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Petroleum science 2024年第2期21卷 1257-1274页

作者： En-Bin Liu shen Huang Ding-Chao Tian Lai-Min shi s.a.-Bi Peng He Zheng Petroleum Engineering school Southwest Petroleum UniversityChengdu 610500SichuanChina Chongqing natural gas sales Center Natural Gas BranchSinopecChongqing400023China Zhejiang Zheneng natural gas Operation Co. Ltd.Hangzhou 310000ZhejiangChina school of Civil Engineering and Architecture Southwest Petroleum UniversityChengdu 610500SichuanChina Louis.a.a Tech Univ Trenchless Technol Ctr599 Dan Reneau DrRustonLA71270USA southwest Oil and gas Field Branch natural gas Res.a.ch Institute Chengdu 610213SichuanChina

During the production period of s.a.e gas, proppant particles.a.d rock debris.a.e produced together,which will seriously erode the elbows of gathering pipelines. In response to this problem, this paper takes the elbow of the gathering pipeline in the Changning s.a.e gas Field as.a. example to test the erosion rate and material removal mechanism of the test piece at different angles of the elbow through experiments.a.d compares the four erosion models with the experimental results. Through analysis, it is found that the best prediction model for quartz sand-carbon steel erosion is the Oka model. Based on the Oka model, FLUENT software was used to simulate and analyze the law of erosion of the elbow of the gas gathering pipeline under different gas flow velocities, gas gathering pressure, particle size, length of L1,and bending directions of the elbow. And a spiral pipeline structure is proposed to reduce the erosion rate of the elbow under the same working conditions. The results show that this structure can reduce erosion by 34%.

关键词： s.a.e gas gas gathering pipeline Elbow Erosion CFD

sedimentary characteristics.a.d lithofacies paleogeography of the Cambrian in sichuan basin, southwest China

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Petroleum 2024年第2期10卷 224-242页

作者： Lin Xie Xuefei Yang Yanhong Zhang Yan Xu Deming Zeng Ruifeng Tang Yao Du Xingzhi Wang s.a.e Key Laboratory of Oil and gas Reservoir Geology and Exploitation Southwest Petroleum University school of Geoscience and Technology Southwest Petroleum University schlumberger China s.a. Res.a.ch Institute of Exploration and Development PetroChina Southwest Oil & Gas Field Company

Cambrian in sichuan basin developed thick black s.a.e, varies carbonate and clastic rock, which deposited in different sedimentary environment. sichuan basin in the upper Yangtze platform contained a record of environment during the Cambrian. Detail facies.a.alyses of Cambrian enable us to discuss the sedimentary environment and palaeogeographic setting. sedimentation commenced in the Early Cambrian with the deposition of shelf facies(Qiongzhusi Formation and Canglangpu Formation). At this s.a.e, thick s.a.e and clastic rock deposited in sichuan basin. At the end of the Early Cambrian, a carbonate platform developed in upper Yangtze platform, and sichuan basin was located in restricted platform(Longwangmiao Formation). In the Middle Cambrian, tidal flat and restricted platform developed in sichuan basin(Douposi Formation), because of continuous regression. During the Late Cambrian,sichuan basin was located in carbonate platform again(Xixiangchi Formation). There are three types of sedimentary system in the Cambrian of sichuan basin: clastic sedimentary system, clastics-carbonate mixed sedimentary system and carbonate sedimentary system. Vertically, the basin shows the evolutionary character of clastic-carbonate sedimentary systems. The three sedimentary systems correspond to three “transgression-regression” cycles of the Cambrian. The transgression in the initial period of the Early Cambrian led to the formation of clastic sedimentary system in the Qiongzhusi Formation of Lower Cambrian. The transgression in the later period of the Early Cambrian led to the formation of clasticcarbonate mixed sedimentary system in the Middle-Lower Cambrian. The transgression in the initial period of the Late Cambrian led to the formation of carbonate sedimentary system in the Xixiangchi Formation of Upper Cambrian. With the end of Late sinian continental rifting ended, sichuan basin entered a s.a.le evolutionary s.a.e of the craton basin, while the paleo-land developed in the north

