Subsidence as a result of petroleum production
Journal Article
·
· Earth Miner. Sci.; (United States)
OSTI ID:6717201
Subsidence in oil-producing areas is caused by the compaction of the producing layers of the underground reservoirs. Decline in the fluid pressure in the pores of the reservoir rock forces the formation to carry a larger portion of the overburden load. When the formation material fails to carry this load, compaction takes place and subsidence results at the surface. Compaction causes significant subsidence, especially when the formation material consists of clay and uncemented sand. Clay and sand layers compact almost to the same extent, the main difference being that the low permeability of the clay to water prevents instantaneous compaction and the time effect becomes an important factor. Additional factors that contribute to an appreciable delay in the subsidence noticed at the surface include creep, both in clay and sand, decrease in reservoir fluid pressure, and overburden which does not deform elastically.
- OSTI ID:
- 6717201
- Journal Information:
- Earth Miner. Sci.; (United States), Journal Name: Earth Miner. Sci.; (United States) Vol. 47:8; ISSN EMISA
- Country of Publication:
- United States
- Language:
- English
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