«Gazprom Neft» - the leader of the competence of a multi-stage refracturing

Abstract

Multi-stage hydraulic fracturing (MSF) in horizontal wells is an effective method of increasing well productivity. The increase in the area of contact of the well with the reservoir allows to maximize the previously not involved in the development of the reservoir intervals, to increase its oil recovery. The development of this technology is facilitated by the depletion of the resource base of high and medium-sized oil reserves and the need to involve hard-to-recover reserves, the boundary zones of the fields. The technology MSF is selective stimulation in horizontal open hole reservoir, sequential creation of fractures fixed by the wedging agent (proppant), or treatment with acid compositions The selectivity of stimulation and division of the horizontal section into zones is carried out through the use of special configuration a liners. During operation, the productivity of such wells begins to decrease over time. And today the issue of re-fracturing of horizontal wells with MSF is one of the most urgent problems for our Company. The accumulated experience with directional wells shows that the most effective method of recovery of productivity of wells with hydraulic fracturing after 3-5 years of operation is to conduct operations of repeated hydraulic fracturing.