|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 基于格子Boltzmann方法的页岩气微观流动模拟显示文摘页岩中的主要孔隙类型是纳米孔隙,气体在纳米孔隙中的流动不同于在常规孔隙中的流动,其存在微尺度效应,因此基于连续介质假设的达西方程不再适用。由于页岩气藏一般处于高压环境,气体比较稠密,理想气体状态方程也不再适用。而格子Boltzmann方法是一种介观流动模拟方法,其不基于连续介质假设,适用于从滑移区到过渡区的气体流动模拟,并且能够考虑气体稠密性和非理想气体状态方程的影响。基于考虑努森层影响和微尺度效应的非理想气体格子Boltzmann方法,结合镜面反射格式与反弹格式组合的滑移边界条件,采用二维平板模型,研究了孔隙尺寸、压力和温度等因素对微尺度效应的影响,并对影响机理进行了分析。结果表明:努森数是微尺度气体流动的控制参数;在滑移区和自由分子流区,各因素对微尺度效应的影响较小,而在过渡区,各因素对微尺度效应的影响较大;通过表观渗透率与固有渗透率比值随努森数的变化关系,并与常用的页岩气藏表观渗透率计算模型进行对比,验证了目前常用页岩气藏表观渗透率计算模型的准确性。 | 姚军 赵建林 张敏 张磊 杨永飞 孙致学 孙海 | 2015 | 石油学报2015，36，10： | 34 |
| 2 | 现代油气渗流力学体系及其发展趋势显示文摘油气渗流是油气藏开采的科学核心问题,以连续介质假设和达西方程为基础的传统渗流力学在常规油气资源开发中发挥了重要作用.近年来,非常规油气藏成为油气行业勘探开发的主要阵地,其开发理论和技术尤其是渗流问题也成为学术界研究的热点问题.非常规油气藏其岩石多孔介质具有明显的多尺度特征,尺度差异达到6个数量级之多,而且采用大规模的水平井分段压裂开发模式,储层应力强烈作用.因此,传统的油气渗流理论已无法准确描述非常规油气藏的流动特征.实质上,非常规油气资源的开发过程是一个典型的多场作用下的多流动模式的多相流体(油气水)在多尺度多孔介质的流动过程.为此,本文提出了'多场作用下的多流动模式的多相流体在多尺度多孔介质中流动动力学体系'的现代渗流力学体系的概念,并从纳微尺度油气流动模拟、流动模拟的多尺度升级、非常规油气藏的宏观流动模拟、大尺度缝洞碳酸盐岩油藏的流动模拟以及油气渗流物理模拟等方面系统阐述了其研究现状及发展趋势. | 姚军 孙海 李爱芬 杨永飞 黄朝琴 王月英 张磊 寇建龙 谢昊君 赵建林 严侠 张庆福 任晓霞 韩文成 刘丕养 朱光普 宋文辉 隋宏光 安森友 王振 刘文正 张旭 李正 | 2018 | 科学通报2018，63，4： | 25 |
| 3 | Types and Characteristics of the Lower Silurian Shale Gas Reservoirs in and Around the Sichuan Basin显示文摘This study analyzed the characteristics and types of the Lower Silurian shale gas reservoirs in and around Sichuan Basin through field observations, slices, Ar-ion-beam milling, scanning electron microscopy, and x-ray diffraction analysis of 25 black shale outcrops and samples. Two main types of shale gas reservoirs were determined, i.e., fractures and pores. Fractures were classified into five categories, i.e., giant, large, medium, small, and micro, according to the features of the shale gas reservoirs, effect of fracture on gas accumulation, and fracture nature. Pore types include organic matter pores, mineral pores(mineral surface, intraparticle, interparticle, and corrosional pore), and nanofractures. The various fracture types, fracture scales, pore types, and pore sizes exert different controls over the gas storage and production capacity. Pores serve as a reservoir for gas storage and, the gas storage capacity can be determined using pores; fractures serve as pathways for gas migration, and gas production capacity can be determined using them. | NIE Haikuan ZHANG Jinchuan JIANG Shengling | 2015 | Acta Geologica Sinica(English Edition)2015，89，6： | 17 |
| 4 | 中国页岩气开发理论与技术研究进展显示文摘中国的页岩气田属于非常规气藏,采用体积压裂工程技术才可以实现有效开采.不过,页岩储层与一般储层的性质不同,纳米级孔隙大量分布,其孔隙和渗透率十分微小,同时还分布有微裂缝,气体在其中的流动具有解吸、扩散、滑脱和渗流等多种微观机理,并且呈现出基质-微裂缝-人工裂缝的跨尺度多流态流动.常规的油气开发理论与技术并不适用于页岩气藏,因此需要有针对性的研究,并建立页岩气开发的理论与技术,才能实现我国页岩气藏的高效地开发.从页岩气流动的基本规律出发,总结了页岩气流动的多流态-多尺度-多场耦合输运机理和渗流规律,归纳了考虑解吸-扩散-滑移-渗流的多尺度非线性渗流统一方程,给出了多尺度全流态图版.通过页岩气多级压裂水平井多区耦合非线性渗流理论、多场耦合非线性渗流理论,形成页岩气藏流场区域储量动用与开发动态变化规律,针对我国页岩气特点构建了页岩气产量递减模型.基于上述理论提出了开发设计方法,提出了我国储层分级评价及优选目标评价方法,并且建立了适合我国储层的分级评价及优选目标方法与指标,对中国页岩气压裂开发工艺适应性技术进展进行了归纳总结.在此基础上,对未来页岩气高效开发理论的发展方向进行了展望,以期对我国页岩气理论和技术研究提供指导. | 朱维耀 陈震 宋智勇 吴建发 李武广 岳明 | 2021 | 工程科学学报2021，43，10： | 9 |
