Petroleum最新文献_第4页

A two-organoclay formulation approach for enhanced performance of oil-based drilling fluids 提高油基钻井液性能的双有机粘土配方方法

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2026-02-01 Epub Date: 2026-01-02 DOI: 10.1016/j.petlm.2025.12.003

Ali Mahmoud, Rahul Gajbhiye, Salaheldin Elkatatny

High-pressure and high-temperature (HPHT) drilling environments challenge the stability and efficiency of conventional oil-based drilling fluids (OBDFs). This study introduces a novel dual-organoclay (OC) formulation combining Claytone-II and Claytone-IMG 400 at a 1:1 ratio, designed to enhance OBDF performance under HPHT conditions. The selected OCs possess distinct mineralogies: one is rich in anorthite, while the other is dominated by montmorillonite, offering complementary properties. Comprehensive characterization using X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), and particle size distribution (PSD) analysis revealed significant structural and compositional differences that underpin the observed synergy.

Experimental evaluation showed that the OC mixture outperformed individual OCs and a commercial benchmark (MC-TONE) in critical areas including rheology, filtration, and sag stability. Under 275 °F and 500 psi conditions, the dual-OC system improved plastic viscosity by 15.5%, yield point by 33%, and reduced filtrate volume and filter cake thickness by 16.5% and 11.5%, respectively. These enhancements contribute to better cuttings transport, reduced fluid loss, and improved wellbore stability.

The approach offers a cost-neutral yet performance-enhancing solution using commercially available OCs. It holds promise for extending OBDF applicability in HPHT wells while supporting safer, more efficient, and environmentally responsible drilling operations.

高压高温（HPHT）钻井环境对常规油基钻井液（OBDFs）的稳定性和效率提出了挑战。本研究介绍了一种新型双有机粘土（OC）配方，该配方将Claytone-II和Claytone-IMG 400以1:1的比例组合在一起，旨在提高高温条件下OBDF的性能。所选的OCs具有不同的矿物学：一种富含钙长石，而另一种以蒙脱石为主，具有互补的特性。通过x射线衍射（XRD）、x射线荧光（XRF）、扫描电镜（SEM）和粒度分布（PSD）分析，综合表征发现了支撑观察到的协同作用的显著结构和成分差异。实验评估表明，在流变性、过滤性和沉降稳定性等关键领域，OC混合物的性能优于单个OC和商业基准（MC-TONE）。在275°F和500 psi条件下，双oc体系将塑料粘度提高了15.5%，屈服点提高了33%，滤液体积和滤饼厚度分别减少了16.5%和11.5%。这些改进有助于更好地输送岩屑，减少流体漏失，提高井筒稳定性。该方法提供了一种成本中立但性能增强的解决方案，使用市售的oc。它有望扩大OBDF在高温高压井中的适用性，同时支持更安全、更高效、更环保的钻井作业。

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引用次数: 0

Research on the influence of silica fume on the long-term strength development of lightweight cement 硅灰对轻质水泥长期强度发展影响的研究

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2026-02-01 Epub Date: 2025-12-18 DOI: 10.1016/j.petlm.2025.12.002

Haodong Li , Chengwen Wang , Dingye Li , Wenjian Yue , Feng Zhao , Yuanbo Xia

Silica fume (SF) is commonly added to lightweight cement slurry (LWCS) to enhance strength and stability due to its nanoscale properties. However, the long-term strength development of SF-modified cement remains unclear. This study explores the effect of SF on the long-term strength of LWCS cured at 75 °C, 90 °C, and 105 °C, using compressive strength tests and microstructural analyses (XRD, SEM, EDS, TGA). SF initially improves strength through pozzolanic reactions, but over time, the C–S–H gel formed during hydration becomes more porous and looser. The addition of SF promotes the transformation of the C–S–H gel from a high Ca/Si ratio to a lower one, with rapid CH consumption accelerating porosity development. This weakens the bond between cement and hollow glass microspheres (HGMs), causing microcracks from stress differentials. These changes lead to internal bond deterioration and up to 56.76% strength reduction. While SF enhances early strength, it negatively affects long-term strength, raising the risk of cementing failure in oil and gas wells. Future research should focus on addressing long-term strength decline at higher temperatures and identifying alternative materials to mitigate this issue.

