Fracture network types revealed by well test curves for shale reservoirs in the Sichuan Basin, China
Available online 27 September 2022
Pressure buildup testing can be used to analyze fracture network characteristics and conduct quantitative interpretation of relevant parameters for shale gas wells, thus providing bases for assessing...
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Carbon mitigation using CarbFix, CO2 plume and carbon trading technologies
Available online 25 September 2022
Following China and the United States, India is the third highest CO2 emitter in the world. With its fast rising population and an industry primarily reliant on coal and oil, the country's emissions...
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Mineralogy and element geochemistry of the Sohnari rocks of lower Eocene Laki Formation in the Southern Indus Basin, Pakistan: Implications for paleoclimate, paleoweathering and paleoredox conditions
Available online 22 September 2022
The Sohnari Member of the Lower Eocene Laki Formation is massively deposited in the Southern Indus Basin of Pakistan and is considered a potential source rock to generate hydrocarbons. However, the...
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Assessment of hydrocarbon generation potential and thermal maturity of the deep offshore Lamu Basin, Kenya
Available online 18 September 2022
In this study, the secondary well data for Cretaceous to Miocene cutting samples in four deep offshore exploration wells, i.e., Pomboo-1 in the north, Kubwa-1 in the central, Simba-1 and Kiboko-1 in...
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Superimposed hydrocarbon accumulation through multi-source and multi-stage evolution in the Cambrian Xixiangchi Group of eastern Sichuan Basin: A case study of the Pingqiao gas-bearing anticline
Available online 14 September 2022
The Xixiangchi Group in eastern Sichuan Basin has great potential for natural gas exploration and development. However, there is a lack of in-depth studies of the hydrocarbon sources and the formation...
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Effect of CO2 flooding in an oil reservoir with strong bottom-water drive in the Tahe Oilfield, Tarim Basin, Northwest China
Available online 15 August 2022
The dissolution and diffusion of CO2 in oil and water and its displacement mechanism were investigated by laboratory experiment and numerical simulation for Block 9 in the Tahe oilfield, a sandstone...
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Production data-based facies analysis for well placement in thin-layered reservoir
July 2022
The exploitation of a thin-layered reservoir with thickness less than 5 m (16 ft) needs to rely upon sedimentary facies analysis, due to the low resolution of seismic data and sparse well data. However,...
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Toxicological effects of mining hazard elements
July 2022
Mining plays a prominent role in the economy worldwide since human efforts have been more concentrated in extraction than recycling of natural resources. Ores composed of various minerals vary according...
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Bowland Shale well placement strategy – Part 2: Fracture simulations using a 3D geomechanical model and implications for stratigraphic and spatial horizontal well locations
July 2022
Hydraulic fracture modelling is a key component of a shale reservoir well placement strategy as it provides an indication of the typical lengths and heights of stimulated fractures and of the changes...
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A review of commercial development of continental shale oil in China
July 2022
Continental shale oil is an important strategic supplement to the sustainable development of petroleum industry in China. Based on the thermal maturity of organic matter, most shale oil in China is...
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Estimating the expected value of multiple prospects in bidding blocks
July 2022
In recent years, China has accelerated the reform of its oil and gas management system, especially in competitive transfer of mining rights. Evaluating the expected value (EV) of lease blocks is crucial...
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Types and genesis of sweet spots in the tight sandstone gas reservoirs: Insights from the Xujiahe Formation, northern Sichuan Basin, China
July 2022
Through comprehensively applying geological and geophysical data, as well as core and thin section observation, the characteristics of reservoirs and fractures in the second member of the Xujiahe Formation...
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Prediction of pore volume compressibility by a new non-linear equation in carbonate reservoirs
July 2022
Pore volume compressibility is an essential parameter in reservoir studies, as it plays a major role in recovery mechanisms. Over the past decades, many attempts have been made to establish a link between...
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Geochemical, mineralogical, and petrological characteristics of the Cretaceous coal from the middle Benue Trough Basin, Nigeria: Implication for coal depositional environments
July 2022
The Benue Trough Basin (BTB) of Nigeria is geologically and geo-morphologically subdivided into upper, middle, and lower segments. The BTB is the subject of geological research due to its rich coal...
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The impact of salinity, alkalinity and nanoparticle concentration on zeta-potential of sand minerals and their implication on sand production
July 2022
The effect of brine salinity, cation type, pH, and produced sand on zeta potential (ZP) measurements with and without the presence of silica nanoparticles is investigated through pH measurement, static...
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Sedimentary facies and textural characteristics of Cretaceous sandstones in the southern Bida Basin, Nigeria: Implication for reservoir potential and depositional environment
July 2022
A study of sedimentary facies, mineral and textural characteristics of sections of conglomerates/pebbles and sandstone facies found within the Lokoja and Patti Formations in southern Bida Basin, Nigeria,...
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Recent advances in petrophysical and geophysical characterization of unconventional resources: Introduction
Available online 19 July 2022
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Characteristics of water alternating CO2 injection in low-permeability beach-bar sand reservoirs
Available online 6 July 2022
Water flooding can be ineffective in highly heterogeneous low-permeability beach-bar sand reservoirs. The introduction of CO2 flooding helps boost the oil production of the reservoirs but only in an...
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Adaptability analysis and optimization of log suite for uncased wellbores of shale gas reservoirs: A case study of Sichuan Basin, China
Available online 18 June 2022
Significant progress has been made in the exploration and development of unconventional gas resources in China since the beginning of the 21st century. With a rapid increase in yield, the exploration...
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Remaining oil distribution characteristics in an oil reservoir with ultra-high water-cut
Available online 15 June 2022
An accurate mapping and understanding of remaining oil distribution is very important for water control and stabilize oil production of mature oilfields in ultra-high water-cut stage. Currently, the...
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Displacement characteristics of CO2 flooding in extra-high water-cut reservoirs
Available online 15 June 2022
Carbon dioxide (CO2) flooding is a widely applied recovery method during the tertiary recovery of oil and gas. A high water saturation condition in reservoirs could induce a ‘water shielding’ phenomenon...
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Environmental degradation through mining for energy resources: The case of the shrinking Laguna Santa Rosa wetland in the Atacama Region of Chile
April 2022
As the world strives to replace fossil fuels with clean energy – reflected by global surge in the number of electric vehicles – the environmental impact of mining all the lithium (Li) needed to enable...
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Effect evaluation of shale types on hydrocarbon potential using well logs and crossplot approach, Halewah oilfield, Sab'atayn Basin, Yemen
April 2022
Log-analysts typically distinguish three types of shale distribution in clastic reservoirs, that is, laminated, dispersed and structural distribution, which tend to influence the effective porosity...
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GIS based integration of multi-spectral remote sensing and morphostructural analysis for delineating potential areas of hydrocarbon exploration in Western Vindhyan Basin, India
April 2022
The Chambal Valley forms the western part of the Proterozoic Vindhyan Basin that has been less studied and poorly explored from the hydrocarbon perspective than its eastern counterpart—the Son Valley...
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