| 5 | 基于均匀化理论的页岩基岩运移机制尺度升级研究显示文摘基岩孔隙是页岩气藏的主要储集空间.页岩有机质孔隙和非有机孔隙具有不同的赋存方式和传输机制:有机质孔隙存在吸附气、游离气两种赋存方式,无机质内仅存在游离气,气体在有机质孔隙存在吸附解吸和吸附气的表面扩散.传统的数值模拟方法未考虑页岩基岩内不同孔隙介质储集方式和运移机制的差异性,未考虑有机质分布结构特征的影响.本文基于均匀化理论建立了考虑页岩基岩有机质分布特征和相应运移机制的尺度升级数学模型,在小尺度模型中考虑有机质和无机质赋存方式和运移机制的差异性.数值模拟结果表明,传统上具有相同宏观运移参数的基岩,若其有机质分布不同,采用尺度升级后的宏观模型计算的压力变化和产量均不同,必须进行尺度升级才能实现复杂结构分布的页岩基岩模拟的准确性. | 孙海 姚军 YALCHIN Efendiev | 2017 | 中国科学:物理学、力学、天文学2017，47，11： | 6 |
| 6 | 页岩气藏的双重介质-离散裂缝模型显示文摘考虑页岩气藏开发中渗流的多尺度效应,提出了一个基于裂缝-孔隙双重介质的离散裂缝模型.在该模型中,基质、天然裂缝和人工压裂裂缝采用各自控制方程独立计算,不同介质之间通过流量交换相互关联.为分析模型可靠性,分别和基于渗透率粗化及压裂裂缝导流能力无穷大的模型对比.数值算例显示,伴随着网格细分,该模型与精确渗透率粗化模型具有相同计算精度,两者收敛速度均较快,但该模型易推广到多相流动问题,而等压模型对产量将有所高估.研究了地质参数和工艺参数对气井产量的影响规律.计算结果表明天然裂缝渗透率及基质孔隙扩散系数对产气速率有着重要影响,产气速率伴随着人工压裂裂缝导流能力、长度以及数目的增加而增加,但是增加幅度会逐步趋缓. | 卫鹏云 施安峰 王晓宏 周方奇 | 2015 | 力学季刊2015，36，2： | 5 |
| 7 | 页岩气藏水平井分段多簇压裂与流动数值模拟显示文摘为探究页岩气藏水平井压裂参数对产气量的影响,开展了分段多簇压裂与流动的数值模拟研究。裂缝扩展模型考虑应力阴影作用,利用位移不连续方法求解应力与位移不连续量。耦合井筒和裂缝中流体流动,并采用牛顿迭代法求解;考虑页岩气的黏性流、Knudsen扩散和吸附解吸,采用离散裂缝模型对压裂后页岩气的流动进行了求解。模拟结果表明:多簇裂缝同步扩展时裂缝间距越小,两侧裂缝偏离最大水平主地应力方向角度越大,中间裂缝宽度越小;随着水平井压裂段数增加,累积产气量增加,但增加幅度逐步降低;至于压裂段,三簇压裂比两簇压裂累积产气量高;裂缝间距越大时,累积产气量越高。 | 王伟 姚军 曾青冬 孙海 樊冬艳 | 2016 | 科学技术与工程2016，16，14： | 4 |
| 8 | 微裂缝对致密多孔介质中气体渗流的影响机制显示文摘采用考虑正则化过程的微尺度格子Boltzmann模型研究微裂缝对致密多孔介质中气体渗流的影响机制。首先采用漫反射滑移边界条件,并考虑正则化过程构建适用于高努森数下多孔介质中气体流动模拟的微尺度格子Boltzmann模型,基于该模型进行二维裂缝性致密多孔介质中的气体流动模拟,研究微裂缝对致密多孔介质中气体渗流的影响,并构建二维并联孔隙模型模拟揭示微裂缝对致密多孔介质气体渗流的影响机制。结果表明:微裂缝的存在能够明显提高致密多孔介质的渗透率,且连通性裂缝的影响更明显;随着压力的升高,微裂缝提高致密介质气体渗透率的作用增强,随着压力减小,基岩与裂缝中的气体流速差别减小,基岩对多孔介质渗透率的贡献增加,当压力极大或极小时,裂缝与基岩中平均流速比趋于定值,微裂缝的影响趋于稳定;微裂缝能够提高致密多孔介质渗透率的主要原因是在压降方向上微裂缝与基岩形成了并联高渗通道。 | 赵建林 姚军 张磊 杨永飞 孙海 孙致学 白玉湖 | 2018 | 中国石油大学学报(自然科学版)2018，42，1： | 4 |
| 9 | Stress redistribution in multi-stage hydraulic fracturing of horizontal wells in shales显示文摘Multi-stage hydraulic fracturing of horizontal wells is the main stimulation method in recovering gas from tight shale gas reservoirs, and stage spacing determination is one of the key issues in fracturing design. The initiation and propagation of hydraulic fractures will cause stress redistribution and may activate natural fractures in the reservoir. Due to the limitation of the analytical method in calculation of induced stresses, we propose a numerical method, which incorporates the interaction of hydraulic fractures and the wellbore, and analyzes the stress distribution in the reservoir under different stage spacing.Simulation results indicate the following:(1) The induced stress was overestimated from the analytical method because it did not take into account the interaction between hydraulic fractures and the horizontal wellbore.(2) The hydraulic fracture had a considerable effect on the redistribution of stresses in the direction of the horizontal wellbore in the reservoir. The stress in the direction perpendicular to the horizontal wellbore after hydraulic fracturing had a minor change compared with the original in situ stress.