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Stress sensitivity of formation during multi-cycle gas injection and production in an underground gas storage rebuilt from gas reservoirs 被引量:1
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作者 LI Jiqiang ZHAO Guanqun +5 位作者 QI Zhilin YIN Bingyi XU Xun FANG Feifei YANG Shenyao QI Guixue 《Petroleum Exploration and Development》 CSCD 2021年第4期968-977,共10页
Permeability sensitivity to stress experiments were conducted on standard core samples taken from Wen 23 Gas Storage at multi-cycle injection and production conditions of the gas storage to study the change pattern of... Permeability sensitivity to stress experiments were conducted on standard core samples taken from Wen 23 Gas Storage at multi-cycle injection and production conditions of the gas storage to study the change pattern of stress sensitivity of permeability.A method for calculating permeability under overburden pressure in the multi-cycle injection and production process was proposed,and the effect of stress sensitivity of reservoir permeability on gas well injectivity and productivity in UGS was analyzed.Retention rate of permeability decreased sharply first and then slowly with the increase of the UGS cycles.The stress sensitivity index of permeability decreased with the increase of cycle number of net stress variations in the increase process of net stress.The stress sensitivity index of permeability hardly changed with the increase of cycle number of net stress variations in the decrease process of net stress.With the increase of cycle number of net stress variation,the stress sensitivity index of permeability in the increase process of net stress approached that in the decrease process of net stress.The lower the reservoir permeability,the greater the irreversible permeability loss rate,the stronger the cyclic stress sensitivity,and the higher the stress sensitivity index of the reservoir,the stronger the reservoir stress sensitivity.The gas zones with permeability lower than 0.3’10-3 mm2 are not suitable as gas storage regions.Stress sensitivity of reservoir permeability has strong impact on gas well injectivity and productivity and mainly in the first few cycles. 展开更多
关键词 gas storage rebuilt from gas reservoirs multi-cycle injection and production reservoir stress sensitivity injection and production capacity gas storage layer selection
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An analysis method of injection and production dynamic transient flow in a gas field storage facility
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作者 WANG Jieming LI Chun +4 位作者 SUN Junchang TANG Ligen ZHONG Rong LIU Xianshan ZHENG Shaojing 《Petroleum Exploration and Development》 CSCD 2022年第1期179-190,共12页
A dynamic transient flow analysis method considering complex factors such as the cyclic injection and production history in a gas field storage facility was established in view of the limitations of the existing metho... A dynamic transient flow analysis method considering complex factors such as the cyclic injection and production history in a gas field storage facility was established in view of the limitations of the existing methods for transient flow analysis and the characteristics of the injection-production operation of strongly heterogeneous gas reservoirs, and the corresponding theoretical charts were drawn. In addition, an injection-production dynamic transient flow analysis model named "three points and two stages" suitable for an underground gas storage(UGS) well with alternate working conditions was proposed. The "three points" refer to three time points during cyclic injection and production, namely, the starting point of gas injection for UGS construction, the beginning and ending points of the injection-production analysis stage;and the "two stages" refer to historical flow stage and injection-production analysis stage. The study shows that the dimensionless pseudo-pressure and dimensionless pseudo-pressure integral curves of UGS well flex downward in the early stage of the injection and production process, and the dimensionless pseudo-pressure integral derivative curve is convex during the gas production period and concave during the gas injection period, and the curves under different flow histories have atypical features. The new method present in this paper can analyze transient flow of UGS accurately. The application of this method to typical wells in Hutubi gas storage shows that the new method can fit the pressure history accurately, and obtain reliable parameters and results. 展开更多
