Investigating the CO 2 Geological Sequestration Potential of Extralow-Permeability Reservoirs: Insights from the Es1 Member of the Shahejie Formation in the Dawa Oilfield

Chao Li, Ende Wang (), Dawei Wang and Ting Zhang
Additional contact information
Chao Li: School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
Ende Wang: School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
Dawei Wang: New Energy Division, Liaohe Oilfield Company, CNPC, Panjin 124010, China
Ting Zhang: AGEO Engineering Service Pty Ltd., East Perth, WA 6004, Australia

Energies, 2024, vol. 17, issue 9, 1-17

Abstract: Extralow-permeability reservoirs have emerged as a significant area of focus for CO 2 geological sequestration due to their stable subterranean structure and expansive storage capacity, offering substantial potential in addressing global climate change. However, the full extent of CO 2 geological sequestration potential within these extralow-permeability reservoirs remains largely unexplored. To address this gap, this paper utilizes the Shahejie Formation (Es1 member) of the Shuang 229 block in the Liaohe oilfield, Bohai Bay Basin, as a case study. This section is characterized by its abundant oil-gas reserves and serves as an exemplar for conducting experimental research on CO 2 storage within extralow-permeability reservoirs. The results demonstrate that the reservoir lithology of the Es1 member is fine sandstone and siltstone, with high compositional and structural maturity. Moreover, the average porosity is 14.8%, the average permeability is 1.48 mD, and the coefficient of variation of the reservoir is approximately 0.5, which indicates a low- to extralow-permeability homogeneous reservoir. In addition, the overburden pressure is >2.0 MPa, the fault can withstand a maximum gas column height of >200 m, and the reservoir exhibits favorable overburden and fault sealing characteristics. Notably, stepwise increasing gas injection in the Shuang 229-36-62 well reveals that the injected liquid CO 2 near the wellhead exhibits a relatively high density, close to 1.0 g/cm 3 , which gradually decreases to approximately 0.78 g/cm 3 near a depth of 2000 m underground. The injected fluid changes into a supercritical state upon entering the formation, and the CO 2 injection speed is optimal, at 0.08 HCPV/a. According to these findings, it is predicted that the highest burial CO 2 volume via the injection of 1.5 HCPVs in the Wa 128 block area is 1.11 × 10 5 t/year, and the cumulative burial volume reaches approximately 2.16 × 10 6 t. This shows that the CO 2 sequestration potential of extralow-permeability reservoirs is considerable, providing confidence for similar instances worldwide.

Keywords: CO 2 sequestration; extra-low-permeability reservoirs; controlling factors; Es1 member of the Shahejie Formation; Dawa oilfield (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/9/2221/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/9/2221/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:9:p:2221-:d:1388730

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().