Behavior of Contents of High-pressure Reservoirs
- Eugene A. Stephenson (University of Kansas)
- Document ID
- Society of Petroleum Engineers
- Transactions of the AIME
- Publication Date
- December 1938
- Document Type
- Journal Paper
- 189 - 198
- 1938. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.6 Natural Gas, 5.6.4 Drillstem/Well Testing, 5.1.2 Faults and Fracture Characterisation, 1.10 Drilling Equipment, 4.1.2 Separation and Treating, 4.1.5 Processing Equipment, 5.2.1 Phase Behavior and PVT Measurements, 1.6 Drilling Operations, 2.4.3 Sand/Solids Control, 5.8.2 Shale Gas
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In most instances the fluids produced from underground reservoirs have beendescribed as they appear at the surface, and usually it has not been necessaryto distinguish between surface and reservoir phases. More recently it hasbecome imperative to recognize the fact that changes in phase may occur betweenthe reservoir and the receiving unit.
The simple terminology of "wet" and" dry" gases and" crudepetroleum oil "served our needs fairly well in the shallow, low-temperatureand low-pressure fields. It has been left to the legislatures, regulatorycommissions, and courts to decide whether a field is or was a gas field, an oilfield, or both. This they have done by direct definition and also byimplication. For example, in Texas:
The term "gas well" is any well which produces natural gas notassociated or blended with crude petroleum oil at the time of production, orwhich produces more than one hundred thousand (100,000) cubic feet of naturalgas to each barrel of crude petroleum oil from the same producing horizon, orwhich produces natural gas from a formation or producing horizon productive ofgas only encountered in a well bore through which crude petroleum oil is alsoproduced through the inside of another string of casing.
The term "oil well" is any well which produces one (1) barrel or moreof crude petroleum oil to each one hundred thousand (100,000) cubic feet ofnatural gas.
In the state of Louisiana, the same general result is achieved largely by thefollowing paragraph:
Wells producing both oil and gas shall not waste or blow into the air an amountof gas of more value at three cents per thousand cubic feet, than the marketvalue of the oil recovered. The Commissioner of Conservation shall allow areasonable time to determine the status of any well.
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