Authors : Mariia Vladimirovna Nutskova, Mikhail Vladimirovich Dvoynikov and Vyacheslav Nikolayevich Kuchin
Abstract: The aim of this study is to increase the efficiency of well completion during water inflow using a Viscoelastic Liquid Mixture (VLM) for isolation of permeable horizons. With the increase in the share of drilling in complex conditions such as permafrost, abnormal reservoir pressure, abnormally high reservoir temperatures, unstable rocks (prone to landslides, plastic deformation), rocks with high hardness, etc., the technology of constructing wells also complicates. One of the main issues is isolating the aquifers from which the water breaks through to the producing wells, significantly increasing water cut. To limit the water inflow exists various components: cement slurries, gel-cement slurry, synthetic resin, viscoelastic compositions, swellable polymeric mesh, latexes, materials with a condensed solid phase, materials for selective isolation, etc. For low reservoir pressures, a significant role in the selection of drilling and grouting mortars is played by density and therefore to temporarily block permeable aquifer it’s appropriate to use viscoelastic screen-based three-phased stabilized VLM having a low density. The following article analyses domestic and foreign field experience in insulation of permeable formations with different components, researching three-phased blocking components and summarizing their requirements.
Mariia Vladimirovna Nutskova, Mikhail Vladimirovich Dvoynikov and Vyacheslav Nikolayevich Kuchin, 2017. Improving the Quality of Well Completion in Order to Limit Water Inflows. Journal of Engineering and Applied Sciences, 12: 5985-5989.