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What is the residual oil saturation for water flooding vs immiscible gas flooding? | Ask PERM

Amir Asks PERM: Hi there, If you flood two identical cores (let's say with poro=25%, perm=200 md) one with water and another one with immiscible gas (like associated gas), for which case do you expect a higher residual oil saturation? Thanks, Amir   Dr. Jonathan Bryan from PERM Answers: Hello, Let’s start by assuming that [...]

2016-10-25T11:54:48+00:00 May 26th, 2016|Ask PERM (Q&A)|0 Comments

Clarifications on the Jamin Effect and Why High Capillary Pressure is Bad for Flow? | Ask PERM

David Asks PERM: Dear Perm, My name is David. I am studying petroleum engineering, and I read the article from your web page about the Jamin effect. At the bottom of the page, it said that we can ask question to you about the subject. I therefore have a question about the article on you web [...]

2016-10-25T11:54:48+00:00 February 17th, 2016|Ask PERM (Q&A)|0 Comments

Oil Viscosity Selection for Unsteady State Relative Permeability Tests? | Ask PERM

Marko Asks PERM: Hi, I like your site very much and especially the Fundamentals of fluid flow paper. I hope that you can answer me one question regarding the oil viscosity selection for the unsteady state relative permeability measurements at room conditions for the oil/water system. I heard that the general practice for the paraffinic oil [...]

2016-10-25T11:54:48+00:00 February 4th, 2016|Ask PERM (Q&A)|0 Comments

Ensuring Capillary Contact in Porous Plate Drainage Measurements using Impedance | Ask PERM

Joseph Asks PERM: Dear Sir/Madam, In Drainage Capillary pressure measurements using porous plate, how will you ensure that there is enough/good capillary contact between the core plug sample and porous plate? In most cases labs uses the 2 electrode core holder. And i have heard that if the phase angle of impedance measured across the electrode [...]

2016-01-25T11:35:48+00:00 January 25th, 2016|Ask PERM (Q&A)|0 Comments

Should Slim Tube Tests Use Reservoir Rock? | Ask PERM

Ehab Asks PERM: My question is related to the Slim Tube Test procedure and here it is; The porous media which fills the coiled tube through it the oil and solvent passes. Should this porous media of the same reservoir rock or not? My thought it is of glass beads or Otawa Sand, is not it? [...]

2016-01-18T12:09:05+00:00 January 18th, 2016|Ask PERM (Q&A)|0 Comments

What is the Effect on Trapping of Oil Drop in a Pore Doublet Throat When Oil Viscosity is High? | Ask PERM

Aya asks PERM:  What will happen if viscosity of oil was not equal to viscosity  of water , what is the general effect on trapping of oil drop in a pore doublet throat if the viscosity of oil was large ? -Aya   Dr. Jonathan Bryan from PERM Answers: This is a great question! The [...]

2016-10-25T11:54:48+00:00 January 14th, 2016|Ask PERM (Q&A)|0 Comments

General Rules of Thumb for Picking Injection Rates in a Core Flood? | Ask PERM

Binu Asks PERM: Dear sir, I am planning to conduct a core flood experiment using a restored core of 7 cm length, 3 cm diameter, 14% porosity and liquid permeability of 50 mD. The PV of the core is 15 ml. Kindly tell me how to set the injection rate in ml/hr. Is there any rule [...]

2016-01-13T17:34:16+00:00 January 4th, 2016|Ask PERM (Q&A)|0 Comments

Examples where JBN is Applied on Experimental Data with Constant Rate and Variable Pressure Drops? | Ask PERM

Mamudu Asks PERM: Dear Sir/Madam, Can I get material from you that has detailed work examples where JBN is applied on experimental data with constant rate and variable pressure drops? Thank you for your anticipated assistance. Best Regards, Mamudu   Dr. Jonathan Bryan from PERM Answers: Hello, Are you looking for a workflow of how to [...]

2016-01-13T17:33:51+00:00 December 2nd, 2015|Ask PERM (Q&A)|0 Comments

How to Calculate Water Saturation After Trimming a Plug? | Ask PERM

Julie Asks PERM: After re-trimming, is the water saturation just obtained by the subtraction of the volume of the initial plug to the re-trimmed plug? What I mean is,  As, Sw=Vw/Vpore Sw: water saturation Vw: volume of water collected Vpore: pore volume Can we use this formula after retrimming: Sw = (Vw * Vpa) / (Vp*Vpore) [...]

2016-01-13T17:33:21+00:00 September 21st, 2015|Ask PERM (Q&A)|0 Comments

What Pressure of Gas to Use for Measuring Permeability & Why Does Saturation Not Match Fluid and Gas in Pores? | Ask PERM

Julie Asks PERM: I have two main questions if you could help me: -How to choose the pressure of gas if we want to measure the permeability of a reservoir rock?  -When doing the saturation, is it possible that the pore volume is much higher than the fluid volume, if yes, what could be in the [...]

2016-01-13T17:32:52+00:00 September 1st, 2015|Ask PERM (Q&A)|0 Comments