The adsorption of Direct Brown 1 dye using kaolinite and surfactant modified kaolinite

Mark Jeeva, Sivarama Krishna Lakkaboyana, Wan Zuhairi W.Y.

Geological Society of Malaysia (GSM)

... and statistics of HDTMA amount and amount of DB adsorbed. Mass (g) CTABBen Qe1 CTABBen Qe2 CTABBen Qe3 Mean Standard Deviation Relative Standard...

A New Approach of Thin Bed Analysis Using Innovative LWD Imaging to Improve Net-Pay

Restio Brata, Mario Petricola, Hengky NG, Rahmi Kemalawati, Budiyono, Yus Willian, Bambang Pujasmadi, Aditi Pal

Indonesian Petroleum Association

...** ABSTRACT Analyzing thin bed reservoir requires more-accurate and higher-resolution logging tools. Standard openhole logs are incapable of analyzing...

Statistical Methods

Parker D. Trask, H. Whitman Patnode

AAPG Special Volumes

... the standard deviation. The standard deviation, however, is somewhat laborious to calculate and has not been used in this investigation. Instead...

Innovation in Horizontal Wells Petrophysical Evaluation, A Case Study from Kuwait; #41300 (2014)

A. I. Elsherif, W. Bryant, A. Al Mershed, H. Al-Zuabi, K. Al-Failakawi, and S. Nair

Search and Discovery.com

.... The first one is the pilot hole drilled with 64 deg. deviation and the second one is the lateral deviated hole drilled with 80 deg. deviation. As shown...

Despiking Ultrasonic Doppler Velocity-Profiling Data

Jonathan D. Wright, Jaco H. Baas

Journal of Sedimentary Research (SEPM)

...) used an absolute deviation greater than κσ, where κ  =  1.5 and σ is the standard deviation of the mean for the velocity time series. Goring...

Estimation of Error in Grain Size Analysis

J. C. Griffiths

Journal of Sedimentary Research (SEPM)

... as these are the units used in grain size analysis.(FOOTNOTE 1) The subsequent steps followed by Krumbein comprised converting the variance via the standard deviation...

Visual Comparators for Estimating the Degree of Sorting from Plane and Thin Section: RESEARCH METHOD PAPER

Samuel Longiaru

Journal of Sedimentary Research (SEPM)

... on inappropriate statistics. Harrell (1985) defended his use of a number frequency model on the grounds that the standard deviation (or sorting) for lognormal...

Isotope Composition of Strontium in Carbonate Phase of Two Cores from Black Sea: Geochemistry

Jeffrey M. Cox, Gunter Faure

AAPG Special Volumes

... ratio of 0.7093 ± 0.0007 (one standard deviation). Bukry, D., 1970, Coccolith intrusion in the Black Sea since the ice age: Oceanus, v. 15, no. 4, p...

Estimating Average Fracture Spacing in Subsurface Rock

Wayne Narr

AAPG Bulletin

... is about 1 order of magnitude less than the spacing in well 2 (Table 1) and, given the uncertainty (estimated from ±1 standard deviation...

Preliminary Evaluation of a Core Scintillation Counter for Bulk Density Measurement in Marine Sediment Cores

Chester Brier , Robert Bennin , Peter A. Rona

Journal of Sedimentary Research (SEPM)

...). For the discrete Poisson distribution the standard deviation is m, in which m=VT. m = Average number of events V = Rate at which...

Engineering Geology Characteristics of a Granitic Mass, Penang

Lim Tow Ho

Geological Society of Malaysia (GSM)

... and the standard deviation is 56.5 em. The standard deviation is higher than average spacing because the spacing shows wide variations from areas where...

Abstract: Stochastic Velocity Modelling For Depth Conversion In 3D Modelling

Anders Torp

Petroleum Exploration Society of Australia (PESA)

... or verti cal we ll s. 2. Check for spatial trends and standard deviation throu gh data analysis. Figure 2 (top right) illustrates an observed trend...

Tectonic Framework of Powder River Basin, Wyoming and Montana, Interpreted from Landsat Imagery: DISCUSSION

Robert H. Barton

AAPG Bulletin

... through a standard deviation analysis. The resultant standard deviation anomalies eliminate the bias that is present when lineaments from different...

