计算机信息检索
检索报告
级 石油工程 专业 班
学号 姓名
1、 检索课题名称
CO2 在提高采收率中的应用 2、 分析研究课题
随着我国部分油田进入开发后期,如何进一步提高采收率成为一个研究热点。选择CO2 作为驱动能量一方面能“变废为宝”减少温室气体的排放,另一方面解决注水采油遇到的水资源匮乏问题。
根据以上分析,现对CO2在提高采收率中的应用进行相关信息的检索。 3、 检索策略 3.1、检索工具
1)利用“维普中文科技期刊数据库”查找相关期刊。
2)利用“CNKI中国学术期刊全文总库”查找有关硕博学位论文。 3)利用“EI”检索相关的英文文献。 4)利用“USPTO”检索相关专利。
5)利用“谷歌学术搜索”引擎搜索相关信息。 3.2、检索词
二氧化碳 and 采收率
二氧化碳 and 采收率 and 低渗油藏 二氧化碳 and 压裂 and 低压低渗气藏
4、 检索步骤及检索策略 4.1、检索工具
维普中文科技期刊数据库 4.1.2、检索式
二氧化碳+采收率 4.1.3、检索年限 2002——2012 4.1.4、检索结果
〖检索结果〗选中5篇 1/5
【题 名】新型二氧化碳泡沫提高采收率研究 【作 者】李丽君 陈星札 唐志宏 卢智慧 【刊 名】中国化工贸易.2012(4).-178-178
【文 摘】在CO2提高采收率的注入过程中,由于粘性指进、重力超覆、CO2气窜等现象,使驱替效率和采收率降低。基于此,本文提出了含表面活性剂的新型二氧化碳泡沫概念,并介绍了含表面活性剂的CO2连续注入和含表面活性剂的CO2与水交替注入(WAGS)两种新型注入方法,通过碳酸盐岩心泡沫驱替实验表明含表面活性剂的CO2注入地层形成的新型泡沫注入方式优于传统的泡沫注入方式。新型CO2泡沫能更有效的控制CO2注入时的流度,降低注入成本,减少表面活性剂在岩石表面的吸附,明显提高采收率。
2/5
【题 名】CO_2的埋存与提高天然气采收率的相行为 【作 者】孙扬 杜志敏 孙雷 汤勇 潘毅 【刊 名】天然气工业.2012(5).-39-42
【文 摘】CO2捕集与埋存可实现大气中CO2的有效降低,但成本高昂,而处于特定温度压力范围的气藏可保证超临界CO2的稳定埋存,是其理想的埋存靶场。研究认为:气藏中所储存的具有开发潜力的天然气会挤占超临界CO2的地层空间,影响其稳定埋存;选择适合的超临界CO2稳定埋存深度,在埋存的同时利用CO2驱替开采天然气,有利于CO2埋存并降低成本;在向气藏注入CO2提高天然气采收率的过程中,CO2驱替地层天然气的过程是"混相驱替"。根据PY干气藏温度、压力条件,在CO2与天然气混合体系PVT相态特性实验测试基础上,运用状态方程模拟方法,分析了3种不同流体带特别是超临界CO2天然气过渡带的偏差系数、地下体积比、密度、黏度的变化,明确了利用气藏实施超临界CO2稳定埋存与注CO2提高天然气采收率相互配套的必要性和可行性,并据此给出PY气藏在实施注入CO2提高天然气采收率技术时,超临界CO2可行的注入深度和采气压力范围。 3/5
【题 名】二氧化碳封存及提高石油采收率的环境风险研
究
【作 者】耿海燕 赵东风 王嘉麟 【刊 名】安全与环境工程.2012(3).-55-58
【文 摘】随着全球气候变暖效应的加剧,如何降低大气中二氧化碳含量成为一个焦点问题,二氧化碳的地质封存及资源化利用成为可选的有效途径。目前,二氧化碳封存及二氧化碳提高石油采收率的项目已遍布世界各地,但是其存在的环境风险不容忽视。本文从二氧化碳的封存原理出发,具体分析了二氧化碳地质封存的风险来源及其可能对环境、人体、生态等造成的危害,同时结合二氧化碳提高石油采收率工程的特殊性进行了风险分析,并鉴于我国目前并没有相应的风险评价导则,提出了下一步需要根据相应的风险类型制定出一套适合我国二氧化碳地质封存的风险评价体系的建议。 4/5
【题 名】水驱废弃油藏注二氧化碳驱室内试验研究 【作 者】李中超 杜利 王进安 聂法健 【刊 名】石油天然气学报.2012(4).-131-135
【文 摘】为探讨进一步提高高温、高盐水驱废弃油藏采收率潜力,以河南濮城沙一下亚段油藏为目标,开展了垃入CO2流体性质变化、细管驱替、长岩心驱替室内试验。
试验验证了注入C02可改善原油流动性、有效增加地层能量和可动油等驱油机理;油藏原油性质好,混相压力低,目前油藏条件可达到混相;优选CO2/水交替驱为最佳注八方式;优化了注入段塞组合;组分检测分析认为CO2/水交替驱波及到了水波及不到的原油。研究结果为濮城沙一下亚段油藏CO2驱矿场试验提供了技术支持,并对其他特高含水期油藏注CO2进一步提高采收率同样具有借鉴意义。 5/5
【题 名】任11碳酸盐岩油藏注CO2提高采收率研究 【作 者】郭平 周耐强 张茂林 张晓辉 【刊 名】西南石油大学学报.2012(2).-180-184
【文 摘】许多碳酸盐岩油藏进入高含水开发期,如何挖潜,进一步提高采收率是目前的主要工作方向。目前任11碳酸盐岩油藏存在单井产油量低,注入水利用系数低,水驱效率越来越差的问题。因此需要探索新途径,以便进一步发挥油藏生产潜力。分析了任11油藏注CO2提高采收率的机理,开展了任11油藏注CO2提高采收率的数值模拟研究。针对研究区块的地质及开发特点,建立了相应的三维数值模型,在水驱历史拟合的基础上,应用数值模拟技术从注气强度、注气方式、注气部位,生产气油比控制
等方面进行了优化研究。油藏注CO2方案模拟计算20年,产油量显著上升,采用注CO2可比目前开发方式提高采收率3.5%左右。
4.2、检索工具
CNKI中国学术期刊全文总库 4.2.1、检索式
主题=二氧化碳+采收率 4.2.2、检索年限 2002——2012 4.2.3、检索结果
【1】Title-题名: CO_2提高特超稠油采收率作用机理研究 Author-作者: 林吉生
Source-文献来源: 中国石油大学 Summary-摘要:
在石油工业中CO_2作为一种驱油剂;被广泛使用。无论是室内实验还是矿场试验都已经证明;用CO_2驱油是一种能大幅度提高油井产能的有效方法。随着我国二氧化碳气源的发现和配套技术的完善;二氧化碳成为提高低渗透和稠油油藏的一项新技术;得到了较为广泛的应用;并具有良好的应用前景。