关键词 gas field storage facility injection and production performance alternate working conditions transient flow analysis theoretical chart
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Microscopic experiment on efficient construction of underground gas storages converted from water-invaded gas reservoirs
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作者 JIANG Tongwen QI Huan +4 位作者 WANG Zhengmao LI Yiqiang WANG Jinfang LIU Zheyu CAO Jinxin 《Petroleum Exploration and Development》 SCIE 2024年第1期203-212,共10页
Based on the microfluidic technology,a microscopic visualization model was used to simulate the gas injection process in the initial construction stage and the bottom water invasion/gas injection process in the cyclic... Based on the microfluidic technology,a microscopic visualization model was used to simulate the gas injection process in the initial construction stage and the bottom water invasion/gas injection process in the cyclical injection-production stage of the underground gas storage(UGS)rebuilt from water-invaded gas reservoirs.Through analysis of the gas-liquid contact stabilization mechanism,flow and occurrence,the optimal control method for lifecycle efficient operation of UGS was explored.The results show that in the initial construction stage of UGS,the action of gravity should be fully utilized by regulating the gas injection rate,so as to ensure the macroscopically stable migration of the gas-liquid contact,and greatly improve the gas sweeping capacity,providing a large pore space for gas storage in the subsequent cyclical injection-production stage.In the cyclical injection-production stage of UGS,a constant gas storage and production rate leads to a low pore space utilization.Gradually increasing the gas storage and production rate,that is,transitioning from small volume to large volume,can continuously break the hydraulic equilibrium of the remaining fluid in the porous media,which then expands the pore space and flow channels.This is conducive to the expansion of UGS capacity and efficiency for purpose of peak shaving and supply guarantee. 展开更多
关键词 water-invaded gas-reservoir underground gas storage cyclical injection-production gas-water contact gas storage and production rate UGS capacity expansion control method
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“Extreme utilization” theory and practice in gas storages with complex geological conditions 被引量:1
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作者 MA Xinhua ZHENG Dewen +1 位作者 DING Guosheng WANG Jieming 《Petroleum Exploration and Development》 SCIE 2023年第2期419-432,共14页
Based on more than 20-year operation of gas storages with complex geological conditions and a series of research findings, the pressure-bearing dynamics mechanism of geological body is revealed. With the discovery of ... Based on more than 20-year operation of gas storages with complex geological conditions and a series of research findings, the pressure-bearing dynamics mechanism of geological body is revealed. With the discovery of gas-water flowing law of multi-cycle relative permeability hysteresis and differential utilization in zones, the extreme utilization theory targeting at the maximum amount of stored gas, maximum injection-production capacity and maximum efficiency in space utilization is proposed to support the three-in-one evaluation method of the maximum pressure-bearing capacity of geological body, maximum well production capacity and maximum peak shaving capacity of storage space. This study realizes the full potential of gas storage(storage capacity) at maximum pressure, maximum formation-wellbore coordinate production, optimum well spacing density match with finite-time unsteady flow, and peaking shaving capacity at minimum pressure, achieving perfect balance between security and capacity. Operation in gas storages, such as Hutubi in Xinjiang, Xiangguosi in Xinan, and Shuang6 in Liaohe, proves that extreme utilization theory has promoted high quality development of gas storages in China. 展开更多
