Optimum Offshore Gas Asset Development Planning with Simultaneous Subsurface and Surface Modeling and Simulation

Romeo Solis Estrada1, Guillermo Bernal Ramirez1, Santiago Rojas Gonzalez1, Luigi Saputelli2, and Keshav Narayanan3. (1) Region Marina Suroeste, PEMEX Exploracion y Produccion, Edificio PEMEX 1, 1er nivel Ala Oriente calle # 33 Col. Burocratas C.P. 24180, Cd. del Carmen, Mexico, phone: +52-9339333-2579, rsolises@pep.pemex.com, (2) Landmark Graphics, 2101 CItiyWest Blvd, Bldg1, Ste 200, Office 4.916A, Houston, TX 77042, (3) Landmark Graphics, 1601 S. Mopac, Suite 300, Austin, TX 78746

We develop a case study planning process by using a multi-disciplinary and multi-scenario modeling strategy for balancing reservoir uncertainties (rock properties), optimum field development scenario (rate schedule and start time) and associated risks in the capital expenditures (price inflation and discount factor). The objective of this development is to recover dry gas reserves from five recently discovered fields in the most cost-efficient manner.

The methodology has proven to optimize capital investment, by selecting an optimum scenario, namely one that best balances risk and uncertainty, and maximize asset profitability. Faster decision making process is enabled by a series of key digital oilfield components, such as an integrated framework for multi-disciplinary (geology, reservoir and production engineering) and multi-scenario modeling and optimization, and the potential for continuous real-time adaptation of the development plan to prevailing reservoir and market conditions.