Results of pilot project of water coning prevention treatments using thermogelling compositions

Abstract

Introduction. Results of five years pilot project of thermogel using for water coning and rapid watercut preventing treatments in Zapadno-Hosedauskoe field wells are presented. Zapadno-Hosedauskoe field is massive deposit of carbonate reservoir with high vertical permeability and underlying water.

Aim. The aim of investigation is summing up and efficiency estimation of water coning preventing treatment pilot implementations.

Methods. For coning evaluation Chan’s diagnostic plots and well flow profile were used. For additional oil production estimation base production trends were used.

Results. The pilot project has been realized at Zapadno-Hosedauskoe fi eld from 2019 to 2023. During this period, 34 treatments were executed, additional success criteria was determined, well candidates selection, treatment planning and effi  ciency estimation method was formulated, different compositions and various injection volumes were tested, different kinds of well intervention were applied, and also repeated and preventive (before putting of well on production) treatments were completed. Additional oil production due to pilot project realization is more than 270 000 tons.

Conclusions. Authors showed results of five years water coning prevention treatments pilot project, determined success well candidate criteria and estimated additional oil production.