An early‐time solution of pulse‐decay method for permeability measurement of tight rocks

2021 ◽  
Author(s):  
Yue Wang ◽  
Steffen Nolte ◽  
Garri Gaus ◽  
Zhiguo Tian ◽  
Alexandra Amann‐Hildenbrand ◽  
...  
Keyword(s):  
Early Time ◽  
Permeability Measurement ◽  
Time Solution ◽  
Tight Rocks

An early-time solution of pulse-decay method for permeability measurement of tight rocks

2021 ◽  
Author(s):  
Yue Wang ◽  
Steffen Nolte ◽  
Garri Gaus ◽  
Zhiguo Tian ◽  
Alexandra Amann-Hildenbrand ◽  
...  
Keyword(s):  
Early Time ◽  
Permeability Measurement ◽  
Time Solution ◽  
Tight Rocks

Reassessment of transient permeability measurement for tight rocks: The role of boundary and initial conditions

2021 ◽  
pp. 104173
Author(s):  
Yue Wang ◽  
Zhiguo Tian ◽  
Steffen Nolte ◽  
Alexandra Amann-Hildenbrand ◽  
Bernhard M. Krooss ◽  
...  
Keyword(s):  
Initial Conditions ◽  
Permeability Measurement ◽  
Tight Rocks

Early-time solution of the diffusion reaction equation

1986 ◽  
Vol 90 (17) ◽  
pp. 4111-4114 ◽  
Author(s):  
Harry L. Frisch ◽  
Zbigniew J. Grzywna
Keyword(s):  
Early Time ◽  
Diffusion Reaction ◽  
Reaction Equation ◽  
Time Solution

Fast Pressure-Decay Core Permeability Measurement for Tight Rocks

2018 ◽  
Vol 59 ◽  
pp. 606-616
Author(s):  
Zheng Gan ◽  
◽  
Ted Griffin ◽  
John Dacy ◽  
Harry Xie ◽  
...  
Keyword(s):  
Permeability Measurement ◽  
Pressure Decay ◽  
Core Permeability ◽  
Tight Rocks

Early-Time Solution of the Horizontal Unconfined Aquifer in the Buildup Phase

2017 ◽  
Vol 53 (10) ◽  
pp. 8310-8326 ◽  
Author(s):  
Elias Gravanis ◽  
Evangelos Akylas
Keyword(s):  
Early Time ◽  
Unconfined Aquifer ◽  
Time Solution

Early-Time Solution for a Radial Hydraulic Fracture

2007 ◽  
Vol 133 (5) ◽  
pp. 534-540 ◽  
Author(s):  
Andrew P. Bunger ◽  
Emmanuel Detournay
Keyword(s):  
Hydraulic Fracture ◽  
Early Time ◽  
Time Solution

scholarly journals Permeability Prediction of Sandstones Based on Mercury Intrusion Method

2022 ◽  
Vol 2152 (1) ◽  
pp. 012003
Author(s):  
Hongyi Fu
Keyword(s):  
Prediction Models ◽  
General Knowledge ◽  
Permeability Measurement ◽  
General Reference ◽  
Reservoir Evaluation ◽  
Mercury Intrusion ◽  
The Past ◽  
Permeability Prediction ◽  
The Given ◽  
Tight Rocks

Abstract The use of the mercury intrusion method has been one of the most relevant trends in determining the permeability of porous media in the past decades. In this paper, general knowledge of sandstone reservoir evaluation is delineated including the pore distribution of sandstones and air permeability measurement. Based upon the paradigmatic study conducted by Purcell, a schematic diagram illustrating apparatus used in mercury intrusion is shown and introduced, and the relevant procedure is also outlined. Four significant permeability prediction models are described respectively and compared based on researches focusing on tight rocks. By doing so, this article reveals that the performance of the models is different despite the painstaking analysis and the significance of these studies. The contribution of this present study is providing a general reference of permeability prediction by mercury intrusion method as well as its previous momentous studies, giving a comparison among the given models.