(3) Stress interferences among fractures were greatly connected with the stage spacing and the distance from the wellbore. When the fracture length was 200 m,and the stage spacing was 50 m, the stress redistribution due to stage fracturing may divert the original stress pattern, which might activate natural fractures so as to generate a complex fracture network. | Yi-Jin Zeng Xu Zhang Bao-Ping Zhang | 2015 | Petroleum Science2015，12，4： | 4 |
| 10 | 非常规油气开采中的微纳米力学问题研究进展显示文摘非常规油气资源储量丰富,开发前景广阔,其开采过程涉及一系列微纳米力学问题.聚合物、纳米流体驱油技术能够提高石油采收率,它们的微观驱替机理引起了人们的广泛关注.页岩气以吸附和游离态贮存于页岩微纳米孔隙中,在注入气的驱替下,流入宏观裂缝.本文结合课题组相关工作,综述了目前非常规油气开采中的微纳米力学问题研究进展.重点讨论了强化采油技术中粘弹性聚合物溶液和纳米流体的微观驱替机理和页岩气的吸附、注气驱替以及微流动机制,总结并展望了下一步研究工作的重点和方向. | 范竞存 余昊 陈杰 李向哲 王奉超 吴恒安 | 2017 | 中国科学技术大学学报2017，47，2： | 4 |
| 11 | 基于界面追踪的黏弹性流体微观流动模拟显示文摘特高含水期后期,地层剩余油主要以油膜、盲端残余油等形态存在,水驱开发效果变差,采用黏弹性流体驱替是当前提高采收率的有效方法.为探索黏弹性流体驱替残余油的水动力学机理,基于N-S方程模拟黏弹性流体在微孔道内流动.采用Oldroyd-B本构方程描述流体的黏弹性,运用相场方法实时追踪驱替过程中两相界面.分别研究壁面油膜在黏弹性流体驱替下的运动和变形,黏弹性流体对盲端残余油的驱替效果,并分析残余油微观受力状况.采用有限元方法对模型进行求解,并验证模型与求解的正确性.研究结果表明:黏弹性流体可以有效驱动壁面油膜运动,相同注入流量下,黏弹性流体作用于壁面油膜上的水平应力差远大于水;作用于油膜上的法向应力分布不均匀导致油膜发生较大变形.同时黏弹性流体在盲端内的波及边界更深,有利于引发盲端残余油的运动,提高残余油采收率.黏弹性流体驱替对水湿油藏开发增产效果更明显.该研究初步揭示了黏弹性流体驱替残余油的水动力机理,为油田三次采油提供有效指导. | 朱光普 姚军 孙海 张磊 李爱芬 | 2016 | 科学通报2016，61，36： | 4 |
| 12 | Investigation of shale gas microflow with the Lattice Boltzmann method显示文摘In contrast to conventional gas-bearing rocks,gas shale has extremely low permeability due to its nanoscale pore networks. Organic matter which is dispersed in the shale matrix makes gas flow characteristics more complex. The traditional Darcy's law is unable to estimate matrix permeability due to the particular flow mechanisms of shale gas. Transport mechanisms and influence factors are studied to describe gas transport in extremely tight shale. Then Lattice Boltzmann simulation is used to establish a way to estimate the matrix permeability numerically. The results show that net desorption, diffusion, and slip flow are very sensitive to the pore scale. Pore pressure also plays an important role in mass fluxes of gas.Temperature variations only cause small changes in mass fluxes. The Lattice Boltzmann method can be used to study the flow field in the micropore spaces and then provides numerical solutions even in complex pore structure models.Understanding the transport characteristics and establishing a way to estimate potential gas flow is very important to guide shale gas reserve estimation and recovery schemes. | Xiao-Ling Zhang Li-Zhi Xiao Long Guo Qing-Ming Xie | 2015 | Petroleum Science2015，12，1： | 3 |
