... to understand the differences between the logs from different sources and to bring those logs together in a quantitative manner. Upstream Oil & Gas correction chart environmental correction wireline tool gamma-ray log water-filled borehole service company borehole size log analysis well...

... borehole sigma decay borehole sigma answer algorithm log analysis formation sigma detector sigma value calculation sigma algorithm borehole decay sigc sensitivity diffusion effect salinity borehole size correction Background Sigma Logging The first pulsed-neutron sigma log...

... & Gas well logging borehole sensitivity instrument MDPN instrument sensitivity analysis detector gas-filled borehole airor gas-filled borehole borehole size sleeve material log analysis quantitative gas saturation dynamic range hydrogen density sleeved mdpn instrument gas saturation...

...). The information obtained provided significant insights into the reliability and limitations of the current algorithm. The ability to monitor the borehole size while drilling, as well as analyzing the reaming and trip out passes from recorded data, makes this measurement a valuable source of time-lapse information...

.... The successful application of the method is shown in several log examples. well logging accuracy borehole detector calibration shale porosity correction upstream oil & gas sngd measurement gamma ray ggd sngd borehole size log analysis attenuation neutron-gamma density neutron axial...

..., these situations are easily handled bymodeling. borehole size ch density index rinc porosity dependency detector borehole configuration density measurement capture count rate inelastic count rate log analysis density effect upstream oil & gas modeling count rate density index pnc tool...

... resistivity mff borehole size tabarovsky conductivity zone effect frequency response log analysis well logging borehole tool response upstream oil & gas ohm rabinovich resistivity fracture eccentricity induction logging tool liming yu spe 84097 baker atlas michael rabinovich vertical...

... caliper. Examples of the individual and integrated calipers from an azimuthal density porosity tool are presented. upstream oil & gas log analysis formation density society of petroleum engineers well logging confidence factor caliper borehole size caliper measurement annual technical...

... determination, correction of electrical logs, borehole stability, and borehole size for images. In this paper we summarize additional applications for drillers: To assess the borehole quality related to the drilling process and borehole assembly being used. To diagnose wellbore stability problems while...

... Abstract An improved method of determining and reducing the impact of borehole size and standoff on the measurement of formation density and neutron porosity has been developed. The use of standoff based binning in the density tool provides the first simultaneous measurement of density...

... of intrinsic capture cross-section (∑ int ) values from 8 c.u. to 37 c.u. while porosities ranged from 2 p.u. to 38 p.u. Borehole sizes were 6, 8, 10, and 14 inches with casing sizes of 4-1/2, 5-1/2, 7, and 9-5/8 inches. Cement annuli up to 2-inch thickness were used. Effects of saltwater, freshwater, and gas...

.... Graphs showing the borehole effects for a range of borehole sizes, mud resistivities and formation resistivities are presented. Log examples of the phase caliper and borehole-corrected resistivities are presented. receiver borehole correction borehole size attenuation phase caliper cdr tool...

... Borehole Size – Borehole washout is a time related phenomenon. The drill bit essentially drills a borehole that is close to gauge, which immediately begins to deteriorate as mud flow erodes the walls. The sooner the borehole can be logged, the more consistently near gauge the hole...

... by comparison with laboratory measurements of the experimental tool response to formation porosity, formation matrix, borehole size, tool stand-off, and temperature. limestone application monte carlo calculation log analysis equation detector calculation neutron porosity device particle porosity...

... environment on porosity measurements made with a Compensated Neutron instrument. This data includes the effect on the individual detectors as well as the effect on the ratio of the two detectors. The effects of borehole size, borehole standoff, formation lithology, casing and salinity have been analyzed...