关键词 underground gas storage gas-storage geological body maximum pressure-bearing maximum well production capacity maximum peak shaving capacity extreme utilization theory multi-cycle relative permeability hysteresis
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Investigation of flue gas water-alternating gas (flue gas–WAG) injection for enhanced oil recovery and multicomponent flue gas storage in the post-waterflooding reservoir 被引量:3
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作者 Zhou-Hua Wang Bo-Wen Sun +5 位作者 Ping Guo Shuo-Shi Wang Huang Liu Yong Liu Dai-Yu Zhou Bo Zhou 《Petroleum Science》 SCIE CAS CSCD 2021年第3期870-882,共13页
Flue gas fooding is one of the important technologies to improve oil recovery and achieve greenhouse gas storage.In order to study multicomponent fue gas storage capacity and enhanced oil recovery(EOR)performance of f... Flue gas fooding is one of the important technologies to improve oil recovery and achieve greenhouse gas storage.In order to study multicomponent fue gas storage capacity and enhanced oil recovery(EOR)performance of fue gas water-alternating gas(fue gas-WAG)injection after continuous waterfooding in an oil reservoir,a long core fooding system was built.The experimental results showed that the oil recovery factor of fue gas-WAG fooding was increased by 21.25%after continuous waterfooding and fue gas-WAG fooding could further enhance oil recovery and reduce water cut signifcantly.A novel material balance model based on storage mechanism was developed to estimate the multicomponent fue gas storage capacity and storage capacity of each component of fue gas in reservoir oil,water and as free gas in the post-waterfooding reservoir.The ultimate storage ratio of fue gas is 16%in the fue gas-WAG fooding process.The calculation results of fue gas storage capacity showed that the injection gas storage capacity mainly consists of N_(2) and CO_(2),only N_(2) exists as free gas phase in cores,and other components of injection gas are dissolved in oil and water.Finally,injection strategies from three perspectives for fue gas storage,EOR,and combination of fue gas storage and EOR were proposed,respectively. 展开更多
关键词 Flue gas storage Enhanced oil recovery Flue gas water-alternating gas Material balance model injection strategy
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Deployment and Exploration of a Gas Storage Well Pattern Based on the Threshold Radius 被引量:2
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作者 TANG Ligen ZHU Weiyao +11 位作者 ZHU Huayin SUN Chunhui YANG Fenglai WANG Yan Li Xiaorui Li Haiming CHU Guangzhen WANG Jieming KONG Debin YUE Ming LIU Yuwei HUANG Kun 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2021年第2期630-637,共8页
To tackle the problem that wells that are deployed in a specific pattern based on the requirements of gas reservoir development are not suitable for gas storage,we have conducted concentrically circular injection and ... To tackle the problem that wells that are deployed in a specific pattern based on the requirements of gas reservoir development are not suitable for gas storage,we have conducted concentrically circular injection and production simulation experiments for gas storage,discovered the existence of a threshold radius,denoted by Rt,and derived the expression for Rt.Based on the analysis and discussion results,we propose a strategy for deploying gas storage wells in specific patterns.The expression for Rt shows that it is affected by factors such as the gas storage gas production/injection time,the upper pressure limit,the lower pressure limit,the bottomhole flow pressure at the ends of injection and production,the and permeability.The analysis and discussion results show that the Rt of a gas storage facility is much