03451nmc a2200301 4500 20260520005605.0 260224s2001 xxu ing Inglés An Approach to Naturally Fractured Reservoir Characterization: Case Study, San Juan Formation, Orocual Field, Venezuela. SPE 69471 Dallas, Texas Society of Petroleum Engineers 2001 12/09/06 ; 17/07/01 For the first time, in Venezuela, a detailed, complete study of naturally fractured reservoirs using the recent technological advances was performed. Since the first drilled well within the very tight (5 mD) cretaceous sandstone (San Juan Formation) diagenetically highly cemented by quartz overgrowth, the existence of natural fractures was suspected due to high production rates (3000 bopd) after hydraulic fracturing an interest in fractures characterization became important for the field. Furthermore, these assumptions were growing with the analysis of pressure transient tests of several DST and Build-up surveys, which have shown double-porosity behaviour. During the drilling it was frequently observed strong lost of circulation at several depths within the San Juan Formation. Orocual Field, within El Furrial Trend, located in North Monagas area, East of Venezuela, is structurally a Fold Propagation Fault resulting in anticlines associated with thrust faults. San Juan Formation, a complex barrier island deposits, bearing condensated fluids (41° API) is the most important reservoir within Orocual Field. Cores and Well Logs provided the basis to strongly confirm the presence of a fracture network within the reservoir. With the use of recent technological advances (core scanning and imaging, side-by-side display) which permits a detailed core-log calibration and integration, a NNW-SSE orientation of the fractures observed and measured in the cores was possible, the findings are consistent with the regional tectonical stress. Integrated analysis with breakouts borehole image processing, 3D seismic structural interpretation, in-situ stress measurements and second derivatives maps yield us to establish the first maps of fractures orientation and density. Parameters such as aperture, spacing, density, length and angles have been measured to define patterns and tendencies that it will feed the simulated dynamic fractures model. A better understanding of the historical production behaviour has been reached and a simulated, geostatistical fractures modelling is under development to establish correlative trends matching between production and fractures network orientation, density and dynamical properties of the fractured system. CONGTP Dorta, G. 6094 Boujana, M. 6095 Zerpa, L. 6096 Ramonez, M. 6097 Velasquez, C. 6098 Latin American and Caribbean Petroleum Engineering Conference (7th : 2001 mar. 25-28 : Buenos Aires, Argentina) 5738 Boujana, M. 6095 Zerpa, L. 6096 Ramonez, M. 6097 Velasquez, C. 6098 Latin American and Caribbean Petroleum Engineering Conference (7th : 2001 mar. 25-28 : Buenos Aires, Argentina) 5738 Dorta, G. 6094 130973 130973 https://biblioteca.iapg.org.ar/ArchivosAdjuntos/LACPEC2001/Spe69471.pdf 0 0 0 0 201895 BVIAPG BVIAPG 2026-03-03 200003024 0 200003024 2026-03-03 01:41:06 2026-03-03 ARCHIVO