Recognizing and describing processes in producing and abandoned oil- and gas reservoirs that may cause environment footprints and identifying technologies to impair these
Year: 2016
Type: article
Abstract: This report gives a comprehensive description of CO 2 reservoir injection for EOR and sequestration purposes in depleted oil and gas reservoirs, under various in-situ conditions and with the intention of identifying effects that can cause environmental footprints as part of the process.The report also suggest means for detecting such footprints and possibly remedy them.Typically, reservoir pressure monitoring is used for examining storage process when CO 2 is injected into the subsurface.The pressure signal may be used to evaluate the pressure impact on both local and regional scale.This is important, since a high injection pressure and large-scale pressure increase can reduce the injectable amount of CO 2 in the long term.Rock and fluid properties as well as reservoir boundary conditions affect the height of the pressure increase within the reservoir and the final CO 2 distribution [1].Marston [2] presented a pressure profile for an actual operating EOR field from the data reported to a state oil and gas regulator as shown in Figure 1.Prior to the start of oil production, the original formation pressure was about 4850 psig, which is considerably below the formation fracture pressure of about 7800 psig.In an EOR formation, the original reservoir pressure is always below the fracture pressure because if otherwise, the oil would not have accumulated nor trapped [2].
Source: AGH Drilling Oil Gas
Author: Jann Ursin
Institution: University of Stavanger
Language: English
Subfield: Environmental Engineering
Field: Environmental Science
Domain: Physical Sciences
SDG: Climate action
Open Access status: diamond
OpenAlex ID: W2535708317