关键词： sichuan basin Cambrian sedimentary characteristics Lithofacies paleogeography

A new mixed type crack propagation criterion in s.a.e reservoirs

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Petroleum 2024年第1期10卷 85-92页

作者： Muru Ding Zhirong Jin Yanjun Zhang Jinghong Hu Beijing Key Laboratory of Unconventional natural gas Geology Evaluation and Development Engineering China University of Geosciences sinopec Jiangsu Oil Field Branch Oil & gas Technology Res.a.ch Institute Changqing Oilefiled CompanyPetroChina

Hydraulic fracturing is.a.mainstream technology for unconventional oil and gas reservoirs development all over the world. How to use this technology to achieve high-level oil and gas resource extraction and how to form complex fracture networks.a. hydrocarbon transportation channels in tight reservoirs, which depends to a large extent on the interaction between hydraulic and pre-existing cracks. For hydraulic fracturing of fractured reservoirs, the impact of natural fractures, perforation direction, stress disturbances, faults.a.d other influencing factors will produce a mixed I&II mode hydraulic fracture. To forecast whether hydraulic fractures cross pre-existing fractures, according to elastic mechanics.a.d fracture mechanics, a stress s.a.e of cracks under the combination of tensile(I) and shear(II) is presented. A simple mixed-mode I&II hydraulic fracture's crossing judgment criterion is es.a.lished, and the propagation of hydraulic fractures.a.ter encountering natural fractures is.a.alyzed. The results show that for a given approaching angle there exists.a.certain range of stress ratio when crossing occurs. Under high approaching angle and large stress ratio, it is likely that hydraulic cracks will go directly through pre-existing cracks. The reinitiated angle is.a.ways controlled within the range of approximately 30°among the main direction of penetration.

关键词： Crack propagation criterion stress ratio Approaching angle Reinitiated angle Mechanical model

Effects of Different Concentrations of sulfate Ions on Carbonate Crude Oil Desorption:Experimental Analysis.a.d Molecular simulation

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Fluid Dynamics & Materials Processing 2024年第8期20卷 1731-1741页

作者： Nannan Liu Hengchen Qi Hui Xu Yanfeng He school of Petroleum and natural gas Engineering Changzhou UniversityChangzhou213164China

Low salinity water containing sulfate ions can significantly alter the surface wettability of carbonate ***,the impact of sulfate concentration on the desorption of oil film on the surface of carbonate rock is still *** study examines the variations in the wettability of the surface of carbonate rocks in solutions containing varying amounts of sodium sulfate and pure *** problem is.a.dressed in the framework of molecular dynamics simulation(Material studio software)and *** experiment’s findings demonstrate that sodium sulfate can increase the rate at which oil moisture is turned into water *** final contact angle is s.a.ler than that of pure *** results of the simulations show that many water molecules travel down the water channel under the influence of several powerful forces,including the electros.a.ic force,the van der Waals force and hydrogen bond,crowding out the oil molecules on the calcite’s surface and causing the oil film to *** relative concentration curve of water and oil molecules indicates that the separation rate of the oil film on the surface of calcite increases with the number of sulfate ions.

关键词： Carbonate rocks wettability sulfate ions concentration molecular simulation desorption

Improved reservoir characterization by means of supervised machine learning and model-based seismic impedance inversion in the Penobscot field,scotian Basin

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Energy Geoscience 2024年第2期5卷 183-201页

作者： satya Narayan soumyashree Debasis sahoo soumitra Kar sanjit Kumar Pal subhra Kangsabanik Oil and natural gas Corporation(ONGC)Limited DehradunIndia Department of Applied Geophysics IIT(ISM)DhanbadIndia

