| Summary: | Methane hydrate stores and releases methane depending on thermodynamic conditions, and therefore methane hydrate is relevant to environment, climate, and paleoclimate issues. Furthermore, the methane in hydrate could be a future energy resource. It is important to know the amount of methane hydrate present to assess its production capability and its impacts on the environment, but it has been a challenge to do so. The National Gas Hydrate Program Expedition 01 (NGHP-01) identified methane hydrate in the intervals 55–94 mbsf (Hole 5A) and 53–90 mbsf (Hole 5B) in near-vertical fractures. When methane hydrate is in near-vertical fractures there is no established method for determining the amount of methane hydrate. The program UTAPWeLS was used to perform simulations using fractures as dipping beds to model a well log response in methane hydrate-filled fractures. Through modeling resistivity well logs with different fracture width, fracture dip angle, and formation resistivity, simulations provide images to compare to the measured resistivity. The modeled simulations were compared to the measured well log responses. The simulated logs replicate the response of the measured logs for Hole 5A and Hole 5B, with only some minor inconsistencies. The model suggests that Hole 5A has 6.86% total bulk volume in the hydrate bearing interval and Hole 5B has 5.64% total bulk volume in the hydrate bearing interval. US Department of Energy DE-FE0009949 A five-year embargo was granted for this item. Academic Major: Earth Sciences
|
|---|