--> Abstract: The Humma Marrat Reservoir Development Project - Design of Experiments-Based Workflow Efficiency Meets the Reality of New Deli; #90063 (2007)

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The Humma Marrat Reservoir Development Project - Design of Experiments-Based Workflow Efficiency Meets the Reality of New Delineation Well Data Acquisition

 

Meddaugh, W. Scott1, Stewart Griest2, David Barge3 (1) Chevron Energy Technology Company, Houston, TX (2) Chevron Energy Technology Company, Houston (3) Saudi Arabian Texaco, Houston

 

The Jurassic-age Humma Marrat carbonate reservoir is located in the Partitioned Neutral Zone between Saudi Arabia and Kuwait. The reservoir was discovered in 1998. The estimated original oil in place is more than 500 million bbls. The gross reservoir interval is about 730 feet thick. The partially dolomitized lowermost interval contributes 80-90% of the production based on PLT data. The productive sections of the lower “E” zone averages near 20% porosity and 10-20 md permeability. The uppermost “A” zone averages less than 15% porosity and 2 md permeability in productive intervals.

 

A two-level design of experiments (DoE) based workflow was adopted in early 2004 to evaluate and optimize primary reservoir development. Reservoir uncertainties affecting volume and connectivity were assessed in the first-level of the workflow. The second-level focused on dynamic uncertainties. The results of the two level of the workflow defined the P10, P50, and P90 models used for development optimization. Economic analysis showed that primary development using vertical wells completed in the A and E zones on 640-acre spacing was the most attractive option. As the pressure data showed the main compartment of the reservoir to be approaching bubble point only a limited number of additional producers are likely needed.

 

Data acquired in 2005-2006 reduced reservoir uncertainties as well as OOIP and additional work was done to refine development options. Another series of dynamic models were generated that incorporated the new data and preserved the capability of giving probabilistic results. This modified DoE approach was used for final assessment of primary development options.

 

AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California