本论文主要针对胜利油田特超稠油开采难度大;采收率低等问题进行了研究。在文献调研和现场资料分析的基础上;开展了特超稠油
的粘-温及流变特性研究、CO_2对地层油物性、粘度、界面张力的影响研究以及填砂管驱油实验研究。通过对以上实验结果进行深入的分析;得出了如下初步结论:
(1)特超稠油对温度非常敏感:随着温度升高;粘度急剧降低;而且逐渐由非牛顿流体转变为牛顿流体;即存在一个临界温度;
(2) CO_2非常容易溶于特超稠油中;在地层温度和地层压力条件下;气油比能够达到59.04 m3/m3(标);
(3)随着CO_2溶解量的增加;原油的体积系数和收缩率明显增大;有利于膨胀后的剩余油脱离地层水及岩石表面的束缚;变成可动油;从而增加油井产量;
(4)地层油粘度随着溶解CO_2量的增加大幅度降低;在地层温度和地层压力条件下;当气油比达到23.9m3/m3(标);粘度就降低到6581.93mPa.s;降粘率达到90%以上;
(5)地层油粘度随着压力的增加而增大;但是随着CO_2溶解量的增大;粘度对压力的敏感性明显减弱;
(6) CO_2能够明显降低油水间界面张力;矿化度的增加对饱和有CO_2油水体系的界面张力没有明显的影响;
(7)通过蒸汽驱物理模拟实验得出CO_2提高特超稠油采收率主要作用机理为:CO_2溶解于原油降低原油粘度和油水界面张力、CO_2同表活剂结合后不仅能够降低油水见界面张力;同时形成的弱泡沫体系能够有效提高高温蒸汽波及系数。
【2】Title-题名: 低渗透油藏注CO_2提高采收率技术与应用
Author-作者: 雷友忠
Source-文献来源: 西南石油大学
Summary-摘要: 近年来发现的低渗透油藏所占比例越来越大;而低渗透油藏开采难度大;衰竭式开发采收率很低;注水开发存在“注入难”的问题。因此;如何经济高效开发低渗透油藏是当前油田开发中具有相当难度和重要意义的课题。由于气具有易流动;降粘;体积膨胀;降低界面张力的作用;因此注气驱在解决低渗透油藏开发方面表现出独特的优势。CO_2是注气驱优选溶剂之一。因此;探索低渗透油藏注CO_2驱油机理、驱油效果以及现场如何合理高效的实施CO_2注气开发具有重要意义。
论文选用大庆芳48断块扶余油层注气试验区为对象;开展了地层油注CO_2气驱的膨胀实验、细管实验和长岩芯驱替实验研究;并对实验结果进行了模拟研究:分析了试验区试采动态和现场注CO_2气试验的动态特征;以芳48断块扶余油层试验区的地质特征为基础建立了注气驱的数值模拟模型;利用GEM组份模拟器;在拟合注CO_2气驱动态基础上;设计了注水、注气和水气交替注入开发方案;优选了注气调整方案。研究结果显示:CO_2的注入使芳48断块膨胀系数、体积系数、气油比增加;粘度降低;细管实验测定的注CO_2气驱的最小混相压力为47MPa。结合实际情况认为大庆宋芳屯油田注CO_2气驱替只能是非混相驱。低渗透油藏注气存在注气启动压力;本次实验为2.48MPa。芳48断块岩心在22.64MPa下注CO_2采收率为48.15%。
注气井注入压力较低;解决了注水开发实践中“注入难”的问题。注入的CO_2对近井地带地层有显著的改善作用。方案优选结果认为:当注气突破后;注入一定量气形成油气传质过渡带后;进行水驱将是较好的选择;当突破井气油比上升到一定程度后;实行间歇开井。 【3】Title-题名: 注CO_2提高煤层气采收率项目的环境效益评价研究
Author-作者: 张婷婷 Source-文献来源: 吉林大学 Summary-摘要:
全球气候变化是人类迄今面临的最重大环境问题;也是21世纪人类面临的最复杂挑战之一。因为气候变化不仅仅是气候系统本身的问题;而且还涉及经济、政治、环境问题;其核心问题是经济问题。因为减缓气候变化;就要减少温室气体排放和增加温室气体的吸收;使大气层中的温室气体浓度回复到工业革命以前的水平。温室气体中的二氧化碳(CO2)、甲烷(CH4)主要是能源利用排放的。所以;减缓气候变化的减排政策将涉及国家的经济发展;而且直接影响发展中国家的现代化与可持续发展进程。《京都议定书》正式生效以后;各国;尤其是发展中国家都面临着一些新的挑战和机遇。
本文首先介绍了注二氧化碳提高煤层气采收率先导性试验的原理及试验的模拟情况;并介绍了环境效益评价的理论方法:效益费用分析方法和CDM方法。在这两种方法的基础上分析了注二氧化碳提高煤层气采收率项目的环境效益评价影响因素;确定了环境效益分析的
内容;建立了环境效益评价的计算公式。以山西沁水盆地南部注二氧化碳提高煤层气采收率先导性试验为例;利用本文所建立的环境效益评价计算公式进行评价;得到的结果显示此类项目环境效益可观。在本论文研究的基础上;作者提出了如下建议来达到我国节能降耗保护环境的目标:完善CDM项目环境效益评价体系;发展碳减排交易;大力实行注二氧化碳提高煤层气采收率项目规模生产;积极开展碳埋藏研究;改变能源消费结构;走新型工业化道路;调整我国中长期经济结构及工业结构;积极进行技术更新。
【4】Title-题名: 二氧化碳地下埋存混相驱油过程渗流机理模型及数值模拟
Author-作者: 赵阳
Source-文献来源: 东北石油大学
Summary-摘要: 随着现代化市场的不断发展;石油的需求量不断增长;国内的老油田不断枯竭;油田的开采越来越难;这就要求人们从枯竭的油层中将原始地质储量近一半的原油开采出来;迫切期待着新型的提高采收率技术的产生和应用。而在众多提高采收率技术中;二氧化碳驱技术具有更广泛的应用前景和更明显的技术优势。
本文结合国家自然科学基金项目(编号:51176023);在对二氧
化碳物理化学性质等基础知识进行了解的基础上;阐述了二氧化碳的驱油机理和注入方式;并根据质量守恒定律;建立了CO2驱油的多组分多相非等温数学模型;给出了相应的辅助方程及求解方法。并且在
