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A semianalytical model of fractured horizontal well with hydraulic fracture network in shale gas reservoir for pressure transient analysis 页岩气藏水力裂缝网络压裂水平井压力瞬态分析半解析模型
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-06-18 DOI: 10.46690/ager.2023.06.06
Qianchen Cui, Yu-long Zhao, Liehui Zhang, Man Chen, Shangjun Gao, Zhangxing Chen
Cited as: Cui, Q., Zhao, Y., Zhang, L., Chen, M., Gao, S., Chen, Z. A semianalytical model of fractured horizontal well with hydraulic fracture network in shale gas reservoir for pressure transient analysis. Advances in Geo-Energy Research, 2023, 8(3): 193-205. https://doi.org/10.46690/ager.2023.06.06 Abstract: Accurate construction of a seepage model for a multifractured horizontal well in a shale gas reservoir is essential to realizing the forecast of gas well production, the pressure transient analysis, and the inversion of the postfracturing parameters. This study introduces a method for determining the fracture control region to characterize the flow area of the matrix within the hydraulic fracture network, distinguishing the differences in the flow range of the matrix system between the internal and external regions caused by the hydraulic fracture network structure. The corresponding derivation and solution methods of the semi-analytical seepage model for fractured shale gas well are provided, followed by the application of case studies, model validation, and sensitivity analysis of parameters. The results indicate that the proposed model yields computational results that closely align with numerical simulations. It is observed that disregarding the differentiation of matrix flow area between the internal and external regions of the fracture network led to an overestimation of the estimated ultimate recovery, and the boundary-controlled flow period in typical well testing curves will appear earlier. Because hydraulic fracture conductivity can be influenced by multiple factors simultaneously, conducting a sensitivity analysis using combined parameters could lead to inaccurate results in the inversion of fracture parameters.
引用:崔,Q.,赵,Y.,张,L.,陈,M.,高,S.,陈,Z.页岩气藏水力裂缝网络压裂水平井压力瞬变分析半分析模型。地球能源研究进展,2023,8(3):193-205。https://doi.org/10.46690/ager.2023.06.06摘要:准确构建页岩气藏多裂缝水平井渗流模型,对于实现气井产量预测、压力瞬态分析和压裂后参数反演至关重要。本研究介绍了一种确定裂缝控制区的方法,以表征水力裂缝网络内基质的流动面积,区分水力裂缝网络结构引起的内部和外部区域基质系统流动范围的差异。给出了裂缝性页岩气井半解析渗流模型的相应推导和求解方法,并进行了实例分析、模型验证和参数敏感性分析。结果表明,所提出的模型产生的计算结果与数值模拟非常吻合。可以观察到,忽略裂缝网络内部和外部区域之间基质流动面积的差异会导致对估计的最终采收率的高估,并且典型试井曲线中的边界控制流动期会更早出现。由于水力裂缝导流能力可能同时受到多个因素的影响,使用组合参数进行敏感性分析可能会导致裂缝参数反演结果不准确。
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引用次数: 2
Simulation of the effect of stand-off parameter on collapse behaviours of a single cavitation bubble in jet drilling 射流钻井中支座参数对单个空化气泡坍塌行为影响的模拟
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-06-16 DOI: 10.46690/ager.2023.06.05
Xiaoya Wu, Yiqun Zhang, H. Huang, Chengyu Hui, Z. Hu, Gensheng Li
: Cavitation jet drilling has been extensively employed for the exploitation of geo-energy resources. The dynamics of cavitation bubbles in close proximity to the solid boundary have been a subject of great interest during jet drilling, as they play a crucial role in determining the cavitation performance. In present work, the dynamics of a single cavitation bubble near a solid surface is numerically investigated by using the axisymmetric Navier-Stokes equations and the volume of fluid method with considering the surface tension of gas-liquid interface, liquid viscosity and compressibility of gas in bubble. The simulated profiles are qualitatively and quantitatively consistent with the experimental images, which proves the reliability of employed numerical model. The effects of stand-off distance on the bubble profiles, bubble volume and collapse time have been analysed. Moreover, the cavitation erosion patterns towards the solid wall are also revealed for different dimensionless stand-off distances. The simulation results reveal two distinct collapse patterns for the bubble profiles. The solid wall significantly impedes the shrinkage rate of the bubble, resulting in the longest collapse time when the dimensionless stand-off distance is 1.0. Three erosion patterns of cavitation bubbles towards the solid wall are observed, with the shock wave and micro-jet both contributing significantly to the damage caused by cavitation erosion. The shock wave sweeps the wall resulting in circular corrosion pits with a severely eroded centre, while the micro jet penetrates the wall leading to small spot corrosion pits.
