By studying the production plans of some wells of Al Furat Petroleum Company, the researcher noticed that the rate of production increases to reach a peak and then falls back sharply. The deformation of the area around the well due to the decrease in the formation pressure (after production for a certain period) may have caused a change in the storage properties (porosity, permeability) and thus lower production rate. However, from the point of view of the geomechanics of the oil formation, which includes the study of the stress situation and its effect on the rock tissue, we will notice the presence of additional reasons that have a role in preventing the flow of oil towards the wells as in the case of the delamination in which the pores of the rock tissue are exposed to reduced porosity and its accompanying significant decrease in permeability and so it may be a direct cause of the retention of oil in the pores, thereby reducing the final yield is a big factor. Through this research, the researcher will provide an explanation of the possible causes for the drop in the production significantly with a good oil reserve remaining in the reservoir through the geomechanics of the oil strata, in which we will explain the effect of the effective stress resulting from the decrease in stratigraphic pressure in closing the produced field around the walls of the well. The research is of great importance in explaining the survival of approximately 50% of the total reserves in the reservoir and opens the way towards finding appropriate solutions to prevent the process of oil sequestration in narrow pores.
"Reasons why oil reserves remain unproductive-a case study,"
Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث: Vol. 9:
1, Article 4.
Available at: https://digitalcommons.aaru.edu.jo/aaup/vol9/iss1/4