Technological and technical solutions to improve well construction quality and productivity
- 1 — G.V. Plekhanov Saint Petersburg Mining University
- 2 — G.V. Plekhanov Saint Petersburg Mining University
- 3 — G.V. Plekhanov Saint Petersburg Mining University
Abstract
The main task of the research was to select formulations of plugging compositions, providing formation of wellbore structures in the productive formation by artificial filters with specified properties. Despite the urgency of the problem, no special plugging materials have been created for this purpose. A polyurethane hydrophilic pre-polymer curing only in the presence of water has been tested as a raw ingredient for the binder. Hydrate-free salts were used as soluble fillers, and building sand served as a filler. The strength characteristics were determined by the compressive stress at a strain of 10%, the ultimate strength and permeability depending on the component composition according to the Gibbs-Rosembaum diagram. It is shown that the permeability of plugging stone increases with the increasing volume of erosible substance, and if the volume of erosible substance is equal, the permeability decreases with the increasing fraction of the filler, but the strength properties do not change much. The carried out researches testify to the technical possibility of creation of face design with the set parameters of strength, permeability and wettability when opening the unstable oil reservoir.
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