| 13 | Numerical simulation of high-resolution azimuthal resistivity laterolog response in fractured reservoirs显示文摘The high-resolution azimuthal resistivity laterolog response in a fractured formation was numerically simulated using a three-dimensional finite element method.Simulation results show that the azimuthal resistivity is determined by fracture dipping as well as dipping direction,while the amplitude differences between deep and shallow laterolog resistivities are mainly controlled by the former.A linear relationship exists between the corrected apparent conductivities and fracture aperture.With the same fracture aperture,the deep and shallow laterolog resistivities present small values with negative separations for low-angle fractures,while azimuthal resistivities have large variations with positive separations for high-angle fractures that intersect the borehole.For dipping fractures,the variation of the azimuthal resistivity becomes larger when the fracture aperture increases.In addition,for high-angle fractures far from the borehole,a negative separation between the deep and shallow resistivities exists when fracture aperture is large as well as high resistivity contrast exists between bedrock and fracture fluid.The decreasing amplitude of dual laterolog resistivity can indicate the aperture of low-angle fractures,and the variation of the deep azimuthal resistivity can give information of the aperture of high-angle fractures and their position relative to the borehole. | Shao-Gui Deng Li Li Zhi-Qiang Li Xu-Quan He Yi-Ren Fan | 2015 | Petroleum Science2015，12，2： | 2 |
| 14 | 有机质孔隙对页岩气流动能力影响研究显示文摘页岩中存在有机质孔隙和无机质孔隙,目前页岩气表观渗透率模型忽略了孔隙类型、孔隙半径分布对气体流动能力的影响.本文基于页岩二维剖光扫描电镜图像数值重建页岩三维数字岩心,并提取孔隙相中轴拓扑结构.根据地质上对有机质孔隙空间分布、有机质孔隙和无机质孔隙半径分布的认识,在对应孔隙喉道位置,充填满足对应孔隙半径分布以及空间分布关系的有机质孔隙和无机质孔隙,建立3种不同有机质孔隙分布模式的页岩孔隙网络模型:有机质孔隙条带状分布、有机质孔隙连片分布、有机质孔隙分散在无机质孔隙中.有机质孔隙中气体流动考虑吸附解吸、表面扩散、黏性流、努森扩散,无机质孔隙中气体流动考虑黏性流、努森扩散,气体性质计算考虑真实气体效应以及在微纳米孔道中相态变化.结果表明,当有机质孔隙半径分布小于无机质孔隙半径分布,有机质孔隙成条带状分布模型气体流动能力最强,有机质孔隙连片分布模型气体流动能力最弱.当有机质孔隙半径分布大于无机质孔隙半径分布,有机质孔隙成条带状分布模型气体流动能力最强,有机质孔隙分散在无机质孔隙模型气体流动能力最弱.本文的研究对认识页岩气流动能力具有显著意义. | 姚军 宋文辉 李阳 孙海 杨永飞 张磊 | 2017 | 中国科学:物理学、力学、天文学2017，47，9： | 2 |
| 15 | Geological Conditions and Prospect Forecast of Shale Gas Formation in Qiangtang Basin, Qinghai-Tibet Plateau显示文摘The presence of shale gas has been confirmed in almost every marine shale distribution area in North America. Formation conditions of shale gas in China are the most favorable for marine, organic-rich shale as well. But there has been little research focusing on shale gas in Qiangtang Basin, Qinghai-Tibet Plateau, where a lot of Mesozoic marine shale formations developed. Based on the survey results of petroleum geology and comprehensive test analysis data for Qinghai-Tibet Plateau, for the first time, this paper discusses characteristics of sedimentary development, thickness distribution, geochemistry, reservoir and burial depth of organic-rich shale, and geological conditions for shale gas formation in Qiangtang Basin. There are four sets of marine shale strata in Qiangtang Basin including