Reservoir anisotropy determination with multiple probe pressures
- Schlumberger Well Services, Anchorage, AK (United States)
Wireline formation testers are commonly used to produce a profile of pressure vs. depth through a reservoir by performing a series of point pressure tests during one descent in the well. A new test tool that can conduct a number of controlled pressure-interference tests between multiple probes produces a profile of permeability anisotropy vs. depth. Anisotropy, the vertical/horizontal permeability ratio, is required to predict production performance. The 70-cm vertical separation between probes provides this information on a more macroscopic scale than core plugs. This paper defines the practical operating domain for multiprobe tests and gives field examples to illustrate environments ranging from high to low permeability, with large and small anisotropy. Repeatability and interpretation sensitivity are demonstrated.
- OSTI ID:
- 5593791
- Journal Information:
- JPT, Journal of Petroleum Technology; (United States), Journal Name: JPT, Journal of Petroleum Technology; (United States) Vol. 45:12; ISSN 0149-2136; ISSN JPTJAM
- Country of Publication:
- United States
- Language:
- English
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