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| 1 | Anatomy and plant affinity of Chuaria显示文摘Chuaria is one of the few globally distributed macrofossil pioneers documented in the Precambrian. It is perhaps the most controversial fossil in term of its affinity despite more than one hundred years of study. Many mutually exclusive affinities have been suggested for this frequently encountered fossil. Although often treated as a multicellular alga, this interpretation remains inconclusive because the lacking unambiguous demonstration of cellular structures. In this paper the cellular details of Chuaria are clearly revealed for the first time. The cell walls in Chuaria suggest that it is a multicellular eukaryotic alga, in agreement with the latest biogeochemical analyses. Different thicknesses of cell walls suggest primary cellular differentiation in this organism. Membrane-like structures within the cells (the first to be reported in Precambrian fossils) imply a eukaryotic nature. This study partially resolves the century-long controversy over the affinity of Chuaria, and makes Chuaria one of the few recognized multicellular eukaryotes before the Neoproterozoic glaciation. | WANG Xin YUAN XunLai ZHOU ChuanMing DU KaiHe GONG Miao | 2011 | Chinese Science Bulletin2011，56，12： | 2 |
| 2 | Research progress and prospect of plugging technologies for fractured formation with severe lost circulation显示文摘By reviewing the mechanisms of drilling fluid lost circulation and its control in fractured formations, the applicability and working mechanisms of different kinds of lost circulation materials in plugging fractured formations have been summarized. Meanwhile, based on the types of lost circulation materials, the advantages, disadvantages, and application effects of corresponding plugging technologies have been analyzed to sort out the key problems existing in the current lost circulation control technologies. On this basis, the development direction of plugging technology for severe loss have been pointed out. It is suggested that that the lost circulation control technology should combine different disciplines such as geology, engineering and materials to realize integration, intelligence and systematization in the future. Five research aspects should be focused on:(1) the study on mechanisms of drilling fluid lost circulation and its control to provide basis for scientific selection of lost circulation material formulas, control methods and processes;(2) the research and development of self-adaptive lost circulation materials to improve the matching relationship between lost control materials and fracture scales;(3) the research and development of lost circulation materials with strong retention and strong filling in three-dimensional fracture space, to enhance the retention and filling capacities of materials in fractures and improve the lost circulation control effect;(4) the research and development of lost circulation materials with high temperature tolerance, to ensure the long-term plugging effect of deep high-temperature formations;(5) the study on digital and intelligent lost circulation control technology, to promote the development of lost circulation control technology to digital and intelligent direction. | SUN Jinsheng BAI Yingrui CHENG Rongchao LYU Kaihe LIU Fan FENG Jie LEI Shaofei ZHANG Jie HAO Huijun | 2021 | Petroleum Exploration and Development2021，48，3： | 2 |
| 3 | Time interval measuring enzyme for resumption of embryonic development in the silkworm,Bombyx moil 显示文摘 | Kaih miao Y | 1995 | Journal of Insect Physiology1995，41，41： | 1 |
| 4 | Morphology of spiroplasmas in the Chincse mitten crab Eriocheir sinensis associated with tremor disease显示文摘 | Wang Wen Chen Jianxiu Du Kaihe | 2004 | J Microbiol2004，155，： | 1 |
| 5 | Presence of PIN factor(s) responsible for the time - interval activation of esterase A4 in the diapause duration timer of Bombyx mori 显示文摘 | Kaih Oda K | 1996 | Sericuhure Science of Japan1996，65，： | 1 |
| 6 | Amino acid sequence of PIN peptides conducting TIME (Time - Interval - Measuring -Esterase) activation for resumption of embryonic development in the silkworm, Bombyx mori 显示文摘 | Isobem Suwan S Kaih | 1995 | Bioorganic & medicinal Chemistry Letters1995，5，23： | 1 |
