[First Hit]

Datapages, Inc.Print this page

Characterization of Previous HitFlowNext Hit Previous HitUnitsNext Hit in Shaly Sand Reservoirs: A Case Study—Hassi R’Mel Field, South of Algeria, North of Africa

 

Aggoun, Chawki Redha, Yassine Amokrane, Salime Kaouche, Sonatrach, Hassi R’Mel, Laghouat, Algeria

 

The concept of hydraulic Previous HitflowNext Hit Previous HitunitsNext Hit (HFU) as viewed by Tiab and Amaefule et al was first initiated in the industry for the aim of permeability prediction in uncored intervals. This con­cept is strongly related to the Previous HitflowNext Hit zone indicator (FZI), which is assumed to be the unique parameter that can distinguish between HFU. However, so far almost all work using this con­cept use RQI Versus PHIz plots to identify Previous HitflowNext Hit Previous HitunitsNext Hit regardless of depth which leads in some instances to locate the same Previous HitflowNext Hit Previous HitunitsNext Hit in non adjacent horizons . Hence some ques­tions can be aressed, such as: (1) how can we determine the location of the Previous HitFlowNext Hit Previous HitUnitsNext Hit? (2) Is the Previous HitFlowNext Hit Zone Indicator (FZI) sufficient to characterize them? (3)Is it possible to deter­mine Previous HitFlowNext Hit Unit pattern? If yes, then how? And (4) what kind of information can bring such a characterization?

This work is devoted to answer these questions and to characterize Previous HitFlowNext Hit Previous HitUnitsNext Hit in shaly sand reservoirs using the stochastic approach in a section of the Oil Rim of Hassi R’Mel field (South of Algeria, North of Africa).

In this study, we have first characterized shale by the determination of its amount, type and form of deposition. A new correlation was proposed to determine horizontal permeabil­ity in uncored intervals. Using available data, very acceptable correlations to estimate verti­cal permeabilities were found. Combining geological Previous HitunitsNext Hit with FZI Layering, it was possible to identify and locate Previous HitflowNext Hit Previous HitunitsNext Hit depth wise, giving birth to a new practical FU definition. Using the estimated vertical permeabilities a new Previous HitFlowTop Zone indicator notion (FZIv) was introduced. Geostatistical techniques of Sequential Gaussian Simulation was used to obtain 3 equiprobable realizations of the reservoir attributes such as porosity, horizontal and verti­cal permeabilities, shale volume, FZI and FZIv.