检索结果-南通市图书馆

New insights into the deposition of natural gas hydrate on pipeline surfaces:A molecular dynamics simulation study

Petroleum Science 2024年第1期21卷 694-704页

作者： Jun Zhang Hai-Qiang Fu Mu-Zhi Guo Zhao Wang Li-Wen Li Qi Yin You-Guo Yan Wei Wei Wei-Feng Han Jie Zhong School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina Department of Alternative Energy PetroChina Research Institute of Petroleum Exploration&DevelopmentLangfang 065007HebeiChina

natural gas hydrate(NGH)can cause pipeline blockages during the transportation of oil and gas under high pressures and low temperatures.Reducing hydrate adhesion on pipelines is viewed as an efficient way to prevent NGH blockages.Previous studies suggested the water film can greatly increase hydrate adhesion in gas-dominant system.Herein,by performing the molecular dynamics simulations,we find in water-dominant system,the water film plays different roles in hydrate deposition on Fe and its corrosion surfaces.Specifically,due to the strong affinity of water on Fe surface,the deposited hydrate cannot convert the adsorbed water into hydrate,thus,a water film exists.As water affinities decrease(Fe>Fe_(2)O_(3)>FeO>Fe_(3)O_(4)),adsorbed water would convert to amorphous hydrate on Fe_(2)O_(3)and form the ordered hydrate on FeO and Fe_(3)O_(4)after hydrate deposition.While absorbed water film converts to amorphous or to hydrate,the adhesion strength of hydrate continuously increases(Fehydrate prefers to occur at soft region of liquid layer,the process of which becomes harder as liquid layer vanishes.As a result,contrary to gas-dominant system,the water film plays the weakening roles on hydrate adhesion in water-dominant system.Overall,our results can help to better understand the hydrate deposition mechanisms on Fe and its corrosion surfaces and suggest hydrate deposition can be adjusted by changing water affinities on pipeline surfaces.

关键词： Deposition natural gas hydrate Pipelines Water affinity Adhesion strength

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Numerical Investigation of Combined Production of natural gas hydrate and Conventional gas

引用

Fluid Dynamics & Materials Processing 2024年第3期20卷 505-523页

作者： Hongzhi Xu Jian Wang Shuxia Li Fengrui Zhao Chengwen Wang Yang Guo School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China CPOE Research Institute of Engineering Technology Tianjin300451China CNPC Offshore Engineering Company Limited Beijing100028China

natural gas hydrate(NGH)is generally produced and accumulated together with the underlying conventional gas.Therefore,optimizing the production technology of these two gases should be seen as a relevant way to effectively reduce the exploitation cost of the gas hydrate.In this study,three types of models accounting for the coexistence of these gases are considered.Type A considers the upper hydrate-bearing layer(HBL)adjacent to the lower conventional gas layer(CGL);with the Type B a permeable interlayer exists between the upper HBL and the lower CGL;with the type C there is an impermeable interlayer between the upper HBL and the lower CGL.The production performances associated with the above three models are calculated under different conditions,including only a depressurized HBL(only HBL DP);only a depressurized CGL(only CGL DP);and both the HBL and the CGL being depressurized(HBL+CGL DP).The results show that for Type A and Type B coexistence accumulation models,when only HBL or CGL is depressurized,the gas from the other layer will flow into the production layer due to the pressure difference between the two layers.In the coexistence accumulation model of type C,the cumulative gas production is much lower than that of Type A and Type B,regardless of whether only HBL DP,only CGL DP,or HBL+CGL DP are considered.This indicates that the impermeable interlayer restricts the cross-flow of gas between HBL and CGL.For three different coexistence accumulation models,CGL DP has the largest gas-to-water ratio.

关键词： natural gas hydrate conventional gas coexistence accumulation depressurization combined production

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Distribution and resource evaluation of natural gas hydrate in South China sea by combing phase equilibrium mechanism and volumetric method

引用

Petroleum Science 2022年第1期19卷 26-36页

作者： Tong Wang Tao Hu Xiong-Qi Pang Xing-Wen Zhang Xiao-Han Liu Zhi Xu En-Ze Wang Zhuo-Ya Wu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China School of Earth&Space Sciences Peking UniversityBeijing100871China Research Institute of Petroleum Exploration and Development PetroChina Company LimitedBeijing100083China

China Geological Survey conducted the second trial production of natural gas hydrate(NGH)in the Shenhu Area in South China Sea(SCS)from 2019 to 2020.Compared with the first trial production in 2017,the second trial showed significantly increased daily gas production and total gas production,and removed some technical obstacles for large-scale NGH resource developments in the SCS.However,current NGH resource evaluation in the SCS is still at the stage of prospective gas content assessment,which is unable to guide further NGH exploration and development.This study utilized the hydrate phase balance to delineate the NGH distribution range and effective thickness and volumetric method to evaluate NGH resource.Based on the latest exploration and production data from the Shenhu Area,Monte Carlo simulation was performed to calculate the NGH resource amount with different probabilities.By assuming a 50%cumulative probability,the in-situ NGH resources in the SCS was estimated to be11.7×10^(12)m^(3) and the recoverable NGH resources was 2.8×10^(12)m^(3).These results will provide a more reliable resource basis for China to formulate comprehensive development strategies for oil and gas exploration in the SCS.

