging Symposium, June 22–26, 2013
Paper Number: SPWLA-2013-BBB
... is of great value for geosteering applications. This is particularly true in the case of shale reservoirs, where natural gamma ray measurements may be critical for well placement. An important use of imaging data is the computation of relative dip angle. The computation requires knowledge of the depth...
Proceedings Papers

Paper presented at the SPWLA 53rd Annual Logging Symposium, June 16–20, 2012
Paper Number: SPWLA-2012-124
... saturation reservoir log analysis relative dip angle evaluation high angle well Texas Upstream Oil & Gas spwla 53 Symposium electrical anisotropy horizontal resistivity resistivity sensor Klein sensor resistivity vertical well anisotropy SPWLA 53 rd Annual Logging Symposium, June 16...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-CCC
... anisotropy in vertical wells with low relative dipping angle. LWD azimuthal measurements have also shown similar field success in providing resistivity anisotropy in formations with high relative dip angle. The success of the wireline triaxial induction relied on antenna configurations that allowed...
Proceedings Papers

Paper presented at the SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-21847
... as the trough of the sinusoid. Yin et al. (2006) and McKinny et al. (2008) show that the borehole image estimated relative dip angle, , can be obtained with the equation = tan-1[(A BD + 2 R)] , (1) where A is the measured crest of the sinusoid, B is the trough, D is the borehole diameter, and R...
Proceedings Papers

Paper presented at the SPWLA 49th Annual Logging Symposium, May 25–28, 2008
Paper Number: SPWLA-2008-ZZ
... for hydrocarbon production. log analysis resolution well logging Upstream Oil & Gas target azimuth sinusoid boundary spwla 49th calculation density depth investigation Symposium standoff relative dip angle borehole density image algorithm azimuth weighting function bed boundary...
Proceedings Papers

Paper presented at the SPWLA 45th Annual Logging Symposium, June 6–9, 2004
Paper Number: SPWLA-2004-ZZ
..., the interpretation for highly deviated (>70 degrees) wells remains an area of challenge. We found that interpretation schemes and strategies that work very well in the vertical well scenario might not be applicable anymore in highly deviated wells, with relative dip angles greater than 70 degrees. The reason...
Proceedings Papers

Paper presented at the SPWLA 42nd Annual Logging Symposium, June 17–20, 2001
Paper Number: SPWLA-2001-Q
... resistive zones. This example shows that even a 5 ° error on the relative dip angle can lead to a grossly wrong resistivity model from the inversion. It is necessary, therefore, to take the relative dip and azimuth angles into consideration in interpreting multicomponent induction logging data. Relative dip...
Proceedings Papers

Paper presented at the SPWLA 42nd Annual Logging Symposium, June 17–20, 2001
Paper Number: SPWLA-2001-U
... of induction logs from wells with high relative dip angles are well known. ("Relative dip angle" refers to the angle of dip of a bed with respect o the axis of the borehole.) At zero relative dip angle, the currents induced in the formation do not cross bed boundaries. As the dip angle increases, a larger...
Proceedings Papers

Paper presented at the SPWLA 41st Annual Logging Symposium, June 4–7, 2000
Paper Number: SPWLA-2000-DDD
...SPWLA 415 Annual Logging Symposium, June 4-7,2000 DEVIATED-WELL SOFTWARE FOCUSING OF MULTIARRAY INDUCTION MEASUREMENTS Jiaqi Xiao, Ingo Geldmacher, and Michael Rabinovich Baker Atlas, 10201 Westheimer, TX 77042, USA ABSTRACT In highly deviated wells or when the relative dip angle between formation...
Proceedings Papers

Paper presented at the SPWLA 39th Annual Logging Symposium, May 26–28, 1998
Paper Number: SPWLA-1998-G
..., regardless of the relative dip angle (RDA). The core data from adjacent wells show the permeability to vary significantly on a sample-by-sample basis, consistent with a reservoir that is made up of thin layers of differing Sw. The study area is the Yakin Field, which is located offshore East Kalimantan...
Proceedings Papers

Paper presented at the SPWLA 39th Annual Logging Symposium, May 26–28, 1998
Paper Number: SPWLA-1998-W
... anisotropy. well logging resistivity anisotropy LWD resistivity measurement relative dip angle homogeneous formation algorithm Upstream Oil & Gas spwla 39th Hagiwara resistivity measurement apparent resistivity log analysis simultaneous anisotropy dielectric effect Symposium...
Proceedings Papers

Paper presented at the SPWLA 38th Annual Logging Symposium, June 15–18, 1997
Paper Number: SPWLA-1997-C
... ABSTRACT It has been shown that using resistivity tools with axial-dipole antennas one can measure horizontal resistivity and a function of vertical resistivity and relative dip angle. Without additional information, the vertical resistivity and relative dip angle can not be uniquely...
Proceedings Papers

Paper presented at the SPWLA 38th Annual Logging Symposium, June 15–18, 1997
Paper Number: SPWLA-1997-T
... on numerous real time MWD logs with high relative dip angles. Predicting anisotropy effects in a formation can be extremely important in determining zone tops and geosteering within the objective zone at high relative dip angles. There is not an easy way to predict the anisotropy ratio (Rv/Rh) without a high...
Proceedings Papers

Paper presented at the SPWLA 35th Annual Logging Symposium, June 19–22, 1994
Paper Number: SPWLA-1994-PP
... ABSTRACT Theoretical modeling and field examples have shown that rock anisotropy affects the phase shift and attenuation-derived resistivities of an MWD electromagnetic wave resistivity sensor differently in horizontal and deviated wells. These effects depend on the relative dip angle...

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