空化射流钻井已被广泛用于开发地能资源。在射流钻井过程中,紧邻固体边界的空化气泡的动力学一直是一个备受关注的主题,因为它们在决定空化性能方面起着至关重要的作用。本文采用轴对称Navier-Stokes方程和流体体积法,考虑气液界面的表面张力、液体粘度和气泡中气体的压缩性,对固体表面附近单个空化气泡的动力学进行了数值研究。模拟剖面与实验图像在定性和定量上一致,证明了所用数值模型的可靠性。分析了间隔距离对气泡轮廓、气泡体积和坍塌时间的影响。此外,对于不同的无量纲对峙距离,还揭示了向固体壁的空化侵蚀模式。模拟结果揭示了气泡剖面的两种不同的塌陷模式。固体壁显著阻碍了气泡的收缩率,当无量纲对峙距离为1.0时,导致最长的坍塌时间。观察到空化气泡对实体壁的三种侵蚀模式,冲击波和微射流都对空化侵蚀造成的损伤有显著贡献。冲击波扫过墙壁,形成中心严重腐蚀的圆形腐蚀坑,而微射流穿透墙壁,形成小的点状腐蚀坑。
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引用次数: 1
APyCE: A Python module for parsing and visualizing 3D reservoir digital twin models APyCE:用于解析和可视化3D油藏数字孪生模型的Python模块
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-06-12 DOI: 10.46690/ager.2023.06.07
Mateus Tosta, G. P. Oliveira, Bin Wang, Zhiming Chen, Q. Liao
: Engineers, geoscientists, and analysts can benefit from fast, easy, and real-time immersive 3D visualization to enhance their understanding and collaboration in a virtual 3D world. However, converting 3D reservoir data formats between different software programs and open-source standards can be challenging due to the complexity of programming and discrepancies in internal data structures. This paper introduces an open-source Python implementation focused on parsing industry reservoir data formats into a popular open-source visualization data format, Visual Toolkit files. Using object-oriented programming, a simple workflow was developed to export corner-point grids to Visual Toolkit-hexahedron structures. To demonstrate the utility of the software, standard raw input files of reservoir models are processed and visualized using Paraview. This tool aims to accelerate the digital transformation of the oil and gas industry in terms of 3D digital content generation and collaboration.
工程师、地球科学家和分析师可以从快速、简单和实时的沉浸式3D可视化中受益,以增强他们在虚拟3D世界中的理解和协作。然而,由于编程的复杂性和内部数据结构的差异,在不同软件程序和开源标准之间转换3D油藏数据格式可能具有挑战性。本文介绍了一个开源Python实现,专注于将工业油藏数据格式解析为流行的开源可视化数据格式Visual Toolkit文件。采用面向对象的编程方法,开发了一个简单的将角点网格导出到visualtoolkit -六面体结构的工作流。为了证明该软件的实用性,使用Paraview对油藏模型的标准原始输入文件进行了处理和可视化。该工具旨在加速油气行业在3D数字内容生成和协作方面的数字化转型。
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引用次数: 0
Effect of drilling and wellbore geometry parameters on wellbore temperature profile: Implications for geothermal production 钻井和井筒几何参数对井筒温度剖面的影响:对地热生产的影响
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-06-10 DOI: 10.46690/ager.2023.06.04
Mostafa M. Abdelhafiz, J. Oppelt, O. Mahmoud, L. Hegele
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引用次数: 0
Dynamic mechanisms of tight gas accumulation and numerical simulation methods: Narrowing the gap between theory and field application 致密气成藏动力学机制及数值模拟方法——缩小理论与现场应用的差距
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-05-31 DOI: 10.46690/ager.2023.06.02
Wenfeng Zhao, C. Jia, Yan Song, Xiangfang Li, L. Hou, Lin Jiang
Cited as: Zhao, W., Jia, C., Song, Y., Li, X., Hou, L., Jiang, L. Dynamic mechanisms of tight gas accumulation and numerical simulation methods: Narrowing the gap between theory and field application. Advances in Geo-Energy Research, 2023, 8(3): 146-158. https://doi.org/10.46690/ager.2023.06.02 Abstract: Despite the significant progress made in tight gas exploration and development in recent years, the understanding of the dynamic mechanisms of tight gas accumulation is still limited, and numerical simulation methods are lacking. In fact, the gap between theory and field application has become an obstacle to the development of tight gas exploration and development. This work sheds light on the dynamic mechanisms of hydrocarbon accumulation in tight formations from the aspect of capillary self-sealing theory by embedding calculation of pressureand temperature-dependent capillary force in a pore network model. The microscale dynamic mechanisms are scaled up to the reservoir level by geological simulation, and the quantitative evaluation of reserves based on real geological sections is realized. From the results, several considerations are made to assist with resource assessment and sweet spot prediction. Firstly, the self-sealing effect of capillary in the micro-nano pore-throat system is at the core of tight sandstone gas accumulation theory; the hydrocarbon-generated expansion force is the driving force, and capillary force comprises the resistance. Furthermore, microscopic capillary force studies can be embedded into a pore network model and scaled up to a geological model using relative permeability curve and capillary force curve. Field application can be achieved by geological numerical simulations at the reservoir scale. Finally, high temperature and high pressure can reduce capillary pressure, which increases gas saturation and reserves.
