![]() However there exists several "complex scenarios" where conventional PTA interpretation becomes non feasible. The utility of PTA for well test interpretation is well known among reservoir engineers and it has a rich literature base. ![]() However recently, considerable amount of work has been done to study the applicability of RTA on high frequency well test data. RTA is known to give convincing estimates of reservoir parameters when low frequency (weekly or monthly) production data is available. However RTA deals with transient state flow and the RTA flow equations have analytical origin. Traditional DCA deals with pseudo steady state flow regime and is an empirical / semi empirical method. RTA can also be termed as a modern Decline Curve Analysis (DCA) method. ![]() ![]() PTA is mainly used for analysis of short-term conventional well test while RTA is used mainly for analysis of pressure and rate data over a long time span. Pressure Transient Analysis (PTA) and Rate Transient Analysis (RTA) has been the industry practice for analysis of pressure data. One such modern data interpretation method is the "Rate Transient Analysis (RTA)". Continuous improvement in data acquisition techniques as well as data interpretation methods has been seen in the recent past. The cost intensive oil and gas industry dictates the use of techniques which maximize quality information while minimising rig time.
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