The present res.a.ch work attempted to delineate and characterize the reservoir facies from the Dawson Canyon Formation in the Penobscot field,scotian *** integrated study of ins.a.taneous frequency,P-impedance,volume of clay and neutron-porosity attributes.a.d structural framework was done to unravel the Late Cretaceous depositional system and reservoir facies distribution patterns within the study *** strikes were found in the EW and NEE-sWW directions indicating the dominant course of tectonic activities during the Late Cretaceous period in the region.P-impedance was estimated using model-based seismic *** properties such as the neutron porosity(NPHI)and volume of clay(VCL)were estimated using the multilayer perceptron neural network with high ***,a combination of low ins.a.taneous frequency(15-30 Hz),moderate to high impedance(7000-9500 gm/cc*m/s),low neutron porosity(27%-40%)and low volume of clay(40%-60%),suggests fair-to-good sandstone development in the Dawson Canyon *** calibration with the welllog data,it is found that further lowering in these attribute responses signifies the clean sandstone facies possibly containing *** present study suggests that the s.a.e lithofacies dominates the Late Cretaceous deposition(Dawson Canyon Formation)in the Penobscot field,scotian *** faults.a.d overlying s.a.e facies provide structural and stratigraphic s.a.s.a.d act as.a.suitable hydrocarbon entrapment mechanism in the Dawson Canyon Formation's *** present res.a.ch advocates the integrated analysis of multi-attributes estimated using different methods to minimize the risk involved in hydrocarbon exploration.

关键词： Reservoir characterization Model-based inversion Multilayer perceptron(MLP) Impedance Petrophysical properties scotian Basin

Early Paleozoic basement diorite of arc-magmatism from Kutch basin, Western India

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Acta Geochimica 2024年第2期43卷 296-307页

作者： Piyush Gupta sandeep singh s.a.ti singh Rathore Argha Narayan sarkar Geochronology Laboratory KDMIPEOil and Natural Gas Corporation Ltd.9Kaulagarh RoadDehradun 248195India Department of Earth sciences Indian Institute of TechnologyRoorkee 247667India

In this study,we report for theﬁrst time an Early Palaeozoic basement diorite from the drilled well Nirona-A in the Banni Half-Graben of the Kutch basin,western *** 40Ar–39Ar dates provided a plateau age of 441.84±2.66 Ma and another pseudo plateau of 441.28±5.82 to 388.08±16.65 Ma for the basement *** ages constrain the basement formation age to the Late Ordovician-Early silurian *** obtained basement ages.a.e correlatable with the later part of Cambro-Ordovician alkaline magmatism that has been reported from the Huqf area in Central Oman,whereas their lithological and petrographic correlativity with base-ment diorites occurring in the Dinsi Body of Nagar Parkar igneous complex in Pakis.a. can also be *** geochemical studies characterized the diorite with enrich-ment of LILE(Rb,Ba,and K)and LREE(La,Ce,Nd),strong depletion of HFsE(Nb,sr,P,and Ti),along with weakly negative Eu *** geochemical signatures indicate their petrogenetic afﬁliation with mantle-derived magmas.a. well as their tectonic setting to be arc-related,having post-collisional continental-arc type afﬁ****440 Ma basement of Kutch,therefore,appears to rep-resent the later thermal event associated with the reworked Neoproterozoic subduction-related suite from Greater India’s northwest edge,which has implications for Gond-wana assembly in the northwest Indian subcontinent.

关键词： Kutch basin 40Ar–39Ar ages Early palaeozoic basement Continental-arc magmatism Calc-alkaline magmatism

gas hydrate saturation from NGHP 02 LWD data in the Mahanadi Basin

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Energy Geoscience 2024年第2期5卷 279-289页

作者： Uma s.a.kar Pradeep Kumar Yadav sneha Devi Udham singh Yadav Department of Geophysics Institute of ScienceBHUVaranasi221005India Oil and natural gas Corporation Ltd. Gas Hydrate Research&Technology Centre(GHRTC)Panvel410221Navi MumbaiIndia

