In-situ retorting of oil shale

Wells – Processes – In situ combustion

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

166261, 166245, E21B 43247

Patent

active

044833989

ABSTRACT:
Fluid, such as liquid water, is injected into the rock surrounding an in situ oil shale retort at sufficient pressure and flow rate so that the injected fluid flows toward the retort to block the path of hot liquid and gaseous kerogen decomposition products escaping from the retort and to return heat to the retort. The successful conduct of an oil shale retorting operation usually requires that the retort temperature be maintained at a temperature sufficient to decompose efficiently the kerogen contained in the oil shale. By reducing the heat loss from an active retort, the amount of energy required to maintain a desired temperature therein is reduced. The fluid injection method also maintains pressure in an in-situ oil shale retort, allowing in-situ oil shale retorting to be efficiently conducted at a desired pressure. The method also reduces the danger to mineworkers who may be engaged in adjacent mining operations due to the escape of hazardous gases from an active retort. The method allows a series of sequential in-situ oil shale retorts in an oil shale formation to be placed more closely together than previously practical by reducing hot fluid leakage from each active retort to one or more abandoned retorts adjacent thereto, thus improving the recovery factor from the formation. The method also minimizes contamination of the formation surrounding an active in-situ retort due to hazardous chemicals which may be contained in the kerogen decomposition products leaking from the retort.

REFERENCES:
patent: 2718263 (1955-09-01), Heilman
patent: 4005752 (1977-02-01), Cha
patent: 4026360 (1977-05-01), Drinkard
patent: 4093310 (1978-06-01), Terry
patent: 4109718 (1978-08-01), Burton
patent: 4120355 (1978-10-01), Knepper
patent: 4219237 (1980-08-01), Sigemore
patent: 4399866 (1983-08-01), Dearth

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

In-situ retorting of oil shale does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with In-situ retorting of oil shale, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In-situ retorting of oil shale will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2185339

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.