Patent ID: 8967249
Filing Date: 2015-03-03
Classification: E21B

Abstract:
1. A method for drilling a subterranean wellbore, the method comprising: (a) drilling the subterranean wellbore; (b) analyzing hydrocarbon gases acquired while drilling in (a) to obtain a log of hydrocarbon gas content and composition; (c) analyzing formation cuttings acquired while drilling in (a) to obtain a chemical composition of the cuttings, the chemical composition including at least one of a mineralogy of the cuttings, a kerogen content, and a kerogen maturity; (d) analyzing the formation cuttings acquired while drilling in (a) to obtain an estimate of surface area and pore volume of the formation cuttings; (e) analyzing the formation cuttings acquired while drilling in (a) to obtain elastic properties of the formation cuttings; (f) processing the log obtained in (b), the chemical composition of the cuttings obtained in (c), and the estimate of surface area and pore volume of the formation cuttings obtained in (d) to compute a reservoir quality index; (g) processing the elastic properties of the formation cuttings obtained in (e) to compute a completion quality index; (h) processing the reservoir quality index computed in (f) and the completion quality index computed in (g) to compute a number and position of fracturing stages for the subterranean wellbore.