引为:赵,W.,贾,C.,宋,Y.,李,X.,侯,L.,江,L.致密气成藏动力学机制及数值模拟方法:缩小理论与现场应用的差距。地球能源研究进展,2023,8(3):146-158。https://doi.org/10.46690/ager.2023.06.02摘要:尽管近年来致密气勘探开发取得了重大进展,但对致密气成藏动力学机制的认识仍然有限,缺乏数值模拟方法。事实上,理论与现场应用之间的差距已经成为致密气勘探开发发展的障碍。本文通过将压力和温度相关毛细管力的计算嵌入孔隙网络模型,从毛细管自封闭理论的角度揭示了致密地层中油气聚集的动力学机制。通过地质模拟将微观动力机制放大到水库水位,实现了基于真实地质剖面的储量定量评价。从结果中,我们考虑了一些因素来帮助进行资源评估和最佳点预测。首先,微纳孔喉系统中毛细管的自封闭作用是致密砂岩气藏理论的核心;碳氢化合物产生的膨胀力是驱动力,毛细管力包括阻力。此外,微观毛细管力研究可以嵌入孔隙网络模型中,并使用相对渗透率曲线和毛细管力曲线放大为地质模型。现场应用可以通过油藏规模的地质数值模拟来实现。最后,高温高压可以降低毛细管压力,从而增加天然气饱和度和储量。
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引用次数: 3
Improved Duncan-Chang model for reconstituted hydrate-bearing clayey silt from the South China Sea 改进的Duncan—Chang模型研究南海含水凝土的再造
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-05-22 DOI: 10.46690/ager.2023.05.07
Lin Dong, N. Wu, Yajuan Zhang, Hualin Liao, G. Hu, Yanlong Li
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引用次数: 1
Gas well performance prediction using deep learning jointly driven by decline curve analysis model and production data 基于递减曲线分析模型和生产数据的深度学习气井动态预测
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-05-22 DOI: 10.46690/ager.2023.06.03
Liang Xue, Jiabao Wang, Jiangxia Han, Minjing Yang, Mpoki Sam Mwasmwasa, Felix Nanguka
: The prediction of gas well performance is crucial for estimating the ultimate recovery rate of natural gas reservoirs. However, physics-based numerical simulation methods require a significant effort to build a robust model, while the decline curve analysis method used in this field is based on certain assumptions, hence its applications are limited due to the strict working conditions. In this work, a deep learning model driven jointly by the decline curve analysis model and production data is proposed for the production performance prediction of gas wells. Due to the time-series characteristics of gas well production data, the long short-term memory neural network is selected to establish the architecture of artificial intelligence. The existing decline curve analysis model is first implicitly incorporated into the training process of the neural network and then used to drive the neural network construction along with the actual gas well production historical data. By applying the proposed innovative model to analyze the conventional and tight gas well performance predictions based on field data, it is demonstrated that the proposed long short-term memory neural network deep learning model driven jointly by the decline curve analysis model and production data can effectively improve the interpretability and predictive ability of the traditional long short-term memory neural network model driven by production data alone. Compared with the data-driven model, the jointly driven model can reduce the mean absolute error by 42.90% and 13.65% for a tight gas well and a carbonate gas well, respectively.
