In-situ formation compaction monitoring in deep reservoirs by use of fiber optics
- 1Kanto Natural Gas Development Co., Ltd., Mobara-shi, Chiba-ken, Japan
- 2Asahi Glass Co., Ltd., Oamishirasato-shi, Chiba-ken, Japan
- 3Godo Shigen Co., Ltd., Chosei-mura, Chiba-ken, Japan
- 4Asano Taiseikiso Engineering Co., Ltd., Uenohara-shi, Yamanashi-ken, Japan
Abstract. We have devised a new in situ monitoring method for the amount of stratified compaction in borehole drilled several hundred meters underground. This newly developed epoch-making monitoring system differs from conventional monitoring methods for land subsidence in that it is designed to continuously monitor the amounts of displacement in several intervals separately, using optical fibers fitted in the sensor assembly. This report presents results from a deep observation well. This is a continued report from the previous one on EISOLS 2010.