对二氧化碳驱油过程进行数值模拟前;首先应对二氧化碳驱的油藏条件进行研究分析;确定其是否具备注气开发的条件;其次;由于各油层的条件不同其剩余油分布规律不同;对采收率的影响程度也不同。不同的情况;采用不同的技术来提高采收率。因此;对剩余油分布规律进行研究;有利于从整体上认识油田开采的潜力所在;为选择适当的开采技术提供参考。对油藏的特性进行分析后;确定初始条件和边界条件;应用CMG-GEM软件对二氧化碳驱油过程进行数值模拟。研究储层、流体性质等方面因素对CO2驱油效果的影响;通过方案对比得出不同储层渗透率、纵横向渗透率比值(Kv/Kh)、原油密度及分子扩散作用和对流弥散作用对原油采收率的影响;对模拟输出结果进行分析;确定各因素对油田采收率的影响作用;为油田生产提供指导。
【5】Title-题名: 注二氧化碳提高煤层气采收率理论与实验研究 Author-作者: 张鹏
Source-文献来源: 太原理工大学
Summary-摘要: 煤层气是煤矿安全生产的主要危害;是造成温室效应与臭氧层破坏的主要气体;同时煤层气作为一种新型的洁净能源;可以改善我国以煤炭为主的不合理的能源结构。因此;从安全、环保和能源的角度看;煤层气的开采具有重要意义。
本文针对我国煤层气藏低渗透、低饱和、低压力的特点和煤层气采收率低的现状;采用注入二氧化碳驱替的技术来提高煤层气的采收率。本文首先介绍了煤体孔裂隙结构特征、煤层气的赋存状态和运移
产出机理以及煤层气的吸附解吸特征。然后在此基础上进行了甲烷、二氧化碳气体的渗透率测试试验;通过试验得出:煤体渗透率受体积应力及渗透压力的双重影响;渗透压一定时;随体积应力增大渗透率减小;主要由煤体的变形作用引起;体积应力一定时;随渗透压增大渗透率的变化不是单调的而是存在一个临界点;渗透压小于这一临界压力值时渗透率减小;渗透压大于这一临界压力值时;渗透率呈现逐渐增大的趋势;主要是由气体的吸附作用引起;并且二氧化碳的渗透率是甲烷渗透率的10倍以上。最后进行不同压力下甲烷和二氧化碳气体的吸附、甲烷解吸和注二氧化碳驱替甲烷等试验;实验结果显示;甲烷和二氧化碳吸附、解吸曲线基本相同;体积应力一定时渗透压增大吸附量也相应增大;相同压力下二氧化碳的吸附量远远大于甲烷的吸附量;渗透压分别为6MPa和7.5MPa时;煤层气解吸率分别为36.9%和37.2%;两种情况下甲烷的解吸率变化不大;由此可知煤体解吸量和渗透压力的大小几乎无关;而是与煤体本身含气量的多少有关;驱替压力6MPa时;注气开采率、瓦斯解吸率、注气开采增产率和置换比分别为71%、36.9%、34.1%和6.7;驱替压力7.5MPa时;相应的注气开采率、瓦斯解吸率、注气开采增产率和置换比分别为73%、37.2%、35.8%和6.1;驱替压力在一定程度上能够提高驱替效率;采用注二氧化碳气体驱替的技术可以使煤层气的产量提高大约35%;同时也使二氧化碳气体永久埋存于煤层中;减少了二氧化碳气体对环境的污染和瓦斯爆炸事故的发生。 4.3、检索工具
EI 4.3.1、检索式
(((carbon dioxide) WN KY) AND ((enhanced oil recovery) WN KY)) +low-permeability reservoirs
4.3.2、检索年限 2002——2012 4.3.3、检索结果 Numerical simulation study on CO2 flooding in ultra-low permeability reservoirs Cui, Maolei1; Ding, Yunhong2; Yang, Zhengming2; Xiong, Shengchun2; Wang, Xuewu2 Source: Procedia Environmental Sciences Abstract: Massive discharge of CO2 has serious impact on the global climate and threatening the survival of humanity and life. How to make waste profitable becomes the subject of attention. Against this issue with my research domain, CO2 could be injected in the oilfield as a kind of oil-displacing agent, especially the ultra-low permeability oilfield with difficulty in water injection. This technology not only displaced oil but also sealed up part of CO2 underground forever. This passage summarized CO2 displacing mechanism, and did research on the opportunity of advanced CO2 injection and the style of cycle CO2 injection by reservoir numerical simulation application in a typical block using Eclipse software. Through comparing with six proposals, the consequences indicated that CO2 flooding technology could be applied in ultra-low permeability oilfield. Advanced CO2 injection and the style of cycle CO2 injection could both have good flooding effect and pressure maintenance degree. The best opportunity of Advanced CO2 injection is 4 months. In cycle injection proposals, increase-decrease style is better than increase-suspend