Types of lithofacies in the Lower Cambrian marine shale of the Northern Guizhou Region and their suitability for shale gas exploration
October 2024
The lithofacies and thermal maturity of the over-mature Lower Cambrian marine shale in the Northern Guizhou Region, and their impacts on reservoir properties in this shale were analyzed by combining...
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An experimental study of the effect of temperature on teeth breaking efficiency based on rock mechanical properties
October 2024
To master changes in rock mechanical properties and the impact of high temperature on rock-breaking efficiency, the rock mechanical properties of granite, limestone, and sandstone under different temperatures...
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Integrated study of hydraulic/CO2 fracturing and production coupled with a THM-D process in ultra-shallow shale reservoirs
October 2024
To explore fracturing technology for vertical wells in ultra-shallow shale gas reservoirs, a coupled thermo-hydro-mechanical-damage (THM-D) fracturing and production integration model is established...
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A reverse biomarker-derived maturity trend in Triassic Yanchang Formation shales from the Ordos Basin in China
October 2024
Organic-rich shales from the Triassic Yanchang Formation in the Ordos Basin in China are mainly derived from aquatic organisms with type II kerogen. A reverse maturity trend, derived from the commonly...
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Generic layout optimization design methodology for China's loop-star natural gas field pipeline network
October 2024
The layout optimization design of a natural gas gathering pipeline network is a multi-objective optimization problem because the extant theories are unable to meet the different decision preferences...
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Pore heterogeneity and evolution of the Lower Silurian Longmaxi shale reservoir in the Southern Sichuan Basin: Responses to sedimentary environment
October 2024
As the cornerstone for evaluating the storage capacity of shale reservoirs and assessing the viability of shale gas exploitation, shale pores play a very important role in shale reservoirs. Based on...
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Fluid activity characteristics of shallow shale veins in the Wufeng–Longmaxi Formation in the Shixi syncline in northern Guizhou and their significance for shale gas preservation
October 2024
Preservation conditions are key to enriching shallow shale gas. Therefore, the veins of two typical wells in the Shixi syncline in northern Guizhou as research objects. Based on core observation, vein...
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Fracture features and fault influence on gas accumulation in the Longmaxi Formation in Changning block, southern Sichuan Basin
October 2024
The Lower Silurian Longmaxi Formation is a major horizon for shale gas development in the Changning block in Sichuan Basin. In this study, the fracture features in the Longmaxi Formation in the Changning...
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A novel EUR prediction model for fractured horizontal shale gas wells based on material balance theory
October 2024
Accurately predicting the estimated ultimate recovery (EUR) of shale gas wells is key to formulating a shale gas reservoir development plan. However, in practice, determining the EUR remains challenging...
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Experimental study on the diffusion process of natural gas from buried pipelines to underground confined spaces
October 2024
In recent years, leakage from buried gas pipelines has been a frequent occurrence around the world. Leaked gas can quickly diffuse and accumulate in adjacent confined spaces, such as inspection wells,...
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Impact of rock strength degradation by fluid intrusion on borehole stability in shale
October 2024
The interaction between shale bedding planes and fluids significantly weakens their structural integrity, profoundly affecting borehole stability in shale reservoirs. However, traditional analyses often...
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Simulation analysis of gas–liquid flow and mass transfer in a shaking triethylene glycol dewatering absorber
August 2024
Tall towers with large diameters on floating liquefied natural gas devices are highly sensitive to sway. If tower equipment is relatively high, swaying can easily cause uneven gas–liquid contact in...
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Analyses of the characteristics and main controlling factors of shale pores in the Niutitang Formation in the Guizhou region
August 2024
The shale of the Lower Cambrian Niutitang Formation in the Guizhou region has undergone complex diagenesis and has developed different types of pore textures, which affect the occurrence status of shale....
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Creep behavior of marine Wufeng–Longmaxi Formation shales in the Sichuan Basin, Southwest China characterized at micro scale: A case study of exploration well SQ-1 in Sanquan Town, Nanchuan District, Chongqing
August 2024
Creep behavior is a very important attribute of shale and is crucial in the design of hydraulic fracturing schemes to ensure the long-term stable development of shale gas. However, how different shale...
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Investigation of the effect of bedding and confining pressure on the energy evolution of shale during the unloading process
August 2024
To explore the effect of bedding and initial confining pressure on the energy evolution characteristics of shale during the unloading process, samples were drilled with different bedding angles, unloading...
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Hydrocarbon accumulation process and reservoir-forming models of structure A in the central inversion tectonic belt of the Xihu Depression, East China Sea Basin
August 2024
The Huagang Formation of the central inverted structural tectonic belt structure A in the Xihu Depression has abundant hydrocarbon resources. This is an important area for exploration and development...
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Optimization of Jiyang depression block X shale condensate reservoir well spacing based on geology–engineering integration
August 2024
Appropriate well spacing is crucial for the efficient development of shale reservoirs, as it is closely related to the degree of resource utilization. Well spacing design is influenced by both fracturing...
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Numerical modeling of deep coalbed methane accumulation in the central-eastern Ordos Basin, China
August 2024
Deep coalbed methane (CBM) has become one of the most significant potential sources of natural gas in China. However, the exploration and development of deep CBM in China is still in an initial stage,...
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Exploring the prospects of deep natural gas resources from the geochemical parameters of the Shahejie Formation source rocks in the Banqiao depression
August 2024
Deep natural gas is an important field and direction for oil and gas exploration and development in the Banqiao depression. The geochemical characteristics of the Paleogene Shahejie Formation source...
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Experimental study and thermodynamic modeling of CO2+CH4 gas mixture hydrate phase equilibria for gas separation efficiency
August 2024
Gas separation is a critical application of gas hydrates, and accurately predicting separation performance is crucial. In this study, we used thermodynamic calculations to predict the equilibrium phase...
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Experimental study on directional fracturing by slotted hydraulic blasting in underground drilling
August 2024
This paper proposes a method for creating a three-dimensional (above-ground and underground) fracture network in deep coalbed methane (CBM) reservoirs, which is the directional fracturing by slotted...
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Characteristics of middle-high-rank coal reservoirs and prospects for CBM exploration and development in western Guizhou, China
June 2024
Western Guizhou is a favorable region for coalbed methane (CBM) exploration and development in Guizhou Province. Affected by complex geological conditions, the heterogeneity of middle-high rank coal...
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Measures and results of prevention and control on casing deformation and frac-hit in deep shale gas wells in southern Sichuan Basin
June 2024
Casing deformation and frac-hit pose significant challenges to the development of deep shale gas in southern Sichuan Basin. By analyzing the mechanism and main control factors of casing deformation...
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The response characteristics and damage effects of large LNG storage tanks subject to the coupled effects of explosion shock waves and fire
June 2024
As the demand and import of liquefied natural gas (LNG) increase, large LNG receiving stations are being constructed. LNG leakage can lead to fire or explosion accidents. The simultaneous occurrence...
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The relationship between the time-varying law of the hydrostatic pressureof cement slurry and the early hydration process
June 2024
Annular channeling has seriously troubled deep oil and gas exploitation, and the reduction of hydrostatic pressure of cement slurry in the waiting stage is considered one of the main causes of early...
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