smaller than the Rt for gas reservoir development.In the gas storage facilities in China,the Rt for gas production is less than the Rt for the gas injection,and Rt increases with the difference in the operating pressure and with permeability K.Based on the characteristics of Rt,we propose three suggestions for gas storage well pattern deployment:(1)calculate Rt according to the designed functions of the gas storage facility and deploy the well pattern according to Rt;(2)deploy sparser,large-wellbore patterns in high-permeability areas and denser,small-wellbore patterns in high-permeability areas;and(3)achieve the gas injection well pattern by new drilling,and the gas production well pattern through a combination of the gas injection well pattern and old wells.By assessing a gas storage facility with a perfect well pattern after a number of adjustments,we found that the Rt of the 12 wells calculated in this paper is basically close to the corresponding actual radius,which validates our method.The results of this study provide a methodological basis for well pattern deployment in new gas storage construction. 展开更多
关键词 gas storage well deployment strategy gas injection well pattern gas production well pattern threshold radius
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Study of the Reservoir Damage during Cyclic Injection and Extraction Process in the Hutubi Gas Storage 被引量:4
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作者 Wang Jianbo Ge Hongkui +4 位作者 Wang Xiaoqiong Liu Tongyuan Liu Dunqing Zhang Yanjun Wu Shan 《Earthquake Research in China》 CSCD 2018年第2期288-300,共13页
During the injection and extraction process in gas storage,cyclic loading stress is applied to the reservoir pore structure,affecting the capacity and service life of gas storage. To study the influence of cyclic inje... During the injection and extraction process in gas storage,cyclic loading stress is applied to the reservoir pore structure,affecting the capacity and service life of gas storage. To study the influence of cyclic injection and extraction on reservoir physical property,a finite-element model of reservoir elastoplastic damage under the effect of pore pressure is established based on elastoplastic mechanics and fatigue-damage mechanics. Considering the mechanical property of the Hutubi reservoir and the injection-extraction mode of gas storage,the finite-element model is used to study the pore pressure and porosity change,fault safety,and ground surface deformation. The results show that the change in pore pressure and porosity,the deformation of the Hutubi fault,as well as the uplift and sink of the grounds surface are controlled by the fatigue damage of the reservoir pore structure during the injection-extraction process. After a 6-year service life, the cumulative deformation of the reservoir pore reaches its limit,causing pore structure collapse and porosity decrease. As a result,storage capacity declines and the ground surface starts to sink. Through this study,the safety of the Hutubi gas storage is evaluated,and some suggestions for field operations are offered. 展开更多
关键词 gas storage Injected/extracted FATIGUE DAMAGE POROSITY
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Simulation of pore space production law and capacity expansion mechanism of underground gas storage
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作者 LIU Tao LI Yiqiang +7 位作者 DING Guosheng WANG Zhengmao SHI Lei LIU Zheyu TANG Xiang CAO Han CAO Jinxin HUANG Youqing 《Petroleum Exploration and Development》 CSCD 2022年第6期1423-1429,共7页
