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- W2620661569 abstract "Abstract Well testing in offshore environments is critical, challenging and often costly in terms of operations and logistics. The means of periodic testing for monitoring well performance offshore is typically through the use of a test barge. Tide cycles, which often pose mobility problems for the test barge, typically affect testing efficiency. Reducing the duration of normal production test improves field operations because of the increase of the possible number of wells that can be tested. This paper illustrates the benefits of using instantaneous shut-in wellhead pressure (ISWHP) for generating a pressure rate (PQ) curve in an offshore field in Saudi Arabia. Test barge optimization is shown through the construction of PQ curve for a well with single test data. In theory at least two points are required to construct the PQ curve. Since a single test data is typically obtained because of rate test scheduling optimization, the ISWHP technique for constructing the PQ curve would be an appropriate approach to optimize testing requirements each month and to obtain the base potential of each well. With the ISWHP measurement technique/methodology, a unique rate test will be enough to construct the PQ curve instead of two or more rate test data. This methodology is based on the principle of pressure transient analysis to distinguish the type of flow regime. The use of the pressure derivative plot (log pressure vs. log time) from gauge data and history plot of time verses pressure from Supervisory Control and Data Acquisition (SCADA) helps to determine the start of ISWHP. Field and hypothetical examples are provided to explain the methodology. Instead of an average two days of typical test barge activity for well testing, the ISWHP technique allows the termination of a test within 10 minutes after recording a rate test, with a significant improvement in testing efficiency. The number of well tests per month has almost doubled from applying the method in the field. A field wide application of the ISWHP decreases the need to conduct several tests per well, resulting in accurate or rapid diagnosis for well-timed decisions to enhance the field's production offshore." @default.
- W2620661569 created "2017-06-09" @default.
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- W2620661569 date "2017-04-24" @default.
- W2620661569 modified "2023-09-23" @default.
- W2620661569 title "Instantaneous Shut-in Wellhead Pressure for SSA Field Oil Wells" @default.
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- W2620661569 doi "https://doi.org/10.2118/188062-ms" @default.
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