style. These conclusions could not only provide new theoretical basis for gas flooding in ultra-low permeability reservoirs, but also solve the reduction of CO2. Experimental and numerical simulation study on single layer injectivity for CO2 flooding in low permeability oil reservoir Yu, Hongwei1; Song, Xinmin2; Yang, Siyu1; Chen, Dingfeng3 Source: Society of Petroleum Engineers - SPE Enhanced Oil Recovery Conference 2011 Abstract: Supercritical carbon dioxide can keep miscible with crude oil, and eliminating the two-face interface existed in conventional water and gas flooding. The displacement efficiency in laboratory experiment is nearly 100%, so it has the potential to increase oil recovery significantly. However, in practical application of CO2 miscible flooding, severe disaccord appears with injection time increasing between the single layer's injectivity and its physical property because of many influencing factors, the injection ratio of high permeable layers increases, and the injection ratio of low permeable layers decreases, the injectivity of single layers is unbalanced seriously, so the CO2 swept volume will be influenced, finally leading to the poor EOR result. According to the laboratory experiment of parallel connection cores, injection and production profile in practice and the prediction of numerical reservoir simulation, getting the conclusion that the main influencing factors for the injectivity of single layer are interlayer heterogeneity, mobility ratio, gravity, CO2 molecular diffusion and capillary force, and interlayer heterogeneity influences injectivity most seriously. For avoiding the injectivity disaccord, based on these influenced factors, suggestions have been offered to the CO2 miscible flooding pilot test in Jilin oilfield, these suggestions can provide reliable methods for enlarge CO2 flooding swept volume. Laboratory study of miscible carbon dioxide flooding of UAE carbonate oil reservoirs Almehaideb, Reyadh1; Shedid, Shedid A.2; Zekri, Abdulrazaq Y.1 Source: Society of Petroleum Engineers - 13th Abu Dhabi International Petroleum Exhibition and Conference Abstract: This laboratory study describes the technical feasibility of applying C02 miscible flooding in a major field in Abu Dhabi, UAE. The field section considered is a low permeability carbonate that had so far poorly responded to water flooding.The study had two major aspects, phase behavior and core flooding. In phase behavior, the field's petroleum was studied with its minimum miscibility pressure with C02 determined. Also, asphaltene precipitation due to C02 injection