Flow of Oil-gas Mixtures through Unconsolidated Sand
- L.S. Reid (Phillips Petroleum Co.) | R.L. Huntington (University of Oklahoma)
- Document ID
- Society of Petroleum Engineers
- Transactions of the AIME
- Publication Date
- December 1938
- Document Type
- Journal Paper
- 226 - 239
- 1938. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 5.6.8 Well performance, inflow performance
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The study of the flow of oil and gas mixtures through oil-bearing formationshas received special attention from the petroleum industry within the past fewyears, and has resulted in a series of research projects based upon variousphases of the flow of heterogeneous fluids through porous media.
Obviously, the low cost of producing oil during the flowing life of a wellmakes it desirable to obtain production by natural flow as long as possible andto effect a maximum recovery of oil and gas by the utilization of reservoirenergy through efficient methods based upon a thorough knowledge of reservoircharacteristics. Despite the extensive research that has been carried out,there is little information available on the behavior of oil and gas mixturesflowing through reservoir formations. This makes it impossible to predeterminethe optimum operating conditions for flowing wells.
A differential pressure must exist in the reservoir in order to induce flowtoward the well. It is a well established fact that with homogeneous fluids therelation of pressure drop to linear distance traveled is a straight linefunction as long as the flow is viscous. However, in regard to gas saturatedoils, a number of investigators have reported that the flow characteristics arematerially altered as some of the lighter hydrocarbons are liberated from theoil to form gas while the fluid passes through the reservoir.
Most of the work done has been concerned primarily with steady-state flow ofliquid-gas mixtures cloud has studied the effects of saturating crude petroleumoils with various gases, together with the resultant pressure gradients understeady flow conditions, noting that unsaturated oils flowed faster and yetmaintained lower pressure gradients than saturated oils.
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