An experimental study of silicate-polymer gel systems to seal shallow water flow and lost circulation zones in top hole drilling


Ay A., Gucuyener I. H. , KÖK M. V.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, vol.122, pp.690-699, 2014 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 122
  • Publication Date: 2014
  • Doi Number: 10.1016/j.petrol.2014.09.011
  • Journal Name: JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.690-699
  • Keywords: drilling, gel, silicate, lost circulation, water flow

Abstract

Shallow water and lost circulation are frequently encountered problems during drilling top holes of oil and gas wells. Plenty of methods have been applied to overcome these problems. Among these methods, silicate based gels are one of the oldest. For this study, Sodium-Silicate based gel system is investigated experimentally and several aspects of the system are improved for efficient field applications. This improved gel system is deliberately delayed, multi-component system to be mixed as a uniform liquid at the surface facilities but desired to form gel structure where it is placed in the well. Gel slurries are composed of distilled water, Sodium-Silicate solution, polymer solution, lost circulation materials, weighting agent and organic initiator (initiating the gelation). In this study, effect of these components on gel time, gel quality and gel strength at room temperature is investigated as a function of their concentration.