Features of the carboniferous volcanic rocks fracture reservoirs in Hongshanzui oilfield, Junggar Basin

Jindong, Cui; Zhang, Jiazheng; Zhang, Hongyan

doi:10.1007/s12583-013-0397-z

Cited by 15 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Logging data, including conventional and imaging logging data from 18 wells, were obtained to interpret the fracture characteristics, including orientation, dip angle, scale, and fracture density (Cui et al, 2013). In this study, we calculated the fracture linear density as the total number of fractures per unit core length or the total number of fractures divided by the total length in the imaging log data (Ortega et al, 2006).…”

Section: Methodsmentioning

confidence: 99%

Characteristics of fractures development and its controlling factors within the buried hill reservoirs from the Archaean metamorphic basement in the Bozhong Sag, Bohai Bay Basin, Eastern China

Wang

Yi²,

Shan³

et al. 2022

Front. Earth Sci.

View full text Add to dashboard Cite

Metamorphic rocks have almost no primary pore space, and their formation of large-scale reservoirs depends on fractures and related secondary pore space formed by tectonic and fluid activities. The BZ19-6 block in the Bozhong Sag, Bohai Bay Basin, is the largest and deepest buried basement condensate field of buried-hill in the world, and its reservoirs are characterized by strong heterogeneity. In this paper, we systematically summarize the characteristics of fracture development, explore the main factors controlling fracture development, establish a fracture development model and clarify the influence of fractures on reservoir quality by using core and microscopic thin section observations, physical property data, imaging logging data and 3D seismic data analysis. The results show that the major types of fractures in the study area are tectonic fractures and dissolution fractures. In particular, the tectonic fractures are widely developed, accounting for 71.7% of the total number of fractures. Migmatization controls the lithological distribution of Archean metamorphic rocks. The migmatitic granite, having the highest degree of migmatization, is the dominant lithology for fracture development because it is rich in brittle minerals, such as feldspar and quartz. Strong compressional orogeny occurred during Indosinian period when many fractures initially developed, which become dominant among the tectonic fractures. Compression-tension-compression multistage tectonic movements characterized the Yanshanian period. During this period, fractures of different degrees formed. The Himalayan period, critical for fracture reconstruction, reactivated the early fractures and promoted the positive influence of atmospheric freshwater and organic acids on fracture reconstruction. Fractures are distributed unevenly in the vertical direction, and fracture-intensive zones are the main development sites for favourable reservoirs because they enhance the porosity and permeability of Archean metamorphic rocks. It means that these fractures can provide effective storage space for oil and gas, which is key for the formation of large-scale reservoirs. In addition, fractures can provide migration channels for organic acids and atmospheric freshwater, which lead to later dissolution, and connect various dispersed dissolution pores to improve the effectiveness of reservoir space.

show abstract

Section: Methodsmentioning

confidence: 99%

Characteristics of fractures development and its controlling factors within the buried hill reservoirs from the Archaean metamorphic basement in the Bozhong Sag, Bohai Bay Basin, Eastern China

Wang

Yi²,

Shan³

et al. 2022

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…(Wang et al, 2019;Ye et al, 2021;. The permeability of such reservoirs is significantly improved by the tectonic fractures and their associated secondary pores (Lyu et al, 2019), it provides a effective pathways for oil and gas migration and reservoir space for oil and gas accumulation (Cui et al, 2013). In addition, tectonic fractures connect "geological sweet spots" and "engineering sweet spots" together (Wang et al, 2017;Gong et al, 2021), therefore, the study of tectonic fractures in metamorphic buried hill reservoirs should run through the whole exploration and development process.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and controlling factors of tectonic fractures within the buried hill reservoirs from the Archaean metamorphic basement: a case study in the Bozhong 19–6 condensate gas field, Bohai Bay Basin

Liu,

Cheng,

Liao

et al. 2024

Front. Energy Res.