One-dimensional gas injection storage building and one-cycle injection-production modeling experiment,and two-dimensional flat core storage building and multi-cycle injection-production modeling experiment were carrie... One-dimensional gas injection storage building and one-cycle injection-production modeling experiment,and two-dimensional flat core storage building and multi-cycle injection-production modeling experiment were carried out using one-dimensional long core and large two-dimensional flat physical models to find out the effects of reservoir physical properties and injection-production balance time on reservoir pore utilization efficiency,effective reservoir capacity formation and capacity-reaching cycle.The results show that reservoir physical properties and formation water saturation are the main factors affecting the construction and operation of gas-reservoir type underground gas storage.During the construction and operation of gas-reservoir type gas storage,the reservoir space can be divided into three types of working zones:high efficiency,low efficiency and ineffective ones.The higher the reservoir permeability,the higher the pore utilization efficiency is,the smaller the ineffective working zone is,or there is no ineffective working zone;the smaller the loss of injected gas is,and the higher the utilization rate of pores is.The better the reservoir physical properties,the larger the reservoir space and the larger the final gas storage capacity is.The higher the water saturation of the reservoir,the more the gas loss during gas storage capacity building and operation is.Optimizing injection-production regime to discharge water and reduce water saturation is an effective way to reduce gas loss in gas storage.In the process of multiple cycles of injection and production,there is a reasonable injection-production balance time,further extending the injection-production balance period after reaching the reasonable time has little contribution to the expansion of gas storage capacity. 展开更多
关键词 gas reservoir-type underground gas storage multi-cycle injection and production injection-production equilibrium time pore utilization efficiency effective gas storage volume
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Forecast of natural gas supply and demand in China under the background of “Dual Carbon Targets” 被引量:1
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作者 JIA Ailin CHENG Gang +1 位作者 CHEN Weiyan LI Yilong 《Petroleum Exploration and Development》 SCIE 2023年第2期492-504,共13页
As a kind of clean energy which creates little carbon dioxide, natural gas will play a key role in the process of achieving “Peak Carbon Dioxide Emission” and “Carbon Neutrality”. The Long-range Energy Alternative... As a kind of clean energy which creates little carbon dioxide, natural gas will play a key role in the process of achieving “Peak Carbon Dioxide Emission” and “Carbon Neutrality”. The Long-range Energy Alternatives Planning System(LEAP) model was improved by using new parameters including comprehensive energy efficiency and terminal effective energy consumption. The Back Propagation(BP) Neural Network–LEAP model was proposed to predict key data such as total primary energy consumption, energy mix, carbon emissions from energy consumption, and natural gas consumption in China. Moreover, natural gas production in China was forecasted by the production composition method. Finally, based on the forecast results of natural gas supply and demand, suggestions were put forward on the development of China’s natural gas industry under the background of “Dual Carbon Targets”. The research results indicate that under the background of carbon peak and carbon neutrality, China’s primary energy consumption will peak(59.4×10^(8)tce) around 2035, carbon emissions from energy consumption will peak(103.4×10^(8)t) by 2025, and natural gas consumption will peak(6100×10^(8)m^(3)) around 2040, of which the largest increase will be contributed by the power sector and industrial sector. China’s peak natural gas production is about(2800–3400)×10^(8)m^(3), including(2100–2300)×10^(8)m^(3)conventional gas(including tight gas),(600–1050)×10^(8)m^(3)shale gas, and(150–220)×10^(8)m^(3)coalbed methane. Under the background of carbon peak and carbon neutrality, the natural gas consumption and production of China will further increase, showing a great potential of the natural gas industry. 展开更多
关键词 carbon peak and carbon neutrality energy mix carbon emissions natural gas consumption natural gas produc-tion new energy system terminal consumption scale production supply storage and marketing
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Progress and prospects of oil and gas production engineering technology in China 被引量:2