was measured ami included in the phase behavior model. In core flooding, detailed rock characterization was carried out using SEM, EDS, ami ICP. Thereafter, core floods were carried out to evaluate the additional recovery from miscible C02 injection and the optimum C02 slug sizes. Core floods were also used to evaluate recoveries from different initial saturations, for less than miscible conditions, and for side effects such as asphaltene precipitation, sulfur deposition, and effect of C02 on the limestone rock. A simulation study of carbon dioxide sequestration in a depleted oil reservoir Momeni, A.1; Aghajani, M.2; Zargar, G.2 Source: Petroleum Science and Technology Abstract: Oil fields offer significant potential for storing carbon dioxide (CO 2) and will most likely be the first large-scale geological targets for sequestration because the infrastructure, experience, and permitting procedures already exist. In addition, almost 40 years' experience in enhanced oil recovery (EOR) allows utilization of carbon capture and storage (CCS) and CO2 sequestration techniques in such a way as to improve recovery of petroleum fields and reduce the environmental issue of fossil fuel combustion gas products, particularly carbon dioxide. Carbon dioxide is one of the main greenhouse gases that causes global warming. As a response to global warming, geologic sequestration of CO2 in oil and gas reservoirs is one possibility to reduce the amount of CO2 released to the atmosphere. This simulation study presents a synthetic geologic model that is used to sequestrate carbon dioxide beside an EOR immiscible displacement process. Simulation of CO2 enhanced oil recovery in heterogeneous models Biu, Victor T.1 Source: Society of Petroleum Engineers Nigeria Annual International Conference and Exhibition 2011 Abstract: In mature and depleted oil field, it has been discovered that significant amount of oil is left unswept. The ability to evaluate the remaining oil depends on the understanding of the heterogeneity of the reservoir most especially when there is plan for tertiary flooding such as Carbon dioxide EOR This work focuses on the impact of geological structure on the sweep efficiency and reservoir oil recovery in a small-scale heterogeneous model using CO2 injection. Three models which include: homogeneous, layer and laminated reservoir models with sedimentary structures were simulated with ten hydrocarbon fluid component. Results from the simulation of the three geological models indicate channeling effect in a laminated model which results to more oil been trapped in the