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Evaluation of opening of fractures in the Logovskoye carbonate reservoir, Perm Krai, Russia

Petroleum Research 2021年第2期6卷 137-143页

作者： Dmitriy A.Martyushev Alexey Yurikov Department of Oil and Gas Technologies Perm National Research Polytechnic UniversityPerm614990Russia WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerth6151Australia

The development of naturally fractured carbonate reservoirs is extremely challenging. Such reservoirshave a dual pore structure consisting of low-permeable matrix with large pore volume and highpermeable fractures constituting main paths for fluid flow. Productivity of wells drilled in such formations tends to decrease rapidly due to the drop in the reservoir pressure and closure of ***, it is crucial to monitor opening of fractures for the effective development of carbonate reservoirs. Three methods for monitoring of opening of fractures including tracer indicators method,Warren and Root method and Victorin’s empirical relation, are applied in the Logovskoye oil reservoir, acarbonate Tournaisian-Famennian formation in Upper Kama Region, Perm Krai, Russia. The threemethods provide reliable estimation of the opening of fractures, which match the reported laboratorydata obtained on thin sections of core samples. The limitations of each method are also discussed. Thetracer indicator method is time-consuming, the Warren and Root method includes hydrodynamic studiesand requires shutdown of wells influencing the oil production, and the application of Victorin’s relationrequires estimation of initial opening and current compressibility of fractures, which can be done usinganalysis of cores or tracer indicators studies. The appropriate method for monitoring of opening offractures should be chosen according to available resources, time, and economic targets of the development project.

关键词： Carbonates Well tests Tracer indicators Warren and Root method indicator injection

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