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作者 ZHENG Xinquan SHI Junfeng +4 位作者 CAO Gang YANG Nengyu CUI Mingyue JIA Deli LIU He 《Petroleum Exploration and Development》 CSCD 2022年第3期644-659,共16页
This paper summarizes the important progress in the field of oil and gas production engineering during the"Thirteenth Five-Year Plan"period of China,analyzes the challenges faced by the current oil and gas p... This paper summarizes the important progress in the field of oil and gas production engineering during the"Thirteenth Five-Year Plan"period of China,analyzes the challenges faced by the current oil and gas production engineering in terms of technological adaptability,digital construction,energy-saving and emission reduction,and points out the future development direction.During the"Thirteenth Five-Year Plan"period,series of important progresses have been made in five major technologies,including separated-layer injection,artificial lift,reservoir stimulation,gas well de-watering,and workover,which provide key technical support for continuous potential tapping of mature oilfields and profitable production of new oilfields.Under the current complex international political and economic situation,oil and gas production engineering is facing severe challenges in three aspects:technical difficulty increases in oil and gas production,insignificant improvements in digital transformation,and lack of core technical support for energy-saving and emission reduction.This paper establishes three major strategic directions and implementation paths,including oil stabilization and gas enhancement,digital transformation,and green and low-carbon development.Five key research areas are listed including fine separated-layer injection technology,high efficiency artificial lift technology,fine reservoir stimulation technology,long term gas well de-watering technology and intelligent workover technology,so as to provide engineering technical support for the transformation,upgrading and high-quality development of China’s oil and gas industry. 展开更多
关键词 oil and gas production engineering separated-layer injection artificial lift reservoir stimulation gas well de-watering WORKOVER digital transformation low carbon economy
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Gas-water-rock interactions and factors affecting gas storage capacity during natural gas storage in a low permeability aquifer 被引量:3
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作者 TOOSEH Esmaeel Kazemi JAFARI Arezou TEYMOURI Ali 《Petroleum Exploration and Development》 2018年第6期1123-1128,共6页
Gas-water-rock interactions during natural gas storage in a low permeability aquifer and main factors affecting the storage capacity were investigated in laboratory with core experiments. The results showed that gas i... Gas-water-rock interactions during natural gas storage in a low permeability aquifer and main factors affecting the storage capacity were investigated in laboratory with core experiments. The results showed that gas injection flow rate had a major impact on stored gas volume and stored gas volume is higher at high flow rate. Gas storage volume ranged between 6%-20% of the pore space at experimental condition. Enhancing injection pressure can enhance gas storage volume. Statistics showed that injection flow rate had a greater influence on the gas storage volume than pressure. The retention time also had an impact on the gas storage process. Most of the natural gas was trapped in the reservoir and could not be produced after long time of retention. Atomic absorption spectroscopy indicated that ions concentrations of the brine and water evaporation increased when gas was injected into brine saturated core, and precipitation might occur, reducing porosity and permeability of core. Gas chromatography analysis showed that the concentration of carbon dioxide in the natural gas decreased and the concentration of methane increased after storage in the core. 展开更多
关键词 UNDERGROUND gas storage natural gas gas storage volume AQUIFER gas injection rate gas injection pressure