View full text Add to dashboard Cite

The Bozhong 19–6 Condensate gas field is the first giant gas field discovered in the Bohai Bay Basin in recent years. The gas field reservoir has diverse reservoir space and strong heterogeneity.In this paper, we systematically summarize tectonic fractures development patterns and explore the main factors controlling fractures development and clarify the influence of fractures on reservoir quality through core and microscopic thin section observations, physical property data, imaging logging data. The results show that the major types of tectonic fractures in study area are shear fractures, followed by tensile fractures. Study area mainly developed high-angle fractures and completely filled fractures, fractures are commonly filled with carbonate and clay cement. Four groups of tectonic fractures were found in the study area, which corresponds to the four fracture formation period. Tectonic movement controls the fractures development in study area, the multi-stage tectonic movement had caused a complex fractures network system. The faults control the development of associated fractures formation in the fractures zone, different faults control the fractures formation and orientations in the vicinity. Rock type and minrals content is the basis of forming different fractures, such as the high felsic content is the basis of developed fractures in metamorphic rocks, and rock layer thickness, reservoir porosity and permeability are important factors of the fractures development heterogeneity longitudinally.

show abstract

“…e Carboniferous basement in the Xiquan block is a nearly north-southtrending paleo-uplift, in which the Carboniferous strata on the top of the west wing are denuded, and the strata on the east wing dipped eastward. e proven oil reserves of the Carboniferous stratum in the Xiquan block in 2017 are 2010.15 × 10 4 t. e oil reservoir is mainly controlled by structure and rock mass, and the lithology of the reservoir is mainly pyroclastic rocks, including breccia tu and volcanic breccia [3,4]. e porosity of Carboniferous reservoirs is between 13.2 and 22.9%, and the permeability distribution ranges from 0.10 to 1.85 mD.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Carboniferous Volcanic Reservoirs in Beisantai Oilfield, Junggar Basin

Cheng¹,

Ma²,

Dong³

et al. 2022

Mathematical Problems in Engineering

View full text Add to dashboard Cite

In recent years, petroleum exploration in the Carboniferous volcanic rock reservoirs in the Junggar Basin has been the focus of important petroleum energy development in western China. The lithologic identification of volcanic rock reservoirs seriously restricts the accuracy of reservoir prediction and affects the success rate of oil exploration. Different types of volcanic rocks have different petrological characteristics and mineral assemblages, especially affected by the depositional environment. The volcanic rocks in different regions have their own uniqueness. This paper takes the Carboniferous volcanic reservoirs in Xiquan block, Beisantai Oilfield, Junggar Basin as the research target. Through a large number of core observations, casting slices, scanning electron microscopy, and X-ray diffraction methods, the Carboniferous volcanic rocks are analyzed. The petrology, pore characteristics, physical properties, and diagenetic evolution history of the reservoir are analyzed. The study shows that the volcanic facies in the Xiquan block can be divided into explosive facies, overflow facies, and volcanic sedimentary facies, among which the explosive facies is subdivided into empty subfacies (volcanic breccia-breccia tuff combination) and thermal base wave subfacies (tuff). The lithology of the reservoir is pyroclastic rock and volcanic lava, belonging to medium-porous and ultralow permeability reservoirs, and the storage space can be divided into three types: primary pores, secondary pores, and fractures. The lithology of key exploration is breccia tuff, followed by breccia tuff and volcanic breccia.

show abstract

Features of the carboniferous volcanic rocks fracture reservoirs in Hongshanzui oilfield, Junggar Basin

Cited by 15 publications

References 8 publications

Characteristics of fractures development and its controlling factors within the buried hill reservoirs from the Archaean metamorphic basement in the Bozhong Sag, Bohai Bay Basin, Eastern China

Characteristics of fractures development and its controlling factors within the buried hill reservoirs from the Archaean metamorphic basement in the Bozhong Sag, Bohai Bay Basin, Eastern China

Characteristics and controlling factors of tectonic fractures within the buried hill reservoirs from the Archaean metamorphic basement: a case study in the Bozhong 19–6 condensate gas field, Bohai Bay Basin

Characteristics of Carboniferous Volcanic Reservoirs in Beisantai Oilfield, Junggar Basin

Contact Info

Product

Resources

About