The Technique of Minimum Rate of Flow Tests and the Study of Production Performance
- Geneos Pete Cokinos (Railroad Commission of Texas)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- January 1960
- Document Type
- Journal Paper
- 23 - 27
- 1960. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 2.2.2 Perforating, 4.1.5 Processing Equipment, 1.6 Drilling Operations, 5.5.2 Core Analysis, 4.1.2 Separation and Treating, 5.6.4 Drillstem/Well Testing, 4.1.9 Tanks and storage systems, 2.4.3 Sand/Solids Control, 5.6.2 Core Analysis, 5.2.1 Phase Behavior and PVT Measurements
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An exhaustive examination of literature has revealed a lack of any subject material on the technique of minimum rate of flow tests. The minimum rate of flow of a well is that rate of flow of oil or gas production preceding the rate at which the well begins to give definite signs of the flowing pressure establishing a downward trend to zero.
A minimum rate of flow test becomes necessary when a company operating a well seeks evidence that waste will occur to the producing reservoir if the subject well is not given allowable relief. Data frown such a test are presented to the Texas Railroad Commission Oil and Gas Div. for study and engineering recommendations.
In conducting this type test, the well in question undergoes a series of 24-hour tests which subject it to a decreasing rate of flow, through choke changes, until the minimum rate is established.
Twenty-four hour test data, in the form of recorded wellhead flowing pressures, oil production, salt water production, gas production and any other pertinent well information gathered from completion data relative to the producing characteristics of the well, is required. Results and test data are reported in tabular and graphic form with recorded pressure charts. Method of completion, electric log and core analysis, method of operation and other information relative to the producing life of the well is obtained.
Prudency of operation, as demonstrated by manipulation of chokes, will give further evidence. Examples of different minimum rates of flow tests conducted by the author, with results, will be outlined along with concluding information based on results and experiences of well testing.
Since the late 1930's, the Texas Railroad Commission has been staunch in insisting that engineering data be presented as evidence in support of any request before Commission hearings. The acceptance of engineering improvements in drilling and production coincides with the Commission's desire to have engineering data from actual field tests presented as exhibits.
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