A Case Study: Field Development Plan for a Highly Overpressured Gas Reservoir in China by a Multidisciplinary Consulting Team

Operating companies generally produce their own field development plans (FDPs). Schlumberger Data and Consulting Services, a consulting group within an oilfield services company, was hired by PetroChina to perform a multidisciplinary integrated study on a highly overpressured gas reservoir, the Kela 2 field in the Tarim basin. The field has reserves exceeding 10 Tcf and will provide much of the gas for a major pipeline crossing China from the Tarim basin to Shanghai. The study consisted of building comprehensive geologic and reservoir models, estimating reserves, performing dynamic production and performance analyses on the reservoir, and providing an optimal FDP, which includes the drilling and completion designs, production engineering, reservoir monitoring and management, optimal implementation methods, and best practices. This paper describes a comprehensive FDP technical approach and workflow designed to ensure both seamless integration of the disciplines and high-quality work. The technical approach incorporates the construction of a database, geological reservoir and mechanical earth models, a reservoir dynamic model, a single-well model, a development design model, and an economics and risk model. The paper summarizes our experience in assembling a multidisciplinary team, promoting effective teamwork, and quality control (QC).