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CO_(2),N_(2),and CO_(2)/N_(2)mixed gas injection for enhanced shale gas recovery and CO_(2)geological storage
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作者 Jianfa WU Haoran HU +7 位作者 Cheng CHANG Deliang ZHANG Jian ZHANG Shengxian ZHAO Bo WANG Qiushi ZHANG Yiming CHEN Fanhua ZENG 《Frontiers in Energy》 SCIE CSCD 2023年第3期428-445,共18页
In this work,using fractured shale cores,isothermal adsorption experiments and core flooding tests were conducted to investigate the performance of injecting different gases to enhance shale gas recovery and CO_(2)geo... In this work,using fractured shale cores,isothermal adsorption experiments and core flooding tests were conducted to investigate the performance of injecting different gases to enhance shale gas recovery and CO_(2)geological storage efficiency under real reservoir conditions.The adsorption process of shale to different gases was in agreement with the extended-Langmuir model,and the adsorption capacity of CO_(2)was the largest,followed by CH_(4),and that of N_(2)was the smallest of the three pure gases.In addition,when the CO_(2)concentration in the mixed gas exceeded 50%,the adsorption capacity of the mixed gas was greater than that of CH4,and had a strong competitive adsorption effect.For the core flooding tests,pure gas injection showed that the breakthrough time of CO_(2)was longer than that of N_(2),and the CH_(4)recovery factor at the breakthrough time(Rch,)was also higher than that of N_(2).The RcH of CO_(2)gas injection was approximately 44.09%,while the RcH,of N_(2)was only 31.63%.For CO_(2)/N_(2)mixed gas injection,with the increase of CO_(2)concentration,the RcH,increased,and the RcH,for mixed gas CO_(2)/N_(2)=8:2 was close to that of pure CO_(2),about 40.24%.Moreover,the breakthrough time of N_(2)in mixed gas was not much different from that when pure N_(2)was injected,while the breakthrough time of CO_(2)was prolonged,which indicated that with the increase of N_(2)concentration in the mixed gas,the breakthrough time of CO_(2)could be extended.Furthermore,an abnormal surge of N_(2)concentration in the produced gas was observed after N_(2)breakthrough.In regards to CO_(2)storage efficiency(S_(Storage-CO_(2)),as the CO_(2)concentration increased,S storage-co_(2)also increased.The S storage-co_(2),of the pure CO_(2)gas injection was about 35.96%,while for mixed gas CO_(2)/N_(2)=8:2,S sorage-co,was about 32.28%. 展开更多
关键词 shale gas gas injection competitive adsorption enhanced shale gas recovery CO_(2)geological storage
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Project of Underground Natural Gas Storage in Dagang Oilfield
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作者 Cui Lihong and Wang Ling(Geogical Research Institute of Dagang Oilfield Group Ltd, Company) 《China Oil & Gas》 CAS 1998年第3期147-148,共2页
关键词 storage PHYSICAL PROPERTY injection-production system COMPREHENSIVE evaluation INTRODUCTION
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基于IAOA-KELM的储气库注采管柱内腐蚀速率预测 被引量:1
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作者 骆正山 于瑶如 +1 位作者 骆济豪 王小完 《安全与环境学报》 CAS CSCD 北大核心 2024年第3期971-977,共7页
针对储气库注采管柱的内腐蚀速率预测问题,建立了基于阿基米德优化算法(Archimedes Optimization Algorithm,AOA)与核极限学习机(Kernel Extreme Learning Machine,KELM)相结合的模型提高腐蚀速率预测精度。通过引入佳点集、改进密度降... 针对储气库注采管柱的内腐蚀速率预测问题,建立了基于阿基米德优化算法(Archimedes Optimization Algorithm,AOA)与核极限学习机(Kernel Extreme Learning Machine,KELM)相结合的模型提高腐蚀速率预测精度。通过引入佳点集、改进密度降低因子、采用黄金正弦算法缩小搜索空间,提高局部开发能力,利用改进阿基米德优化算法(Improved Archimedes Optimization Algorithm,IAOA)优化KELM正则化系数(C)和核函数参数(γ),进而建立IAOA-KELM储气库注采管柱内腐蚀速率预测模型;使用MATLAB软件运用该模型对某注采管柱内腐蚀数据集进行学习与预测,将IAOA-KELM模型与KELM、粒子群优化算法(Particle Swarm Optimization,PSO)-KELM、AOA-KELM结果进行预测误差对比。结果表明,IAOA-KELM模型的预测值与实际值较为拟合,其E RMSE为0.65%,E MAE为0.39%,R 2为99.83%,均优于其他模型。研究表明,IAOA-KELM模型能够更为准确地预测储气库注采管柱内腐蚀速率,为储气库注采管柱的运维及储气库的健康管理提供参考。 展开更多
关键词 安全工程 地下储气库 注采管柱 核极限学习机 改进阿基米德优化算法 腐蚀速率
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水侵气藏型储气库全周期高效建设微观模拟实验
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作者 江同文 齐桓 +4 位作者 王正茂 李宜强 王锦芳 刘哲宇 曹金鑫 《石油勘探与开发》 EI CSCD 北大核心 2024年第1期182-189,共8页