| 7 | Cooperative secret generation from phase estimation in narrowband fading channels 显示文摘 | Wang Qian Xu Kaihe Ren Kui | 2012 | IEEE Journal on Selected Areas in Communications2012，30，9： | 1 |
| 8 | Cooperative Secret Key Generation from Phase Estimation in Narrowband Fading Channels显示文摘 | Wang Qian Xu Kaihe Ren Kui | | 0，，09： | 1 |
| 9 | Subcellular distribution and toxicity of cadmium in Potamogeton crispus L.显示文摘 | Qinsong Xu Haili Min Sanjuan Cai Yongyang Fu Sha Sha Kaibin Xie Kaihe Du | 2012 | Chemosphere2012，，1： | 1 |
| 10 | Development of key additives for organoclay-free oil-based drilling mud and system performance evaluation显示文摘Traditional oil-based drilling muds(OBMs) have a relatively high solid content, which is detrimental to penetration rate increase and reservoir protection. Aimed at solving this problem, an organoclay-free OBM system was studied, the synthesis methods and functioning mechanism of key additives were introduced, and performance evaluation of the system was performed. The rheology modifier was prepared by reacting a dimer fatty acid with diethanolamine, the primary emulsifier was made by oxidation and addition reaction of fatty acids, the secondary emulsifier was made by amidation of a fatty acid, and finally the fluid loss additive of water-soluble acrylic resin was synthesized by introducing acrylic acid into styrene/butyl acrylate polymerization. The rheology modifier could enhance the attraction between droplets, particles in the emulsion via intermolecular hydrogen bonding and improve the shear stress by forming a three-dimensional network structure in the emulsion. Lab experimental results show that the organoclay-free OBM could tolerate temperatures up to 220 ?C and HTHP filtration is less than 5 m L. Compared with the traditional OBMs, the organoclay-free OBM has low plastic viscosity, high shear stress, high ratio of dynamic shear force to plastic viscosity and high permeability recovery, which are beneficial to penetration rate increase, hole cleaning and reservoir protection. | SUN Jinsheng HUANG Xianbin JIANG Guancheng LYU Kaihe LIU Jingping DAI Zhiwen | 2018 | Petroleum Exploration and Development2018，45，4： | 1 |
| 11 | Mutant MCP-1therapy inhibitstumor angiogenesis and growth of malignant melanoma inmice显示文摘 | Kogam Kaih Egamik | 2008 | Biochem biophys Res Commun2008，365，2： | 1 |
| 12 | Study of polymer humidity sensor array on silicon wafer显示文摘 | Jing Wang Kaihe Shi Lihua Chen Xiaojun Zhang | 2004 | Journal of Materials Science2004，，9： | 1 |
| 13 | Magnetotransport in an impurity-doped few-layer graphene spin valve显示文摘 | Ding Kaihe Zhu Zhengang | | 0，，： | 1 |
| 14 | Fabrication of a Hydrophobic Hierarchical Surface on Shale Using Modified Nano-SiO_(2)for Strengthening the Wellbore Wall in Drilling Engineering显示文摘Wellbore stability is essential for safe and efficient drilling during oil and gas exploration and development.This paper introduces a hydrophobic nano-silica(HNS)for use in strengthening the wellbore wall when using a water-based drilling fluid(WBF).The wellbore-strengthening performance was studied using the linear swelling test,hot-rolling recovery test,and compressive strength test.The mechanism of strengthening the wellbore wall was studied by means of experiments on the zeta potential,particle size,contact angle,and surface tension,and with the use of a scanning electron microscope(SEM).The surface free energy changes of the shale before and after HNS treatment were also calculated using the contact angle method.The experimental results showed that HNS exhibited a good performance in inhibiting shale swelling and dispersion.Compared with the use of water,the use of HNS resulted in a 20%smaller linear swelling height of the bentonite pellets and an 11.53 times higher recovery of water-sensitive shale—a performance that exceeds those of the commonly used shale inhibitors KCl and polyamines.More importantly,the addition of HNS was effective in preventing a decrease in shale strength.According to the mechanism study,the good wellbore-strengthening performance of HNS can be attributed to three aspects.First,the positively charged HNS balances parts of the negative charges of clay by means of electrostatic adsorption,thus