Logging-while-coring as a method for recording data while downhole coring

This technology is a method and apparatus that enables downhole coring while simultaneously receiving logging-while-drilling (LWD) tool data.

Unmet Need: Method to rapidly log information during the coring process in oil and gas exploration

Current methods to collect data regarding underground formations involve the collection of geophysical and geological data as a well is being drilled, referred to as LWD measurements. In order to obtain LWD data, two holes need to be drilled, making this method extremely time consuming. An additional disadvantage is the possible detrimental effect on the data correlation, as correlating a core sample with formation property data assumes that the data and sample are obtained from same location or even the same hole. Previously, it has not been possible to continuously collect large diameter core and in situ logging data simultaneously.

The Technology: Simultaneously and efficiently logging information during coring

This technology describes a device that combines the coring and logging processes, enabling efficient characterization of sedimentation. It consists of both a core collar equipped with logging-while-drilling tools, and a retrievable core barrel, which receives core from a borehole to be sent to the surface for analysis. This combination allows for simultaneous logging and coring, and has the potential to save time and energy during the oil and gas exploration process.

This technology has been validated using an ocean drilling test.

Applications:

• Combining logging and drilling components allows for simultaneous deployment at a single drilling site
• Environmentally friendly energy or fuel production from coal or other biomass
• Obtaining logging-while-drilling data and a closely correlated core sample from a single borehole

Advantages:

• Simultaneous core-log depth correlation and core orientation
• Reduces time required to log after drilling
• Coring can be completed in the bore hole itself
• Makes in situ measurements over the same cored interval in a particular hole
• Reduces rig time as compared to separate coring and logging operations

Lead Inventor:

David Goldberg, Ph.D.

Patent Information:

Patent Status

Related Publications:

• Goldberg, D., G. Myers, G. Iturrino, K. Grigar, T. Pettigrew, S. Mrozewski. “Logging-while-coring – new technology for the simultaneous recovery of downhole cores and geophysical measurements” 2006 Jan. Geol. Soc. 2006 Jan; 267: 219-228.

Tech Ventures Reference:

• IR M04-010

• Licensing Contact: Richard Nguyen