借助微观可视化模型与微流控技术,开展了水侵气藏型储气库初期建库阶段注气驱水及循环储采阶段采气底水上侵、储气排驱水体的模拟实验,分析气液界面稳定机制、气液渗流与赋存规律,探索储气库全周期高效运行的优化调控方式。研究表明:储... 借助微观可视化模型与微流控技术,开展了水侵气藏型储气库初期建库阶段注气驱水及循环储采阶段采气底水上侵、储气排驱水体的模拟实验,分析气液界面稳定机制、气液渗流与赋存规律,探索储气库全周期高效运行的优化调控方式。研究表明:储气库初期建库阶段应调控注气速度,充分发挥重力作用保证气液界面宏观稳定运移,大幅度提高气体的波及能力,为储气库后续循环储采阶段提供更大的储气孔隙空间。储气库循环储采阶段,恒定的储采气速度导致孔隙空间利用率低,逐渐提高储采气速度,从“小吞小吐”逐渐过渡到“大吞大吐”,可以持续打破孔喉内流体的平衡受力状态,扩大储气孔隙空间与流动通道,有利于储气库扩容增效和调峰保供。 展开更多
关键词 水侵气藏型储气库 循环储采 气水界面 储采气速度 储气库扩容 调控方式
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高速注采储气库井套管螺纹密封性研究
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作者 宋巍 周岩 +2 位作者 吴艳 杨燕 叶盛军 《西南石油大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第3期170-178,共9页
套管螺纹密封性是影响周期性高速注采作业的储库气井安全性的关键因素,因此保证储气库井的密封性完整极其重要。需要重点研究储气库井注采过程中对其套管柱密封性的影响,特别是循环注采过程中产生的交变载荷对储气库套管柱特殊螺纹接头... 套管螺纹密封性是影响周期性高速注采作业的储库气井安全性的关键因素,因此保证储气库井的密封性完整极其重要。需要重点研究储气库井注采过程中对其套管柱密封性的影响,特别是循环注采过程中产生的交变载荷对储气库套管柱特殊螺纹接头密封结构性能的影响。基于有限元法理论,针对中国北部某储气库井所选用的特殊螺纹接头,结合储气库井实际工况和现场数据,建立套管接头螺纹有限元计算模型,研究了循环注采条件下,温度、注采压力、轴向载荷及点蚀对储气库套管螺纹密封状态的影响。结果表明,温度对套管螺纹接头的结构完整性和密封完整性影响较小,注采压力、轴向载荷和点蚀对其影响较大,需控制在一个较低值。研究可为储气库井套管柱密封失效判定及其套管柱设计提供参考。 展开更多
关键词 储气库井 特殊螺纹接头 套管密封性 高速注采 交变载荷
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光纤传感技术在油气田开发中的应用
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作者 刘合 王松 +2 位作者 叶泽禹 周慰 李沁泽 《石油物探》 CSCD 北大核心 2024年第4期707-717,共11页
分布式光纤监测技术在油气田开发中具有无可比拟的优势。从分布式光纤传感技术基本原理和井中布设方式出发,介绍了光纤传感技术在水力压裂、连续油管产液剖面测试、邻井压裂监测、油气井注采监测、储气库安全监测和套损监测等多个石油... 分布式光纤监测技术在油气田开发中具有无可比拟的优势。从分布式光纤传感技术基本原理和井中布设方式出发,介绍了光纤传感技术在水力压裂、连续油管产液剖面测试、邻井压裂监测、油气井注采监测、储气库安全监测和套损监测等多个石油工程领域应用情况。整体表明光纤监测是一种经济高效的监测技术,具备实时监控油气井全生命周期的潜力,是具有科学性、时代特性和安全高效的生产测井技术。同时指出分布式光纤传感技术在油田应用的未来发展应聚焦于提升传感器性能、丰富光纤监测场景应用、提高资料处理解释水平能力,降低应用成本,进一步发挥光纤在油气田开发中的作用。 展开更多
关键词 分布式光纤传感 水力压裂 产液剖面测试 压裂监测 注采监测 储气库安全监测 套损监测
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双井周期注CO_(2)联合降压法开采天然气水合物分析 被引量:1
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作者 张逸群 杜红星 +1 位作者 王海柱 李根生 《天然气工业》 EI CAS CSCD 北大核心 2024年第3期199-213,共15页
相较于单纯地封存CO_(2),CO_(2)置换法开采天然气水合物(以下简称水合物)能够满足水合物资源开采和碳封存的双重需求。为确保安全高效开发水合物的同时提高CO_(2)封存率,按照双井周期注入CO_(2)联合降压法开采水合物的思路,以中国南海... 相较于单纯地封存CO_(2),CO_(2)置换法开采天然气水合物(以下简称水合物)能够满足水合物资源开采和碳封存的双重需求。为确保安全高效开发水合物的同时提高CO_(2)封存率,按照双井周期注入CO_(2)联合降压法开采水合物的思路,以中国南海典型水合物藏为研究对象,建立了矿藏尺度水合物注采热—流—固—化四场耦合数值模型,并开展了连续、间歇、循环3类注入开采方案和单井降压开采方案的对比分析,然后模拟分析注CO_(2)辅助水合物降压开采的增产效果,最后对比了不同注入方案的CO_(2)回收和封存情况,探索了水合物法碳封存的可行性。研究结果表明:(1)邻井CO_(2)的注入有助于降低产水量并缓解降压开采引起的地质沉降;(2)间歇注入较循环注入可促进储层中CO_(2)水合物生成,扩大注入井附近的高温区域,有利于生产井附近水合物的分解;(3)连续注入方式有利于分解气体的产出,但双井注采模式降低了甲烷水合物分解程度;(4)双井注采的CO_(2)注入分为快速注入阶段、反转阶段和缓慢注入阶段,其中双井间歇注入方案的CO_(2)注入效率最高。结论认为,双井间歇注入CO_(2)复合降压法能够在安全、高效开采水合物的同时具有相对可观的碳封存效果,是一种实现水合物商业化开采和助力双碳目标实现的潜在方法,研究成果对于天然气水合物开发及CO_(2)地质封存具有理论指导意义。 展开更多
关键词 天然气水合物 降压开采 CO_(2) 双井循环注入 产能模拟 碳封存 水合物分解 地质沉降
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枯竭气藏型储气库多周期损耗计算方法及其应用 被引量:1
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作者 张平 黄发木 +5 位作者 付亚平 孙云峰 苏海波 鲁俊 王健 杨火海 《大庆石油地质与开发》 CAS 北大核心 2024年第2期86-92,共7页
地下储气库在生产运行过程中不可避免地会产生天然气损耗。目前对储气库气体损耗的研究仅停留在定性描述阶段,无法满足储气库经济性定量评价的要求。结合清单分析理论和注采机理实验,针对地下储气库注采过程中存在的微渗漏、溶解扩散、... 地下储气库在生产运行过程中不可避免地会产生天然气损耗。目前对储气库气体损耗的研究仅停留在定性描述阶段,无法满足储气库经济性定量评价的要求。结合清单分析理论和注采机理实验,针对地下储气库注采过程中存在的微渗漏、溶解扩散、异常漏气和宏观漏气现象,建立了天然气损耗评价数学模型,对地下储气库气体损耗进行定量评价。结果表明:宏观驱替过程中的气体损耗是储气库气体损耗的主要组成部分,随着注采周期的增加而减小;在此基础上,建立了储气库型储气库天然气损耗定量评价方法,并以中原油田某地下储气库天然气损耗计算结果为例,利用该方法核算了该储气库自建库以来的各部分损耗情况并制定了降低损耗的技术对策。依托该计算方法可合理制定降低储气库天然气损耗政策,提供泄漏风险预警,提高储气库经济效益和注采安全性。 展开更多
关键词 地下储气库 天然气损耗 宏观驱替 注采周期 定量评价
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裂缝-孔隙型枯竭气藏储气库一体化注采运行评价
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作者 于洪敏 张亚雄 +6 位作者 牛保伦 王志宝 代全齐 刘静 王鹏 孙静静 《油气与新能源》 2024年第1期66-71,共6页
为诊断评价裂缝-孔隙型枯竭气藏储气库注采运行状况及单井注采能力,针对中原油田储气库,建立考虑应力敏感的裂缝-孔隙型储层-井筒-地面一体化模型,以一体化模拟为手段,以地层压力、注采气量界限为约束,分析储气库注采能力影响因素,诊断... 为诊断评价裂缝-孔隙型枯竭气藏储气库注采运行状况及单井注采能力,针对中原油田储气库,建立考虑应力敏感的裂缝-孔隙型储层-井筒-地面一体化模型,以一体化模拟为手段,以地层压力、注采气量界限为约束,分析储气库注采能力影响因素,诊断储气库注采运行制约瓶颈,评价储气库系统注采能力。研究表明:井口和井底压力、油管尺寸等对储气库注采气量影响较大;储气库气藏压力低于27 MPa,所受应力超过50 MPa,采气指数明显下降,应力敏感性更强;低压时可能存在临界携液情况,但无冲蚀影响;压力下合理注气量为71×10^(4)m^(3)/d,合理采气量43×10^(4)m^(3)/d。此研究可为裂缝-孔隙型储气库注采运行评价提供参考。 展开更多
关键词 裂缝-孔隙型 储气库 一体化 注采运行 注采能力 评价
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