Markus Pagels

US Patent:

20100255587, Oct 7, 2010

Filed:

Jun 22, 2010

Appl. No.:

12/820363

Inventors:

Li Jiang - Newton MA, US
Timothy Gareth John Jones - Cottenham, GB
Andrew Meredith - Cambridge, GB
Markus Pagels - Salt Lake City UT, US
Amilra Prasanna De Silva - Belfast, IE

Assignee:

Schlumberger Technology Corporation - Cambridge MA

International Classification:

G01N 27/00

US Classification:

436 28, 422 8202, 436149, 436139

Abstract:

This invention relates to methods and apparatus for determination of ion concentrations, particularly in downhole water from hydrocarbon wells, aquifers etc. It is useful in a wide range of applications, including predicting the formation of scale and fingerprinting waters from different sources. More particularly, the invention relates to the use of ligands whose electronic configuration is altered by the binding of the scaling ions within a water sample. These alterations are detected electrochemically by applying varying potential to electrodes and measuring current flow as potential is varied, from which is derived the concentration of scaling ions in the fluid.

US Patent:

20120151998, Jun 21, 2012

Filed:

Dec 21, 2010

Appl. No.:

12/974276

Inventors:

Dean Willberg - Tucson AZ, US
Markus Pagels - West Jordan UT, US
Jerald J. Hinkel - Houston TX, US

Assignee:

Schlumberger Technology Corporation - Cambridge MA

International Classification:

G01N 15/08

US Classification:

73 38

Abstract:

A method of determining wettability of a rock sample, such as from a core sample is described. The sample is preferably crushed or comminuted to a particulate size where micro fractures have been eliminated, but where the particles are still large enough to represent the native rock matrix and texture. The comminuted core sample is exposed to a test fluid for a given period of time. The rock sample can be split into many separate aliquots, and a series of tests is performed using a series of different fluids and/or the same fluid for different exposure times. The excess test fluid residing on the surfaces of sample particles is removed. The test fluid imbibed into the interior of the particulate sample is then measured. The test fluid can be, for example, water, a non-aqueous fluid, and/or a solution of miscible solvents. The technique used to measure the imbibed fluid depends on the solvent (imbibing fluid) being studied. In one example, this technique includes both gravimetric determination and quantitative chemical analysis. The detection of water can be via Karl Fischer titration.

US Patent:

20120152548, Jun 21, 2012

Filed:

Dec 21, 2010

Appl. No.:

12/974229

Inventors:

Jerald J. Hinkel - Houston TX, US
Dean Willberg - Tucson AZ, US
Markus Pagels - West Jordan UT, US

Assignee:

Schlumberger Technology Corporation - Cambridge MA

International Classification:

E21B 43/16
G06F 19/00
C09K 8/58
E21B 49/00

US Classification:

1663051, 7315205, 702 12, 507200

Abstract:

A method for determining a characteristic of an underground formation with a fluid is described. The method includes providing a sample material of the underground formation; measuring the permeability and the porosity of the sample material; performing a drainage test on the sample material using the fluid; estimating the threshold pressure of the sample material from the drainage test, the permeability and the porosity measurements; and determining the receding contact angle of the fluid on the sample material from the threshold pressure. The sample material can be disaggregated material.

US Patent:

20100163430, Jul 1, 2010

Filed:

Mar 8, 2010

Appl. No.:

12/719226

Inventors:

Clive E. Hall - Middlesex, GB
Li Jiang - Newton MA, US
Timothy G.J. Jones - Cambridgeshire, GB
Andrew Meredith - Cambridgeshire, GB
Nathan S. Lawrence - Huntingdon, GB
Markus Pagels - West Jordan UT, US

Assignee:

Schlumberger Technology Corporation - Cambridge MA

International Classification:

G01N 27/26

US Classification:

205775

Abstract:

The present invention, in one set of embodiments, provides methods and systems for integrating conducting diamond electrodes into a high power acoustic resonator. More specifically, but not by way of limitation, in certain embodiments of the present invention, diamond electrodes may be integrated into a high power acoustic resonator to provide a robust sensing device that may provide for acoustic cleaning of the electrodes and increasing the rate of mass transport to the diamond electrodes. The diamond electrodes may be used as working, reference or counter electrodes or a combination of two or more of such electrodes. In certain aspects, the high power acoustic resonator may include an acoustic horn for focusing acoustic energy and the diamond electrodes may be coupled with the acoustic horn.