Upper Triassic Xiaochaka Formation(T3x), Middle Jurassic Buqu Formation(J2b), Xiali Formation(J2x) and Upper Jurassic Suowa Formation(J3s), the sedimentary types of which are mainly bathyal-basin facies, open platform-platform margin slope facies, lagoon and tidal-flat facies, as well as delta facies. By comparing it with the indicators of gas shale in the main U.S. basins, it was found that the four marine shale formations in Qiangtang Basin constitute a multi-layer distribution of organic-rich shale, featuring a high degree of thickness and low abundance of organic matter, high thermal evolution maturity, many kinds of brittle minerals, an equivalent content of quartz and clay minerals, a high content of feldspar and low porosity, which provide basic conditions for an accumulation of shale gas resources. Xiaochaka Formation shale is widely distributed, with big thickness and the best gas generating indicators. It is the main gas source layer. Xiali Formation shale is of intermediate thickness and coverage area, with relatively good gas generating indicators and moderate gas formation potential. Buqu Formation shale and Suowa Formation shale are of relatively large thickness, and covering a small area, with poor gas generating indicators, and limited gas formation potential. The shale gas geological resources and technically recoverable resources were estimated by using geologic analogy method, and the prospective areas and potentially favorable areas for Mesozoic marine shale gas in Qiangtang Basin are forecast and analyzed. It is relatively favorable in a tectonic setting and indication of oil and gas, shale maturity, sedimentary thickness and gypsumsalt beds, and in terms of mineral association for shale gas accumulation. But the challenge lies in overcoming the harsh natural conditions which contributes to great difficulties in ground engineering and exploration, and high exploration costs. | YU Yuanjiang ZOU Caineng DONG Dazhong WANG Shejiao LI Jianzhong YANG Hua LI Denghua LI Xinjing WANG Yuman HUANG Jinliang | 2014 | Acta Geologica Sinica(English Edition)2014，88，2： | 2 |
| 16 | Influence of gas transport mechanisms on the productivity of multi-stage fractured horizontal wells in shale gas reservoirs显示文摘In order to investigate the influence on shale gas well productivity caused by gas transport in nanometersize pores, a mathematical model of multi-stage fractured horizontal wells in shale gas reservoirs is built, which considers the influence of viscous flow, Knudsen diffusion,surface diffusion, and adsorption layer thickness. A discrete-fracture model is used to simplify the fracture modeling, and a finite element method is applied to solve the model. The numerical simulation results indicate that with a decrease in the intrinsic matrix permeability, Knudsen diffusion and surface diffusion contributions to production become large and