... of drilling in the world's deeper and more hostile waters. This will require very expensive and sophisticated equipment and a new breed of highly technical people to operate it. From the oil companies' standpoint, the cost of exploratory and development efforts will be very expensive. Major oil provinces...

... of each zone consists of several stages using 15% HCl acid. The number, size, and placement of the deep penetrating burr-free perforations is designed to produce good diversion of the acid into all intervals of interest within a zone. Four wells have been completed by HNG Oil Company using the dual...