Previous Talks

Wednesday September 9, 2015

Illinois Basin - Decatur Project: Microseismic Event Prediction

Donald W. Lee, Schlumberger

Abstract

The Illinois Basin - Decatur Project (IBDP) is a carbon dioxide (CO2) storage project that has a goal to inject 1 million tonnes of CO2 over a three-year period. As a part of managing the CO2 storage, several measurement, monitoring, characterization, data integration, and modelling technologies originally developed for hydrocarbon exploration and production applications were adapted for use on this project. Real-time continuous measurement of microseismicity in the project area showed that these events consistently cluster instead of being randomly located, suggesting the pre-existence of rock imperfections in the injection site. Geomechanics and finite element models that duplicate the location of observed small amplitude microseismic clusters with injection show a high correlation with measured events locations. This work advances the direct use of surface seismic data to constrain mechanical model assumptions pertaining to features associated with injection-induced microseismicity.

Wednesday April 11, 2012

Quantifying the Drilling risk of Exploration and Development wells in the Sub Salt Arena: The use of 3D Mechanical Earth Models and Finite Element Modeling to risk well locations and trajectories

Donald W. Lee, Schlumberger

Abstract

As companies continue to explore and drill prospects in the deep water sub salt Gulf of Mexico Wilcox Lower Tertiary trend, many are in the early stages of planning for field development. Cost of single exploratory wells can easily surpass $100 million dollars in these challenging drilling environments. Salt inclusions, rapid pore pressure changes, and bitumen zones are all examples of geologic considerations that can result in lost boreholes, unplanned sidetracks and expensive AFE overruns. The field development team and especially the lead drillers must always keep safety first and effectively manage costs and satisfy demands to efficiently drain the reservoir with minimum number of well and production platforms. This presentation examines a deep water discovery that is in the planning stages for field development. The development team was interested in quantifying risk for input to very expensive decisions including platform location, trajectory risk ranking, stability of wellbores through faults after production, and other geomechanical hot spots.


Speaker Biography

Donald W. Lee is a geomechanics advisor for Schlumberger in North America. Don graduated with a B.S. in Electrical Engineering and joined Schlumberger in 1980 as a Field Engineer. He has worked in numerous interpretation and management positions and currently manages projects and constructs 3D finite element models to provide clients with answers for reservoir scope geomechanical problems such as reservoir compaction, completion failure, fault stability, well placement, caprock integrity, and injection limits. Areas of past work include deep water sub salt reservoirs, unconventional shale, and CO2 sequestration models. Don has won several internal awards for solving geomechanical problems in a team environment and has received five patents.