Complex interpretation well logging, marker test and seismic data for correct segmentation of horizontal wells in carbonate fractured reservoir

DOI: 10.24412/2076-6785-2024-1-24-29

Abstract
When developing oil rims, horizontal wells with an intelligent completion system are widely used, including wellbore segmentation and installation of automatic inflow control devices. When segmenting, a uniform arrangement of casing packers along the wellbore is often used, the main disadvantage of which is the high risk of loss of tightness when installing the packer into the fractured zone of the reservoir. The paper presents an approach based on the complex interpretation of well and seismic data for predicting zones of increased open fracturing along of design horizontal wells in a carbonate cavernous-fractured reservoir for the purpose of their correct segmentation. This will exclude the risks of leaky planting of casing packers, prevent breakthrough of an undesirable phase (gas, water) to the wellbore during its production and to increase the efficiency of selective stimulation of highly fractured. Dynamic modeling confirmed the effectiveness of the proposed approach.

Materials and methods
The analysis of well logging, marker test made it possible to identify fractured zones along the horizontal hole wells and prove the conductivity of these zones. Attribute analysis of seismic data allows to determine fracture zones, but does not provide information about their conductivity. A complex analysis of well logging with seismic data allows to select attributes for forecasting possible areas of increased fracturing along planned horizontal hole in order to effectively segment design wells with automatic inflow control devices.

Keywords
segmentation of horizontal wells, fracturing, inflow control devices, attribute analysis, UBI microimager, marker test, casing packer