关键词： South China Sea Oil and gas resource natural gas hydrate In-situ resource Recoverable resources

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of natural gas hydrate resources in the South China Sea using a new genetic analogy method

引用

Petroleum Science 2022年第1期19卷 48-57页

作者： Xiao-Han Liu Tao Hu Xiong-Qi Pang Zhi Xu Tong Wang Xing-Wen Zhang En-Ze Wang Zhuo-Ya Wu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China School of Earth&Space Sciences Peking UniversityBeijing100871China Research Institute of Petroleum Exploration&Development CNPCBeijing100083China

natural gas hydrate(NGH)has attracted much attention as a new alternative energy globally.However,evaluations of global NGH resources in the past few decades have casted a decreasing trend,where the estimate as of today is less than one ten-thousandth of the estimate forty years ago.The NGH researches in China started relatively late,but achievements have been made in the South China Sea(SCS)in the past two decades.Thirty-five studies had been carried out to evaluate NGH resource,and results showed a flat trend,ranging from 60 to 90 billion tons of oil equivalent,which was 2-3 times of the evaluation results of technical recoverable oil and gas resources in the SCS.The big difference is that the previous 35 group of NGH resource evaluations for the SCS only refers to the prospective gas resource with low grade level and high uncertainty,which cannot be used to guide exploration or researches on development strategies.Based on the analogy with the genetic mechanism of conventional oil and gas resources,this study adopts the newly proposed genetic method and geological analogy method to evaluate the NGH resource.Results show that the conventional oil and gas resources are 346.29×10^(8)t,the volume of NGH and free dynamic field are 25.19×10^(4)km^(3) and(2.05-2.48)×10^(6)km^(3),and the total amount of in-situ NGH resources in the SCS is about(4.47-6.02)×10^(12)m^(3).It is considered that the resource of hydrate should not exceed that of conventional oil and gas,so it is 30 times lower than the previous estimate.This study provides a more reliable geological basis for further NGH exploration and development.

关键词： South China Sea natural gas hydrate natural gas hydrate resources Conventional oil and gas resources Genetic method Analogy method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research and application of thermal insulation effect of natural gas hydrate freezing corer based on the wireline-coring principle

引用

Petroleum Science 2022年第3期19卷 1291-1304页

作者： Yun-Qi Hu Jing Xie Shou-Ning Xue Meng Xu Cheng-Hang Fu Hui-Lan He Zhi-Qiang Liu Shao-Ming Ma Si-Qing Sun Chuan-Liu Wang School of Mechanical Engineering Sichuan UniversityChengdu610065China MOE Key Laboratory of Deep Underground Science and Engineering Sichuan UniversityCollege of Water Resource and HydropowerSichuan UniversityChengdu610065China Zhensha Hydropower Construction Management Branch of Guoneng Dadu River Basin Hydropower Development Co.Ltd Leshan614700SichuanChina Jin Shi Drill Tech Co. LtdTangshan063004HebeiChina Xi'an Research Institute China Coal Technology&Engineering Group CorpXi'an710077ShaanxiChina

natural gas hydrate(NGH)holds great promise as a source of clean energy.It is critical for acquiring the largest possible in situ NGH core for NGH eigen features and resource assessment.However,the existing NGH coring technology has limitations,such as temperature increments,limited coring diameters,low coring rates,and complex coring structures.Therefore,this study designs and proposes an NGH freezing coring(NGHFC)method and verifies the freezing and coring capacities of the NGHFC method in laboratories and experimental wells.Results suggest that NGHFC shows good freezing and heat-retention properties.A freezing core heat transfer model is developed.According to the actual air temperature and operating time,the optimum initial temperature of the cold source can be determined using this model.The average coring rate of NGHFC can reach 77.86%.The research results will provide a new idea of coring gas hydrates.

