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Mining Science and Technology 2010年第5期20卷 782-788页

作者： LIU Yaping CHEN Yueming bai yuhu LI Shuxia School of Petroleum Engineering China University of Petroleum Dongying 257006 China Globe Research Center Exploration and Production Research Institute of SINOPEC Beijing 100083 China Technology Research Department CNOOC Research Center Beijing 100027 China

In order to apply physical simulation results to natural gas hydrate reservoir parameters to provide a theoretical framework for the design of a development plan,an analytical equation method was used to obtain the similarity criteria of natural gas hydrate reservoir development by physical simulation,based on a mathematical model of natural gas hydrate development.Given the approach of numerical simulation,a sensitivity analysis for all parameters was carried out,which specifically demonstrated that initial temperature is the most important parameter.Parameters of thermal conductivity coefficients are not necessary for conducting the NGH dissociation process,which will fundamentally simplify the design and establishment of the model.The analysis provides a sound theoretical basis and design principles for particular similarity.

关键词：天然气水合物藏物理模拟相似理论数值模拟方法数学模型敏感性分析储层参数相似准则

Numerical simulation on gas production from a hydrate reservoir underlain by a free gas zone

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Chinese Science Bulletin 2009年第5期54卷 865-872页

作者： bai yuhu LI QingPing LI XiangFang DU Yan Technology Research Department China National Offshore Oil Corporation Research Center Beijing 100027 China Faculty of Petroleum Engineering China University of Petroleum Beijing 102249 China Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China

Physical and mathematical models of gas production by depressurization from a hydrate reservoir underlain by a free gas zone are established. The mathematical model can interpret the effects of the flow of multiphase fluids, the process of hydrate dissociation, ice-water phase transition, the variation of permeability, the convection and conduction on hydrate dissociation and gas and water production. The evolutions of temperature, pressure, and saturations in the hydrate and free gas zones are eluci-dated during gas production. The variation of some parameters, such as gas and water rates, with time is presented. The results show that the overlying hydrate zone can supply a certain amount of gas to improve the output of a production well and evidently prolong the lifespan of a gas reservoir.

关键词：游离气带数值模拟水合物气藏数学模型多相流体

Experimental simulation of gas hydrate decomposition in porous sediment

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Science China Earth Sciences 2013年第4期56卷 588-593页

作者： YU XiChong LI Gang LI QingPing LI XiaoSen ZHANG Yu PANG WeiXin bai yuhu CNOOC Research Institute Guangzhou Institute of Energy Conversion

Gas hydrate decomposition in sediments involves complicated multiphase flow and heat and mass transfer processes because of heat absorption by solid hydrates. Factors affecting gas hydrate decomposition in sediments include sediment type, mineral composition, pore size distribution, particle size, pore water composition, hydrate saturation distribution, initial formation pressure and temperature and cement characteristics. In this paper, experimental simulations of gas hydrate decomposition are carried out on an artificial core to investigate the effects of initial pressure and temperature, particle size and pore size. The experiments show that the characteristics of gas hydrate decomposition in sediments differ completely from those in a pure water system. The decomposition rate of hydrate sediments increases with the initial pressure increasing and decreasing temperatures. Furthermore, the decomposition rate of hydrate sediments decreases with decreasing particle size and increasing pore size.

关键词：天然气水合物沉积物类型分解速率实验模拟多孔传热传质过程初始压力矿物组成

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LS致密气田井筒积液监测方法及治理对策

石油化工应用 2024年第4期43卷 27-31页

作者：李津白玉湖赵军盖少华吴佳琦中海油研究总院有限责任公司北京100028

位于鄂尔多斯盆地东缘的LS致密气田,由于气井产能低,产量递减快,且储层含水,使得井筒积液问题成为限制该气田产能释放的主要原因之一。目前,现场排液采气措施以泡排为主,对于泡排增产量的统计发现,泡排效果差异较大,部分气井措施后增产... 详细信息

位于鄂尔多斯盆地东缘的LS致密气田,由于气井产能低,产量递减快,且储层含水,使得井筒积液问题成为限制该气田产能释放的主要原因之一。目前,现场排液采气措施以泡排为主,对于泡排增产量的统计发现,泡排效果差异较大,部分气井措施后增产效果差且存在措施滞后的情况。为对气井积液进行提前预警,本文通过“井口气水比”、“油套压差与产气量之比”两个指标进行动态分析,并建立了井筒积液高度计算方法与程序,为现场判别积液信号并及时采取排液采气措施提供了依据。为了优化排液采气措施的实施,通过气井生产系统节点分析,结合井筒多相流压力计算、临界携液模型,分析了气井生产的临界条件,提出了不同状态气井的排液采气措施建议。对于现场排液采气措施决策具有一定的指导作用。

关键词：致密气田井筒积液动态监测临界携液节点分析排液采气措施

Stability analysis of the moving interface in piston- and non-piston-like displacements

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Acta Mechanica Sinica 2008年第4期24卷 381-385页

作者： yuhu bai Jifu Zhou Qingping Li Technology Research Department CNOOC Research Center Beijing 100027 China Division of Engineering Sciences Institute of MechanicsChinese Academy of Sciences Beijing 100190 China

From the macroscopic point of view, expressions involving reservoir and operational parameters are established for investigating the stability of moving interface in piston- and non-piston-like displacements. In the case of axisymmetrical piston-like displacement, the stability is related to the moving interface position and water to oil mobility ratio. The capillary effect on the stability of moving interface depends on whether or not the moving interface is already stable and correlates with the wettability of the reservoir rock. In the case of non-piston-like displacement, the stability of the front is governed by both the relative permeability and the mobility ratio.