inhibiting osmotic hydration.Second,HNS fabricates a lotus-leaf-like surface with a micro-nano hierarchical structure on shale after adsorption,which significantly increases the water contact angle of the shale surface and considerably reduces the surface free energy,thereby inhibiting surface hydration.Third,the decrease in capillary action and the effective plugging of the shale pores reduce the invasion of water and promote wellbore stability.The approach described herein may provide an avenue for inhibiting both the surface hydration and the osmotic hydration of shale. | Xianbin Huang Jinsheng Sun He Li Ren Wang Kaihe Lv Haichao Li | 2022 | Engineering2022，8，4： | 1 |
| 15 | Cooperative secret key generation from phase estimation in narrowband fading channels 显示文摘 | WANG Qian XU Kaihe REN Kui | 2012 | IEEE Journal on Selected Areas in Communications2012，30，9： | 1 |
| 16 | A high-temperature resistant and high-density polymeric saturated brine-based drilling fluid显示文摘Three high-temperature resistant polymeric additives for water-based drilling fluids are designed and developed:weakly cross-linked zwitterionic polymer fluid loss reducer(WCZ),flexible polymer microsphere nano-plugging agent(FPM)and comb-structure polymeric lubricant(CSP).A high-temperature resistant and high-density polymeric saturated brine-based drilling fluid was developed for deep drilling.The WCZ has a good anti-polyelectrolyte effect and exhibits the API fluid loss less than 8 mL after aging in saturated salt environment at 200°C.The FPM can reduce the fluid loss by improving the quality of the mud cake and has a good plugging effect on nano-scale pores/fractures.The CSP,with a weight average molecular weight of 4804,has multiple polar adsorption sites and exhibits excellent lubricating performance under high temperature and high salt conditions.The developed drilling fluid system with a density of 2.0 g/cm^(3)has good rheological properties.It shows a fluid loss less than 15 mL at 200°C and high pressure,a sedimentation factor(SF)smaller than 0.52 after standing at high temperature for 5 d,and a rolling recovery of hydratable drill cuttings similar to oil-based drilling fluid.Besides,it has good plugging and lubricating performance. | HUANG Xianbin SUN Jinsheng LYU Kaihe DONG Xiaodong LIU Fengbao GAO Chongyang | 2023 | Petroleum Exploration and Development2023，50，5： | 0 |
| 17 | Research progress and application prospect of functional adhesive materials in the field of oil and gas drilling and production显示文摘By summarizing the composition,classification,and performance characterization of functional adhesive materials,the adhesion mechanisms of functional adhesive materials,such as adsorption/surface reaction,diffusion,mechanical interlocking,and electrostatic adsorption,are expounded.The research status of these materials in oil and gas drilling and production engineering field such as lost circulation prevention/control,wellbore stabilization,hydraulic fracturing,and profile control and water plugging,and their application challenges and prospects in oil and gas drilling and production are introduced comprehensively.According to the applications of functional adhesive materials in the field of oil and gas drilling and production at this stage,the key research directions of functional adhesive materials in the area of oil and gas drilling and production are proposed:(1)blending and modifying thermoplastic resins or designing curable thermoplastic resins to improve the bonding performance and pressure bearing capacity of adhesive lost circulation materials;(2)introducing low-cost adhesive groups and positive charge structures into polymers to reduce the cost of wellbore strengthening agents and improve their adhesion performance on the wellbore;(3)introducing thermally reversible covalent bond into thermosetting resin to prevent backflow of proppant and improve the compressive strength of adhesive proppant;(4)introducing thermally reversible covalent bonds into thermoplastic polymers to improve the temperature resistance,salt-resistance and water shutoff performance of adhesive water shutoff agents. | SUN Jinsheng LEI Shaofei BAI Yingrui LYU Kaihe CHENG Rongchao HAO Huijun LIU Fan | 2023 | Petroleum Exploration and Development2023，50，1： | 0 |