硅粉（SF）通常被添加到轻质水泥浆（LWCS）中，由于其纳米级特性，可以提高强度和稳定性。然而，sf改性水泥的长期强度发展仍不清楚。本研究通过抗压强度测试和微观结构分析（XRD， SEM， EDS， TGA），探讨了SF对75°C， 90°C和105°C固化LWCS长期强度的影响。SF最初通过火山灰反应提高强度，但随着时间的推移，水化过程中形成的C-S-H凝胶变得更加多孔和松散。SF的加入促进了C-S-H凝胶由高Ca/Si比向低Ca/Si比转变，CH的快速消耗加速了孔隙度的发育。这削弱了水泥与中空玻璃微球（HGMs）之间的结合，导致应力差产生微裂缝。这些变化导致内部结合恶化，强度降低达56.76%。虽然SF提高了早期强度，但对长期强度产生了负面影响，增加了油气井固井失败的风险。未来的研究应侧重于解决高温下的长期强度下降问题，并确定替代材料来缓解这一问题。

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引用次数: 0

Production optimization in shale formations: Focus on proppant delivery schedules and mitigation of fracture conductivity damage 页岩地层的生产优化：重点关注支撑剂的投放计划和减少裂缝导流性损害

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2026-02-01 Epub Date: 2025-12-13 DOI: 10.1016/j.petlm.2025.12.001

Ruud Weijermars

This study presents recent advances in modeling capacity and provides optimization guidelines for key operational parameters controlling well performance, using real well data. A new Gaussian solution method can both accurately forecast well rates prior to drilling and history match actual well performance after completion once early production data become available. Unlike other history-matching tools, excellent matches are achieved with daily production data spanning just a few months. The study also addresses key challenges in achieving precision in hydraulic fracturing and horizontal well design, emphasizing unresolved subsurface heterogeneity, variability in treatment quality, and modeling tool limitations. Advanced analytical methods, such as the Gaussian Production Forecasting (GPT) method, offer improved accuracy and computational efficiency for production predictions. Empirical data from the Eagle Ford and Wolfcamp formations demonstrate significant performance gains over the past decade, driven by optimized fracture spacing, increased lateral lengths, and enhanced proppant usage. However, performance gaps persist due to poor proppant conductivity, closure stress impacts, and proppant transport inefficiencies. This study highlights the critical impact of fracture conductivity damage on shale well performance, as revealed by Gaussian well performance curves derived from historical data. The findings emphasize the need for integrating advanced modeling tools, optimizing proppant delivery strategies, and improving transport simulations to achieve sustained productivity gains in shale reservoirs.

该研究展示了建模能力的最新进展，并利用实际井数据为控制井性能的关键操作参数提供了优化指导。一种新的高斯解方法既可以在钻井前准确预测井速，又可以在获得早期生产数据后，在完井后与实际井况匹配。与其他历史匹配工具不同，只需几个月的日常生产数据就可以实现出色的匹配。该研究还解决了实现水力压裂和水平井设计精度的关键挑战，强调了未解决的地下非均质性、处理质量的可变性以及建模工具的局限性。先进的分析方法，如高斯生产预测（GPT）方法，提高了生产预测的准确性和计算效率。来自Eagle Ford和Wolfcamp地层的经验数据表明，在过去十年中，由于优化了裂缝间距、增加了水平段长度和增加了支撑剂的使用，该油藏的性能得到了显著提高。然而，由于支撑剂导流性差、闭合应力影响和支撑剂输送效率低下，性能差距仍然存在。该研究强调了裂缝导流性损害对页岩井性能的关键影响，正如由历史数据导出的高斯井动态曲线所揭示的那样。研究结果强调，需要集成先进的建模工具，优化支撑剂输送策略，改进输送模拟，以实现页岩储层持续的产能提高。

