Waterflood-induced fracture or "Two-Step-Rate-Test" to improve reservoir injectivity

Abstract

Low permeability reservoirs (less than 1 mD) are developed by intensive waterflooding. The agent is injected at pressures higher than the fracturing pressure, so that in almost every well involved in this procedure, there is spontaneous growth (injection) of artificial fractures in different directions with different characteristics, and so on. The relevance of the topic is due to a new procedure called two-stage reservoir injectivity enhancement using multiple injection modes, this technique is used to determine the test fluid injection pressure at which fracture growth will occur. The problem of this study is to increase the injectivity of the injection well in order to increase fluid production. The aim and purpose of the work is the process of increasing the injectivity of injection wells by "steps" (Step-Rate-Test is SRT): a study of the Tevlinsko-Russkinskoye field. The moment of autofracturing is determined by SRT and not by injectivity. The method of interpretation is plotting. The difference between SRT and 2-SRT is considered, the 2-SRT well treatment is carried out, the efficiency of the applied method and the results of the work are presented.