low permeability laminae, thus lower oil recovery. It was discovered that the CO2 rich oil zone forms a mobile displacement front in the 2-D x-y model that enhances the sweep efficiency in all layer and homogeneous models review. At reservoir pressure below saturated pressure, increase in oil saturation close to the injector was noticed in the homogeneous model due to gravitational effect. This could be attributed to the increase in density of the dissolved CO2 in oil resulting to bypassed oil. Result also discovered that higher temperature and pressure, irrespective of the nature of the reservoir system has significant effect on oil recovery during CO2 flooding. 4.4、检索工具 USPTO 4.4.1、检索式 (((carbon dioxide) WN KY) AND ((enhanced oil recovery) WN KY)) 4.4.2、检索年限 2002——2012 4.4.3、检索结果 Enhanced oil recovery using carbon dioxide Cullick, Alvin S. Assignee: Mobil Oil Corporation Publication Number: US4609043Publication date: 09/02/1986 Kind: Utility Patent Grant Abstract: PAL An enhanced oil recovery process in which carbon dioxide is injected into the oil-bearing formation under supercritical conditions to act as a solvent for the oil. Mobility of the carbon dioxide is controlled by the use of a dissolved polymer whose solubility is enhanced by the use of an entrainer comprising a polar organic compound such as an alcohol or a glycol.IPC Code: E21B43/22US Classification: 166/274 - 252/8554 - 166/268 Database: US Patents Compilation and indexing terms, 2009 LexisNexis Univentio B.V. CARBON DIOXIDE PRODUCTION FOR ENHANCED OIL RECOVERY SATCHELL, JR., Donald Prentice; FITCH, Frank R.; TAMHANKAR, Satish S. Publication Number: US20110038783Publication date: 02/17/2011 Kind: Patent Application Publication Abstract: A method for producing carbon dioxide by the steps of feeding a CO2-rich feed stream containing fuel gas to an oxygenated oxygen-selective ceramic bed to produce a product stream of carbon dioxide, water, and residual oxygen; adding oxygen to this product stream and feeding to an oxygen-depleted oxygen-selective ceramic bed and recovering carbon dioxide substantially free of oxygen and fuel gas. In an additional embodiment, nitrogen oxides are also removed from the fuel gas.IPC-8 Code: C01B 31/20US Classification: 423/437.1 Database: US Patents Compilation and indexing terms, 2009 LexisNexis Univentio B.V. Enhanced oil recovery process employing carbon dioxide Fleming, Graham C. Assignee: Atlantic Richfield Company Publication Number: US4683948Publication date: 08/04/1987 Kind: Utility Patent Grant Abstract: PAL A process for recovering hydrocarbons, e.g., crude