CO2 Sequestration in a Depleted Gas Field: A Material Balance Study

Abstract

The material balance techniques have been used in the oil and gas industry for estimating hydrocarbon reserves for a long time. The objective of this paper is to introduce a fairly simple and fast material balance technique that can provide a fairly good estimate of CO 2 storage capacity in depleted gas reservoirs.Sequestration of CO 2 in geological formations is a strategy currently being considered for decreasing CO 2 emissions to the atmosphere. These geological formations can be either depleted oil and gas reservoirs or saline reservoirs. A depleted gas reservoir can store significantly more gas than a depleted oil reservoir due to the fact that gas is more compressible than oil and the ultimate recovery in gas reservoirs is higher than that in oil reservoirs. Many researchers have published reservoir simulation studies of CO 2 sequestration in depleted gas fields, however, a reservoir simulation study, depending on its complexity, can take several months to perform. In this paper, a fairly simple and fast material balance technique, combined with nodal analysis, is presented that can provide a fairly good estimate of CO 2 storage capacity in depleted gas reservoirs.A depleted gas reservoir, for which the production and pressure history data were available, was selected as a candidate to perform this material balance study. First the material balance calculations were performed to estimate the size of the gas reservoir, aquifer and reservoir pressure. The formation parting pressure was estimated based on basic rock mechanics principles as a function of reservoir pressure. The bottom hole injection pressure was maintained below the formation parting pressure, until the surface facilities limitations were reached. As a result of this study, the amount of CO 2 that can be stored in this depleted gas reservoir was estimated within a few weeks.

Review on Carbon Capture, Utilization, and Storage for Enhancing Gas Recovery

“…The enhancement is mainly a result of the higher final recovery and enhanced gas compressibility, leading to a much bigger storage capacity per unit of pore volume. Observation aligns with the findings of ref and . A comparative analysis of different reservoir types employed in this storage method reveals that condensate-gas reservoirs offer distinct advantages when contrasted with wet and dry-gas reservoirs.…”

Effect of coal petrology and pressure on wetting properties of wet coal for CO2 and flue gas storage

“…Carbon capture and storage (CCS) has the potential for removing CO 2 from the atmosphere when biomass is burned (IPCC, 2005). This option includes storage strategies such as CO 2 injection into deep saline aquifers (Ofori and Engler, 2011;André et al, 2010;Arts et al, 2008;Chadwick et al, 2007;Zweigel et al, 2004;Baklid et al, 1996), depleted oil and gas reservoirs (Arts et al, in press;Seeberger and Hugonet, 2011;Meer et al, 2010;Stein et al, 2010;Velasquez et al, 2006), and unmineable coal seams (Shojai Kaveh et al, 2011;Bergen et al, 2009;Mazzotti et al, 2009;Bergen et al, 2006;Siemons et al, 2006).…”

Advances in Carbon Dioxide Storage Projects: Assessment and Perspectives

“…111 CO 2 storage in the depleted gas reservoir is better than storage in a depleted oil reservoir due to high storage capacity, recovery, and gas compressibility. 112,113 However, in this part, the discussion of storage of CO 2 in depleted reservoirs is discussed in detail, considering their existing projects below.…”