USING A PERFORATION PERFORMANCE MODEL (PPM) AND EXTREME UNDER-BALANCE (EUB) PERFORATING TO MAXIMIZE THE ASSET VALUE IN DEEP, LOW-POROSITY, LOW -PERMEABILITY GAS RESERVOIRS - A CASE STUDY
The extreme under-balanced (EUB) perforating technique has proven effective in deep, low porosity and low-to-medium permeability formations. The state-of-the-art scientific software for perforating performance modeling (PPM) can be effectively used in predicting the perforation performance in a wide variety of scenarios and to compare actual post-job details to make decisions according to economic benefits for various perforating techniques. As with any software modelling, a good grasp of the reservoir rock properties and fluid properties are essential as input parameters. The success of the EUB perforating performance and the capability of the PPM to successfully predict the well deliverability has increased confidence in effective candidate selection. Predictions from the PPM are within +/- 10% of the measured post-job results observed. The paper presents various cases that show how effectively and economically these deep sandstone formations can be completed to maximize the return on investment (ROI) and the rate of return (ROR).