Optimization of drilling fluid rheological and fluid loss properties utilizing PHPA polymer

Vassilios C. Kelessidis, Maria Zografou, Vassiliki Chatzistamou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

Drilling fluids with bentonite can often cause major problems such as flocculation, loss of rheology control and excessive friction due to high clay concentration. Polymers can mitigate such problems, but all these come with much higher costs. Partially hydrolyzed Polyacrylamide (PHPA) polymers are used as additives to bentonite water based fluids to stabilize shales and in HTHP applications because of better thermal stability (PHPA). It also acts as coating on cuttings preventing agglomeration minimizing fluid loss and aiding cuttings transport. There is not much published information about PHPA optimum concentration and its mode of action and we aim to identifying these and we attempt to explain the effectiveness for achieving better design of drilling fluids. Four bentonite (2%, 3%, 4%, 5%) and five polymer (PHPA) concentrations (0.05%, 0.1%, 0.3%. 0.5%, 0.7%) were used. The rheological behavior was described very well by the Herschel-Bulkley model. PHPA addition resulted in increase of apparent viscosity, large decrease of the yield stress and in great reduction of the fluid loss and models are presented for such behavior. The morphology of the filter cakes was investigated using Scanning Electron Microscopy in order to understand the adsorption of the polymer onto the clay particles. We try to explain the effectiveness of polymer addition and its mode of action, which further enhances our understanding of the polymer-clay interaction. This work aids into formulating better water-based fluids for such applications using optimal polymer concentrations. Better understanding of the mode of interaction of the PHPA additive with clay particles in drilling fluids has been achieved by in-depth analysis of the effect of various concentrations on rheological and filtration properties of drilling fluids. This allows industry to work with optimal PHPA concentrations for more efficient drilling.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - 18th Middle East Oil and Gas Show and Conference 2013, MEOS 2013
Subtitle of host publicationTransforming the Energy Future
PublisherSociety of Petroleum Engineers (SPE)
Pages1591-1598
Number of pages8
ISBN (Print)9781627482851
Publication statusPublished - 1 Jan 2013
Event18th Middle East Oil and Gas Show and Conference 2013: Transforming the Energy Future, MEOS 2013 - Manama, Bahrain
Duration: 10 Mar 201313 Mar 2013

Publication series

NameSPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings
Volume3

Other

Other18th Middle East Oil and Gas Show and Conference 2013: Transforming the Energy Future, MEOS 2013
CountryBahrain
CityManama
Period10/3/1313/3/13

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

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  • Cite this

    Kelessidis, V. C., Zografou, M., & Chatzistamou, V. (2013). Optimization of drilling fluid rheological and fluid loss properties utilizing PHPA polymer. In Society of Petroleum Engineers - 18th Middle East Oil and Gas Show and Conference 2013, MEOS 2013: Transforming the Energy Future (pp. 1591-1598). (SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings; Vol. 3). Society of Petroleum Engineers (SPE).