The extending length calculation of hydraulic drive non-metallic completion screen pipe running into ultra-short radius horizontal well
2022
Focusing on the extending length restriction of the completion screen pipe resistance running into ultra-short radius horizontal well, this paper proposed technology of hydraulic drive completion tubular...
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Sedimentary characteristics and main controlling factors of the Middle-Upper Permian and Middle-Upper Triassic around Bogda Mountain of Xinjiang, NW China
2022
Based on field geological survey, interpretation of seismic data and analysis of drilling and logging data, the evolution of geological structures, stratigraphic sedimentary filling sequence and sedimentary...
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Major controlling factors and hydrocarbon accumulation models of large-scale lithologic reservoirs in shallow strata around the Bozhong sag, Bohai Bay Basin, China
2022
Based on the practice of oil and gas exploration and the analysis of shallow lithologic reservoirs, combined with the allocation relationship and enrichment law of oil and gas accumulation factors,...
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Thin-interbedded reservoirs prediction based on seismic sedimentology
2022
Interference of thin-interbedded layers in seismic reflections has great negative impact on thin-interbedded reservoirs prediction. To deal with this, two novel methods are proposed that can predict...
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The mechanism of hydraulic fracturing assisted oil displacement to enhance oil recovery in low and medium permeability reservoirs
2022
Aiming at the technology of hydraulic fracturing assisted oil displacement which combines hydraulic fracturing, seepage and oil displacement, an experimental system of energy storage and flowback in...
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Intelligent production optimization method for a low pressure and low productivity shale gas well
2022
Shale gas wells frequently suffer from liquid loading and insufficient formation pressure in the late stage of production. To address this issue, an intelligent production optimization method for low...
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Characteristics and development model of karst reservoirs in the fourth member of Sinian Dengying Formation in central Sichuan Basin, SW China
2022
The reservoir space, types and distribution characteristics of karst carbonate gas reservoirs in the fourth member of Sinian Dengying Formation (Deng 4 Member) in central Sichuan Basin are analyzed...
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Fluid evolution and hydrocarbon accumulation model of ultra-deep gas reservoirs in Permian Qixia Formation of northwest Sichuan Basin, SW China
2022
The fluid evolution and reservoir formation model of the ultra-deep gas reservoirs in the Permian Qixia Formation of the northwestern Sichuan Basin are investigated by using thin section, cathodoluminescence,...
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Mechanical property design method of cement sheath in a horizontal shale oil well under fracturing conditions
2022
Based on the elastoplastic model of cement sheath considering the influence of three-dimensional principal stress and the stress field model of interface crack, a mechanical performance design method...
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Effects of trapping number on biopolymer flooding recovery of carbonate reservoirs
2022
The effects of trapping number on enhanced oil recovery by schizophyllan biopolymer flooding in carbonate reservoirs were investigated by running several 1D simulations using measured reservoir rock...
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Oxidization characteristics and thermal miscible flooding of high pressure air injection in light oil reservoirs
2022
Physical modeling, numerical simulation and field case analysis were carried out to find out the subsurface thermal oxidation state, thermal oxidation front characteristics and production dynamic characteristics...
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Fault reactivation in No.4 structural zone and its control on oil and gas accumulation in Nanpu sag, Bohai Bay Basin, China
2022
Based on seismic and drilling data, the reactivation mechanism of the pre-existing basement F4 strike-slip fault in Nanpu sag and its controlling effect on hydrocarbon accumulation difference are systematically...
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Sedimentary filling characteristics and controlling factors of lacustrine microbial carbonates sequence in the Santos Basin, Brazil
2022
Based on comprehensive analysis of seismic, logging, core, thin section data, and stable isotopic compositions of carbon and oxygen, the sedimentary filling characteristics of the Lower Cretaceous Barra...
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“Second quantitative characterization” and its application in fractured-vuggy carbonate reservoirs
2022
The Ordovician fracture-vug carbonate reservoirs of Tarim Basin, are featured by developed vugs, caves and fractures. The strong heterogeneity results in huge uncertainty when these reservoirs are quantitatively...
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Enrichment characteristics and exploration directions of deep shale gas of Ordovician–Silurian in the Sichuan Basin and its surrounding areas, China
2022
The enrichment characteristics of deep shale gas in the Ordovician Wufeng–Silurian Longmaxi formations in the Sichuan Basin and its surrounding areas are investigated through experiments under high...
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Calculation and application of partition coefficients of light hydrocarbons in oil-based mud system
2022
To find out the relationship between the oil-based mud, the formation fluid and the extracted gas, we use a thermodynamic approach based on static headspace gas chromatography technique to calculate...
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Progress and prospects of carbon dioxide capture, EOR-utilization and storage industrialization
2022
Carbon dioxide capture, EOR-utilization and storage (CCUS-EOR) are the most practical and feasible large-scale carbon reduction technologies, and also the key technologies to greatly improve the recovery...
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Detached eddy simulation on the structure of swirling jet flow field
2022
The improved delayed detached eddy simulation method with shear stress transport model was used to analyze the evolution of vortex structure, velocity and pressure fields of swirling jet. The influence...
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Dolomitization evolution and its effects on hydrocarbon reservoir formation from penecontemporaneous to deep burial environment
2022
Aiming at the scientific problem that only part of dolomite acts as dolomite reservoir, this paper takes the multiple dolomite-bearing formations in the Tarim and Ordos basins, NW China and Sichuan...
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Control of paleogeographic pattern on sedimentary differentiation of evaporite-carbonate symbiotic system: A case study of the sixth sub-member of Ordovician Majiagou Formation M5 Member in central-eastern Ordos Basin, NW China
2022
The relationship between paleogeographic pattern and sedimentary differentiation of evaporite-carbonate symbiotic system is examined based on logging, core and thin section data, by taking the sixth...
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Shut-in time optimization after fracturing in shale oil reservoirs
June 2022
A multi-process (fracturing, shut-in and production) multi-phase flow model was derived considering the osmotic pressure, membrane effect, elastic energy and capillary force, to determine the optimal...
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Construction of well logging knowledge graph and intelligent identification method of hydrocarbon-bearing formation
June 2022
Based on the well logging knowledge graph of hydrocarbon-bearing formation (HBF), a Knowledge-Powered Neural Network Formation Evaluation model (KPNFE) has been proposed. It has the following functions:...
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New understandings on gas accumulation and major exploration breakthroughs in subsalt Ma 4 Member of Ordovician Majiagou Formation, Ordos Basin, NW China
June 2022
Geological conditions and main controlling factors of gas accumulation in subsalt Ma 4 Member of Ordovician Majiagou Formation are examined based on large amounts of drilling, logging and seismic data....
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Formation mechanisms, potentials and exploration practices of large lithologic gas reservoirs in and around an intracratonic rift: Taking the Sinian—Cambrian of Sichuan Basin as an example
June 2022
By examining structures, sediments, reservoirs and accumulation assemblages in the Deyang—Anyue rift and its surrounding area, four new understandings are obtained. First, during the initiation period...
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Structural characteristics and implications on oil/gas accumulation in north segment of the Longmenshan piedmont, northwestern Sichuan Basin, SW China
June 2022
By integrating surface geology, seismic data, resistivity sections, and drilling data, the structural deformation characteristics of the frontier fault of thrust nappes were delineated in detail. The...
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