Observations From Profile Logs of Water Injection Wells
- H.H. Kaveler (Phillips Petroleum Co.) | Z.Z. Hunter (Phillips Petroleum Co.)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- May 1952
- Document Type
- Journal Paper
- 129 - 134
- 1952. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.1.5 Processing Equipment, 5.8.5 Oil Sand, Oil Shale, Bitumen, 5.4.1 Waterflooding, 1.6.9 Coring, Fishing, 2.4.3 Sand/Solids Control, 6.5.2 Water use, produced water discharge and disposal, 4.3.4 Scale, 2 Well Completion, 4.1.2 Separation and Treating, 5.5.2 Core Analysis
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Variation of the horizontal permeability (parallel to the bedding plane) in the vertical section of reservoir rocks has long been observed as a characteristic of a normally heterogeneous system which reservoir rock represent.
The use of a recently developed water injection profile device offered opportunity to measure with a high degree of reliability the rate of inflow of water into Burbank sandstone in wells previously cored. Water injection profiles were not correlative with core permeability profiles in such wells. Apparently the vertical permeability substantially influences the flow between strata in a formation in a manner as to void the usual conclusions that have been drawn from consideration of the horizontal permeability measurements alone. The results obtained in comparing water injection profiles with horizontal permeability profiles suggest that many of the usual production operations based upon "selective" behavior or treatment of rock exposed in well bores need to be re-valuated and re-examined.
Petroleum reservoir rock are heterogeneous systems. Heterogeneity exists in respect to lithologic character insofar as such rock are composed of distinguishable solid phases. Heterogeneity also exists in respect to certain properties, such as porosity and permeability, that vary due to variation of the physical structure of the rock. Except in exceptional cases, both the horizontal permeability (measured parallel to the bedding planes) and the vertical permeability (measured perpendicularly to the bedding planes) exhibit significant variation in any common source of supply. The variation in horizontal permeability, as reflected by core analyses, has drawn the greatest attention of petroleum technologists probably out of the general notion that the mass movement of fluids in a reservoir is predominantly in the horizontal direction. Furthermore, in the usual case, the rock permeability measured in the horizontal direction is greater than that in the vertical.
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