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引用次数: 0

Nanoparticles and nanocomposites in enhanced oil recovery, asphaltene inhibition, and carbon dioxide sequestration: Mechanisms and prospects 纳米颗粒和纳米复合材料在提高采收率、沥青烯抑制和二氧化碳封存中的应用：机制和前景

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2026-02-01 Epub Date: 2026-01-31 DOI: 10.1016/j.petlm.2026.01.006

Ehsan Jafarbeigi , Amir H. Mohammadi

This study provides a comprehensive review of nano-particles and nano-composites applications in oilfield, focusing on their roles in enhanced oil recovery (EOR), asphaltene deposition mitigation, and CO₂ storage. Building on prior research, it identifies the most promising nanotechnology-based approaches and outlines a detailed roadmap for future breakthroughs. Thus, in this regard, the review evaluates 21 nanomaterials, including Al₂O₃ (γ/α phases), SiO₂, MgO, CuO, ZrO₂, NiO, graphene oxide (GO), SnO, CaCO₃, CeO₂, TiO₂, carbon nanotubes (CNT), and hybrid composites (e.g., SiO₂/γ-Al₂O₃, TiO₂/MgO, ZnO/γ-Al₂O₃, ZnO/CuO, ZnO/ZrO₂, TiO₂/SiO₂, TiO₂/ZnO, Fe₃O₄/SiO₂, and CuO/Al₂O₃), demonstrating their superior performance in improving operational efficiency. The findings demonstrate that nanotechnology offers superior performance, highlighting its potential to revolutionize the oil industry by improving oil production efficiency. On the other hand, nano-particles such as ZnO, Al₂O₃, SiO₂, and TiO₂ stand out due to their strong adsorption capacity, thermal stability, and ability to tune deposition mechanisms. Also, notably, nano-composites (such as SiO₂+Al₂O₃ and Fe₂O₃+Al₂O₃) excel in asphaltene inhibition due to synergistic nano-particle-hydrocarbon interactions. The results also show that nano-composites (TiO₂@SiO₂) increase the integrity of CO₂ storage. Generally, this study highlights key challenges hindering large-scale implementation and serves as a critical resource for researchers advancing nanotechnology in petroleum engineering.

本研究综述了纳米颗粒和纳米复合材料在油田中的应用，重点介绍了纳米颗粒和纳米复合材料在提高采收率（EOR）、减缓沥青质沉积和二氧化碳储存方面的作用。在先前研究的基础上，它确定了最有前途的基于纳米技术的方法，并概述了未来突破的详细路线图。因此，本文评价了21种纳米材料，包括Al2O3 （γ/α相）、SiO2、MgO、CuO、ZrO2、NiO、氧化石墨烯（GO）、SnO、CaCO3、CeO2、TiO2、碳纳米管（CNT）和混合复合材料（如SiO2/γ-Al2O3、TiO2/MgO、ZnO/γ-Al2O3、ZnO/CuO、ZnO/ZrO2、TiO2/SiO2、TiO2/ZnO、Fe3O4/SiO2和CuO/Al2O3），展示了它们在提高操作效率方面的卓越性能。研究结果表明，纳米技术提供了卓越的性能，突出了其通过提高石油生产效率来彻底改变石油行业的潜力。另一方面，纳米颗粒如ZnO、Al2O3、SiO2和TiO2因其强大的吸附能力、热稳定性和调节沉积机制的能力而脱颖而出。此外，值得注意的是，纳米复合材料（如SiO2+Al2O3和Fe2O3+Al2O3）由于协同的纳米颗粒-碳氢化合物相互作用，在沥青质抑制方面表现优异。结果还表明，纳米复合材料（TiO2@SiO2）提高了CO2储存的完整性。总的来说，这项研究突出了阻碍大规模实施的关键挑战，并为研究人员在石油工程中推进纳米技术提供了重要资源。

