Integrated Crosswell Seismic-Advanced Technology to Improve Reservoir Description in Belayim Field (Egypt)

By

 M. Antonelli¹, R. Awad², A. Khadr², F. Miranda¹

(1) ENI-Agip Division, S. Donato Milanese (Milan), Italy (2) Petrobel (Belayim Petroleum Co.), Nasr City, Cairo, Egypt

 This paper describes the results achieved applying the Integrated Crosswell Seismic (ICS) technology in Belayim Field (Egypt). ICS is an innovative methodology to improve the de-scription of the internal geometries of the reservoir between two or more wells.

In December 2001, TomoSeis Corporation acquired Crosswell Seismic Data in the Belayim Land field as part of a reservoir characterization project being conducted by AGIP and Belayim Petroleum Company (Petrobel).

Seven wells were prepared by Petrobel, resulting in the acquisition of five complete cross well profiles. The well spacing between these wells varies from 200m and 835m.

The cross well profiles were designed to be able to:

1. Define the structure of the horst in the Belayim formation

2. Provide a high resolution image of the zones IIA through IV

3. The ultimate goal is to help deter-mine why production varies be-tween the different wells by im-aging the proposed fault east-west fault zone and the production zones in detail

The interpretation of the final seismic profiles allowed to recognize sub seismic faults not visible on a conventional surface 3D seis-mic survey, and lateral velocity variation attributed to the facies variations.

The new structural features were used to update and verify the current geological model.

A new dynamic model based on the updated geological one, will be built allowing us to define and plan with more confidence and accuracy a new injection pattern and location of new producers.