Análisis litológico para incremento de la tasa de perforación en la cuenca oriente Ecuador
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Universidad Industrial de Santander
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Se evaluará la tasa de perforación y la trayectoria de los pozos en estudio a partir de la información litológica, los esfuerzos regionales y la estabilidad en la cara del pozo para adaptar las trayectorias a la litología regional de forma tal que se aproveche de las características de la misma para mejorar la perforabilidad e incrementar la tasa de penetración.
Este artículo expone lo desafiante que resulta alinear todas las variables geológicas y disponerlas de manera que permitan optimizar la perforación por cuanto existe un interés puntual dentro del reservorio desarrollado y planteado por los ingenieros de yacimientos, el mismo que en ocasiones impide aprovechar la orientación de los esfuerzos principales en la cara del pozo, así como los esfuerzos regionales de la zona perforada. Al establecer una relación entre la litología, las características geomecánicas, los problemas al perforar y la tasa de penetración de los pozos analizados se determinó aquellos parámetros que permitieron en cada sección del pozo incrementar la tasa de perforación como respuesta a una mejor adaptación de la geología regional.
El trabajo incluye sugerencias de las posibles direcciones que podría tomar un pozo basados en los diagramas polares de estabilidad lo que conjuntamente con una trayectoria perpendicular a los esfuerzos regionales propiciaría un incremento en la tasa de penetración.
The drilling rate and the trajectory of the wells under study will be evaluated based on the lithological information, regional efforts and stability on the face of the well to adapt the trajectories to the regional lithology, thus taking advantage of the characteristics in respect thereof to improve the drivability and increase the penetration rate. This article exposes the challenge of aligning all the geological variables and arranging them in a way that optimizes drilling, as there is a specific interest within the reservoir developed and proposed by reservoir engineers, which sometimes prevents taking advantage of the orientation of the main efforts on the face of the well, as well as the regional efforts of the perforated area. When establishing a relationship between lithology, geomechanical characteristics, drilling problems and the penetration rate of the wells analyzed, parameters were determined that allowed each section of the well to increase the drilling rate in response to a better adaptation of the geology. The paper includes suggestions of the possible directions that a well could take based on polar stability diagrams, which, together with a trajectory perpendicular to regional efforts, would lead to an increase in the penetration rate.
The drilling rate and the trajectory of the wells under study will be evaluated based on the lithological information, regional efforts and stability on the face of the well to adapt the trajectories to the regional lithology, thus taking advantage of the characteristics in respect thereof to improve the drivability and increase the penetration rate. This article exposes the challenge of aligning all the geological variables and arranging them in a way that optimizes drilling, as there is a specific interest within the reservoir developed and proposed by reservoir engineers, which sometimes prevents taking advantage of the orientation of the main efforts on the face of the well, as well as the regional efforts of the perforated area. When establishing a relationship between lithology, geomechanical characteristics, drilling problems and the penetration rate of the wells analyzed, parameters were determined that allowed each section of the well to increase the drilling rate in response to a better adaptation of the geology. The paper includes suggestions of the possible directions that a well could take based on polar stability diagrams, which, together with a trajectory perpendicular to regional efforts, would lead to an increase in the penetration rate.