| 18 | Development and performance evaluation of a high temperature resistant, internal rigid, and external flexible plugging agent for water-based drilling fluids显示文摘During the drilling process for oil and gas production,a larger number of drilling fluids invade the formation,causing severe formation damage and wellbore collapsing,which seriously hinders the efficient production of deep oil and gas.Although several plugging agents have been developed for efficient fracture sealing in recent years,the development of high-performance plugging agents with self-adaptive ability and high-temperature resistance remain a challenge.Herein,we report the synthesis of an internal rigid and external flexible plugging agent PANS by reversed-phase emulsion polymerization with nano-silica as the rigid core and poly(acrylamide-co-N-vinylpyrrolidone)as a flexible shell.The plugging agent has a median particle size of 10.5μm and can self-adapt to seal the microfractures and fractures in the formation,leading to an effective reduction in the filtration loss of bentonite water-based drilling fluid under both low temperature and low pressure(LTLP)and high temperature and high pressure(HTHP)conditions.In addition,compared with the neat nano-silica(500 nm),the sealing efficiency of PANS toward 100–120 mesh sand bed was increased by 71.4%after hot rolling at 180°C. | Zhe Xu Jinsheng Sun Li Li Kaihe Lv Jingping Liu Zhiwen Dai Xianfa Zhang Zonglun Wang | 2023 | Petroleum2023，9，1： | 0 |
| 19 | Pretreatment of highly turbid coal mine drainage by a chemical agent free filtration system显示文摘A filtration system used without chemical agents for the pretreatment of turbid coal mine drainage is described in this paper.The influence of different aperture sizes and different motor speeds was investigated during the study.The experimental results show that for aperture diameters of 0.4,0.6,or 0.8 mm smaller apertures provide more complete filtration.Rotations of 12,20,28,or 40 r/min show that higher speeds give more efficient filtration.Suspended solids decreased in both particle size and concentration after the filtration.The separated slime can be directly reused as a fuel.Efficient filtration pretreatment systems for coal mine drainage were investigated and the economic feasibility is analyzed in this article. | Zhang Chunhui He Xiong Li Kaihe Wu Dongsheng Guo Yanrong Wang Can | 2012 | International Journal of Mining Science and Technology2012，22，5： | 0 |
| 20 | Formation mechanisms of fracture plugging zone and optimization of plugging particles显示文摘As formation mechanisms of plugging zone and criteria for fracture plugging remain unclear,plugging experiments and methods testing granular material mechanical properties are used to study the formation process of the plugging zone in fractured formations,analyze composition and ratios of different sizes of particles in the plugging zone,and reveal the essence and driving energy of the formation and damage of the plugging zone.New criteria for selecting lost circulation materials are proposed.The research results show that the formation of the plugging zone has undergone a process from inertial flow,elastic flow,to quasi-static flow.The plugging zone is composed of fracture mouth plugging particles,bridging particles and filling particles,and the proportion of the three types of particles is an important basis for designing drilling fluid loss control formula.The essence of the construction of the plugging zone is non-equilibrium Jamming phase transition.The response of the plugging zone particle system to pressure is driven by entropy force;the greater the entropy,the more stable the plugging zone.Lost circulation control formula optimized according to the new criteria has better plugging effect than the formula made according to conventional plugging rules and effectively improves the pressure-bearing capacity of the plugging zone.The research results provide a theoretical and technical basis for the lost circulation control of fractured formations. | LEI Shaofei SUN Jinsheng BAI Yingrui LYU Kaihe ZHANG Shupei XU Chengyuan CHENG Rongchao LIU Fan | 2022 | Petroleum Exploration and Development2022，49，3： | 0 |
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