关键词： natural gas hydrate Coring Cold source freezing In situ temperature and pressure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research progress and challenges of natural gas hydrate resource evaluation in the South China Sea

引用

Petroleum Science 2022年第1期19卷 13-25页

作者： Zhi Xu Tao Hu Xiong-Qi Pang En-Ze Wang Xiao-Han Liu Zhuo-Ya Wu Di Chen Chang-Rong Li Xing-Wen Zhang Tong Wang State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China School of Earth&Space Sciences Peking UniversityBeijing100871China Research Institute of Petroleum Exploration&Development CNPCBeijing100083China

As an efficient clean energy,natural gas hydrate(NGH)has become a hot topic in recent researches.Since1990 s,China has made great achievements and progress in NGH exploration in the South China Sea(SCS),including determination of the favorable distribution areas and favorable strata thickness,identification of the dual source for accumulation,evaluation of the prospective gas contents,verification of the widespread existence,and confirmation of the technical recoverability of NGH resources.However,there are three major challenges in the NGH studies.First,all the 24 national key and major projects in the SCS focused on trial production engineering and geological engineering in the past 20 years,while 8 of the 10 international NGH research projects focused on resource potential.Second,resource evaluation methods are outdated and some parameter selection are subjective.Third,the existing resource evaluation results are low-level with a great uncertainty,and cannot be used to guide NGH exploration and production or strategic research.To improve the evaluation of NGH resources in the SCS,future researches should focus on four aspects:(1)improve the research on the criterion of the objective existence of NGH and the method of prediction and evaluation;(2)apply new theories and methods from the global NGH research;(3)boost the research on the difference and correlation of the conditions of hydrocarbon migration and accumulation in different basins;(4)innovate the theory and method of NGH resource potential evaluation.

关键词： South China Sea natural gas hydrate Oil and gas resource evaluation Comprehensive exploration of oil and gas Oil and gas development strategy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental study on solid particle migration and production behaviors during marine natural gas hydrate dissociation by depressurization

引用

Petroleum Science 2023年第6期20卷 3610-3623页

作者： Yan-Long Li Fu-Long Ning Meng Xu Min-Hui Qi Jia-Xin Sun Alireza Nouri De-Li Gao Neng-You Wu Key Laboratory of gas hydrate Ministry of Natural ResourcesQingdao Institute of Marine GeologyQingdao266237ShandongChina Laboratory for Marine Mineral Resources Laoshan LaboratoryQingdao266237ShandongChina Faculty of Engineering China University of Geosciences-WuhanWuhan430074HubeiChina MOE Key Laboratory of Petroleum Engineering China University of PetroleumBeijing102249China School of Mining and Petroleum Engineering University of AlbertaEdmontonABCanada

Sand production is one of the main obstacles restricting gas extraction efficiency and safety from marine natural gas hydrate(NGH)reservoirs.Particle migration within the NGH reservoir dominates sand production behaviors,while their relationships were rarely reported,severely constrains quantitative evaluation of sand production risks.This paper reports the optical observations of solid particle migration and production from micrometer to mesoscopic scales conditioned to gravel packing during depressurization-induced NGH dissociation for the first time.Theoretical evolutionary modes of sand migration are established based on experimental observations,and its implications on field NGH are comprehensively discussed.Five particle migration regimes of local borehole failure,continuous collapse,wormhole expansion,extensive slow deformation,and pore-wall fluidization are proved to occur during depressurization.The types of particle migration regimes and their transmission modes during depressurization are predominantly determined by initial hydrate saturation.In contrast,the depressurization mainly dominates the transmission rate of the particle migration regimes.Furthermore,both the cumulative mass and the medium grain size of the produced sand decrease linearly with increasing initial methane hydrate(MH)saturation.Discontinuous gas bubble emission,expansion,and explosion during MH dissociation delay sand migration into the wellbore.At the same time,continuous water flow is a requirement for sand production during hydrate dissociation by depressurization.The experiments enlighten us that a constitutive model that can illustrate visible particle migration regimes and their transmission modes is urgently needed to bridge numerical simulation and field applications.Optimizing wellbore layout positions or special reservoir treatment shall be important for mitigating sand production tendency during NGH exploitation.

