Perforating High-Temperature Wells
- W.T. Bell (Schlumberger Well Surveying Corp.) | G.A. Auberlinder (Schlumberger Well Surveying Corp.)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- March 1961
- Document Type
- Journal Paper
- 211 - 216
- 1961. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.1.2 Separation and Treating, 2.2.2 Perforating, 1.6 Drilling Operations
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The recent achievement of new records in well depths has presented a new set of problems to the perforating industry. Resulting extremes in pressures and temperatures have pointed up the limitations of existing tools and explosives, thereby imposing new challenges for equipment and techniques.
This paper describes some of the major problems stemming from deep-well mud pressures and temperatures. Proper techniques for measuring bottom-hole temperatures are discussed. Thermal limitations of currently used wire-line explosive tools and components are emphasized along with recommended ratings and specialized operating techniques. Misconceived notions relating to the capabilities of conventional explosives are treated.
An answer to the trend to deeper wells with higher pressures and temperatures is introduced in the form of a newly developed, high-temperature explosive package for the steel retrievable shaped-charge gun.
The extreme bottom-hole temperatures and mud pressures of today's deeper wells present new problems for the perforating industry. As deep tests continue to explore the earth, constant development of equipment and refinement of techniques are required to keep abreast of steadily mounting pressure-temperature conditions.
Deep-well drilling surged upward during the early 1950's. In 1952 less than 10 wells were producing from deeper than 15,000 ft. In 1959 alone, 63 new producers were completed below that depth. Drilling and producing depth records have shown a steady trend upward, resulting in a maximum drilling depth of 25,340 ft, with the deepest successful completion recorded at 20,745 ft.
Should this general trend be maintained, the wireline service industry will, within a few short years, be faced with high pressure and temperature completion problems taxing the capability of existing tools and lab-test facilities.
|File Size||1 MB||Number of Pages||6|