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引用次数: 0

CCUS wellbore integrity risk assessment and management based on game theory combination weighting-DHHFLOWLAD 基于博弈论组合加权的CCUS井筒完整性风险评估与管理——dhhflowlad

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2026-02-01 Epub Date: 2025-11-20 DOI: 10.1016/j.petlm.2025.11.003

Bing Qin , Wenjing Duan , Suhong Nan , Bing Liang , Zhanshan Shi , Jianfeng Hao

In response to the increasing risk of well integrity failure during carbon dioxide capture, utilization and storage (CCUS), a multi-index evaluation and recommendation model based on the game theory combination-authority-DHHFLOWLAD was proposed to achieve the risk assessment of well integrity in CCUS and the selection of risky well treatment solutions in the same model. Through literature research, reference to relevant safety standards and norms, and expert inquiries, the Bow-tie diagram of wellbore integrity failure was established, the wellbore failure mechanism was analyzed, and the dual-layer hesitation fuzzy language (DHHFL) characteristics were combined to screen evaluation indicators to construct the CCUS wellbore integrity risk evaluation index system. Experts were invited to use DHHFL data for complex language evaluation and expected value transformation. Game theory combined analytic hierarchy process (AHP) and entropy weight method were used to complete the optimization of comprehensive weights. The ordered weighted logarithmic mean distance (OWLAD) operator was introduced to aggregate the distance measurement between the well shaft and the scheme by combining the optimization weights of different indicators. Complete the recommendation of well risk assessment and management recommendations, and provide more accurate, scientific and practical guidance for CCUS well integrity evaluation and management.

针对二氧化碳捕集利用与封存（CCUS）过程中井完整性失效风险的增加，提出了基于博弈论组合-权威- dhhflowlad的多指标评价推荐模型，实现了CCUS井完整性风险评估，并在同一模型下选择风险井治理方案。通过文献研究，参考相关安全标准规范，结合专家咨询，建立井筒完整性破坏的蝴蝶结图，分析井筒破坏机理，结合双层犹豫模糊语言（DHHFL）特征筛选评价指标，构建CCUS井筒完整性风险评价指标体系。邀请专家使用DHHFL数据进行复杂语言评价和期望值转换。采用博弈论结合层次分析法（AHP）和熵权法完成综合权重的优化。引入有序加权对数平均距离算子（OWLAD），结合不同指标的优化权值，对井井与方案之间的距离测量值进行汇总。完成井风险评估和管理建议的推荐，为CCUS井完整性评估和管理提供更加准确、科学和实用的指导。

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引用次数: 0

Shale oil flow simulation considering laminar characteristics and desorption of ad-/absorbed oil from kerogen 考虑层流特征和干酪根脱吸的页岩油流动模拟

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2026-02-01 Epub Date: 2025-12-05 DOI: 10.1016/j.petlm.2025.11.007

Xueqiang Guo , Mingzhe Dong , Qian Sang , Nana Song , Ke Wang

Laminated continental shale oil reservoirs have the potential for commercial development. In this paper, a new simulation method for interlayer and intra-layer coupled flow in laminated shale reservoirs is established. This method simulates the structural characteristics of shale-sandstone longitudinal interlayer distribution by dual-porositysystem, and combines with chemical reaction model to characterize the desorption process of ad-/absorbed oil from kerogen in shale layers. Then, the intra-layer and interlayer interfacial flow mechanism in the depletion process is investigated, and the contribution of interfacial flow and desorption is analyzed. The results indicate that the sandstone layer is the main oil-producing layer, accounting for over 90% of the total oil production. However, the interlayer flow and kerogen desorption in the shale layers make significant contributions, resulting in an enhancement of 13.41% and 42.64% in the total oil production, respectively. Additionally, the desorption of ad-/absorbed oil from kerogen enhances the energy of both the shale and sandstone layers, significantly increasing their production. Moreover, higher pressure drawdown, total organic carbon (TOC) content, desorption rate, and horizontal permeability of sandstone layers are advantageous for the exploitation of shale oil.

