Analysis of data from a restricted-entry well
This work discusses procedures for analyzing well test pressure data from a restricted-entry well. The authors present derivative type curves for the case where wellbore storage effects are negligible and show how they can be used in conjunction with dimensionless pressure type curves to analyze pressure data from a restricted-entry well. These type curves can be used to analyze both pressure data for constant rate production and rate data for production at a constant wellbore pressure. This work also presents a procedure for analyzing wellbore storage and skin dominated data obtained at a restricted-entry well. This method of analysis requires type curve match of both early-time pressure and pressure derivative data and semilog analysis of pseudoradial flow pressure data and, in many cases, can be used to obtain estimates of horizontal and vertical permeability, the mechanical skin factor and the pseudoskin factor. Gas reservoir limit tests for both complete-penetration and restricted-entry cases are also considered. A new method to generate pseudotime based on average pressure directly from boundary-dominated flow pressure or rate data is presented. By using this pseudotime, data obtained during a reservoir limit testing can be analyzed. Specifically, the new analysis method allows one to estimate average pressure and reservoir pore volume directly from boundary-dominated flow data. Methods are presented for both constant rate production and constant pressure production. It is shown that this approach can be applied to both a completely-penetrating well and a partially-penetrating well.
- Research Organization:
- Tulsa Univ., OK (USA)
- OSTI ID:
- 5817463
- Country of Publication:
- United States
- Language:
- English
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