Comparative research of filtration reducers based on carboximethyl esters of starch and cellulose in modern drilling mud systems

Konstantin M. Minaev, Vyacheslav A. Yanovsky, Daria O. Minaeva, Aleksey S. Zakharov, Rashid R. Sagitov, Mikhail O. Andropov, Sushil K. Pandey

Research output: Contribution to journalArticle

Abstract

The importance of the research is related to the need to reduce the cost of polysaccharide reagents used in drilling fluids, and, therefore, the cost of well construction. This line of research will allow determining the field of application of reagents based on carboxymethyl starch in modern mud formulation. The aim of the research is the prospect of using carboxymethyl starch in modern drilling mud as a filtration reducing agent and an alternative to low-viscosity polyanionic cellulose reagents and evaluating the stability of drilling fluids using these reagents to salt effects, temperatures and biological degradation. Objects: modern systems of polymer-clay, mineralized polymer-clay and biopolymer drilling fluids containing filtering reducers based on carboxymethylated cellulose and starch. Research methods: instrumental methods for determining drilling muds parameters according to State Standard 33213-2014 and guidance document RD 39-00147001-773-2004 (filtration and rheological properties); properties of polysaccharide reagents according to ASTM D1439-15. Results. The authors have carried out the comparative studies of polymer-clay and biopolymer drilling muds using carboxymethyl starch and low viscosity polyanionic cellulose as filtering reducers. It is shown that drilling muds using low viscosity polyanionic cellulose have greater plastic viscosity and dynamic stress, but the structural and mechanical properties of drilling muds are higher when introducing carboxymethyl starch. The latter, as a filtration reducer, has low efficiency in mineralized drilling fluids, while at low temperatures it provides a virtually equal filtration in polymer-clay and biopolymer solutions, in comparison with polyanionic cellulose. It is determined that carboxymethyl starch can be used as an alternative to low viscosity polyanionic cellulose in polymer-clay and biopolymer drilling muds when drilling wells with moderate bottom hole temperatures.

Original languageEnglish
Pages (from-to)57-66
Number of pages10
JournalBulletin of the Tomsk Polytechnic University, Geo Assets Engineering
Volume329
Issue number5
Publication statusPublished - 2018

Keywords

  • Carboxymethyl cellulose
  • Carboxymethyl starch
  • Drilling mud
  • Filtration reducer
  • Polyanionic cellulose

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Waste Management and Disposal
  • Economic Geology
  • Management, Monitoring, Policy and Law

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