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2 2015

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Increasing the degree of certainty on depleted gas reservoir perforation, using geophysical saturation methods

Şuţoiu F., Foidaş I., Avramescu M.

AGH Drilling, Oil, Gas

2015

Vol. 32, no. 2

359--368

New geophysical investigations, capable of highlight the most thin gas saturated layers, offers for depleted gas reservoirs a new chance. Lately Romgaz, used most types of anterior mentioned investigations, in purpose of analyzing the petrophysical properties of thin sands. Thereby, there had been identified within depleted gas reservoirs, many layers saturated with gas, which after perforation had been confirmed. After, these were included in the effective thickness zone, constitute the foundation for gas resources and reserves reevaluation. In this paper there will be presented some concrete examples regarding the usage of these high resolution logs, for a better definition of reservoir properties.

Implementation of project management concept, in depleted gas reservoir exploitation

Tataru A., Stefanescu D. P., Balazs S.

AGH Drilling, Oil, Gas

2015

Vol. 32, no. 1

175--183

In the past the gas industry focused its interest and major investments mainly on the early life of the reservoir and on the development and constant maintenance of production. But times change and currently for depleted gas reservoirs defined as reservoirs in an advanced stage of decline, energy and production should be considered as potential additional energy sources. The ideal time to start managing a reservoir is at its discovery, but Romgaz has a new approach regarding project management implemenatation for depleted gas fields. The strategy presumed, a multidisciplinary team of geophysicists, geologists, reservoir engineers, production engineers and economists. These multidisciplinary teams evaluated existing information and build up a plan for new data acquisitions, the data was integrated, processed, interpreted and correlated in a study with following objectives: -Construct 3D geological model to estimate resources. -Use reservoir engineering to estimate remaining reserves and expected ultimate recovery. -Use results of the study to identify new development opportunities on the field and forecast production scenarios. Success for this challenge depended on: -working as a team; -openness, flexibility, communication, and coordination; -persistence.