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1.
永乐油田经过10余年开发,部分区块水淹严重,低产井比例逐年增加,造成地面资产闲置。但油田采出程度较低。为有效动用剩余油,提高采收率,针对储层发育特点,提出利用侧钻超短半径水平井开采剩余油,并分析永乐油田侧钻潜力。通过经济评价,得出侧钻与加密相结合的方式使油田开发效益更好的结论。 相似文献
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为充分利用地质、工程报废井眼,低成本挖掘油藏剩余油潜力,侧钻(定向、非定向侧钻、侧钻水平井、分支井)已越来越多的用于油田开发。而侧钻小井眼井油层套管内径小,相应的修井工艺技术及井下工具极其贫乏。本文从现场实例应用出发,介绍了小井眼解卡打捞技术。 相似文献
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本文主要以明16块为例讨论高含水油田剩余油开采问题。和其它高含水油田一样,明16块的剩余油主要分布在构造高部位,我们通过精细构造解释,作大比例目的层构造图,发现油井与断层之间仍有构造高点存在,利用侧钻技术和在报废井位置上对已知的构造高部位实施侧钻,这样就可以钻遇较多油层,更大限度的提高采收率。 相似文献
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胜利油田孤东采油厂七区西单元经过二十多年的强注强采,目前已进入特高含水开发阶段,剩余油在平面上高度分散,采用常规方法挖潜在适应性和经济效益等方面已很难适应油田开发的需要。而长期报废停井附近区域由于井网失控、水线绕流等原因,形成剩余油滞留区,成为剩余油挖潜的又一增长点。因此,孤东采油厂利用报废油井,在七区西单元开展了开窗侧钻水平井挖潜试验,并取得了良好的经济效益。试验表明,对于高含水油藏,在应用开窗侧钻水平井技术后,油藏的整体采收率得到了进一步提高,且有较大的剩余油挖潜空间,该技术在这类油藏上具有较好的推广应用价值。 相似文献
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文13-侧356井是中原油田为了挖掘文13断块剩余油,提高老油区产量,而部署的文东盐间高压区块第一口深部套管开窗侧钻井。针对该井侧钻位置深、地层可钻性差、文九盐井段不易侧钻、地层压力系数高、施工泵压高、裸眼段长轨迹不好控制等诸多难点,施工中从套管开窗工艺、侧钻及井眼轨迹控制、钻头优选、钻井液优选、完井等几方面采取相应的技术措施有效的解决了上述问题。 相似文献
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孤东油田曲流河点坝构型分析及其应用 总被引：1，自引：0，他引：1
七区西52 3单元主力油层522层是典型曲流河沉积,其主体是点坝的连片沉积,点坝砂体由侧积体、侧积层、侧积面三要素组成.采取三种方法计算活动河道宽度,利用Leeder公式计算出本区单一侧积体的水平宽度为200米左右,侧积层倾角30～50.结合侧积体展布特征和剩余油分布规律,在七区西52 3层实施水平井和整体堵水调剖潜施,取得了较好效果. 相似文献
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XX油田经过多年开发生产,由于地质、工程等原因,很多油井、注汽井闲置或报废,造成局部地区井网不完善,油层动用程度较低。近几年来,随着侧钻工艺及其配套技术不断地发展并成熟化,利用侧钻井技术恢复停产井、完善层系井网已取得了较好的效果,同时也为XX油田剩余油挖潜开创了一条新路。目前侧钻井技术已成为老油田剩余油挖潜的重要手段,具有极大的发展前景和推广价值。 相似文献
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路晶鑫 《科技成果管理与研究》2010,(8):55-57
本文利用正交设计思想和数值模拟技术对影响水平井挖潜曲流河点坝砂体剩余油的影响因素做了研究,指出夹层特征是影响挖潜效果的主要因素。对水平井挖潜点坝砂体剩余油的机理进行了详细分析,夹层相对重叠长度综合反映了侧积夹层的各个特征,其大小决定了底水的脊进程度,直接影响挖潜效果。优化射孔也可以改善底水脊进程度,提高开发效果。 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
18.
《中国科学院院刊(英文版)》2014,(3)
<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence 相似文献
19.
Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels 总被引：1，自引：0，他引：1
《中国科学院院刊(英文版)》2014,(3):267-268
<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese 相似文献
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WANG Sijia 《中国科学院院刊(英文版)》2014,(2):192-194
<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages. 相似文献