cannot be ignored. The existence of an adsorption layer on the nanopore surfaces reduces the effective pore radius and the effective porosity, resulting in low production from fractured horizontal wells. With a decrease in the pore radius, considering the adsorption layer, the production reduction rate increases. When the pore radius is less than 10 nm, because of the combined impacts of Knudsen diffusion, surface diffusion, and adsorption layers, the production of multi-stage fractured horizontal wells increases with a decrease in the pore pressure. When the pore pressure is lower than 30 MPa, the rate of production increase becomes larger with a decrease in pore pressure. | Wei Wang Jun Yao Hai Sun Wen-Hui Song | 2015 | Petroleum Science2015，12，4： | 0 |
| 17 | 考虑天然裂缝下气井产量预测方法研究显示文摘裂缝发育程度是影响低渗致密气藏单井产量的主要原因之一,但是目前含天然裂缝的致密气藏单井产量预测方法均是建立在双重孔隙介质模型之上,该模型对储层等效过于理想,难以描述实际裂缝特征参数对其单井生产的影响。提出以地质静态裂缝描述为基础的蒙特卡罗法模拟储层等效随机裂缝;利用非结构Voronio网格生成方法自动生成离散裂缝网络,进一步根据质量守恒定理利用控制体有限差分法将基质和裂缝系统渗透率分开处理建立了裂缝性气藏直井产量预测数值计算格式,采用全隐式方法进行求解计算。研究结果表明:在无天然裂缝情况下,该方法预测产量结果与国外商业软件计算结果对比一致性好,验证了该方法预测致密裂缝性气藏产量的可靠性;气井产量与裂缝长度、数量间存在正相关性关系;裂缝与井之间夹角对气井产量影响显著,因此合理布井是高效开发裂缝性致密气藏的关键之一。 | 魏明强 段永刚 刘宏 李晓龙 李建秋 | 2014 | 科学技术与工程2014，22，25： | 0 |
| 18 | A graphene-enhanced high-barrier and fast-curing film for deep in situ condition preserved coring in coal seams显示文摘Scientific research on deep in situ resources is highly important to the theory and technology system construction for deep in-situ resource exploitation.To obtain high-condition preserved core samples,it is vital to maintain the original material,humidity and luminous flux information inside the core.Therefore,this study proposes a research and development strategy for a high-toughness and highbarrier sealing film based on the molecular structure design and filler synergistic enhancement via a deep solid-state sealing film using in situ substance preservation(ISP),in situ moisture preservation(IMP)and in situ light preservation(ILP)coring principles.A graphene/epoxy composite sealing film with a high barrier,high strength and high toughness was developed.The oxygen permeability of the film was 0.23 cm^(3)/(m^(2)·d),the water vapor permeability was 1.26 g/(m^(2)·d),and the light transmittance was 0.The tensile strength reached 15.4 MPa,and the toughness was 5242.9 kJ/m^(3).The results from the film substance and moisture preservation performance verification experiments showed that the sealing film had an excellent sealing effect on small molecules,such as water,alkanes and even ions,which further verified that the sealing film greatly contributed to the maintenance and preservation of deep in-situ resource reserves and abundance. | Dongsheng Yang Zhiyu Zhao Yifan Wu Liangyu Zhu Jingli Lu Tao Liu Heping Xie | 2023 | International Journal of Mining Science and Technology2023，33，11： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员