Optimal selection of favorable areas for CO2 geological storage in the Majiagou Formation in the Ordos Basin

CO2 geological storage (CGS) technology is currently one of the best choices for large-scale low-cost CO2 emission reduction in the world, and the primary issue of CO2 geological storage is the optimization of the selection of favorable areas for CO2 storage. In view of the insufficient research on the optimization of favorable areas for CO2 geological storage in the Majiagou Formation in the Ordos Basin, this study aims to determine the boundaries of the CO2 geological storage area in the Ordos Basin by studying the temperature and pressure conditions, reservoir conditions, structural conditions, caprock conditions , and the salinity conditions of the formation water using a large amount of geological, drilling, geophysical and experimental laboratory data. After the regional boundary of the CO2 geological sequestration is determined, it can be optimized and CO2 geological sequestration can be conducted in the areas that have favorable reservoir conditions, are relatively close to CO2 emission sources, have a high degree of exploration, have an appropriate formation depth and have a small impact on the development of other mineral resources. The results show that (1) the areas suitable for the geological storage of CO2 in the Ordos Basin are located in the distribution area of the Majiagou Formation in the Tianhuan Depression, except for the missing areas in the central paleo-uplift. The ares to the east of the Baiyanjing-Shajingzi fault, to the north of the northern margin of the Weibei uplift, to the west of the Yellow River fault, and to the south of the Yimeng uplift are suitable for CO2 geological storage. (2) Based on the three aspects of technology, safety, and economic feasibility, it was determined that the Wushenqi-Jingbian-Yan'an karst slope area (I1) is the best CO2 geological storage area, and the Yulin-Mizhi karst basin area (I2) is a favorable area for the geological storage of CO2 in the Ordos Basin.&#160;

Download Full-text

Study on the Influential Factors of CO2 Storage in Low Permeability Reservoir

Energies ◽

10.3390/en15010344 ◽

2022 ◽

Vol 15 (1) ◽

pp. 344

Author(s):

Ping Yue ◽

Rujie Zhang ◽

James J. Sheng ◽

Gaoming Yu ◽

Feng Liu

Keyword(s):

Carbon Dioxide ◽

Co2 Storage ◽

Ordos Basin ◽

Influential Factors ◽

Low Permeability ◽

Geological Storage ◽

Co2 Geological Storage ◽

Low Permeability Reservoir ◽

Low Permeability Reservoirs ◽

Breakthrough Pressure

As the demands of tight-oil Enhanced Oil Recovery (EOR) and the controlling of anthropogenic carbon emission have become global challenges, Carbon Capture Utilization and Sequestration (CCUS) has been recognized as an effective solution to resolve both needs. However, the influential factors of carbon dioxide (CO2) geological storage in low permeability reservoirs have not been fully studied. Based on core samples from the Huang-3 area of the Ordos Basin, the feasibility and influential factors of geological CO2 sequestration in the Huang-3 area are analyzed through caprock breakthrough tests and a CO2 storage factor experiment. The results indicate that capillary trapping is the key mechanism of the sealing effect by the caprock. With the increase of caprock permeability, the breakthrough pressure and pressure difference decreased rapidly. A good exponential relationship between caprock breakthrough pressure and permeability can be summarized. The minimum breakthrough pressure of CO2 in the caprock of the Huang-3 area is 22 MPa, and the breakthrough pressure gradient is greater than 100 MPa/m. Huang-3 area is suitable for the geological sequestration of CO2, and the risk of CO2 breakthrough in the caprock is small. At the same storage percentage, the recovery factor of crude oil in larger permeability core is higher, and the storage percentage decreases with the increase of recovery factor. It turned out that a low permeability reservoir is easier to store CO2, and the storage percentage of carbon dioxide in the miscible phase is greater than that in the immiscible phase. This study can provide empirical reference for caprock selection and safety evaluation of CO2 geological storage in low permeability reservoirs within Ordos Basin.

