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ISSN: 2666-5190

In-situ stress analysis in the Chang 7 reservoir of northern Shannxi region

The Shaanbei Chang 7 shale oil reservoir in the Ordos Basin develops vertically with multiple lithologic superimpositions. The interlayer stress of sand-mud-shale thin interbeds is different, and the...

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Study on microscopic failure mechanism and numerical simulation of sandstone under different saturated pressure

X-ray diffraction and SEM scanning are conducted to examine the alterations in sandstone under different saturation conditions to reveal the water-rock softening effect on sandstone from the Qilicun...

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Hydrogen's organic genesis

Natural hydrogen exploration has been restricted in scope due to the predominance in thinking that various rock interactions with water in cratonic settings offer the best natural hydrogen sources....

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The Early Cretaceous structural features and its influence on hydrocarbon accumulation in the southern Hurenbuqi depression, Erlian Basin

The Hurenbuqi Sag, located on the Bayinbaolige uplift in the northern Erlian Basin, is a secondary depression rich in oil. In order to study the influence on hydrocarbon accumulation of the Early Cretaceous...

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Comparative experimental investigation on permeability and pressure bearing capacity of different types of temporary plugging bodies

Temporary plugging and diversion fracturing technology play a vital role in boosting the production of tight reservoirs. The increase of net pressure in fractures is the core of temporary plugging diversion...

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The optimization of the well pattern thinning at high water cut stages in CD Heterogeneity oilfield

Water-flooding reservoirs often face challenges such as low remaining geological reserves and high production costs during the high water cut stage. Well pattern thinning presents a promising solution...

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Impact of fracturing fluid retention and flowback on development effect after large scale fracturing in shale oil wells: A case study from the shale oil of Chang 7 Member, Yanchang Formation, Ordos Basin

In order to reveal the impact of fracturing fluid retention and flowback on the development effect after large-scale fracturing in shale oil wells, and to formulate a reasonable flowback policy, this...

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Organic petrography and geochemistry of the Fu 2 member of the Paleocene Funing formation, Gaoyou Depression, Subei Basin, Eastern China: Implications for shale oil potential

The Fu 2 Member of the Paleocene Funing Formation in the Gaoyou Depression, Subei Basin is an organic matter-rich formation, and has a high potential for shale oil exploration and exploitation. Total...

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A novel method for quantitative evaluation of oil content and mobility in shale oil reservoirs by NMR logging: a case study of the inter-salt shale oil in the Jianghan Basin

The evaluation of oil content and mobility in shale oil reservoirs is the key to the optimization of the "sweet spot" of shale reservoirs and the evaluation of available resources. In order to address...

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Relationship between box-counting fractal dimension and properties of fracture networks

Due to the capacity to quantify the complexity of a fracture network, fractal dimension (D) is widely applied in analyzing fracture network-related issues, such as connectivity and permeability. While...

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Status and perspectives on CCUS clusters and hubs

Carbon Capture, Utilization, and Storage (CCUS) refers to the process of capturing and separating CO2 from emission sources such as energy utilization and industrial processes, or directly from the...

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Lithological and diagenetic variation of mixed depositional units in the middle permian saline lacustrine deposition, Junggar Basin, NW China

Mixed depositional reservoirs are widely distributed in Junggar Basin, NW China. These reservoirs are featured by complex lithology, ultra-low permeability and extremely heterogeneous pore structures...

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Identification of natural fractures in shale gas reservoirs using fracture signature function and machine learning models

Identifying fractures is important for optimizing recovery and enhancing oil recovery techniques. Identifying natural fractures using FMI and cores is expensive and unavailable for all wells. Therefore,...

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Drilling fluids for shale fields: Case studies and lessons learnt

In recent years, Shale gas has been the fastest-growing energy source in the world. In USA, shale gas now contributes to more than 60 % of natural gas supply. In China, annual shale gas production climbed...

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Synthesis of mixed methane-ethylene hydrate with ice powder

The study of gas hydrate researched by the ice powder method is helpful for us to understand the storage, separation, transportation and transformation of gas on the solid surface. In this work, the...

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Logging identification of complex lithology of the Lower Jurassic Da'anzhai Member in the eastern slope of the western Sichuan Depression

In recent years, with the in-depth development of oil and gas exploration in the eastern slope of the western Sichuan Depression, breakthroughs have been made in the research on high-quality gas reservoirs...

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Source rock and reservoir qualities of middle Jurassic Lianggaoshan lacustrine shale at fuxing area, Sichuan Basin: Implication for shale-oil enrichment

The shale oil exploration, in the Middle Jurassic Lianggaoshan Formation in the Fuxing area of Sichuan Basin, is in preliminary stage, requiring further in-depth study on shale oil and gas enrichment...

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Characteristics of water occurrence in coalbed methane reservoir

The presence of water, competing with methane for the space, weakens the ability of methane adsorption and diffusion in coal dramatically. The study on the occurrence of water in coal has direct effects...

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Methods for identifying complex lithologies from log data based on machine learning

The sedimentary environment of the marine-continental transitional facies leads to complex reservoir lithologies characterized by rapid changes in lithology, the presence of thin interbeds, and strong...

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Quantitative characterization on dynamic methane flow in Chinese marine shales: An experimental study

The dynamic characteristics of shale gas flow directly affect the high-efficiency exploitation of shale gas, which has attracted widespread attention. In this study, the flow rate and permeability of...

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Geochemical characteristics and sedimentary environment of source rocks in the Qiangtang Basin: New discoveries from the upper Triassic Xiaochaka formation in the Woruoshan Mountain

Clarifying the sedimentary environment and main controlling factors of source rocks is significant for the oil and gas exploration in the Qiangtang Basin. Based on the detailed observation results,...

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Diagenesis of tight sandstone and its influence on reservoir properties: A case study of Fuyu reservoirs in Songliao Basin, China

Diagenesis is the primary cause of the densification of the Fuyu reservoir in Sanzhao sag, Songliao Basin. In this paper, the types of diagenesis, the influence of diagenesis on reservoir physical properties...

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Brittleness assessment of the shale oil reservoir based on neural network method: A case study of the Yanchang Formation, Ordos Basin

The Chang 7 oil-bearing layer of Yanchang Formation is rich in shale oil resources. However, the reservoir indicates strong reservoir heterogeneity and has obvious differences in productivity among...

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Feature selection in GC-MS, NMR and MALDI-TOF spectra of tar sand bitumen

Expectations from unconventional reservoirs are often overly optimistic when estimation criteria are transferred from one location to another but some of the many important elements of petroleum systems...

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3-D tight sandstone gas outcrop simulation based on unmanned aerial vehicle oblique photography data— A case study from the Pingtouxiang outcrop in North Shanxi, China

Current methods of acquiring data from outcrops with tight gas rocks yield insufficient data. To resolve this, unmanned aerial vehicle (UAV) oblique photogrammetry was used to quantitatively assess...

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