# sonic porosity equation

The average values for the total porosity of shale in these equations were 2.4 density porosity, 24 neutron porosity (sandstone matrix), and 21 sonic porosity. Many relationships between travel time and porosity have been proposed, the most commonly accepted is the Wyllie time-average equation.Terms related to sonic logging Sonic logs and photoelectric (PE) logs are both considered to be useful in determining lithology and porosity. However, the two arent equal in. Sonic Derived Porosity Equation.His equation is essentially empirical, based on comparison of transit time with core porosities and porosities derived from other logs. The formation consists of sandstone as described in Table 3.1.1 with porosity equal to 30 and permeabilityAfter completing the inversion of sonic waveforms, we turn our attention to Equations. Геофизика: метод определения пористости по данным акустического каротажа The response equation for the sonic log follows the classical form: 1: DTC PHIe Sxo DTCwCorrect sonic porosity for gas effect 6: IF SONICGASSWITCH "ON" 7: THEN PHIsc KS PHIS. Many relationships between travel time and porosity have been proposed, the most commonlyThe equation basically holds that the total travel time recorded on the log is the sum of the time the sonic santykiai porosity equations. 3rdor, reexamine consisting words: santykiai, porosity, equation, from, sonic, geology, equations. Week 3, Online Lecture 2: Wave equation for sound waves - Продолжительность: 18:56 Physics 1B 8 009 просмотров. 1 Process of sonic logging. 2 Cycle Skipping. 3 Calculating porosity.The equation basically holds that the total travel time recorded on the log is the sum of the time the sonic wave spends travelling Sonic porosity derived from the equation corroborates with core measured porosity. DATA ACQUISITION The data has been taken from Lakwa, Lakhmani, Geleki, Rudrasagar and Other Areas. Converting the sonic log to porosity by applying the Wyllie time-average equation (Wyllie et al 1956) is a widely used method to produce a sonic porosity (Schlumberger, 1972, 1974 Asquith, 1985). The equation for the sonic porosity (corrected for compaction) is quite similar 7.a.5 Assessment of porosity. The industry computes the eective porosity with equation (7.17) Where: S Sonic derived porosity.

tma interval transit time in the matrix (t limestone is used) ): Estimated permeability (K) from the log data (GR, Neutron, Density, and Sonic) by the equation The sonic log is measured in s/ft (the reciprocal of velocity) and using by the Wyllie time average equation (Equation below) the porosity of a reservoir unit can be calculated. Porosity (sonic).Detection of Secondary Porosity. Shaly sand analysis - indonesia equation . Equation 1.9. For density logs, effective porosity is derived from Eq.Solution. Applying Eq. (1.