:气井动态预测对于估算天然气藏的最终采收率至关重要。然而,基于物理的数值模拟方法需要花费大量精力来建立一个稳健的模型,而该领域中使用的下降曲线分析方法是基于某些假设的,因此由于严格的工作条件,其应用受到限制。在这项工作中,提出了一种由递减曲线分析模型和生产数据共同驱动的深度学习模型,用于气井的生产性能预测。由于气井生产数据的时间序列特征,选择长短期记忆神经网络来建立人工智能的体系结构。现有的递减曲线分析模型首先隐式地纳入神经网络的训练过程,然后与实际气井产量历史数据一起用于驱动神经网络的构建。通过应用所提出的创新模型来分析基于现场数据的常规气井和致密气井的性能预测,研究表明,所提出的由下降曲线分析模型和生产数据联合驱动的长短期记忆神经网络深度学习模型,可以有效地提高传统的由生产数据单独驱动的长短段记忆神经网络模型的可解释性和预测能力。与数据驱动模型相比,对于致密气井和碳酸盐气井,联合驱动模型可以分别将平均绝对误差降低42.90%和13.65%。
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引用次数: 0
Experimental and numerical modeling of deformation-cracking mechanics of 3D-printed rock samples with single fracture 单裂隙3d打印岩样变形-开裂力学实验与数值模拟
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-05-15 DOI: 10.46690/ager.2023.05.06
R. Song, Jun Tian, Mingyang Wu, J. Liu
: The analysis of mechanical response and deformation-cracking behavior contributes to the high-efficiency extraction of geo-energy and long-term safety of underground engineering structures. Compared to natural cores, the mechanical properties of 3D-printed samples made from quartz sand as raw material are relatively homogeneous, and can be used for quantitative studies on the influence of natural defects on the mechanical properties of rocks. In this work, 3D-printed samples with single fractures of different crack angles, lengths and widths were fabricated and used for uniaxial compression tests. Adopting the digital image correlation method, the stress-strain distribution during uniaxial compression tests were visualized, and the influence of prefabricated fracture characteristics (dip angle, length, and width) on the deformation-failure process were studied. An extended finite element method subroutine for ABAQUS ® software was modeled and used for the uniaxial compression simulation, which was validated by experiments. Then, the influence of mechanical parameters (Young’s modulus, Poisson’s ratio, cohesion
对地下工程结构的力学响应和变形开裂行为进行分析,有助于高效地提取地能,保证地下工程结构的长期安全。与天然岩心相比,以石英砂为原料的3d打印样品的力学性能相对均匀,可用于定量研究天然缺陷对岩石力学性能的影响。本文制作了具有不同裂纹角度、长度和宽度的单断裂的3d打印样品,并用于单轴压缩试验。采用数字图像相关方法,可视化了单轴压缩试验过程中的应力应变分布,研究了预制裂缝特征(倾角、长度和宽度)对变形破坏过程的影响。建立了ABAQUS软件的扩展有限元法子程序,并将其用于单轴压缩仿真,并通过实验进行了验证。然后分析了力学参数(杨氏模量、泊松比、黏聚力)的影响
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引用次数: 1
Opportunities and challenges in CO2 geologic utilization and storage 二氧化碳地质利用和储存的机遇与挑战
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-05-05 DOI: 10.46690/ager.2023.06.01
Liwei Zhang, W. Nowak, S. Oladyshkin, Yan Wang, J. Cai
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引用次数: 3
Preparation and investigation of self-healing gel for mitigating circulation loss 缓解循环损失的自修复凝胶的制备与研究
IF 8.2 1区 地球科学 Q1 Earth and Planetary Sciences Pub Date : 2023-04-28 DOI: 10.46690/ager.2023.05.05
Ren Wang, Cheng Wang, Yifu Long, Jinsheng Sun, Luman Liu, Jianlong Wang
{"title":"Preparation and investigation of self-healing gel for mitigating circulation loss","authors":"Ren Wang, Cheng Wang, Yifu Long, Jinsheng Sun, Luman Liu, Jianlong Wang","doi":"10.46690/ager.2023.05.05","DOIUrl":"https://doi.org/10.46690/ager.2023.05.05","url":null,"abstract":"","PeriodicalId":36335,"journal":{"name":"Advances in Geo-Energy Research","volume":null,"pages":null},"PeriodicalIF":8.2,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42662151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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Advances in Geo-Energy Research
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