New screening method for reservoir by CO_2 injection miscible flooding

注CO2混相驱是一种提高原油采收率的重要手段,实施该方法的关键是筛选出具有开发潜力的油藏。目前,在注CO2混相驱油藏的筛选上,缺乏统一的筛选指标和筛选方法。通过对国内外注CO2混相驱油藏开采情况的分析和对比研究,选取了影响注CO2开采效果的12个筛选指标,利用概率与数理统计方法提出了筛选指标的评价标准,并应用模糊优选理论和模糊层次分析法,建立了区间数注CO2混相驱油藏筛选模型。应用该筛选方法对6个典型的候选油藏进行了筛选排序和综合评价。结果表明,该方法能够客观地评估油藏注CO2开发潜力的大小。CO2 injection miscible flooding is an important method for enhanced oil recovery(EOR).It is important to screen out the potential reservoirs for using the method.Now,there aren t uniform screening indexes and method about screening out CO2 injection miscible flooding reservoirs.Based on the analysis and researches of the CO2 injection miscible flooding reservoirs,12 indexes affecting CO2 injection miscible flooding results were picked out.By the method of probability statistics,the assessment criterions were brought forward.And combining with fuzzy optimum and fuzzy analytical hierarchy process(FAHP),the interval number screening model for CO2 injection miscible flooding reservoirs was successfully established.This screening method was used to screen and assess six classical candidate reservoirs about CO2 injection miscible flooding.The results show that the method could perfectly evaluate and screen the potential of CO2 injection of the candidate reservoir.国家自然科学基金项目(40472156

An Overview of the Concept of Regional Sediment Management

就"区域沉积物管理"(简称RSM) 概念与方法进行了系统论述,以厦门地区为例阐述了 RSM 研究的必要性和重要性,并对如何应用区域沉积管理来处理海岸冲刷、淤积与港口码头建设过程中可能遇到的问题进行了深入浅出的讨论,同时,提出了发展 RSM 的战略构想与框架。In this article we described the concept of "regional sediment management" (RSM), and identified opportunities for and impediments to implementing regional approaches to sediment management, and also summarized the background information and applications of RSM. Furthermore, we considered the needs of RSM studies and, suggested the framework for developing RSM strategies, and described the specific studies for the Xiamen region

Dynamic simulation of gas hydrate reservoirs in the Shenhu area,the northern South China Sea

为进一步了解南海北部神狐海域天然气水合物的成藏匹配条件,利用典型二维地震剖面,构建了该区的地质模型,并对其进行了天然气水合物成藏动力学的模拟。研究结果表明:神狐海域具备天然气水合物成藏的温度、压力条件;生物气和热解气的资源潜力巨大,满足水合物形成的气源条件;运移条件优越,有利于天然气水合物的聚集成藏。并提出了该区天然气水合物的成藏模式。The north slope of the South China Sea is structurally characterized by a passive continental margin and has various Cenozoic oil-and gas-bearing depositional basins,where hydrocarbon resources are abundant,and the geological and tectonic settings,the temperature and pressure regimes as well as the methane-generative potential of thick organic-rich sediments are all favorable for the formation of gas hydrate.As a result,this region is also an ideal area for studying gas hydrate accumulations.In order to understand natural conditions of the gas hydrate formation,based on the typical 2-dimensional seismic image of the Shenhu area,a geological model of gas hydrate reservoirs was established and a dynamic simulation of gas hydrate accumulations was carried out as well.The results indicated that the temperature and pressure of the Shenhu area are appropriate for gas hydrate accumulations,source rocks there have a huge gas-generative potential and hydrocarbon migration conditions are favorable,providing an abundant gas source and good pathways for the gas hydrate formation.A forecasting model of the gas hydrate formation was given based on basin analysis,indicating that the Shenhu area is a better prospect area of gas hydrate because of its huge potential of gas hydrate resources.国土资源部公益性行业科研专项(200811014)“天然气水合物成藏的控制因素研究”;国家自然科学基金项目(No.40930845)“南海北部深水盆地油气渗漏系统与天然气水合物富集机制研究”;国家重点基础研究发展规划(973)项目(2009CB219501)“南海北部天然气水合物成藏的气源条件研究”联合资

