Quality evaluation of glutenite reservoirs of intergranular-secondary dissolution pore type using a quantitative method

Glutenite(coarse-grained clastic)reservoirs of intergranularesecondary dissolution pore type are dominated by residual intergranular pores and secondary dissolution pores,and characterized by low porosity,low permeability,strong heterogeneity,and highly variable physical properties.It is difficult to conduct a quantitative quality assessment of these reservoirs while their primary control factors remain unclear.In this paper,experimental core data and drilling,logging and seismic data are used to assess the effect of sedimentary facies on reservoir quality.Favorable sedimentary facies zones are identified by analyzing the characteristics of glutenite reservoirs,which includes investigating rock components and their effects on reservoir quality.Argillaceous matrix content and rigid particle content are identified as the primary control factors for these reservoirs.Logging curves sensitive to reservoir quality are selected and examined to continuously characterize the physical parameters of the reservoirs.It establishes a calculation model of reservoir assessment parameters through multivariate regression and determines the quantitative assessment parameter Fr.The quality of the glutenite reservoirs is defined using conventional logging curves.This study also predicts the plane distribution of high-quality reservoirs through geostatistical inversion of the reservoir assessment parameters based on conventional wave impedance inversion,thus providing insight and guidance for quantitative assessment and quality prediction of glutenite reservoirs of the intergranular-secondary dissolution pore type.The application of this method to well deployment based on qualitative evaluation of the glutenite reservoirs in oilfields yielded favorable results.

磷掺杂碳微球封装双金属磷化物在钠离子电池和电催化析氢中的应用（英文）

过渡金属磷化物由于其独特的物理化学特性,在钠离子电池和电催化析氢反应领域被广泛研究.然而,过渡金属磷化物存在严重团聚和动力学迟缓等问题.本研究将双金属磷化物(Ni2P/Zn P4)嵌入到P掺杂的碳微球中,得到的纳米材料具有结构稳定、电荷转移快和活性位点丰富等优势.结果表明,结构优化的Ni2P/Zn P4复合材料作为钠离子电池负极材料具有良好的电化学性能,包括高比容量、循环稳定和倍率性能佳等.同时, Ni2P/Zn P4复合材料也表现出良好的电催化析氢性能,其过电势为62 mV, Tafel斜率为53 m V dec^-1,且稳定性良好.

Fabrication and luminescence of KGdF_4:Yb^(3+)/Er^(3+) nanoplates and their improving performance for polymer solar cells

Solar energy remains the most abundant renewable energy resource available to us[1].Continuous efforts have been invested to enhance the conversion of light to electricity by the diverse range of applications[2].Especially,polymer solar cells(PSCs)have reminded extensive attention own to flexibility,light-weight

Advances in graphene oxide membranes for water treatment

Graphene oxide(GO),a derivative of graphene,is a novel carbon material that has attracted a lot of attention in the field of membrane materials as its ability to achieve layer-by-layer stacking and the formation of nanochannels between the lamellae makes it excellent for selective separation of substances.In this paper,the separation mechanism of the GO membrane is summarized.According to the different separation substances,the separation mechanism of graphene oxide membrane is reviewed from two aspects of metal ions and organic pollutants.Next,the preparation methods of graphene oxide membranes is introduced,such as spin-coating,vacuum filtration,dip-coating,spraying,and layer-by-layer self-assembly,followed by a review on the structural regulation of GO.Finally,this paper concludes with an overview of the potential development prospects and challenges of GO membranes.

Embedding copper nanoparticle-anchored conductive nano-blocks in polyelectrolyte

Conductive carbon nanotubes(CNTs) or alternatively polyaniline(PANI) nano-blocks was introduced into aqueous solutions of polyvinyl alcohol(PVA) and copper(Ⅱ) salt,to assist the reduction of copper(Ⅱ) ions and the anchoring of the resulting copper nanoparticles onto the conductive blocks.The mixture solutions of nano-blocks,copper(Ⅱ) salts and PVA were spin-coated onto the cathode surface,forming swollen cathode films(SCFs).The copper(Ⅱ) ions in the film assembled onto the surfaces of the conductive blocks and were then reduced under an appropriate voltage.It is important that the copper nanoparticles grew only on the surfaces of the conductive blocks.PVA which acted as the matrix of the composites played a role in stabilizing the resulting copper nanoparticles.Morphologies of these polymeric composite films were studied by various characterization methods.Moreover,the mechanism of migration of copper(Ⅱ)ions,the formation of these polymeric composites,and the overall procedure were investigated in detail.

Highly sensitive color fine-tuning of diblock copolymeric nano-aggregates with tri-metallic cations,Eu(Ⅲ),Tb(Ⅲ),and Zn(Ⅱ),for flexible photoluminescence films(FPFs)

Luminescence materials have shown promise as display apparatus and lighting devices.The particularly interesting systems are photoluminescence materials that are capable of reversible colors emitting repeatedly on exposure to light.Here we report a series of color tunable flexible and transparent photoluminescence films consisting of multi-metals(Eu^(3+),Tb^(3+)and Zn^(3+))induced polymer aggregates(MIPAs)which are distributed uniformly in the polyacrylonitrile(PAN)films without agglomeration.MIPAs have a unique spherical structure due to the self-assembly of polystyrene-block-polyacrylic acid(PS-b-PAA)induced by metal ions.Notably,when applied in photoluminescence devices,these photoluminescence films exhibit not only red,green,blue colors(RGB)light,but also other tuned various color light covering the whole visible range upon excitation of 345 nm through adjusting the relative ratios of metal complexes.As the most important key point,non-conductive polymers can be used in photoluminescence devices as host medium,which is not realized in electroluminescent devices.Thus,the flexible photoluminescence films(FPFs)innovated herein exhibit the great potential to apply for flexible light-color and light-energy transformation devices.