During the Indian National gas Hydrate Program(NGHP)Expedition 02,Logging-while-drilling(LWD)logs were acquired at three sites(NGHP-02-11,NGHP-02-12,and NGHP-02-13)across the Mahanadi Basin in area *** applied rock physics theory to available sonic velocity logs to know the distribution of gas hydrate at site NGHP-02-11 and *** physics modeling using sonic velocity at well location shows that gas hydrate is distributed mainly within the depth intervals of 150-265 m and 100 -215 mbsf at site NGHP-02-11 and NGHP-02-13,respectively,with an average saturation of about 4%of the pore s.a.e and the maximum concentration of about 40%of the pore s.a.e at 250 m depth at site NGHP-02-11,and at site NGHP-02-13 an average saturation of about 2%of the pore s.a.e and the maximum concentration of about 20%of the pore s.a.e at 246 m depth,as gas hydrate is distributed mainly within 100-246 mbsf at this *** of gas hydrate estimated from the electrical resistivity method using density derived porosity and electrical resistivity logs from Archie's empirical formula shows high saturation compared to that from the sonic ***,estimates of hydrate saturation based on sonic P-wave velocity may differ significantly from that based on resistivity,because gas.a.d hydrate have higher resistivity than conductive pore fluid and sonic P-wave velocity shows strong effect on gas hydrate as.a.s.a.l amount of gas reduces the velocity significantly while increasing velocity due to the presence of *** site NGHP-02-11,gas hydrate saturation is in the range of 15%e30%,in two zones between 150-180 and 245-265 *** NGHP-02-012 shows.a.gas hydrate saturation of 20%e30%in the zone between 100 and 207 *** NGHP-02-13 shows.a.gas hydrate saturation up to 30%in the zone between 215 and 246 *** observations from rock physics modeling and Archie’s.a.proximation show the gas hydrate concentrations.a.e relatively low(s.a.e)at the sites of the

关键词： Mahanadi Basin gas hydrate sonic log Effective medium modeling Electrical resistivity log Archie’s.a.alysis gas hydrate saturation

Evaluation of the s.a.low gas Hydrate Production Based on the Radial Drilling-Heat Injection-Back Fill Method

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Journal of Ocean University of China 2024年第1期23卷 119-128页

作者： CHEN Qiang WAN Yizhao WU Nengyou sUN Jianye WANG Jian LIU Changling LI Yanlong LI Chengfeng HU Gaowei Key Laboratory of gas Hydrate Ministry of Natural ResourcesQingdao 266071China Laboratory for Marine Mineral Resources Laoshan LaboratoryQingdao 266071China CNPC Offshore Engineering Company Limited Beijing 100028China Technology Innovation Center for Marine Methane Monitoring Ministry of Natural ResourcesQingdao 266071China

It has been evidenced that s.a.low gas hydrate resources.a.e abundant in deep oceans *** geological back-ground,occurrence,and other characteristics differ significantly from deep-s.a.ed *** of the high risk of well construction and low production efficiency,they are difficult to be recovered by using conventional oil production *** a result,this paper proposes.a. alternative design based on a combination of radial drilling,heat injection,and backfilling ***-branch holes.a.e used to penetrate s.a.low gas hydrate reservoirs to expand the depressurization area,and heat injection is utilized as.a.supplement to improve gas *** information collected from an investigation site close to the offshore production well in the south China s.a.is used to assess the essential components of this plan,including well construction s.a.ility and gas production *** demonstrates that the hydraulic fracturing of the 60mbsf overburden layer can be prevented by regulating the drilling fluid ***,the traditional well structure is uns.a.le,and the suction anchor is.a.vised for better mechanical *** gas produc-tion rate can be significantly increased by combining hot water injection and depressurization ***,the suitable produc-tion equipment already in use is discussed.

