Estudio de la configuración geológica del Miembro M-1 de la Formación Napo y su afectación en la producción de crudo, en un campo en el Noreste del Oriente Ecuatoriano

Abstract

The project was generated in order to recognize the deposits that comprise M-1 Sandstone and its relation with the fault located west of the area. To achieve the proposed objectives in this study, the bases and tops of M1 sandstone were determined in all wells this allowed to create sandstone thickness maps and identify the min stratigraphic marks. These maps displayed a NE-SO deposition direction, a sediment supply source located in the northeast. High clay content toward the west is remarkable. The L marker was used as a regional stratigraphic marker; consequently this horizon served as a datum for flattening the seismic lines and observes the geometry of the M1 reservoir. Furthermore, clinoforms geometries were identified, which proved the progradational origin of the M1 sandstone. In addition, kaolinite sandstones were distinguished with gamma ray spectral data and displayed salt and fresh water coexistence in the wells near the shoreline. The geometry of M1 sandstone deposition was proved with seismic, and it also revealed the presence of an antiform which is limited by a fault zone to the western. Moreover, it is evident that the fault was formed subsequent to the sandstone deposition. Finally, to confirm this result, pressure data of the M reservoir obtained from nearby wells were plotted to identify pressure within the reservoir, which are interpreted as compartamentalization of the M1 reservoir, typical of deltaic reservoirs.