.... CEMENT PROPERTIES IN LAB Laboratory measurements of the properties of cements are an industry standard and involve the use of an Ultrasonic Cement Analyzer (UCA). In this system, the compressional transit time, inverse of the velocity, is measured as a function of time at a nominal pressure...

.... well logging detection Schlumberger Upstream Oil & Gas Engineer Symposium log analysis transit time algorithm slim sonic tool field data example sonic waveform waveform slowness University Engineering united states compressional slowness STC processing Japan SPWLA 52 nd Annual...

..., aragonite, and associated minerals such as pyrite). Artificial Intelligence petrophysical property neutron porosity Reservoir Characterization Upstream Oil & Gas transit time Heterogeneity Log well logging spwla 51 porosity application log analysis heterogeneity Symposium carbonate...

...SPWLA 44 th Annual Logging Symposium, June 22-25, 2003 Porosity Estimation from Shear Wave Interval Transit Time in the Norphlet Aeolian Jurassic Sandstone of Southern and Offshore Alabama Russell W. Spears and Wayne F. Nicosia ExxonMobil Production Company, New Orleans, Louisiana 70161 ABSTRACT...

... result were Rt, Rxo, gamma ray, bulk density, neutron porosity, and sonic transit time curves that are entirely interchangeable between the Russian and Western logged wells. Data from either the Russian or Western logged wells could then be interpreted in a conventional manner using standard log analysis...

... Upstream Oil & Gas mixture model kuster geophysics clay content prediction Velocity Dispersion frequency transit time sandstone Reservoir Characterization Symposium p-wave velocity aspect ratio pore geometry laboratory measurement pore lithology porosity sand-clay mixture...

... diameter holes. Later versions of the tool use depth-based compensation, similar to that used in full-size array sonic sondes. SPWLA 33rd Annual Logging Symposium, June 14-17, 1992 The transducers are piezo-ceramic and interval transit time can be displayed between any pair of receivers, giving logs...

...SPWLA TWENTY-SEVENTH ANNUAL LOGGING SYMPOSIUM, JUNE 9-13, 1986 THE CONCEPT OF ACOUSTIC FORMATION FACTOR FOR MORE ACCURATE POROSITY DETERMINATION FROM SONIC TRANSIT TIME DATA by J. Raiga-Clemenceau, J.P. Martin, and S. Nicoletis TC)TAL - Compagnie Fran~aise des P6tro1es Paris - France G ABSTRACT...

..., it provides a means for inspection of the casing to cement bond, cement in the annulus and the cement to rock bond. It is well known that the sonic velocity of cement is a good index of cement strength (2). Therefore, if one had the capability to measure the cement velocity or transit time behind casings...

... diameter conductivity environmental correction induction transit time special caliper design Upstream Oil & Gas borehole neutron tool Symposium standoff correction hole size sonde caliper SPWLA TWENTY-SEVENTH ANNUAL LOGGING SYMPOSIUM, JUNE 9-13, 1986 Ill ACCURATE LOGGING IN LARGE...

... (in time) of the fixed gate position with respect to the detected arrival time of the 3-ft (0.9-m) receiver spaced waveform. Verification of correct placement of the fixed gate can be made by direct comparison of fixed gate amplitudes vs. sliding gate amplitudes in zones of good transit time detection...

... core data are available. The agreement between the two techniques is very good over most of the well. Some difference between the results from the two techniques was noted over one interval of the test well. This difference was noted in both the compressional and shear interval transit times and is due...

... ABSTRACT Full waveform digital sonic log amplitudes from a well in a Tertiary Gulf Coast elastic section are analyzed in terms of formation attenuation and coupling. Modifications of the technique of borehole compensation (BHC) of transit times are applied to compressional wave amplitudes. Two...

... to Schlumberger's Long Spaced Sonic tool but the principles discussed can be applied to all depth-derived borehole compensated acoustic tools, regardless of transmitter-to-receiver spacings. well logging xxxx enhancement Symposium transit time measurement travel time measurement borehole histogram...

... well logging compressional wave spaced tool Reservoir Characterization Upstream Oil & Gas traveltime log borehole log analysis frequency calculation transit time shear wave Artificial Intelligence formation shear velocity information Symposium p-wave transit time arrival...

... ABSTRACT Sonic logs were run in a well over the same section four different times. These runs were made 3, 13, 25, and 35 days after the section had been drilled. Comparison of the four Borehole Compensated Sonic logs showed progressive increases in transit times over the shales. This provided...

... the gamma ray transit time (2.4 receiver), and COI Iar locator curves are presented. In track 2, the Schlumberger Bond Index curve (.5 - 1.0) based on the BHC attenuation measurement is presented in the lower half, while the CBL output at 2.4 is shown in the upper half. Finally, track 3 is dedicated...

... ABSTRACT Over the 20 years since acoustic velocity well logging was introduced, deficiencies have been noted in the transit time, t, to porosity, transform (popularly referred to as the Wyllie time average equation). In particular, at the porosity extremes, O and 10O%, the transit time seems...

..., the casing signal amplitude resolution in bonded casing is determined by transmitter-receiver spacing: a short spacing provides better resolution. Also, a single receiver transit time measurement can provide quality control by indicating when, or whether, recorded amplitude signal is truly representative...

... this concept in relating interval transit time-porosity-depth of burial. The author describes a method to construct a transit time-depth plot (TDP) for a given well, taking a number of wells and assembling a type compaction gradient for a given sedimentary basin. The compaction gradient on the TDP on each well...