ПОВЫШЕНИЕ ЭФФЕКТИВНОСТИ ПРИМЕНЕНИЯ ТЕХНОЛОГИИ ПО ОГРАНИЧЕНИЮ ВОДОПРИТОКА НА ОСНОВАНИИ ГЕОЛОГО-ФИЗИЧЕСКИХ ХАРАКТЕРИСТИК ПЛАСТОВ (НА ПРИМЕРЕ МЕСТОРОЖДЕНИЙ ПЕРМСКОГО КРАЯ)

摘要

The relevance. Nowadays the increasing water cut of produced fluid could be the main cause to stop well exploration. There are approximately 2500 production wells in Perm region. Nearly the third of them work with the water cut more than 70 %. Water shutoff treatment in producing wells could decrease water cut. The most common reasons for excess water inflow are water breakthrough in fractured rocks or highly permeable intervals of the layer, water coning, behind-the-casing flow or casing defects. High water cut could accelerate the corrosion and increase salt deposition, which is harmful for the submersible equipment. The formed water-oil emulsion burdens the gathering system and it is hard to break high volumes of this emulsion. It is possible to increase the effectiveness of water shutoff treatment in case of optimal geological conditions for existing technologies or optimized methods of technology selection. The main aim of the study is to increase the effectiveness of technologies for water shutoff treatment based on geological characteristics of reservoir. Objects: terrigenous and carbonate collectors of Perm region. Methods: laboratory tests of grouting compositions, filtration tests through core samples. Results. Each technology for water restriction is effective in narrow range of geological conditions, so the problem is relevant. In case of wrong choice of the technology, its effectiveness decreases significantly. It might also irreversibly damage the collector and the recovery could be expensive. The authors checked the basic geological and technological factors, which influence the effectiveness of water restriction in production wells. According to the research we formed recommendations for using the reviewed compositions for terrigenous and carbonate reservoirs in Perm region.