Research on the physical properties of supercritical CO2 and the log evaluation of CO2-bearing volcanic reservoirs

Self-jetting high-yield oil flow was obtained from Ma 67 and Ma 36 wells drilled in the volcanic reservoirs of the Haerjiawu Formation in the Santanghu Basin, China. This has shifted the prospectors’ attention to the Haerjiawu Formation from the Kalagang Formation, which is generally considered to have favorable physical properties. To further explain the geological reasons why oil flow can jet itself from the volcanic rocks in the Haerjiawu Formation with poor physical properties, this study carries out a systematic comparison on the microscopic pore structures of volcanic rocks through unconventional tests such as low-temperature nitrogen adsorption, high-pressure mercury injection, and constant-rate mercury injection based on the analyses of physical properties and minerals. The results obtained are as follows. The volcanic rocks of the Kalagang Formation have relatively high pore permeability. However, their micropores have a wide distribution range of pore size and feature highly meandering structures and strong heterogeneity. Meanwhile, small pore throats connect large pores in the volcanic rocks, resulting in a relatively high pore/throat ratio. All these are conducive to the occurrence of tight oil and gas but unfavorable for the flow of oil and gas. The volcanic rocks in the Haerjiawu Formation have relatively low volcanic permeability. However, small pores connect large pore throats in the volcanic rocks; thus, leading to a relatively low pore/throat ratio. Meanwhile, the volcanic rocks feature low meandering structures, strong homogeneity, and high connectivity. All these are favorable for the formation of tight oil and gas reservoirs. These assessment results also indicate that the assessment indices of tight volcanic reservoirs should not only include porosity and permeability. Instead, more attention should be paid to the microscopic pore structures, and it is necessary to analyze the charging and flow of tight oil from the configuration of pores and pore throats. This study not only explains the geological factors of the wells with self-jetting high-yield oil flow in the Haerjiawu Formation from the perspective of microscopic pore structures but also provides a new idea and comparison method for the assessment of tight reservoirs in other areas.

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Predictive dimensionless solubility (pDS) model for solid solutes in supercritical CO2 that requires only pure-component physical properties

Chemical Engineering Research and Design ◽

10.1016/j.cherd.2018.04.033 ◽

2018 ◽

Vol 136 ◽

pp. 251-261 ◽

Cited By ~ 6

Author(s):

Masaki Ota ◽

Yoshiyuki Sato ◽

Richard L. Smith ◽

Hiroshi Inomata

Keyword(s):

Physical Properties ◽

Supercritical Co2 ◽

Pure Component

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Durability Assessment and Physical Properties Investigation of Modified Petung Bamboo (Dendrocalamus asper) as Resulted on Acetylation, Assisted by Supercritical CO2

Procedia Chemistry ◽

10.1016/j.proche.2014.05.034 ◽

2014 ◽

Vol 9 ◽

pp. 273-283 ◽

Cited By ~ 3

Author(s):

Silviana ◽

S. Kareth ◽

M. Petermann

Keyword(s):

Physical Properties ◽

Supercritical Co2 ◽

Durability Assessment ◽

Dendrocalamus Asper

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Composition and physical properties of babassu seed (Orbignya phalerata) oil obtained by supercritical CO2 extraction

The Journal of Supercritical Fluids ◽

10.1016/j.supflu.2019.04.009 ◽

2019 ◽

Vol 150 ◽

pp. 21-29 ◽

Cited By ~ 10

Author(s):

Naila Albertina de Oliveira ◽

Mônica Roberta Mazzali ◽

Heidge Fukumasu ◽

Cintia Bernardo Gonçalves ◽

Alessandra Lopes de Oliveira

Keyword(s):

Physical Properties ◽

Supercritical Co2 ◽

Supercritical Co2 Extraction

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The Physical Properties and their Prediction of Volcanic Reservoirs in Luxi Area of Junggar Basin, China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.616-618.228 ◽

2012 ◽

Vol 616-618 ◽

pp. 228-233

Author(s):

Zhong Chun Sun ◽

Zhong Hong Chen ◽

Yu Hua Kong ◽

Wen Liu ◽

Men Yun Yang

Keyword(s):

