Fluid properties play an integral part in the entire E&P life cycle from exploration to mature asset management to EOR/IOR. As projects mature, the need for such data integration and its interpretation, in the light of reservoir performance, varies. In some cases, additional fluid information obtained during the surveillance/development phase can carry symptomatic information related to initial reservoir conditions (reservoir initialisation) and as well as confirmation of initial assumptions about the reservoir connectivity. The amount of data required and the quality vary during the full life cycle of a reservoir. The characterisation of reservoir fluids is normally achieved via experiments (PVT data and compositions) in combination with modern EOS tools and correlations. Pressure, Volume and Temperature (PVT) and fluid characterisation have been traditionally placed within reservoir engineering technologies due to the significant impact on in-situ volumes, recoverable reserves, initial rates and development strategies. However, the use of the data/outcome is quite interdisciplinary. While the PVT data and the utilisation are quite general, there is always some regional bias in the applications and the data required for those applications. As we are holding this workshop in the Middle East, we will be focusing on more regional problems and the use of PVT and other relevant complementary information such as geochemical data. Some of the regional focus will be on acid gases (H2S/CO2) and their impact on reservoir initialisation, performance, and peripheral issues, including their disposal. In addition, EOR/IOR aspects and how they are distributed in large-scale reservoir systems, and their generation, will be discussed. Carbonate systems, where most of these fluids reside, along with tight systems, will be covered in terms of regional basis, and learnings from other parts of the world are expected to be shared among the participants. Integration in such complex systems, when compared to two decades ago, finds significant progress in terms of enabling technologies, like modern wireline tools, in-situ analysis tools, etc. As such technologies become more affordable, their impact is being felt in a wide spectrum of projects. As we are drilling deeper and exploring depositional environments/rocks that were not explored at commercial scales before, we are discovering increasingly complex fluids at extreme conditions of reservoir pressure and temperature. In recent years, there has been an added dimension to the complexities encountered in reservoir fluids where the fluid phase behaviour is affected by pore proximity (i.e. shales and nano-darcy systems). Of late, such complexities have been discussed heavily in literature. Not only reservoir conditions, but also a wide spectrum of fluids has been discovered to increase the compositional complexity in such environments. There is also a lot of speculation in recent literature in terms of some of the partially unexpected results in some of the cases (i.e. deemed non representative saturation points, lower CGR’s etc.). In addition, some of the analysis techniques suggested in the literature are considered to be non-predictive, at least from the point of not having good experimental data to prove them. Produced/discovered fluids span the range of lean/dry gases (acid gases/sweet gases, etc.) to extra heavy oils and bitumen. As the fluids and the reservoir conditions become more challenging, progress in the computational area is also being made, such as new EOS models (including pore proximity effects) and computational techniques, advanced characterisation methods, etc. Beyond the highlighted complexities above, fluid data is shared with many disciplines beyond petroleum engineering, including geochemistry, geo-operations, flow assurance and process, leading to fit-for-purpose analysis and integration techniques. This workshop will focus on the new developments in all elements of the development cycle, including exploration, reservoir and production management, EOR/IOR and even CO2 sequestration. It will bring together leading industry experts from multiple disciplines to share their experience on various aspects of reservoir fluids.