关键词： Piston-like displacement · Non-piston-like displacement · Two-phase percolation · Moving interface ·Stability analysis

Sensitivity analysis of dimensionless parameters for physical simulation of water-flooding reservoir

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Science China(Technological Sciences) 2005年第4期48卷 441-453页

作者： bai yuhu LI Jiachun ZHOU Jifu Division of Engineering Sciences Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China Division of Engineering Sciences Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China Division of Engineering Sciences Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

A numerical approach to optimize dimensionless parameters of water-flooding porous media flows is proposed based on the analysis of the sensitivity factor defined as the variation ration of a target function with respect to the variation of dimensionless parameters. A complete set of scaling criteria for water-flooding reservoir of five-spot well pattern case is derived from the 3-D governing equations, involving the gravitational force, the capillary force and the compressibility of water, oil and rock. By using this approach, we have estimated the influences of each dimensionless parameter on experimental results, and thus sorting out the dominant ones with larger sensitivity factors ranging from 10?4 to 100.

关键词： sensitivity analysis, model scaling, numerical experiment, water-flooding, two-phase flow.

Tectonic Evolution of the Tianhuan Depression and the Western Margin of the Late Triassic Ordos

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Acta Geologica Sinica(English Edition) 2009年第6期83卷 1136-1147页

作者： LI Xiangbo LIU Huaqing WANYAN Rong WEI Lihua LIAO Jianbo FENG Ming MA yuhu bai Yunlai Northwest Branch PetroChina Exploration and Development Research Institute Lanzhou Gansu 730020

The Ordos Basin is one of the most important oil and gas basins in China. Based on surface outcrop, key exploratory wells and seismic reflection data and by using the technology of ＂prototype basin recovery＂, seismic profile ＂layer flattening＂ and ＂restoration of balanced section＂, and other methods, the sedimentary boundary, structure and the evolution history of the Tianhuan depression on the western margin of the Ordos Basin are reestablished. The following results have been obtained. （1） The west boundary of the Late Triassic Ordos Basin was far beyond the scope of the current basin. The basin is connected with the Late Triassic Hexi Corridor Basin, and its western margin did not have tectonic characteristics of a foreland basin. （2） The Tianhuan depression was first formed in the Late Jurassic. At the late stage it was impacted by the late Yanshanian and Himalayan tectonic movement and the depression axis gradually moved eastwards to the present location with a cumulative migration distance of -30 km. （3） Eastward migration of the depression axis caused adjustment and even destruction of the originally formed oil and gas reservoirs, so that oil and gas remigrated and aggregated, resulting in secondary structural reservoirs formed at high positions on the western flank of the depression.

关键词： tectonic evolution hydrocarbon accumulation Late Triassic Tianhuan depression Ordos Basin

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致密气和煤层气联合开发选区量化评价新方法

天然气工业 2018年第9期38卷 48-54页

作者：白玉湖中海油研究总院有限责任公司

现有的致密气和煤层气联合开发选区评价方法存在着方法通用性不强、储量与储层物性等参数不能反映两气联采产量差异等问题。为此,以建立致密气和煤层气两气联采通用量化评价指标体系为目的,定义了两气联采有利区综合评价系数,以两气联... 详细信息

现有的致密气和煤层气联合开发选区评价方法存在着方法通用性不强、储量与储层物性等参数不能反映两气联采产量差异等问题。为此,以建立致密气和煤层气两气联采通用量化评价指标体系为目的,定义了两气联采有利区综合评价系数,以两气联采产量为评价目标,采用正交设计结合数值模拟手段,确定影响联采产量的关键参数及其对产量的影响程度,建立了两气联采开发选区量化评价新方法,并将新方法应用于鄂尔多斯盆地东缘KNW矿区的两气联采开发选区评价实践中。结果表明:(1)新方法建立和确定了两气地质赋存模式、关键评价参数及正交试验方案设计、评价参数对产量的影响程度、两气联采有利区综合评价系数等;(2)采用优选出的12个关键参数对KNW矿区两气联采开发选区的量化评价结果显示,该矿区南部、北部KNW-37井区为单采煤层气有利区,矿区内的KNW-10、KNW-33、KNW-9井区为单采致密气有利区,矿区中部和西南部为两气联采有利区。结论认为,所提出的致密气和煤层气联合开发选区量化评价新方法具有通用性,对两气联采开发选区具有参考意义。

关键词：致密气煤层气联合开发选区量化评价有利区正交设计通用性产量差异鄂尔多斯盆地

青海木里地区天然气水合物和煤层气联合开发可行性分析

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中国海上油气 2019年第2期31卷 144-150页

作者：白玉湖中海油研究总院有限责任公司北京100028

青海木里地区天然气水合物资源丰富,采用单一降压法开采水合物产气量较低。综合考虑该地区煤层气勘探开发潜力,提出了青海木里地区进行天然气水合物和煤层气联合开发的概念模式,并从天然气水合物和煤层气的赋存模式、开采原理、开发技... 详细信息

青海木里地区天然气水合物资源丰富,采用单一降压法开采水合物产气量较低。综合考虑该地区煤层气勘探开发潜力,提出了青海木里地区进行天然气水合物和煤层气联合开发的概念模式,并从天然气水合物和煤层气的赋存模式、开采原理、开发技术等方面分析了联合开发的可行性,以及需要解决的资源评价及选区、压裂增产、环境保护等关键问题,为实现该地区天然气水合物和煤层气的联合开发提供了参考依据。

关键词：青海木里地区天然气水合物煤层气联合开发概念模式可行性