NEW SCREENING METHOD FOR GAS TRACER IN MISCIBLE FLOODING

气体示踪技术是注气油藏现场动态监测的重要手段,已经成为混相驱油藏开发的重要组成部分,但目前在气体示踪剂的筛选上,缺乏统一的筛选参数和筛选方法。通过对气体示踪剂应用效果及其影响因素的分析和对比研究,提出了7个筛选参数,并建立了基于模糊优选理论和模糊层次分析法的混相驱气体示踪剂筛选模型,同时,以吐哈盆地葡北油田为例,对4种常用的气体示踪剂进行筛选排序和综合评价,结果表明该方法能够有效快捷地筛选出指定油藏的最佳气体示踪剂。Gas tracer technology,which is an important means to inspect the Gas injection reservoir's performance,has become a necessarily part of miscible flooding.Up to present,there aren't uniform screening parameters and method to screen out the potential reservoirs.Based on the analysis and researches of the factors,which affecting gas injection miscible results,7 parameters are pointed out.The model for gas tracer is successfully established,based upon the method of Fuzzy Optimum and FAHP(Fuzzy Analytical Hierarchy Process).The new screening method is used to screen and assess the 4 classical gas tracers in the Pubei Oil Field.and the results show that this method could perfectly evaluate and screen the optimal of the candidate gas tracer.国家自然科学基金项目(编号:40472156)资

基于E0-1 Hyperion影像地物识别与分类不同方法的效果比较

以广州市大学城为研究区域裁剪出Hyperion影像,直接从影像提取地物端元,采用光谱角匹配、无约束和全约束的线性混合像元分解等3种方法进行地物识别与分类,分别生成地物分类图;选用Kappa系数和总精度两个参数,对比不同方法的地物识别效果.结果显示,分类图像的总精度均大于60%,Kappa系数在0.61—0.80,表明将高光谱影像用于地物识别与分类,可获得好的地物识别与分类结果.其中,光谱角匹配和全约束的线性混合分解法得到的两个参数明显更大.就地物类型而言,3种方法都对自然地物有较好的识别与分类效果,如林地和草地的用户精度高于80%,裸地和水体的值也高于50%.对人工地物的高反射率表面也有好的识别效果,用户精度达100%;对老建筑屋顶以及低反射率表面的识别效果不佳.尽管如此,光谱角匹配和全约束的线性混合像元分解法对于识别建筑屋顶的水泥混凝土表面表现出优势,用户精度大于71.4%

分子束外延生长的InAs/GaAs自组织量子点发光特性

研究了分子束外延生长的覆盖了1nm的InxAl1-xAs(x=0.2,O.3)和3nm的Ino2Gao8As复合应力缓冲层InAs/GaAs自组织量子点(QD)光致发光(PL)特性.加InAlAs层后PL谱红移到1.33μm,室温下基态和第一激发态间的跃迁能级差增加到86meV.高In组份的InAlAs有利于获得较长波长和较窄的半高宽(FWHM).对于覆盖复合应力缓冲层的QD不会使波长和FWHM发生显著变化,但可以使基态和第一激发态间的能级差进一步增大.这些结果归因于InAlAs能够有效的抑制In的偏析,减少应力,使QD保持较高的高度.同时,由于InAlAs具有较高的限制势垒,可以增加基态和第一激发态间的能级差

高导热苯乙烯丙烯酸树脂复合材料制备及导热性能

苯乙烯丙烯酸树脂为墨粉主要组分,其导热性能提升可显著提高墨粉导热性能,进而延长打印、复印机使用寿命。通过在苯乙烯丙烯酸树脂中添加碳纳米管、石墨烯高导热单一或复合填料,在苯乙烯丙烯酸树脂构建连通导热网络以提高其导热性能。当苯乙烯丙烯酸树脂中添加0.75wt%多壁碳纳米管时,其导热系数可提高至0.1644 W/(m·K),增幅为31.31%;添加1.0wt%羧基改性多壁碳纳米管时,苯乙烯丙烯酸树脂导热系数可提高至0.1751 W/(m·K),增幅为39.86%;在苯乙烯丙烯酸树脂添加多壁羧基改性碳纳米管和石墨烯混合填料时,苯乙烯丙烯酸树脂导热系数可提升至0.2093 W/(m·K),增幅达到67.17%。表明碳纳米管和石墨烯混合填料可在苯乙烯丙烯酸树脂中形成有效的导热网络,从而显著提高苯乙烯丙烯酸树脂导热性能