Assuming the reservoir rock has a porosity of 12%, the water saturation is 30% and the reservoir thickness is 15ft. How many acres does the reservoir cover? (c) Using the following production data from a gas field estimate: i) The future production down to a rate of 70 MMScfd ii) Instantaneous (nominal or continuous) decline rate iii) Effective monthly and annual decline rates [2+1+2] Production Data q (mmscfd) Gp (MMMScf) 10 200 210 20 190 30 193 60 170 100 155 150 130 190 123 220 115 230 110 240 105 250