Abstract

Many changes in drilling technique have been made during the development of the Gomez Field in Pecos County, Texas. These changes have reduced the time required to drill and complete a deep Ellenburger gas well to less than 50% of that required in the early development stage of this field. Detailed well planning, thorough supervision, and continual effort to improve each phase of the operations involved have been instrumental in creating these changes. Improved drilling fluids and bit designs have contributed significantly to the reduction in time and money necessary for such drilling.

Introduction

Since completion of the discovery well in the Gomez Field in October, 1963, a total of 50 wells have been completed and 14 wells were being drilled as of February 1, 1970. Not only is Gomez the world's deepest commercial production, it is by far the largest concentration of wells producing from below 20,000 feet. Although development is not yet complete, average well costs in excess of 1.5 million dollars represent an enormous investment by the operators in this field. Possibly of more interest to operating personnel are the improvements in techniques, tools, and materials that have evolved from this program. Substantial improvements in drilling techniques have been made during the development of this field. An average well is now drilled to total depth in 150 days, or less, as compared to 350 to 400 days required in the beginning of this development program. Well (costs have decreased in program. Well (costs have decreased in relation to the number of days required to drill.

CURRENT PRACTICES

Gulf is a major operator in the Gomez Field, and the following discussion pertains to Gulf's experience and present operating procedures which are present operating procedures which are not significantly different from those employed by other operators in the field.

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