Abstract

A better recovery with least cost constitutes a perpetual challenge, indeed, uncertainties related to the characterisation are generally reduced thanks to the new technologies, scenarios of development, methods of data treatment and global reservoir management..

The new technologies, such as seismic, secondary recovery techniques, non conventional wells contribution, as well as multidisciplinary approaches, and different aspects including field development, maintenance and the well survey, methods and algorithms in optimisation and artificial intelligence, performances of simulators, constitute key factors for reserves re-evaluation, mature field revitalisation, and better economically exploitation.

The focal point of this study is the non conventional drilling experience in Hassi-Messaoud oil field. These wells being a means of productivity enhancement, they allow also getting information of high resolution throughout the reservoir, and developing risked areas of the field known for their poor petrophysical properties, but presenting an economical profit as well.

Information obtained from horizontal wells, can help to get a more realistic reservoir image, for a new overview of field management. Without being too exhaustive, we can notice that reservoir characteristics obtained from the horizontal wells allow an estimation of permeability tensors in the three dimensions and a quantification of vertical and areal anisotropy (construction of directional variogram). Based on these anisotropy some geological models have been identified, especially the naturally fractured reservoir system. As result, a tri-dimensionnal characterisation model could be achieved. It has been pointed out that using a coherent geological model with usable uncertainties, the exploitation cost can be reduced.

Knowing that only the compilation of the information is not enough for itself, new approaches, such as optimisation methods are needed to integrate all the available information in a global characterisation process.

In this study, different results obtained will be presented, including phenomenological aspects related to different types of flow regimes as well as lateral and vertical heterogeneity quantification. This will emphasise on the impact of a better knowledge of the reservoir on the economy of the project and its global management.

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HOW CAN PRODUCTION DATA AND NEW TECHNOLOGIES HELP TO ENHANCE OIL RECOVERY IN MATURE RESERVOIR: CASE STUDY "HASSI MESSAOULD OIL FIELD ALGERIA"
Introduction

The current tendency in the oil field management aims toward the use of strategies on short, medium and long term, established by the multidisciplinary approaches integrating several sources of data. Generally, the oil companies fix th

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