Estimation of Developed Petroleum Reserves
- M. Albertson (Shell Petroleum Corporation)
- Document ID
- Society of Petroleum Engineers
- Transactions of the AIME
- Publication Date
- December 1936
- Document Type
- Journal Paper
- 13 - 17
- 1936. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 2.4.3 Sand/Solids Control, 5.7 Reserves Evaluation, 5.7.2 Recovery Factors, 4.2.3 Materials and Corrosion
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The purposes of this statement are to define a problem that exists in regardto the estimation of developed petroleum reserves, to analyze the problem in anabstract manner, and to discuss it as an introduction to certain papers thatfollow. The problem is to devise and develop a suitable procedure to permitmore accurate estimates of developed petroleum reserves. Part of the problem isto make such estimates available earlier in the life of any particularpool.
The problem of securing more accurate estimates of developed petroleum reservesexisted prior to curtailment of production. With curtailment, however, theproblem became acute, some of the more prominent reasons being asfollows:
1. The standard method of estimation depended on production decline curves.This method is inapplicable while curtailment prevails and available methodsare insufficient.
2. The retarding influence imposed by wide open flow conditions uponoverdevelopment is absent. Great losses of capital by overdevelopment can nowoccur before realization of the true situation occurs, or before effectivesteps can be taken to stop such wastage. This increases the need for early,accurate estimates.
3. Above-ground stocks have diminished and the equivalent of such supply tendsmore and more to be retained underground in the natural reservoirs. It becomesincreasingly necessary to know accurately the amount of these stocks.
To direct attention to an additional point of different nature: improvedaccuracy of reserve estimation can be obtained .only by closer scrutiny of thefactors that determine recovery. This examination and the resulting efforts tomeasure the effect of these factors in terms of ultimate recovery must tend toimprove ultimate recovery.
The statements regarding the acute nature of the problem also indicate to someextent the importance of the problem and the necessity of finding asolution.
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