The National Methane Hydrates R&D Program
The DOE/JIP Gulf of Mexico Hydrate Research Cruise
During this expedition we will maintain a log of information relayed from the chief Scientist on the expedition. Whenever possible, images will be displayed along with the text.
May 19 - Day 33 - Status Report
May 19 - Keathley Canyon 151 - Logging completed
Location: Keathley Canyon 151#3
Science Update - May 19:
Wireline logging and Vertical Seismic Profile (VSP) programs were carried out over the 120-342 mbsf interval in the KC151#3 hole today. VSP programs provide a high-resolution seismic image of the immediate vicinity of the borehole. Logs showed high velocity intervals that correlate with the high resistivity intervals in the KC151#2 Logging While Drilling (LWD) hole. The VSP shot 108 stations over about the same depth interval. The hole was abandoned with a cement plug and the drill string and sea bed frame are being picked up during the night. Another Hyacinth Rotary Corer (HRC) pressure core (13C) was degassed, yielding about 7.3 L of gas. The shipboard gas chromatograph was down, and the gas composition will be determined later in a shore-based lab. The core was 60 cm in length in a 1-m core barrel, with the balance filled with water. The core will be opened and further analyzed to determine porosity and other physical properties. If the gas was 75% methane (with the balance air) and the porosity of the core 50%, then the amount of methane in excess of that which could be dissolved in the water requires that an average of about 3% of the pore space in the recovered pressure core was occupied by methane hydrate.
Pack up lab equipment and samples, prepare for shipping to various locations at the conclusion of the cruise on Sunday.
Planning and Data Sheet for KC151 - #3 [PDF-10KB]
Special Report - Pressurized Coring and Analyses Equipment
Special Report - core handling
Special Report - Conventional Wireline Logging Operations in the Gulf of Mexico Gas Hydrate JIP Drilling Program - Timothy Collett, USGS
Maps of drill sites - Shows Keathley Canyon and Atwater Valley locations
Coring Photo Gallery - Photos showing pressure coring and analyses equipment
Day 16 Photo Gallery - Photos by NETL scientist showing core analyses process and equipment
Day 13 Photo Gallery - Photos by NETL scientist showing drilling preparation
Day 12 Photo Gallery - Photos by NETL scientist showing core retrieval and processing
Day 10 Photo Gallery - Pressurized core prior to transfer to lab and seabed frame preparation
Day 6 Photo Gallery - Working with push cores and ROV photos of sample collection at AT 14
Day 4 Photo Gallery - Remotely Operated Vehicle (ROV), Sampling, Core Handling
Day 3 Photo Gallery - Preparation for Drilling
Day 2 Photo Gallery Loading the Uncle John [PowerPoint]
The drill ship out to sea - Setting up the lab [PowerPoint]