关键词： natural gas hydrate Solid particle migration Sand production Sand control Sanding hydrate exploitation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reduction of global natural gas hydrate(NGH)resource estimation and implications for the NGH development in the South China Sea

引用

Petroleum Science 2022年第1期19卷 3-12页

作者： Xiong-Qi Pang Cheng-Zao Jia Zhang-Xing Chen He-Sheng Shi Zhuo-Heng Chen Tao Hu Tong Wang Zhi Xu Xiao-Han Liu Xing-Wen Zhang En-Ze Wang Zhuo-Ya Wu Bo Pang State Key Laboratory of Petroleum Resources and Prospecting Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China China National Petroleum Corporation Beijing100007China Chemical and Petroleum Engineering Schulich School of EngineeringUniversity of CalgaryCalgaryT2N 1N4Canada Shenzhen Branch of China National Offshore Oil Corporation Ltd. GuangzhouGuangdong 510240China Geological Survey of Canada Natural Resources CanadaCalgaryT2L 2A7Canada School of Earth&Space Sciences Peking UniversityBeijing100871China

There have been at least 29 groups of estimates on the global natural gas hydrate(NGH)resource since1973,varying greatly with up to 10,000 times and showing a decreasing trend with time.For the South China Sea(SCS),35 groups of estimations were conducted on NGH resource potential since 2000,while these estimates kept almost the same with time,varying between 60 and 90 billion tons of oil equivalent(toe).What are the key factors controlling the variation trend?What are the implications of these variations for the NGH development in the world and the SCS?By analyzing the investigation characteristics of NGH resources in the world,this study divided the evaluation process into six stages and confirmed four essential factors for controlling the variations of estimates.Results indicated that the reduction trend reflects an improved understanding of the NGH formation mechanism and advancement in the resource evaluation methods,and promoted more objective evaluation results.Furthermore,the analysis process and improved evaluation method was applied to evaluate the NGH resources in the SCS,showing the similar decreasing trend of NGH resources with time.By utilizing the decreasing trend model,the predicted recoverable resources in the world and the SCS are(205-500)×10^(12)m^(3)and(0.8-6.5)×10^(12)m^(3),respectively,accounting for 20%of the total conventional oil and gas resources.Recoverable NGH resource in the SCS is only about 4%-6%of the previous estimates of 60-90 billion toe.If extracted completely,it only can support the sustainable development of China for 7 years at the current annual consumption level of oil and gas.NGH cannot be the main energy resource in future due to its low resource potential and lack of advantages in recovery.

关键词： natural gas hydrate Resource evaluation South China Sea Global NGH resource Reduction trend in NGH resource

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Economic Critical Resources for the Industrial Exploitation of natural gas hydrate

引用

Acta Geologica Sinica(English Edition) 2022年第2期96卷 663-673页

作者： CHEN Xuejun LU Hailong ZHANG Jiecheng YE Jianliang XIE Wenwei College of Engineering Peking UniversityBeijing 100871China Institute of Ocean Research Peking UniversityBeijing 100871China Beijing International Center for gas hydrate School of Earth and Space SciencesPeking UniversityBeijing 100871China Institute for Marine Science and Technology Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China Guangzhou Marine Geological Survey Guangzhou 510075China

Since the implementation of several pilot production tests were in natural gas hydrate(NGH) reservoirs in terrestrial and marine settings, the study of NGH has entered a new stage of technological development for industrial exploitation. Prior to the industrial exploitation of any given NGH reservoir, the economic feasibility should be examined. The first step of economic evaluation of a NGH reservoir is to know whether its resource amount meets the requirement for industrial exploitation. Unfortunately, few relevant studies have been conducted in this regard. In this study, the net present value(NPV) method is employed to estimate the economic critical resources required for the industrial exploitation of NGHs under different production scenarios. Sensitivity analysis is also performed in order to specify the effects of key factors, such as the number of production wells, gas price, technological improvement and tax incentive, on the economic critical resources. The results indicate that China requires the lowest economic critical resource for a NGH reservoir to be industrially exploited, ranging from 3.62 to 24.02 billion m3 methane. Changes in gas price and tax incentives also play significant roles in affecting the threshold and timeline for the industrial exploitation of NGH.

关键词： natural gas hydrate industrial exploitation economic critical resource net present value recovery factor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

natural gas hydrate shell model in gas-slurry pipeline flow

引用

Journal of natural gas Chemistry 2010年第3期19卷 261-266页

作者： Jing Gong Bohui Shi Jiankui Zhao Beijing Key laboratory of Urban Oil and gas Distribution Technology China University of Petroleum Beijing 102249 China China National Oil and gas Exploration and Development Corporation Beijing 100034 China

A hydrate shell model coupled with one-dimensional two-fluid pipe flow model was established to study the flow characteristics of gas-hydrate slurry flow system. The hydrate shell model was developed with kinetic limitations and mass transfer limitations, and it was solved by Euler method. The analysis of influence factors was performed. It was found that the diffusion coefficient was a key parameter in hydrate forming process. Considering the hydrate kinetics model and the contacting area between gas and water, the hydrate shell model was more close to its practical situations.

关键词： natural gas hydrate shell model gas-slurry pipeline flow

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：