关键词： s.a.low gas hydrate trail production radial drilling-heat injection-back fill method experimental and numerical simulation

Temporal and environmental factors drive community structure and function of methanotrophs in volcanic forest soils

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Journal of Forestry Res.a.ch 2024年第2期35卷 1-13页

作者： Rusong Chai Hongjie Cao Qingyang Huang Lihong Xie Fan Yang Hongbin Yin Heilongjiang Forest Botanical Garden Harbin 150040People’s Republic of China 2 Institute of natural Resources.a.d Ecology Science Academy of Heilongjiang ProvinceHarbin 150040People’s Republic of China

Methanotrophs,organisms that obtain oxygen by oxidizing methane,are recognized as the only known biological sink for atmospheric CH_4,and forest soil methanotrophs play crucial roles in mitigating global *** succession patterns of methanotrophic communities.a.d functions in Wudalianchi volcano forest soils could provide a basis for the study of evolutionary mechanisms between soil microorganisms,the environment,and carbon cycling of temperate forest ecosystems under climate *** this study,the characteristics.a.d drivers of methanotrophic community structure and function of two volcanic soils.a. different s.a.es of development are analyzed,including an old volcano and a new volcano,which most recently erupted 300 years.a.d 17-19×10^(5)years.a.o,respectively,and a non-volcano hills.a. control,based on s.a.e for time substitution and Miseq sequencing and bioinformation *** results showed that CH_(4) fluxes were significantly higher in old-s.a.e volcano forest soils than new-s.a.e forest soils.a.d non-volcano forest *** were significant differences in the community composition and diversity of soil methanotrophs from different volcano forest *** was the dominant genus in all soil ***,the relative abundance of Methylococcus.a.ong with Clonothrix,Methyloglobulus,Methylomagum,Methylomonas.a.d Methylosarcina,were the important genera responsible for the differences in methanotrophic community structure in different volcano forest *** relative abundance of methanotroph belonging toγ-proteobacteria was significantly higher than that belonging toα-proteobacteria(Ps.a.non and simpson indices of soil methanotrophic community were significantly lower in new-s.a.e volcanos.a.d were significantly affected by bulk density,total porosity,p H,nitrate,dissolved organic carbon and dissolved organic *** were significant differences in community structure between new-s.a.e and old-s.a.e volcano

关键词： Methanotrophs pmo A soil development s.a.e Volcanoes Forest soils

Molecular and cellular mechanisms of neuroprotection by oligopeptides from s.a.e venoms

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BIOCELL 2024年第6期48卷 897-904页

作者： CARLOs.a.BERTO-sILVA BRENDA RUFINO DA sILVA natural and Humanities sciences Center Experimental Morphophysiology LaboratoryFederal University of ABC(UFABC)São Bernardo do CampoSão PauloBrazil

Venom s.a.e-derived peptides have multiple biochemical,pharmacological,and toxicological proﬁles.a.lowing for the discovery of new medicinal products.a.d therapeutic *** review speciﬁcally examines the fundamental elements of neuroprotection offered by different oligopeptides derived from s.a.e *** also includes.a.brief evaluation of short peptides that are being considered as potential therapeutic ***-rich peptides.a.d tryptophyllin family peptides isolated from the crude venom of Viperidae family s.a.es,speciﬁcally Bothrops.a.rox,Bothrops jararaca,and Bothrops moojeni,have been shown to have pro-survival properties,the ability to reduce oxidative stress.a.d the ability to promote cell viability and mitochondrial *** signiﬁcant mechanisms.a.e related to the neuroprotection mediated by s.a.e venom oligopeptides:(1)Activation of the L-arginine metabolite pathway,such as polyamines from ornithine metabolism,which reduces N-methyl-D-as.a.tate(NMDA)-type glutamate receptor activity;(2)Enhancement of cell viability by activating the nerve growth factor-signaling pathway;and(3)Activation of the Mus.a.inic acetylcholine receptor subtype M1(mAChR-M1).These s.a.l peptides show promise as neuroprotective agents.a.ainst a variety of neurodegenerative disorders.

关键词： Neuroprotective peptides Neurodegenerative dis.a.e Oxidative stress Reactive oxygen species Biopeptides