Porosity, Permeability, and Pore Characterization of the Triassic Cumnock Formation: A Continuous Gas Assessment Unit, Sanford Sub-Basin, Deep River Basin, Lee County, North Carolina, USA; #10662 (2014)

Jeffrey C. Reid, Kenneth B. Taylor, Michael M. McGlue

Search and Discovery.com

...%, the maximum is 6.43%, and the standard deviation is 1.46%. The average permeability in the “sweet spot” (drill hole CH-C-1-45) is 1.75 × 10-5 md...

The Mineralogical Composition of Shales

Daniel B. Shaw , Charles E. Weaver

Journal of Sedimentary Research (SEPM)

... for I1. The deviation of these average values from the calculated values of the standard mixtures was within ±10 percent of the amount present...

A Rapid Visual Method for Estimating Sedimentary Parameters

Grover H. Emrich , Frank J. Wobber

Journal of Sedimentary Research (SEPM)

... to make and more accurate than estimates of median diameter. Statistical evaluation of the results were based on the standard deviation and a three...

The Goodness-of-fit to Ideal Gauss and Rosin Distributions: A New Grain-size Parameter

Ruprecht Schleyer

Journal of Sedimentary Research (SEPM)

... Parameter The value of a complete and ideal Gauss-distributed grain-size distribution is equal to its standard deviation. The s value of a complete...

Pitfalls in Statistics for Environmental Sampling Evaluation

Yue Rong

Environmental Geosciences (DEG)

... standard deviation; and n is the number of samples. To obtain a sufficient sample size, equation (1) is solved for n: (2) n = t p × S 2...

Integrating Mineralogy, Process Sedimentology and Geomechanics for Development of a Mechanical Stratigraphy Model of the Bakken Formation

Alyssa Charsky, David Pyles, Steve Sonnenberg

Unconventional Resources Technology Conference (URTEC)

... for the vertical well shows trends with depth and location in the stratigraphy (Figure 4). Moving standard deviation curves using a one-foot window...

Abstract: Isotopic Composition of Strontium in Evaporites from Ochoan Series of New Mexico and Cayugan Series of Ohio, by E. L. Tremba, G. Faure; #90978 (1975).

Search and Discovery.com

Abstract: Influence of Source and Processes in Distribution of Heavy Minerals, Muddy Sandstone (Lower Cretaceous), Wind River Basin, Wyoming, by Tumkur R. Gopinath, K. Renee Davis, Wayne D. Martin; #90972 (1976).

Search and Discovery.com

ABSTRACT: MERCURY IN CHINA COALS

Harvey E. Belkin, Robert B. Finkelman, Qichao Wang, Binbin Wang, Baoshan Zheng

The Society for Organic Petrology (TSOP)

... with an estimated precision of 10% and a detection limit of 0.02 ppm. The arithmetic mean is 0.15 ppm Hg (n=307) and the 1 sigma standard deviation is 0.14 ppm...

The Paleomagnetic Contribution to the Permian-Triassic Boundary [Abstract]

A. E. M. Nairn, D. N. Peterson

CSPG Bulletin

.... Commonly rocks are found with a polarity opposite to that anticipated and the directions themselves indicate an increasing deviation from the present...

ABSTRACT: A STUDY ON HYDROCARBON POTENTIAL OF CARBONACEOUS MUDSTONES IN THE LIARD BASIN, NORTHEAST BRITISH COLUMBIA

Nguyen Binh Thi Thanh, Nakayama Kazuo, Toshihiro Takahashi

The Society for Organic Petrology (TSOP)

... Carboniferous, middle Carboniferous and Cretaceous. The estimated values of the average activation energy, standard deviation and genetic potential...

Heat Field and its Effect on Physical-Chemical Properties of Oils of the Kuybyshev Area on the Volga

S. I. Sergiyenko, A. P. Vysotskaya

Petroleum Geology: A Digest of Russian Literature

... lighter than in the Lower and Middle Carboniferous (20-40°C). The standard deviation here is less. This is unusual in that processes of hypergenesis...