The strategy of taking into account the lateral heterogeneity of the PK13 reservoir during geological support of horizontal wells drilling at the Vostochno-Messoyakhskoye field

Abstract

Existing approaches to drilling wells in homogeneous reservoirs implies a common strategy based on more not from Geology, but primarily from technological factors. However, these «easy» deposits are already at a late stage of development, and many of them have already passed this stage. In this regard, all the more difficult deposits are put into operation, the development of which previously was not possible. One of these is the Eastern-Messoyakhskoye field and its main object of the development (PK13 layer), continental Genesis of sediments, which implies a large number of heterogeneities and uncertainties. Continental sediments are some of the most complex geological objects from the development point of view. Reserve recovery is largely determined by the efficiency of drilling and the selected concept of horizontal wells. The lack of reliable trends within the Eastern-Messoyakhskoye field to predict the reservoir distribution with a high degree of heterogeneity, lateral and vertical, as well as the nature of saturation, requires a constant response to data that can significantly change concept about the architecture of the reservoir. In this regard, the presence of dynamic drilling strategy is an integral part of a successful process of geological monitoring. The article describes the role of the account the lateral heterogeneity of the continental deposits, updating of the strategy of drilling and prediction of the occurrence of the formation. The aim of this work is .to describe approaches for the selection of the most optimal arrangement of wells in the planning of drilling, taking into account the constantly updated geological information about the reservoir.