The formation evaluation of the unconventional tight sand reservoirs is challenging at different points of view, where several factors affect the recording and make their evaluation and the potential in place assessment hard to define. That’s why, the new technologies and customized workflows that are being applied in such reservoirs are greatly helping in decreasing the uncertainties encountered at different levels of the unconventional tight sand reservoirs lifecycle. One of the milestone steps is the formation fluids identification and sampling. In the past, the selection method of the intervals for formation fluids sampling using the MDT tool was based on conventional well logging analysis and more precisely on selecting intervals with high porosity compared to other intervals. However, this method has shown its limitations in tight reservoirs due to the low porosity and low permeability. For that reason, Schlumberger has established a new customized workflow known as ‘Fracture Ready Package’ in order to optimize formation fluids sampling program, which consists on an orientation to the characterization of natural fracturing which represents a major element in tight reservoirs cases. This methodology consists of the combination of acoustics (Sonic Scanner) and borehole image services to conduct a complete and detailed natural fractures characterization, namely: type of fracture (open fracture, semi open, closed cemented fracture) orientation and the exact location of the fracture and most important, analyze the continuity of the fracture far from well wall by analyzing anisotropy using sonic scanner tool.
Presentation Date: Monday, October 12, 2020
Session Start Time: 1:50 PM
Presentation Time: 3:05 PM
Location: 360D
Presentation Type: Oral
