Fracturing at High Injection Rates, Spraberry Trend Area Field
- Thomas P. Brooks (Southern Production Co.) | Percy C. O'Quinn (Southern Production Co.) | Warner E. Life (Southern Production Co.)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- May 1955
- Document Type
- Journal Paper
- 14 - 17
- 1955. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 5.8.5 Oil Sand, Oil Shale, Bitumen, 2.2.2 Perforating, 2.4.3 Sand/Solids Control, 1.6 Drilling Operations, 3 Production and Well Operations, 5.2.1 Phase Behavior and PVT Measurements, 4.1.2 Separation and Treating
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The application of relatively large volume fracture treatments using anoil-sand mixture at high injection rates in wells completed in the Spraberryformation has indicated improved drainage from the matrix rock. This isconsidered to result from enlargement of existing open fractures, possibly fromopening of fractures not previously effective, and breaking down existingblockage in the vicinity of the well bore. The results of this type oftreatment as applied to a group of wells in the Spraberry Trend Area field arediscussed with reference to well performance and economics.
Extremely small return on investment in a group of wells drilled in theSpraberry Trend Area field called for concerted effort toward stimulation ofproduction. Production history indicated that original recoverable reservefigures were inordinately above ultimate recoveries which could then beforeseen. Many wells were facing abandonment with subsequent writeoff ofreserves if means of restoring them to production were not forthcoming. Otheroperators were experimenting with means of increasing recovery, such as waterimbibition, but results would not be known for some time. Satisfactory resultsachieved from formation fracturing by injecting oil-sand mixture at high ratesin other areas indicated possible results from such treatment in the Spraberryformation. Particular similarity was noted between the Spraberry formation anda reservoir in Wyoming-both having low permeability, vertical fracturing, andinterbedding with shales. Fracturing of the formation in Wyoming using highinjection rates had been and was then being practiced with satisfactoryresults. The decision to apply this fracturing technique experimentally to onewell and the results of this initial treatment have led to numerous wells beingfractured in this manner.
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