层状陆相页岩油藏具有商业开发潜力。本文建立了层状页岩储层层间和层内耦合流动的一种新的模拟方法。该方法利用双孔隙系统模拟了页岩-砂岩纵向层间分布的结构特征，并结合化学反应模型表征了页岩层中干酪根脱附油的脱附过程。然后，研究了层内和层间的界面流动机理，并分析了界面流动和脱附的贡献。结果表明，砂岩层为主要产油层，占总产油量的90%以上。而页岩层间流动和干酪根解吸作用对总产油量的贡献较大，分别提高了13.41%和42.64%。此外，从干酪根中脱附/吸收的油提高了页岩和砂岩层的能量，显著提高了它们的产量。较高的压降、总有机碳（TOC）含量、解吸速率和水平渗透率有利于页岩油的开发。

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引用次数: 0

Evolution law of physical parameters and hydrate reservoir productivity under multi-stage depressurization 多级降压下物性参数与水合物储层产能演化规律

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2025-12-01 Epub Date: 2025-10-21 DOI: 10.1016/j.petlm.2025.10.002

Na Wei , Chao Zhang , Li Zhou , Shenghui Zhang , Shouwei Zhou , Liehui Zhang , Jinzhou Zhao , Richard B.Coffin , Bjørn Kvamme

In the process of gas hydrate depressurization production, the reasonable depressurization rhythm and depressurization amplitude have significant impact on improving production and reducing engineering geological risks. Considering the basic stability of the reservoir, this study constructs mathematical models of gas hydrate decomposition kinetics, multiphase flow in the reservoir, and the disintegration and migration of rock matrix particles containing hydrates. Based on actual data from the first trial production in Japan's Nankai Trough, the validity of the model has been verified. The study analyzed changes in reservoir physical properties and productivity under multi-stage depressurization conditions. The influence of different pressure reduction rhythms on productivity changes and the evolution laws of porosity, permeability and saturation over time and space were discussed. The research disclosed the multi-stage depressurization mode can modulate the decomposition rate and sand production rate of natural gas hydrates through the progressive reduction of reservoir pressure, guaranteeing production capacity while attaining sand production control and minimizing the risk of blockage, thereby striking a balance between production efficiency and sustainability. This study provides a crucial theoretical basis for the design optimization of natural gas hydrate depressurization extraction schemes. The research outcomes not only guide the parameter configuration optimization during depressurization but also offer scientific support for establishing production prediction models.

在天然气水合物降压生产过程中，合理的降压节奏和降压幅度对提高产量和降低工程地质风险具有重要影响。从储层的基本稳定性出发，构建了天然气水合物分解动力学、储层多相流动、含水合物岩石基质颗粒崩解迁移的数学模型。基于日本南开海槽首次试产的实际数据，验证了该模型的有效性。研究分析了多级降压条件下储层物性和产能的变化。讨论了不同减压节奏对产能变化的影响以及孔隙度、渗透率和饱和度随时间和空间的演化规律。研究表明，多级降压模式可以通过逐步降低储层压力来调节天然气水合物的分解速率和出砂速率，在保证产能的同时实现出砂控制，最大限度地降低堵塞风险，从而在生产效率和可持续性之间取得平衡。该研究为天然气水合物减压提取方案的设计优化提供了重要的理论依据。研究成果不仅指导了降压过程中参数配置的优化，而且为建立产量预测模型提供了科学依据。

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引用次数: 0

Application of organic cross-linked gel system for mitigating CO2 leakage from high temperature reservoirs 有机交联凝胶体系在减少高温油藏CO2泄漏中的应用

