Microscopic wettability of medium rank coals involved pore features and functional groups
August 2022
Wettability affects the immiscible flow process of the gas-water phases in coalbed methane reservoirs, which has an important effect on coalbed methane production. The sessile drop method, infrared...
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Lithofacies types, reservoir characteristics and silica origin of marine shales: A case study of the Wufeng formation–Longmaxi Formation in the Luzhou area, southern Sichuan Basin
August 2022
Shale, which is a fine-grained sedimentary rock, differs in reservoir quality (RQ) and completion quality (CQ) as the result of variations in its mineral and organic-matter compositions. The RQ and...
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Review of CO2 sequestration mechanism in saline aquifers
August 2022
The concentration of CO2 in the global atmosphere, which is increasingly annually with continued industrial development, affects both the global climate and the ecological environment. To control the...
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Key technologies and progress of enhanced gas recovery in water-bearing carbonate gas reservoirs
August 2022
Global oil and gas consumption continues to rise and new strategies are required to meet the growing demand. Carbonate gas reservoirs are an important natural gas resource that are often accompanied...
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A novel multi-path sand-control screen and its application in gravel packing of deepwater horizontal gas wells
August 2022
Gravel packing is a promising sand control method for natural gas wells in deepwater environments. However, premature screenout, wellbore shrinkage, and packer installationlimit gravel packing efficiency...
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Pore characterization of unconventional reservoirs
August 2022
This study proposes an image-based idea for analyzing the complex geometric characteristics of reservoir spaces using various change curves of the pore geometric attributes to subdivide and evaluate...
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Parametric effects on fracture geometries from multi-fracture propagation emanating from neighbouring wellbores in quasi-brittle rocks
August 2022
An integrated approach is presented using field data input from measured geological information into numerical simulation for understanding effects of induced stress on geometries of multiple fracture...
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Effect of sandstone and mudstone thickness on artificial fracturing for hydrocarbon extraction from low-permeability reservoirs
August 2022
Hydraulic fracturing of low-permeability continental reservoirs that possess argillaceous interlayers between single sand bodies is poorly understood. In this study, the delta-front-facies, low-permeability...
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Effect of magnetic field on gas hydrate formation
June 2022
One of the most important issues related to natural gas hydrate which discussed in both terms of problems and opportunities is considering the volume of natural gas as hydrate or blockage the pipelines....
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Surrogate-assisted hydraulic fracture optimization workflow with applications for shale gas reservoir development: a comparative study of machine learning models
June 2022
Unconventional reservoirs have become the main alternative for increasing oil and gas reserves around the world. Owing to their ultralow permeability properties and special pore structure, hydraulic...
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Investigation on the influences of gravel characteristics on the hydraulic fracture propagation in the conglomerate reservoirs
June 2022
To explore the influences of gravel characteristics on hydraulic fracture propagation in conglomerate formations, the real rock fracture process analysis software was used under specific stress conditions:...
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Thermophysical properties of natural gas hydrates: A review
June 2022
As a promising new energy source, natural gas hydrates (NGHs) have attracted wide attention. The thermophysical properties of NGHs are of great significance to their exploitation. This work summarizes...
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Research and test for shut-in after fracturing of volume fracturing technology in Sulige low pressure tight gas
June 2022
Shut-in after fracturing has become an important supporting technology for volume fracturing in unconventional oil and gas wells, which is helpful for gas and water imbibition replacement to increase...
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Differences of fracture propagation behavior for two typical fractured formations
June 2022
Hydraulic fracturing is an important stimulation measure for the development of coalbed methane and shale gas. At present, the fracture initiation and propagation mechanism in coal and shale formations...
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Factors influencing the horizontal inter-well interference in tight gas reservoirs
June 2022
With the continuous shortening of horizontal well clusters and the increase in the single-stage fracturing scale, the inter-well interference phenomenon has increased. Moderate inter-well interference...
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Optimization and field application of reservoir stimulation of the Sinian Deng 4 member in the Sichuan Basin
June 2022
The main zone of production of Sinian gas reservoirs in the Sichuan Basin (China) is the Deng 4 member of the Gaoshiti–Moxi structure. In the Deng 4 member, the rock type is mostly dolomite, and the...
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HSS anions reduction combined with the analytical test of aqueous MDEA in South Pars gas complex
June 2022
Heat stable salts (HSS) form in amine systems as a result of the reaction products of the amine and acidic compounds stronger than H2S and CO2 in the inlet stream to the gas treating unit (GTU). These...
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Erosion hot spots of drain valve under higher particle flow rates
June 2022
Drain valves mounted onto the blow-off pipelines of natural gas gathering plants are often used to discharge deposited particles in separators. Particle flows (greater than 0.01 kg/s) always lead to...
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Shale gas exploration and development in the Sichuan Basin: Progress, challenge and countermeasures
April 2022
China's shale gas production in 2020 exceeds 200 × 108 m³, which creates a miracle in the history of natural gas development in China. The Sichuan Basin has already been and will be the main battlefield...
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Review on the development of China's natural gas industry in the background of “carbon neutrality"
April 2022
At the 75th UN General Assembly, the Chinese government declared to strive to reach peak carbon dioxide emission by 2030 and achieve “carbon neutrality” by 2060. The establishment of this goal not only...
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Progress and prospect of CNOOC's oil and gas well drilling and completion technologies
April 2022
Offshore oil and gas production has become an important growth pole to ensure national energy security. However, China's offshore oil and gas production is lack of key core technologies and weak in...
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Development of natural gas industry in China: Review and prospect
April 2022
In order to better promote the sustainable, effective and rapid development of natural gas business and the on-schedule realization of “carbon peak and carbon neutrality” goal, this paper summarizes...
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Deep and ultra-deep oil and gas well drilling technologies: Progress and prospect
April 2022
In the period of “13th Five-Year Plan”, domestic deep and ultra-deep oil/gas well drilling technologies were developed quickly and a great number of technological achievements were obtained by means...
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Natural gas exploration progress of sinopec during the 13th Five-Year Plan and prospect forecast during the 14th Five-Year Plan
April 2022
Since the 13th Five-Year Plan, Sinopec has been thoroughly carrying out the new energy security strategy of “four revolutions and one cooperation” and the spirit of the important instruction of “powerful...
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Natural gas development prospect in Changqing gas province of the Ordos Basin
April 2022
At present, natural gas accounts for a low proportion in China's primary energy consumption structure and is highly dependent on foreign sources. Changqing gas province of the Ordos Basin where PetroChina...
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