The development stage of any new field requires careful and full integration of all available data to ensure the robustness and flexibility of the development plans. One major source of information that adds a wealth of knowledge and reduces the number of uncertain variables in any field development is Pressure Transient Analysis (PTA). When used properly, this tool can provide accurate information about reservoir heterogeneities and well parameters such as permeability thickness, reservoir features, skin, and productivity indices.

This paper presents a comprehensive study where pressure transient analysis played a key role in detecting various reservoir features at the early phase of a field development. It further shares cases where pressure transient analysis confirmed good pressure communication across a layer that was thought of as a very tight layer. Also, the study participated in building a new realization of faults existence in the field. Many faults were removed from the field geological model based on insights from PTA and some other dynamic data. Some other case studies are included showing the full power of Pressure Transient Analysis which added significant value to reservoir properties definition. Furthermore, this paper will shed light on the use of pressure transient analysis for fluid characterization proposes.

The studied reservoir has a very complex nature in terms of rock and fluid properties. Both, the rock and fluid vary in the lateral and vertical direction making rock and fluid characterization a very challenging task to be completed.

Analysis of vintage and newly acquired well test data of this field played an important role in understanding the reservoir and helped fine-tune the development strategy. Integration of different data proved to be, yet again, a best practice to understand reservoirs and act accordingly

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