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2025-12-01 Epub Date: 2025-11-14 DOI: 10.1016/j.petlm.2025.11.001

Mohd. Shahnawaz Alam, Rishabh Tripathi, Sandeep D. Kulkarni

This study aims to mitigate CO₂ leakage in high-temperature reservoirs using an organic cross-linked gel system. The engineered fluid system was evaluated by a quantified rheological methodology and pore-plugging analysis. A sulfonated hydrolyzed polyacrylamide polymer and organic crosslinkers, hydroquinone and hexamethylenetetramine, were utilized for forming the fluid gel systems. The pressure cell assembly has been employed for the gel analysis at an elevated temperature of 110 °C under a pressurized CO₂ environment. The high-temperature viscosity vs. aging time data acquired under continuous shear conditions (

\dot{γ} =

50 s⁻¹) was ingeniously categorized into three regimes: (1) an induction period characterized by a lower linear slope of dμ/dt = 15–50 mPa·s/h; (2) a ‘non-linear’ transition regime; (3) a rapid cross-linking period characterized by a higher linear slope, i.e. dμ/dt ≥ 350 mPa·s/h. The ‘gelation time’, defined as the point of initiation of the rapid-crosslinking period, was successfully modelled for variations in polymer concentration utilizing first-order kinetics. The new outcomes of the high-temperature rheological investigation under the pressurized CO₂ environment were compared with the traditional bottle-testing approach and oscillatory rheological studies. The core flooding results showed excellent plugging efficiency (>99%) for both sub-critical and super-critical CO₂ injections beyond the ‘gelation time’ at 110 °C.

该研究旨在利用有机交联凝胶体系减少高温油藏中的二氧化碳泄漏。通过定量流变学方法和孔隙堵塞分析对工程流体体系进行了评估。一种磺化水解聚丙烯酰胺聚合物和有机交联剂对苯二酚和六亚甲基四胺被用于形成流体凝胶体系。压力电池组件已用于在加压CO2环境下110°C高温下的凝胶分析。在连续剪切条件下（γ˙50 s−1）获得的高温黏度与老化时间的数据，可分为三个阶段：(1)诱导期的线性斜率较低，为dμ/dt = 15 ~ 50 mPa·s/h；(2)“非线性”过渡机制；(3)快速交联期，线性斜率较大，即dμ/dt≥350 mPa·s/h。“凝胶时间”被定义为快速交联期的起始点，利用一级动力学成功地模拟了聚合物浓度的变化。将加压CO2环境下高温流变学研究的新成果与传统的瓶试方法和振荡流变学研究进行了比较。岩心驱油结果显示，在110°C的“胶凝时间”之后，亚临界和超临界CO2注入都具有优异的封堵效率（>99%）。

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引用次数: 0

A novel injectivity decline prediction model for waterflooding with analytical solutions and field applications 一种新的水驱注入能力下降预测模型及其解析解和现场应用

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2025-12-01 Epub Date: 2025-10-27 DOI: 10.1016/j.petlm.2025.10.001

Huifeng Liu , Yuri Osipov , Zebo Yuan , Siqing Xu , Jorge Costa Gomes , Zhangxin Chen

Well injectivity decline during waterflooding is primarily attributed to retention of injected particles within pores, subsequently blocking flow channels in near-wellbore regions. Developing a predictive model to describe this problem holds significant value as it can inform the development of strategies aimed at preventing or mitigating such damage. Previous research has typically assumed a linear suspension flow or a constant filtration coefficient, which does not represent the near-wellbore suspension flow very well. In this paper, an analytical model for the radial suspension transport in porous media is derived based on the Langmuirian blocking filtration mechanism. Considering the dimensionless distance from the wellbore as a small parameter, we attain the analytical solution through an asymptotic expansion. To provide a basis for comparison, we also obtain numerical solutions using Shampine's code, which is based on the explicit central finite difference method. Comparison of the analytical and numerical solutions shows that their difference errors remain below 5% under waterflooding conditions. Based on the analytical solution for retained particle concentration, expressions for injection pressure, damage factor and damaged zone radius are also derived and are also expressed explicitly. In the end, we discuss two practical applications of our model: evaluation of existing acidizing jobs and designing new acidizing jobs, based on real field data from Tarim Basin, western China. The results indicate our model is practical in field operations.

