Well test analysis of commingled zones without crossflow
This paper presents a new testing technique for layered reservoirs without crossflow in order to estimate individual layer permeabilities and skin factors. The new testing technique consists of two sequential drawdown tests. During these tests the wellbore pressure and the sandface flow must be measured simultaneously. It is shown that the permeability and skin factor for each layer can be estimated uniquely using measured wellbore pressure and sandface flow rate from these two drawdown tests. It is also shown that these individual layer parameters cannot be estimated from the conventional drawdown or buildup tests wellbore pressure data. The nonlinear estimation theory is used in order to check the uniqueness of the estimated parameters. A general criterion is presented for quantitative analysis of the uniqueness problem.
- Research Organization:
- Schlumberger, Well Services
- OSTI ID:
- 6201060
- Report Number(s):
- CONF-8409104-
- Journal Information:
- Soc. Pet. Eng. AIME, Pap.; (United States), Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Vol. SPE13081; ISSN SEAPA
- Country of Publication:
- United States
- Language:
- English
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