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• W2056226721 abstract "A New Approach to Air-Hole Interpretation in the Canyon Sands of Central Texas R.P. Foret; R.P. Foret Schlumberger Well Services Search for other works by this author on: This Site Google Scholar W.F. Diggons; W.F. Diggons Schlumberger Well Services Search for other works by this author on: This Site Google Scholar L.M. Grace L.M. Grace Schlumberger Well Services Search for other works by this author on: This Site Google Scholar Paper presented at the SPE/DOE Low Permeability Gas Reservoirs Symposium, Denver, Colorado, March 1983. Paper Number: SPE-11619-MS https://doi.org/10.2118/11619-MS Published: March 14 1983 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Foret, R.P., Diggons, W.F., and L.M. Grace. A New Approach to Air-Hole Interpretation in the Canyon Sands of Central Texas. Paper presented at the SPE/DOE Low Permeability Gas Reservoirs Symposium, Denver, Colorado, March 1983. doi: https://doi.org/10.2118/11619-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Rocky Mountain Petroleum Technology Conference / Low Permeability Reservoirs Symposium Search Advanced Search Members SPE-AIMEAbstractThe Canyon Sands of Central Texas have been exploited by air-drilling techniques since the mid-1950's, and the activity level has increased because of tight gas prices and the prospect of eventual deregulation. This prices and the prospect of eventual deregulation. This paper introduces a new approach to air-hole interpretation paper introduces a new approach to air-hole interpretation which combines old and new techniques and provides additional information for the exploitation of this area.The Canyon Sands are characterized by low permeabilities, high clay content. and small amounts of permeabilities, high clay content. and small amounts of water production. Previous methods of evaluation include an FDC* Density/CNL Neutron log and a Temperature survey.Advances have been made in establishing an accurate neutron porosity, and the addition of an Induction log has allowed a Three-Perm Coriband* log to be computed. The Audio log is run in combination with the Induction log to confirm temperature anomalies and to find previously overlooked gas entries.This suite of logs ensures better treatment and, therefore, greater production. Well stimulation and design are further enhanced by Producibility logs. The overall air-hole package is the most up-to-date wireline method for the interpretation of air-drilled Las wells.IntroductionAir drilling occurs in several areas in North America and Canada and can be a fast and economical way to drill a well. Drilling in air-filled holes is possible only when the formations penetrated contain virtually water-free production. Figure 1 shows an area in Texas where a new, production. Figure 1 shows an area in Texas where a new, air-hole interpretation suite has been developed.In this area, a well is initially drilled to just below tile San Andres. At this depth logs can be run either in brine or in air. After surface casing is set, air drilling, continues at a every rapid rate. Drilling rates as high as 1500 feet per day are possible.Figure 2 illustrates the formations found in this area and their respective geological ages.The Canyon Sands are a primary objective in Central Texas. The Canyon formation is a series of interbedded sands and shales characterized by low permeabilities, high clay content, and tow water production. Hydrocarbon production is very dependent on the fracture system production is very dependent on the fracture system imposed by hydraulic fracturing. The sands are found at depths ranging, from 3000 to 8000 feet and may extend over a 1500-foot interval.Secondary objectives in the area are the deeper Strawn and Ellenburger formations. At these greater depths, oil or water is sometimes encountered during air drilling. If this occurs, most operators load the hole with brine and run a conventional logging program. This paper therefore focuses on the Canyon Sands. However, the method developed for the Canyon area is applicable to any gas-producing formation which is logged in air.During air drilling, a blooey line is installed which enables the operator to continually observe drilling, returns at the surface. The returns are a very fine powder which make conventional mud logging impossible. If gas is encountered while drilling it is ignited at the end of the blooey line. The resulting flare, its length, and the time it remains are factors the operator uses to determine the well's potential. Air drilling is very similar to a continuous drill stem test.P. 175 Keywords: induction log, well logging, temperature anomaly, air drilling, drilling, permeability, neutron log, gas entry, canyon sand, traditional approach Subjects: Formation Evaluation & Management, Open hole/cased hole log analysis This content is only available via PDF. 1983. Society of Petroleum Engineers You can access this article if you purchase or spend a download." @default.
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• W2056226721 title "A New Approach to Air-Hole Interpretation in the Canyon Sands of Central Texas" @default.
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