Physical Properties ◽

Volcanic Rocks ◽

Junggar Basin ◽

Electrical Parameters ◽

Clastic Rocks ◽

Close Relationship ◽

Porosity And Permeability ◽

Different Characteristics ◽

Volcanic Reservoirs ◽

The Relationship

The physical properties of reservoirs determine the ability on accumulating hydrocarbon. As one of the unconventional hydrocarbon reservoirs, the volcanics own the different characteristics from the clastic rocks on physical properties. The study on the relationship between physical and electrical properties of deep volcanic reservoirs was conducted, using the Luxi area of Junggar basin as an example. By our study, some conclusions have been made: The heterogeneity of physical properties is strong in volcanic rocks whose porosity and permeability vary in different lithology and lithofacies; different rocks in a same well have various values of porosity and permeability, and a certain type of volcanic rock has different values of porosity and permeability in diverse wells. According to measured data, the value of porosity an permeability in erupting and effusive facies area are high, while in volcanic channel and extrusive facies as well as volcanic sedimentation facies are low. Unlike the clastic rocks, in volcanic rocks there is little relationship between porosity and permeability and all of them do not have close relationship to the buried depth. Different electrical responses have different relationship with the porosity of one certain lithology, while one certain electrical property has different responses for the porosities of different lithologies; comparatively speaking, the porosities of tuffites, breccia correlate intensively with GR, SP and AC, so these electrical parameters can be utilized to predict the physical properties. This study illustrated that the relativities between porosity and GR, AC, and SP are Por=-0.6189×GR+52.691 (R2=0.9311), Por =-0.3771×AC + 34.5 (R2=0.8876) and Por = 2.1458×SP + 79.404 (R2=0.8236).

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Study on Using High Temperature Steam Preparation of Ultra Light Foam TPU Pellets Based Supercritical CO2

Journal of Physics Conference Series ◽

10.1088/1742-6596/2152/1/012010 ◽

2022 ◽

Vol 2152 (1) ◽

pp. 012010

Author(s):

Zhou Li ◽

Qin Liu

Keyword(s):

High Temperature ◽

Physical Properties ◽

Supercritical Co2 ◽

Processing Time ◽

Experimental Results ◽

Structure And Properties ◽

Steam Temperature ◽

Condition Change ◽

Granule Structure ◽

High Temperature Steam

Abstract This paper mainly introduces the technology of supercritical CO2 pretreatment and high temperature steam preparation of super mild foaming TPU pellets. Mainly discusses the supercritical CO2 pretreatment preparation ultra mild foaming TPU pellets process in high temperature steam condition change of TPU micro foaming granule structure and properties of impact. Experimental results show that the high temperature steam temperature, processing time will influence TPU granules of microporous quantity, structure, resulting in pellets of different physical properties.

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Reservoir Formation Model and Main Controlling Factors of the Carboniferous Volcanic Reservoir in the Hong-Che Fault Zone, Junggar Basin

Energies ◽

10.3390/en13226114 ◽

2020 ◽

Vol 13 (22) ◽

pp. 6114

Author(s):

Danping Zhu ◽

Xuewei Liu ◽

Shaobin Guo

Keyword(s):

Physical Properties ◽

Fault Zone ◽

Oil And Gas ◽

Hanging Wall ◽

Volcanic Rocks ◽

Soil Layer ◽

Junggar Basin ◽

Weathering Crust ◽

Volcanic Reservoir ◽

Volcanic Reservoirs

The Hong-Che Fault Zone is one of the important oil and gas enrichment zones in the Junggar Basin, especially in the Carboniferous. In recent five years, it has been proven that the Carboniferous volcanic rock has 140 million tons of oil reserves, and has built the Carboniferous volcanic reservoir with a capacity of million tons. Practice has proven that the volcanic rocks in this area have great potential for oil and gas exploration and development. To date, Carboniferous volcanic reservoirs have been discovered in well areas such as Che 32, Che 47, Che 91, Chefeng 3, Che 210, and Che 471. The study of drilling, logging, and seismic data shows that the Carboniferous volcanic reservoirs in the Hong-Che Fault Zone are mainly distributed in the hanging wall of the fault zone, and oil and gas have mainly accumulated in the high part of the structure. The reservoirs are controlled by faults and lithofacies in the plane and are vertically distributed within 400 m from the top of the Carboniferous. The Carboniferous of the Hong-Che Fault Zone has experienced weathering leaching and has developed a weathering crust. The vertical zonation characteristics of the weathering crust at the top of the Carboniferous in the area of the Che 210 well are obvious. The soil layer, leached zone, disintegration zone, and parent rock developed from top to bottom. Among these reservoirs, the reservoirs with the best physical properties are mainly developed in the leached zone. Based on a comprehensive analysis of the Carboniferous oil and gas reservoirs in areas of the Chefeng 3 and Che 210 wells, it is believed that the formation of volcanic reservoirs in the Hong-Che Fault Zone was mainly controlled by structures and was also controlled by lithofacies, unconformity surfaces, and physical properties.

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The Photometric Properties of the Ap Stars

International Astronomical Union Colloquium ◽

10.1017/s0252921100080684 ◽

1976 ◽

Vol 32 ◽

pp. 365-377 ◽

Cited By ~ 2

Author(s):

B. Hauck

Keyword(s):

Physical Properties ◽

Ap Stars

The Ap stars are numerous - the photometric systems tool It would be very tedious to review in detail all that which is in the literature concerning the photometry of the Ap stars. In my opinion it is necessary to examine the problem of the photometric properties of the Ap stars by considering first of all the possibility of deriving some physical properties for the Ap stars, or of detecting new ones. My talk today is prepared in this spirit. The classification by means of photoelectric photometric systems is at the present time very well established for many systems, such as UBV, uvbyβ, Vilnius, Geneva and DDO systems. Details and methods of classification can be found in Golay (1974) or in the proceedings of the Albany Colloquium edited by Philip and Hayes (1975).

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