A Novel Liquid Permeameter for Measuring Very Low Permeability

1972 ◽  
Vol 12 (03) ◽  
pp. 206-210 ◽  
Author(s):  
S.K. Sanyal ◽  
R.M. Pirnie ◽  
G.O. Chen ◽  
S.S. Marsden
Keyword(s):  
High Pressure ◽  
Thermal Expansion ◽  
Source Rocks ◽  
Low Flow ◽  
Liquid Volume ◽  
Low Permeability ◽  
Permeability Measurement ◽  
Flow Rates ◽  
Physical Measurements ◽  
Tight Rocks

Abstract A liquid permeameter for very tight rocks is described. High upstream pressures are achieved by a "pump" based on the thermal expansion of liquid. Confining pressures to 10,000 psi may be maintained with a modified Hassler sleeve. Pressure is measured with a low displacement, diaphragm-type transducer. Permeability is measured indirectly through pressure decline over a time period. Introduction Permeability is an important property in petroleum engineering, as well as in several branches of science. Ground water hydrology studies and some geological problems are concerned with permeability. Permeability measurement often is very difficult. In Permeability measurement often is very difficult. In this paper we describe an instrument designed and developed to measure liquid permeabilities of very tight Precambrian rocks. These are currently of importance in the study of the origin of life. Permeabilities in the submillidarcy range are also Permeabilities in the submillidarcy range are also of importance to the petroleum industry in the study both of cap rocks of oil and gas reservoirs and fluid flow and migration through source rocks. DESIGN CONSIDERATIONS From knowledge of these samples, we felt no other known permeameter would give reliable values. A liquid permeameter was necessary because gas might dehydrate the chert or other minerals, causing a shrinkage and an unnaturally high permeability. Thomas et al. reported air and water permeabilities of very tight rocks, with the air permeability value always being much higher than the water. Also, the expected low permeability would lead to low flow rates even at high pressure differentials. Ordinary pumps would seem to be unsuitable. Casual examination of the samples revealed fractures and without sign of a pore structure; hence, permeabilities would be strongly sensitive to external or overburden pressures. A method of varying this latter factor seemed desirable. Finally, since other physical measurements might be made on the sample, nonpermanent methods of sample mounting were desirable. We decided on a novel approach to determine permeability. This involved a pump based on the permeability. This involved a pump based on the thermal expansion of liquid and the use of pressure decline to calculate permeability. COMPONENTS THE PUMP Liquid flow rates of only a small fraction of a millilter/hour were anticipated, with permeability of about 1 microdarcy. Thus, we decided to develop a pump based on the principle of thermal expansion of a confined liquid. Liquid heated in a closed container cannot expand and will become compressed. When the system reaches a steady temperature, it also reaches a steady pressure that can be estimated from certain physical properties of the liquid and container. Liquid flowing from the container will cause a simultaneous pressure decline. The amount of liquid "pumped" from the container can be calculated from its volume and isothermal compressibility. A more accurate liquid volume can be obtained through direct measurement, since the volume of the container also decreases during the process. The pump consists of a liquid-filled, steel tank similar to that used to store compressed gases. Its volume together with that of the flow lines upstream of the core was equal to 2,856 cc. This tank is immersed in a water thermostat having an adjustable, mercury-in-glass thermoregulator. The pump and the sample liquid were hydraulic oil (Pennzoil Medium, p = 0.871 gm/cc, = 70 cp at 75 degrees F). p = 0.871 gm/cc, = 70 cp at 75 degrees F). High-pressure tubing, fittings, and valves were used throughout the system (Fig. 1). SPEJ P. 206

Cytochemical Studies of Cell Wall Biosynthesis in Staphylococcus Aureus

1972 ◽  
Vol 30 ◽  
pp. 328-329
Author(s):  
Masaatsu Koike ◽  
Koichi Nakashima ◽  
Kyoko Iida
Keyword(s):  
Staphylococcus Aureus ◽  
Periodate Oxidation ◽  
Early Time ◽  
The Other ◽  
Penicillin G ◽  
Cell Wall Biosynthesis ◽  
Septal Wall ◽  
Peptidoglycan Biosynthesis ◽  
Gram Positive Bacteria ◽  
Cross Linkage

Penicillin exerts the activity to inhibit the peptide cross linkage between each polysaccharide backbone at the final stage of wall-peptidoglycan biosynthesis of bacteria. Morphologically, alterations of the septal wall and mesosome in gram-positive bacteria, which were occurred in early time after treatment with penicillin, have been observed. In this experiment, these alterations were cytochemically investigated by means of silver-methenamine staining after periodate oxidation, which is applied for detection of localization of wall mucopolysaccharide.Staphylococcus aureus strain 209P treated with 100 u/ml of penicillin G was divided into two aliquotes. One was fixed by Kellenberger-Ryter's OSO4 fixative at 30, 60 and 120 min after addition of the antibiotic, dehydrated through alcohol series, and embedded in Epon 812 (Specimen A). The other was fixed by 21 glutaraldehyde, dehydrated through glycolmethacrylate series and embedded in glycolmethacrylate mixture, according to Bernhard's method (Specimen B).

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