Programming Reservoir Problems on the Electric Analyzer
- Mary Barrett (U. of Colorado) | Walter Rose (U. of Colorado)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- March 1956
- Document Type
- Journal Paper
- 57 - 59
- 1956. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.3.4 Scale, 2.4.3 Sand/Solids Control
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The conventional way to program reservoir problems for solution on the electric analyzer is one which concentrates the block units towards the inner radius of the prototype system being represented by the analog model.
Present Programming Method
While this conventional way of programming problems is quite adequate for routine uses of the electric analyzer, it leads to difficulties in those cases where the inner radius of the prototype system (e.g., the wellbore) is small compared to the external radius (e.g., the external reservoir boundary). To handle such a case by the conventional method would require either that a large value be selected for the constant a or that a large number n, of radial block units be chosen. In consequence, the capacitance and vertical resistance ratios become impossibly large, as will be evident from the relations, given above. In any event, the size of the smallest and largest capacitors will always be limited by the size of commercially available components, and the analyzer itself will determine how many mesh points are available for radial block units.
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