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ISSN: 1995-8226

Countercurrent imbibition in low-permeability porous media: Non-diffusive behavior and implications in tight oil recovery

Countercurrent imbibition is an important mechanism for tight oil recovery, that is, water imbibes spontaneously from the fracture into the porous matrix while oil flows reversely into the fracture....

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Improving the anti-collapse performance of water-based drilling fluids of Xinjiang Oilfield using hydrophobically modified silica nanoparticles with cationic surfactants

Wellbore instability, especially drilling with water-based drilling fluids (WBDFs) in complex shale formations, is a critical challenge for oil and gas development. The purpose of this paper is to study...

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Discovery of a new Proterozoic paleo-reservoir and its oil source in the Jianchang Sag, Yanliao Faulted-Depression Zone, North China

The discovery of many Proterozoic primary oil and gas reservoirs around the world testifies that the Meso-Neoproterozoic petroleum is an energy resources realm worthy of attention. This paper firstly...

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Development of self-generated proppant based on modified low-density and low-viscosity epoxy resin and its evaluation

Hydraulic fracturing is a critical technology for the economic development of unconventional oil and gas reservoirs. The main factor influencing fracture propping and reservoir stimulation effect is...

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A computational method for wide-azimuth 3D dip-angle gathers using Gaussian beam migration

The dip-angle-domain common-image gather (DDCIG) is a key tool to separate the diffraction and reflection imaging results. Reflectors with different spatial geometries produce different responses in...

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The direct synthesis of Ni/SAPO-11 hydroisomerization catalyst via a novel two-step crystallization strategy

The Ni/SAPO-11 catalyst used for n-hexane hydroisomerization was prepared via a novel two-step crystallization strategy. It involves introduction of nickel salt into the pre-crystalized system of SAPO-11...

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Acoustic logging response law in shales based on petrophysical model

Shale acoustic logging response law is complex due to the multiple minerals and pores, which limits the application of acoustic logging in shale reservoir parameter evaluation, therefore clarifying...

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Self-aggregating behavior of poly(4-vinyl pyridine) and the potential in mitigating sand production based on π-π stacking interaction

Unconsolidated sandstone reservoirs are most susceptible to sand production that leads to a dramatic oil production decline. In this study, the poly(4-vinyl pyridine) (P4VP) incorporated with self-aggregating...

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Double network self-healing hydrogel based on hydrophobic association and ionic bond for formation plugging

Self-healing hydrogels have attracted tremendous attention in the field of oil and gas drilling and production engineering because of their excellent self-healing performance after physical damage....

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Two-stage robust optimization of power cost minimization problem in gunbarrel natural gas networks by approximate dynamic programming

In short-term operation of natural gas network, the impact of demand uncertainty is not negligible. To address this issue we propose a two-stage robust model for power cost minimization problem in gunbarrel...

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Performance improvement of Ethylene−Vinyl Acetate Copolymer Pour Point Depressant (EVA PPD) by adding small dosages of Laurylamine (LA)

Lauramine is widely considered to be an asphaltene flocculant, but its effect on the modification of crude oil by PPDs has been little studied. In this paper, the effect of LA dosage on the rheology...

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Vertical grain-size trend of mouth bar in lacustrine fan delta: Flume experiments

Field observational previously indicated a mouth bar of a fan delta could exhibit a fining- or coarsening-upward trend, which bring a new challenge to the identification of mouth bar in subsurface studies...

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The new multistage water adsorption model of Longmaxi Formation shale considering the spatial configuration relationship between organic matter and clay minerals

The water adsorption by shale significantly affects shale gas content and its seepage capacity. However, the mechanism of water adsorption by shale is still unclear due to its strong heterogeneity and...

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An optimization method for shale gas gathering system - Consideration of reliability enhancement under earthquake-related uncertainties

Shale gas gathering systems are of great importance in gas fields for the efficient and reliable transportation of gas. In traditional design methods, pipeline layouts are optimized only from an economic...

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Laboratory to field scale assessment for EOR applicability in tight oil reservoirs

Tight oil reservoirs are contributing a major role to fulfill the overall crude oil needs, especially in the US. However, the dilemma is their ultra-tight permeability and an uneconomically short-lived...

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A mathematical diffusion model of carbon isotopic reversals inside ultra-tight Longmaxi shale matrixes

Developing mathematical models for high Knudsen number (Kn) flow for isotopic gas fractionation in tight sedimentary rocks is still challenging. In this study, carbon isotopic reversals (δ13C1 > δ13C2)...

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Automatic microseismic events detection using morphological multiscale top-hat transformation

The occurrence of microseismic is not random but is related to the physical properties of the underground medium. Due to the low intensity and the influence of noise, microseismic eventually lead to...

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Experimental investigation of tubing collar's influence on hydrodynamic behavior of annular duct flow

Tubing collars’ influence on hydrodynamic behavior of annular duct flow has been investigated using Particle Image Velocity (PIV) technology. PIV has become an efficient method for complex transient...

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Reliability analysis of large-diameter high-grade-steel natural gas pipelines under fault action

There are a lot of researches on qualitative aseismatic measures for buried gas pipeline crossing movable faults. But a few of them are quantitative, especially in the size and shape of the trench....

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Numerical simulation on the multiple planar fracture propagation with perforation plugging in horizontal wells

Intra-stage multi-cluster temporary plugging and diverting fracturing (ITPF) is one of the fastest-growing techniques to obtain uniform reservoir stimulation in shale gas reservoirs. However, propagation...

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Flow-visualization and numerical investigation on the optimum design of cavitating jet nozzle

Cavitating jet is widely used in drilling, rock cutting and ocean resource exploitation because of its strong erosion ability. The analysis of the relationship between the flow characteristics and the...

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Pore and fracture characteristics of Cretaceous tight reservoir and its control effect on hydrocarbon accumulation in the Liuhe Basin

Tight oil and gas in the Cretaceous has been found in the Liuhe Basin, but the rules of tight reservoir and oil and gas accumulation are not clear. This paper discusses the developmental characteristics...

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The anti – Temperature-vibration properties of viscoelastic anticorrosive tape

Viscoelastic anticorrosive tape is extensively used for repairing anticorrosive layers on compressor outlet pipelines in the oil and gas industry. However, there is no relevant research on the coupling...

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Quantitative investigation of nanofluid imbibition in tight oil reservoirs based on NMR technique

Nanofluids have been effective chemical additives for enhanced oil recovery (EOR) in tight oil reservoirs due to their special properties. However, oil imbibition recoveries vary for different nanofluids....

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