Integration of Formation Evaluation Domains for an Optimized Perforating Design

Abstract

Petroamazonas EP is the national oil company in Ecuador. It holds most of the oil concessions Onshore and Offshore in the country. The oil and gas production targets require implementing advanced analysis that provides effective results on production. In order to analyze and predict the well Productivity, it is necessary to perform an appropriate perforating analysis; this can be achieved integrating Petrophysics, Geomechanics, Reservoir and Production Domains. For an advanced Perforating design a clear understanding of rock characteristic, depth of damaged zone and reservoir behavior is used in the Perforating simulation. This enhances the right selection of charges and ensures they will overpass the altered zone. Step by step procedure is described: Petrophysical evaluation and rock strength of the formation of interest. Quantification of alteration depth. Display the penetration profile. All this previous steps are used in order to obtain a detailed Flow Profile. To identify and select with the Flow Profile the better zones to produce. A sensitivity analysis is performed to select the best scenario for a technical and economic decision. This methodology was implemented in two of the key Petroamazonas EP assets, which are Amistad Offshore Gas Field, and Apaika Onshore Oilfiled. This helped to optimize and predict the productivity of the wells. The following conclusions were obtained once the wells were on production: Selection of the better intervals to produce Low Uncertainty of well productivity prediction Confirmed effective communication between borehole and reservoir Skin reduction due to a better perforating selection and design Optimized completion design Making proper decisions when analyzing project cost versus production.