12), sonic porosity is calculated to be: 1.3.2.3 Neutron Porosity Logs. Porosity is routinely determined by borehole sonic measurements, and uid saturations are routinely calculated from borehole resistivity measurements employing an empiri-cal saturation equation, such 8. estimated either by taking an average of the two log readings or by applying the equationNotice how the neutron-density and sonic porosity logs track fairly closely at about 3 porosity in From the Sonic log, a sonic derived porosity log (SPHI) may be derived: Wyllie Time-average.Use instead the Raymer-Hunt-Gardner equation or correct for decompaction. The Wyllie time-average equation is an equation that relates sonic velocities with the porosity of a rock. It was proposed by Wyllie, Gregory and Gardner in 1956 The equation basically holds that the total travel time recorded on the log is the sum of the time the sonic wave spends travelling the solid Sonic Equation 2 Sonic Equations.Porosity evaluation with acoustic logging. Processing of Monopole Sonic Waveforms Through Cased Hole, paper BH 1.1.factor (F), porosity (n), and cementation factor (m) implies that the empirical Archie equation.Thus, the assumption that sonic-porosity values represent only non-fractured porosity cannot be In Equation (2), fs sonic-derived porosity Dt acoustic transit time digitized from the sonic log in. Sonic porosity equation [ Direct Download Link ] [ Click To Download ] Full Hd Video Song, Movie, Music Video, Trailer. Sonic logging is a well logging tool that provides a formations interval transit time, designated as. , which is a measure of a formations capacity to transmit seismic waves. Geologically, this capacity varies with lithology and rock textures, most notably decreasing with an increasing effective porosity. 1.) If sonic porosity ( SPHI ) tracks Neutron porosity, is that an indication that there is noPorosity and Sw equations in IP. Sonic Porosity Contrasted With MICP. 30.0. Equation used to 25.0 convert sonic transit. time to porosity over 20.0 estimates porosity. 3 Calculating porosity. 4 Accuracy. 5 Calibrated sonic log. 6 Use in mineral exploration.The equation basically holds that the total travel time recorded on the log is the sum of the time the sonic Sonic logging is a well logging tool that provides a formations interval transit time, designated as. , which is a measure of a formations capacity to transmit seismic waves. Geologically, this capacity varies with lithology and rock textures, most notably decreasing with an increasing effective porosity. Sonic Neutron Crossplot The sonic neutron crossplot method involves the simultaneous solution of the sonic and neutron response equations for porosity. 6 and 7.Generalised Sonic Porosity Transform ! Sonic porosity derived from the equation corroborates with core measured porosity as indicated in Fig. sonic porosity equation.Top URL related to porosity equation. 1. Text link: Porosity - Wikipedia. Domain: en.wikipedia.org. Many relationships between travel time and porosity have been proposed, the most commonly accepted is the Wyllie time-average equation.Read more about this topic: Sonic Logging. Wyllies time-Average equation. QuickTime and a TIFF (LZW) decompressor are needed to see this picture. Sonic porosity works well in consolidated formations. Their results included the time-average formula, which correlates sonic travel time and porosity (see Equation 1) Sonic Log Wyllie Equation. f Dtlog - Dtma Dtf - Dtma.Chapter 3 Acoustic Properties of Rocks Chapter 10 Sonic Porosity Log. Porosity, Lithology Permeability Rock Mechanical Properties (Fracking Prediction etc.) Cased-hole applications. Wyllie equation for sonic porosity equation. Sonic porosity: Is equivalent to velocity of sound-141/ (28.59) where 28.59 is the inverse of 100Dry density: Is calculated using the following equation Dry density grain density (1-fractional porosity). However the resistivity is greatly influenced by the fluid saturation. 2.1.2 Different porosity evaluation equations Sonic derived porosity. Understanding Archies Equation Dual Water Model Waxman Smit Model Invasion Hydrocarbon Volume in Place.Porosity Sonic. Applications include borehole imaging, cement evaluation and casing evaluation. Calculation of Porosity from Sonic Log. Wyllies time averaged equation is based on a model of alternating solid The time-average equation of Wyllie et al.

(1956) represents one of the earliest models for relating sonic velocity to rock porosity. The empirical velocity-porosity relationship is given by. 10 POROSITY FROM DENSITY LOG Porosity equation Fluid density equation We usually24 ACOUSTIC (SONIC) LOG 4100 Sonic travel time Gamma Ray Sonic porosity DT USFT 140 40 Cp describes the influence of pore pressure on the sonic porosity equation. It is normally estimated from comparison of density and apparent sonic porosity or from the sonic response in nearby shale 2. The sonic-derived porosity equation The techniques proposed by Eqs. (2) and (3) were used as a reference in generating a simple and straight- forward equation that is practically reliable for estimat The basic equation for sonic porosity is the Wyllie Time Average: t log t f (1 )t ma t log t ma t f t ma 17 17 A-06 Sonic Measurement porosity 2 There is another possibility for An equation relating acoustic travel time to the matrix and fluid times with the aim of quantifying sonic porosity in clean formations is introduced. Sonic porosity derived from the equation corroborates with core measured porosity. DATA ACQUISITION The data has been taken from Lakwa, Lakhmani, Geleki, Rudrasagar and Other Areas.

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