在水驱过程中，井的注入能力下降主要是由于注入的颗粒滞留在孔隙中，从而阻塞了近井区域的流动通道。开发一个预测模型来描述这个问题具有重要的价值，因为它可以为旨在预防或减轻此类损害的策略的制定提供信息。以往的研究通常假设线性悬浮流动或恒定的过滤系数，这并不能很好地代表近井悬浮流动。本文基于朗穆里安阻塞过滤机制，推导了多孔介质中径向悬浮输运的解析模型。考虑到与井筒的无量纲距离是一个小参数，我们通过渐近展开得到解析解。为了提供比较依据，我们还使用基于显式中心有限差分法的Shampine代码获得了数值解。解析解与数值解的比较表明，在水驱条件下，两者的差值误差保持在5%以下。基于颗粒残留浓度解析解，导出了注入压力、损伤因子和损伤区半径的表达式，并给出了明确的表达式。最后，以塔里木盆地的实际现场数据为基础，讨论了该模型的两个实际应用：对现有酸化作业的评价和设计新的酸化作业。结果表明，该模型在野外作业中是实用的。

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引用次数: 0

Investigating the phase behavior of methane, ethane and their binary mixture confined in a 5 nm slit-like-pore with different wall types: Monte Carlo simulation study 研究甲烷、乙烷及其二元混合物在5 nm不同壁型的裂隙状孔中的相行为：蒙特卡罗模拟研究

IF 3.5 Q2 ENERGY & FUELS

Petroleum

Pub Date : 2025-12-01 Epub Date: 2025-10-29 DOI: 10.1016/j.petlm.2025.10.004

Raafat Aborafia, Amir Hossein Saeedi Dehaghani

This study investigates the phase behavior of methane, ethane, and their binary mixture in both bulk and 5 nm slit-like pores with silica, anhydrite, calcite, dolomite, and montmorillonite walls using grand canonical Monte Carlo simulation (GCMC). The results show that vapor densities increase and, liquid densities decrease with the reduction of the pore width for both pure components and binary mixtures. The critical pressure and temperature decrease significantly in confined systems compared to bulk systems, with the rate of decrease varying depending on the type of surface. The response of critical density to surface type is distinct, and the critical density can be higher or lower than that in bulk systems. Furthermore, the dew point pressure of the confined binary mixture between two surfaces of silica, anhydrite, calcite, dolomite, and montmorillonite is higher than its value in bulk systems, while the bubble point pressure in confined systems can be lower, equal, or more than its value in bulk systems, depending on the pore surface and temperature.

本研究利用大规范蒙特卡罗模拟（GCMC）研究了甲烷、乙烷及其二元混合物在具有二氧化硅、硬石膏、方解石、白云石和蒙脱石壁的块状和5nm缝状孔隙中的相行为。结果表明：随着孔隙宽度的减小，纯组分和二元混合物的蒸汽密度增大，液体密度减小；与散装系统相比，密闭系统的临界压力和温度显著降低，降低的速率取决于表面的类型。临界密度对表面类型的响应是明显的，临界密度可以高于或低于块体体系。此外，二氧化硅、硬石膏、方解石、白云石和蒙脱石两种表面之间的密闭二元混合物的露点压力高于体积体系中的露点压力，而根据孔隙表面和温度的不同，密闭体系中的气泡点压力可能低于、等于或大于体积体系中的气泡点压力。

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