petroleum, from a formation comprising: (a) injecting carbon dioxide into the formation; (b) shutting off the wells to the formation to allow the carbon dioxide to contact and disperse in the hydrocarbons in the formation; (c) recovering hydrocarbons from the formation; (d) repeating steps (a), (b) and (c) at least once; (e) injecting a carbonated aqueous liquid composition into the formation to drive the hydrocarbons toward the production well or wells and (f) recovering hydrocarbons from the formation.IPC Code: E21B43/22US Classification: 166/263 - 166/273 - 166/268 Database: US Patents Compilation and indexing terms, 2009 LexisNexis Univentio B.V. Polysilylenesiloxane polymers useful in enhanced oil recovery using carbon dioxide flooding Davis, Bruce W. Assignee: Chevron Research and Technology Company Publication Number: US5123486Publication date: 06/23/1992 Kind: Utility Patent Grant Abstract: PAL A polymer is disclosed that is useful in increasing the viscosity of carbon dioxide. That polymer, polymer comprises a polysilylenesiloxane preferably polydimethylsilylenedimethylsiloxane. That polymer can be used in a method for recovering oil from an underground oil-bearing earth formation penetrated by an injection well and a producing well, in which method carbon dioxide is injected into the formation to displace oil towards the producing well from which oil is produced to the surface. The viscosity of the carbon dioxide injected into the formation is increased at least three-fold by the presence of a sufficient amount of the polysilylenesiloxane polymer and a sufficient amount of a cosolvent to form a solution of the polymer in the carbon dioxide.IPC Code: E21B43/22US Classification: 252/8554 - 166/273 - 166/268 Database: US Patents Compilation and indexing terms, 2009 LexisNexis Univentio B.V. Polydialkylsilalkylene polymer useful in enhanced oil recovery using carbon dioxide flooding Davis, Bruce W. Assignee: Chevron Research Company Publication Number: US4852651 Publication date: 08/01/1989 Kind: Utility Patent Grant Abstract: PAL A polymer is disclosed that is useful in increasing the viscosity of carbon dioxide. That polymer comprises a polydialkylsilalkylene polymer; wherein the dialkyl group is preferably dimethyl, methylethyl, or diethyl; and the alkylene group is preferably ethylene or methylene. Preferably, the polymer is polydimethylsilalkylene. That polymer can be used in a method for recovering oil from an underground oil-bearing earth formation penetrated by an injection well and a producing well, in which method carbon dioxide is injected