CHARACTERIZATION OF GAS RESERVOIRS USING PRODUCTION DATA ANALYSIS PRE-TERTIARY BASEMENT GAS RESERVOIR, SOUTH SUMATRA, INDONESIA

摘要

This paper presents a field case history of the integrated analysis and interpretation developed using continuously measured rate from production ticket and surface pressure and static reservoir pressure data from pre-tertiary basement gas reservoir in South Sumatra, Indonesia. The primary objective of this work is to estimate areal distributions of flow properties (effective permeability and skin factor) as well as "volumetric" properties (original gas in place, gas reserves and reservoir drainage area - per well basis). The outcomes are then used to evaluate the effectiveness of well spacing and to identify additional potential area for infill well.rnThroughout this study, a type curve approach is used to analyze production data, which enable us to perform real-time evaluation and monitoring of the well performance. This approach is cross-validated with conventional material balance analysis. Combination of the two analyses should provide more consistent results for characterizing the pre-tertiary basement gas reservoir. In addition, the evaluation of production data can identify the occurrence of possible well interference.