Since June 1980, the Egyptian Petoroleum Development Co., LTD. (EPEDECO) started oil production from sandstone reservoirs in Miocene Rudeis formation at H and K Oil Fields in West Bakr area, Eastern Desert, EGYPT. The cumulative production volume at the end of 1987 was 11.5 millon barrels.
Following the production, water cut incerease started from wells located at the flank of K structure, due to strong water drive. Chemical analysis data of waters in the K Oil Field shows a tendency to preserve high salinity around the crest of structure and decrease salinity toward the flank of structure. Vertical salinity change in a thick sandstone reservoir was confirmed by continuous water analysis, correlation of SP curves and the salinity change before and after set bridge-plug at K-5 and K-8 wells. That is to say, the high salinity water above oil water contact (OWC) is connate water, while low one below OWC is aquifer water effected by meteoric water.
In H Oil Field, the reservoir shows variety of thikness, ranging from 45m at H-3 to Om at H-4. For the purpose of clarifing sand-body distribution and the initial recoverable oil inplace, sedimentary facies of the reservoir were studied based on core observations, lithology classification by EC Logs and dip-meter data from wells in this field. As a result of study, the sandstone reservoir is possiblly of a deep-sea fan deposite with E-W axis.