Download Full-text

Study on optimal selection of porosity logging interpretation methods for Chang 73 segment of the Yanchang Formation in the southwestern Ordos Basin, China

Journal of Petroleum Science and Engineering ◽

10.1016/j.petrol.2020.108153 ◽

2021 ◽

Vol 198 ◽

pp. 108153

Author(s):

Hao Lu ◽

Qing Li ◽

Dali Yue ◽

Shenghe Wu ◽

Yupu Fu ◽

...

Keyword(s):

Ordos Basin ◽

Optimal Selection ◽

Yanchang Formation ◽

Selection Of

Download Full-text

Interaction analysis for CO2 geological storage and underground coal mining in Ordos Basin, China

Engineering Geology ◽

10.1016/j.enggeo.2015.07.017 ◽

2015 ◽

Vol 196 ◽

pp. 194-209 ◽

Cited By ~ 28

Author(s):

Wen Bin Fei ◽

Qi Li ◽

Xiao Chen Wei ◽

Ran Ran Song ◽

Miao Jing ◽

...

Keyword(s):

Coal Mining ◽

Interaction Analysis ◽

Ordos Basin ◽

Geological Storage ◽

Co2 Geological Storage ◽

Underground Coal Mining

Download Full-text

New Equipment for Complementary Petrophysical Characterization of Rocks for Deep Geological Storage

Proceedings ◽

10.3390/proceedings2231494 ◽

2018 ◽

Vol 2 (23) ◽

pp. 1494

Author(s):

Pablo Cienfuegos-Suárez ◽

Efrén García-Ordiales ◽

Jorge Enrique Soto-Yen

Keyword(s):

Co2 Sequestration ◽

Chemical Processes ◽

Geological Storage ◽

Co2 Geological Storage ◽

Coal Seams ◽

Geological Formation ◽

Physical And Chemical ◽

Geological Formations ◽

Selection Of

The geological storage of CO2 in coal seams is an emerging option in the portfolio of mitigation actions for reduction of atmospheric greenhouse gas concentrations. A background study focused to the selection of favorable sites for CO2 geological storage are necessary steps, and in the selection of reservoirs for CO2 sequestration a complete petrophysical characterization of the sample is necessary. To complement the classical petrophysical parameters measured on the rocks of the geological formation with potential to be used to store the injected CO2, a new equipment has been designed and constructed to simulate at a laboratory scale the inter-action between the rock and the injected CO2, at different pressure conditions simulating depths of the geological formations up to 1000 m. The design and construction of this equipment allows us to investigate known physical and chemical processes that occur between the rocks store/seal and the fluid injected into geological storage. Essays focused to study the alterability of the rock in contact with CO2 either in subcritical or supercritical state, as well as essays for CO2 injectivity on the rock can be accomplished.

Download Full-text

The Potential Effect of CO2-Water-Rock Reaction on The Caprock Formation (Mudstone) Case Study

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.140 ◽

2012 ◽

Vol 518-523 ◽

pp. 140-143 ◽

Cited By ~ 1

Author(s):

Yan Li ◽

Hai Long Tian ◽

Zou Zhuo ◽

Yuan Sun

Keyword(s):

Water Environment ◽

Potential Effect ◽

Geometrical Model ◽

Geological Storage ◽

Co2 Leakage ◽

Co2 Geological Storage ◽

Result Show ◽

Leakage Assessment ◽

Selection Of

By using a 1D column geometrical model this paper carried out research on the effects of CO2 penetration on the caprock properties. The result show that due to CO2 ingression the formation water environment changed greatly. The pH reduced to 3.8 from initial 7.48 and then buffered to 5.6; The supercritical CO2 reached to 0.006 m in the caprock, but aqueous CO2 reached to 1.1 m. The self-sealing efficiency worked after about 25 years, and the relevant minerals were calcite, quartz, kaolinite and calcite. The research will provide some technical reference for site selection of CO2 geological storage projects and CO2 leakage assessment.

Download Full-text