Paper presented at the 32nd Tekna Oil Field Chemistry Symposium 2021

Ross McCartney recently presented a paper titled “De-risking dissolver treatments in low pressure wells by data manipulation and modelling“. This paper shows how formation water compositions and rates can be estimated from produced water compositions and rates when condensation water is being produced. In this case, it allowed the genuine scale risks in the wells to be determined to aid the development of appropriate scale mitigation and treatment plans.

Paper accepted for Oilfield Scale Conference, Aberdeen, June 2018

 

A case study paper co-authored by Ross McCartney has been accepted for presentation at the SPE International Oilfield Scale Conference and Exhibition in Aberdeen in June 2018.

It is entitled “Correcting for Mud Filtrate Contamination of Formation Water Samples for Scale Management Planning: A Case Study from the Nova Field, Norwegian North Sea” and is co-authored with Stephan Hatscher and Vincent Droppert (Wintershall Norge AS) (view abstract here).

Links to the papers will be posted after they have been presented.

Provision of formation water quality assessments to Core Specialist Services Limited

Formation water compositions are usually required for core studies undertaken on SCAL, formation damage and EOR projects.

But, formation water compositions may not be representative of those in the reservoir because they can be changed by many factors including: contamination (e.g. by drilling mud, use of incorrect preservatives, etc), sample cooling, sample de-pressurisation, sample de-gassing, exposure of the sample to air, use of inaccurate or inappropriate analytical methods, and erroneous reporting.

Use of an incorrect formation water composition can impact core study results, including:

  • Clay swelling and fines mobilisation (induced damage studies).
  • Use of incorrect salinity (resistivity/conductivity for Petrophysical SCAL studies).
  • Incorrect viscosity (mobility ratio for reservoir engineering SCAL studies).
  • Formation of mineral scale.
  • EOR with polymer and surfactants need to be accurately matched to a correct formation water salinity.
  • EOR by low salinity water flooding; de-risking the formation water composition is of profound importance.

Recently, we have been pleased to support Core Specialist Services Limited (CSS) by evaluating the quality of formation water compositions before they are used in core studies.

This work has involved (a) identification of uncertainties in these compositions arising from sampling and analysis conditions, (b) constraining/estimating more appropriate compositions where necessary, and (c) providing compositions that will be stable for laboratory studies.

The evaluations have been well received by CSS Clients and CSS are now offering this as a routine service option.  Please see the CSS website for more details.

New paper published in SPE Production and Operations….

 

The paper entitled “Johan Sverdrup Field – Origin of sulphate-rich formation water and impact on scale management strategy” (co-authored with Kari Ramstad, Henriette Dorthea Aarrestad, Siv Kari Lien, Øystein Sæther, and Rita Iren Johnsen of Statoil ASA) has now been published in SPE Production and Operations (preprint).   View here….

Links for newly presented papers now available….

 

Links for papers co-authored by Ross McCartney that were presented at the SPE International Oilfield Scale Conference and Exhibition in Aberdeen on 11-12 May 2016 are now available:

  • High Pb and Zn Concentrations in Formation Water From the Culzean Field: Real or Artefact?” (co-authored with Stuart Brice and Andrew Chalmers of Maersk Oil North Sea UK Ltd).  View here….
  • Johan Sverdrup Field – Origin of sulphate-rich formation water and impact on scale management strategy (co-authored with Kari Ramstad, Henriette Dorthea Aarrestad, Siv Kari Lien, Øystein Sæther, and Rita Iren Johnsen of Statoil ASA).  View here….

Papers accepted for Oilfield Scale Conference, Aberdeen, May 2016

 

Two case study papers co-authored by Ross McCartney have been accepted for presentation at the SPE International Oilfield Scale Conference and Exhibition in Aberdeen next May.

The first is entitled “High Pb and Zn Concentrations in Formation Water From the Culzean Field: Real or Artefact?” and is co-authored with Stuart Brice and Andrew Chalmers of Maersk Oil North Sea UK Ltd (view abstract here).

The second is co-authored with Kari Ramstad, Henriette Dorthea Aarrestad, Siv Kari Lien, Øystein Sæther, and Rita Iren Johnsen of Statoil ASA and is entitled “Johan Sverdrup Field – Origin of sulphate-rich formation water and impact on scale management strategy” (view abstract here).

Links to the papers will be posted after they have been presented.

McCartney et al. (2015) now available for download

The paper by McCartney et al. (2015) (‘Reactive transport modelling of mud filtrate invasion during drilling and application to mud contamination corrections on formation water analyses’), presented at the 26th International Oilfield Chemistry Symposium, Geilo, Norway, 22-25 March, is now available for download from our website.

LPS presentation now available for download

The presentation given by Ross McCartney (‘Are your formation water analyses representative?’) at the London Petrophysical Society Seminar, “Reservoir Fluids”, 11th December 2014, is now available for download from our website.

Shale gas? Tight gas sands? How we can help…..

Our services are also applicable to unconventional resources.  Why not take a look at our new ‘Gas shale and tight gas sands’ page to find out how they can aid ‘frac’ planning, monitoring, water management, reservoir management, and scale management.