into the formation to displace oil towards the producing well from which oil is produced to the surface. The viscosity of the carbon dioxide injected into the formation is increased at least three-fold by the presence of a sufficient amount of the polydialkylsilalkylene polymer and a sufficient amount of a cosolvent to form a solution of the polymer in the carbon dioxide.IPC Code: E21B43/22US Classification: 252/8554 - 166/273 - 166/268 Database: US Patents Compilation and indexing terms, 2009 LexisNexis Univentio B.V. 4.5、检索工具 谷歌学术搜索 4.5.1 搜索关键字 二氧化碳在提高采收率中的应用 4.5.2 检索结果 【1】 题目:注CO2提高采收率技术现状 网址http://www.cqvip.com/qk/90433x/20074/26320756.0.html 摘要:介绍了注二氧化碳提高采收率的机理、室内研究进展 以及国内外开展现场试验的情况。在现场应用中二氧化碳吞吐、混相驱和非混相驱都可有效提高采收率,合适的注CO2工艺需根据油藏条件选择。指出了注CO2技术目前面临的腐蚀、气源、气窜及高投资等问题。 【2】题目:注CO2提高采收率技术研究进展 网址:http://www.cqvip.com/qk/98573x/200901/29562552.html 摘要:综述了国内外CO2驱技术的应用和研究进展。首先对世界注CO2采油的发展现状进行了统计分析,指出注CO2驱油适用油藏参数范围较宽,提高采收率幅度较大,以逐年增长的态势和显著的成效成为未来提高原油采收率主要技术之一。进一步分析了CO2的驱油机理、筛选标准和开发设计技术研究进展,特别是近年来发展的近混相驱替理论、模糊层次分析法以及注CO2驱的井网类型和注入方式。 【3】题目:利用CO2非混相驱提高采收率的机理及应用现状 网址:http://www.cqvip.com/qk/98131a/200702/24136434.html 摘要:由于重油的相对分子量很高,CO2与原油的混相压力比油藏压力高得多,因此通过注CO2提高原油采收率必须依赖非混相驱。在非混相驱中,CO2溶入原油后,使油膨胀,并降低油的粘度,从而达到驱油增产的目的。通过介绍非混相CO2驱在油藏增产中的驱油机理,证明CO2作为一种有效的驱油剂,可以提高油藏原油的采收率。 【4】题目:CO2吞吐技术在断块油藏的应用 网址:http://www.cqvip.com/qk/96078x/20013/5370708.0.html 摘要:通过对CO2吞吐技术的室内研究表明:将液态CO2注入油层,在地层温度下,CO2快速气化混溶于原油中,可降低原,油粘度85.9%,从而增加原油流动能力,同时地下原油体积膨胀27.9%,储集层孔隙压力升高,在局部形成饱和地带, 使部分剩余油被驱动,油相渗透率增大,可使驱油效率提高7.5%,从而提高油藏的最终采收率,对低渗,封闭,未注入的复杂断块油藏比较适用,目前在孤岛采油厂已实施11口油井,已增油1540吨,取得了较好的矿场试验效果,展示出CO2吞吐在断块油藏应用的光明前景。 【5】题目:二氧化碳泡沫压裂技术在低渗透低压气藏中的应用 网址:http://www.cqvip.com/qk/95667x/200403/9768840.html摘要:针对低渗透、低压气藏压裂改造中压裂液返排困难的问题,研究了CO2泡沫压裂技 术,分析了CO2泡沫压裂过程中井筒和储层温度场变化对CO2液气转化的影响,对提高CO2 泡沫压裂液的流变性、内相恒定与工艺措施等进行了室内研究。现场试验表明,CO2泡沫压裂技术能减少进入地层的水基压裂液量,提供地层液体返排的能量,达到了压裂液自喷、快速、多排的目的,从而降低了压裂液对储层的二次伤害,提高了低渗透、低压气藏的压裂效果。 5、 检索结果评价 本次检索采用2个中文数据库、2个外文数据库、一个网络搜索引擎,查到的信息有硕士论文、期刊论文、会议论文等多种形式的资料,内容完整,并且检索年限都在近十年内,资料较新,有较高的参考价值。通过检索,不仅查找到了与课题相关的信息,也发现了与该课题相关的一些新问题和把握了该方向的发展动向。 6、 综述 本次检索同过运用不同的数据库提取出共25篇比较符合条件的论文,其大部分主要论述了二氧化碳在提高采油率方面的发展现状和前景,已经在低压低渗等非常规油气藏中的应用。文章《新型二氧化碳泡沫提高采收率研究》介绍了含表面活性剂的CO2连续注入和含表面活性剂的CO2与水交替注入(WAGS)两种新型注入方法,通过碳酸盐岩心泡沫驱替实验表明含表面活性剂的CO2注入地层形成的新型泡沫注入方式优于传统的泡沫注入方式。文章《二氧化碳封存及提高石油采收率的环境风险研究》则主要论述了随着全球气候变暖效应的加剧,如何降低大气中二氧化碳含量成为一个焦点问题,二氧化碳的地质封存及资源化利用成为可选的有效途径。文章《Experimental and numerical simulation study on single layer injectivity for CO2 flooding in low permeability oil reservoir》主要介绍了用实验和数值模拟的实验室方法研究二氧化碳在提高采收率方面的应用。其次,其他文献也在不同的角度介绍并论证了二氧化碳在提高采收率方面的巨大价值。通过分析检索出的文献能够系统的了解该课题的发展现状及前景,达到了此次检索的目的。 因篇幅问题不能全部显示,请点此查看更多更全内容