Fracturing Evaluation Methodology in Carbonate Rocks During Oil and Gas Fields Prospecting

The problem of carbonate rocks study as well as their potential evaluation seems to be the most important aim. Discovery of great and unique oil and gas deposits in carbonate rocks related to different age and origin, considerable filtration and capacitive parameters variation, uncertainty of effective thickness determination has issued the challenge of new technique elaboration for reliable estimation of reservoir types and properties. Principal distinction of methodology used in VNIGNI for carbonate core study consist in using cubic core samples (with side 5 cm) and application of capillary defectoscopy. Ratio between fractures, cavities and pores filled with luminescent liquid or only fractures presence allows to estimate pore volume in carbonate rocks: distinguish layers with mainly pore channels or complex structures (simultaneous pores, cavities and fractures available) as well as rocks with system of fractures. Nature and morphology of hollow spaces determined by luminophore is rather diverse that permits to locate reservoirs of different types in section and evaluate fractures participation in filtration and porosity