Reasons of non-productive water injection identification at oil fields by temperature modelling

Typically, a reservoir pressure maintenance system with anumber of injectorsis a key factor in the oil field development. However, the volume of injected fluid does not always reach the target formation. Often, injected water is discharged into adjacent reservoirs due to crossflows, breakthroughs, fracturing, etc. In these cases, we can talk about nonproductive injection. Nonproductive injection is a frequent issue in oil fields, which leads to significant losses in both oil production and the money. Therefore, the study of methods for diagnosing and controlling nonproductive injection is an urgent task for many scientists. This paper provides an analysis of temperature modeling, on the basis of which it was possible to establish the regularities of fracture behavior during nonproductive injection and propose an approach to increase the information content of downhole temperature logging.