The new method to predict the early productivity of ultra-low permeability reservoir in Ordos Basin

2011 ◽  
Author(s):  
Baoge Cao ◽  
Mingqiang Chen
Keyword(s):  
Ordos Basin ◽  
New Method ◽  
Low Permeability ◽  
Low Permeability Reservoir

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

Energies ◽  
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.

Ultra Low Permeability Reservoir Characteristics and Origin Analysis

2011 ◽  
Vol 361-363 ◽  
pp. 51-54
Author(s):  
Hong Yan Yu ◽  
Hong Qi Li
Keyword(s):  
Large Scale ◽  
Ordos Basin ◽  
Physical Property ◽  
Research Area ◽  
Low Permeability ◽  
Storage Space ◽  
Low Permeability Reservoir ◽  
Microscopic Feature ◽  
Depositional Setting ◽  
High Range

As the result of its special structural feature and depositional setting, Ordos Basin formed large scale low-permeability reservoir. According to scanning electron microscope, casting sheet image, core observation, physical property analysis and core analysis testing, this paper summarized and analyzed ultra low permeability reservoir microscopic feature of Ordos Basin Baibao area Chang63. Reservoir microscopic feature is controlled by deposition and diagenesis. Deposition decided reservoir lithology, interstitial content and sizes of primary pores. Compaction and cementation of diagenesis destroyed primary pores, but denudation provided high range secondary pores, which improved storage space of the research area.

Laboratory Studies of Immiscible N2 WAG Flooding for Low Permeability Reservoir of Ordos Basin

2011 ◽  
Vol 347-353 ◽  
pp. 1663-1668
Author(s):  
Hai Huang
Keyword(s):  
Experimental Work ◽  
Relative Efficiency ◽  
Ordos Basin ◽  
Formation Condition ◽  
Low Permeability ◽  
Laboratory Studies ◽  
Low Permeability Reservoir ◽  
Effect Of Water ◽  
Water Alternating Gas

This paper presents experimental work that quantifies the effect of water-alternating-gas (WAG) variables on the immiscible N2 flooding process for low permeability reservoir of Ordos Basin. Many experiments were done with the sand-packed model under the formation condition. The results may be used to determine such parameters as injection pattern, WAG radio, and the number of WAG slugs. Analysis of the relative efficiency of each WAG slug is discussed.

The Influence of Dynamic Capillary Pressure on the Seepage of Ultra-Low Permeability Reservoir

2014 ◽  
Vol 7 (1) ◽  
pp. 55-63 ◽  
Author(s):  
Haiyong Zhang ◽  
Shunli He ◽  
Chunyan Jiao ◽  
Guohua Luan ◽  
Shaoyuan Mo
Keyword(s):  
Capillary Pressure ◽  
Low Permeability ◽  
Low Permeability Reservoir ◽  
Dynamic Capillary Pressure
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