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951.
川东北元坝地区二叠系长兴组台地边缘暴露礁滩、礁后暴露浅滩白云岩优质储层发育。通过对元坝20 多口钻井数百米岩芯的观察和描述及1 000 多块铸体薄片的鉴定分析发现,储层储集空间类型众多,主要有白云石晶间孔、生物体腔孔、生物格架孔、生物粒间孔及其相应溶孔和裂缝等,其中生物溶孔及具生物成因的次生孔、洞是元坝长兴组礁滩及礁后浅滩储层的优势储集空间;少部分次生孔隙由白云石化、溶蚀作用和重结晶作用等直接形成,多数次生孔隙由生物孔隙经白云石化、溶蚀作用和重结晶作用改造后形成;生物成因孔隙的发育除受生物自身矿物组分、结构、形态等内因的控制外,归根结底受沉积相及建设性成岩作用的控制;生物及其溶孔发育是川东北元坝地区长兴组台缘礁滩及礁后暴露浅滩优质储层发育的主控因素之一。 相似文献
952.
随着钻完井技术的发展,采用水平井开发底水油藏成为提高产量、降低成本的有效途径,但是在生产过程中也暴露出日益严重的问题,主要为含水上升快、无水采收期短、完井方式不适应开发的需要和产能预测不准确等。在总结水平井产能预测模型的基础上,采用井筒与油藏耦合作用下的水平井不稳定产能预测数学模型,借鉴Cinco H等人求解有限导流垂直裂缝压裂井压力动态的计算方法,建立产能预测计算模型。该模型考虑底水驱油藏水平井情况,通过对不同完井方式下的表皮系数分解计算,开展了不同完井方式下的产能预测研究,这些研究结果对水平井完井方式优选和水平井油藏工程研究具有重要的指导意义。 相似文献
953.
Catherine Doherty Paul Shield Wendy Patton Guanglun Michael Mu 《Community, Work & Family》2015,18(1):100-116
Australia faces an ongoing challenge recruiting professionals to staff essential human services in rural and remote communities. This paper identifies the private limits to the implicit service contract between professions and such client populations. These become evident in how private solutions to competing priorities within professional families inform their selective mobility and thus create the public problem for such communities. The paper reports on a survey of doctors, nurses, teachers and police with responsibility for school-aged children in Queensland that plumbed the strength of neoliberal values in their educational strategy and their commitment to the public good in career decisions. The quantitative analysis suggested that neoliberal values are not necessarily opposed to a commitment to the public good. However, the qualitative analysis of responses to hypothetical career opportunities in rural and remote communities drew out the multiple intertwined spatial and temporal limits to such public service, highlighting the priority given to educational strategy in these families’ deliberations. This private/public nexus poses a policy problem on multiple institutional fronts. 相似文献
954.
Early career occupational mobility of Turkish and Moroccan second-generation migrants in Flanders,Belgium 总被引:1,自引:0,他引:1
This article analyses the early career occupational mobility of people from a Turkish or Moroccan descent in Flanders (Belgium). Previous research showed that second-generation migrants are less successful than natives when entering the labour market. We compare the progress in socio-economic status (SES) that youngsters of native and non-native descent make from their first to later jobs at the start of their career. Both second-generation immigrants and native majority young adults experience upward occupational mobility during this crucial phase of their occupational career. The gap between native and ethnic minority youth, however, does not narrow over the course of the years. The first job offers less SES for non-natives compared to that of natives, and the minority-native gap in occupational attainment remains constant afterwards. The future career is largely determined by the characteristics of the start of the occupational career, and educational attainment even before. Promising, however, might be the finding that a first job with a relative low occupational status does offer better opportunities for Turkish and Moroccan second-generation migrants than for native majority youth to do some catching up later on. In combination with a long-term negative impact of initial unemployment, ethnic minority youth perhaps are best off with starting to work as soon as possible after school leaving. 相似文献
955.
民族地区的素质教育关系到中华民族的整体素质,关系到中国的未来和发展,对实现中华民族的伟大复兴将产生重大而深远的影响。针对我国民族地区素质教育中存在的问题,采取切实可行的措施,加快民族地区素质教育的改革步伐,对落实科学发展观、全面建设小康社会,均具有极其重大的意义。 相似文献
956.
文化产业作为21世纪的朝阳产业在国内已经蓬勃发展十余年,在扩大消费、拉动内需、调整结构、促进增长等方面发挥着越来越重要的作用。但我国地域广阔,民族众多,经济发展各异,文化多种多样,所以文化产业在各地区的发展并不平衡。与其他国家相比,我国文化产业的发展远远低于发达国家和部分新兴市场国家。2011年至2013年是我国发展文化产业"十二五倍增计划"承上启下的一个重要时间段。基于2011-2013年我国内地31个省(市)的基础数据,运用因子分析,构建相应的模型,从地域的视角对我国东部、中部、西部、东北等四大区域的文化产业的发展进行分析评价,找出四个区域间文化产业发展的主要差异及形成的原因,并在此基础上提出相应的建议。 相似文献
957.
958.
Ethan Blue 《National Identities》2015,17(2):175-194
In the early twentieth century, the United States developed an integrated, continental deportation network based on rail travel. This new state apparatus would enable the restrictionists’ dream of immigration control and speed the elimination of those they deemed unfit for American life. It set a template for mass removal that would expand in the century to come. Scholars of immigrant detention and removal commonly employ Victor Turner’s concept of liminality to understand migrant experiences, but this paper suggests the need for an expanded theorization of the liminal as manifold rather than singular. Drawing on deportee case files and literature from the early twentieth century, this paper explores the complex, variegated and painful liminalities of the deportation journey. It argues that power affected deportees’ experience of space and time across different liminal zones and interprets the embodied catastrophe of deportation for migrant communities. If traumatic experiences reconfigure the meaning of time into a ‘before’ and ‘after’, deportation was an ongoing catastrophe that offered little sense of completion. 相似文献
959.
960.
葛红 《安徽农业大学学报(社会科学版)》2006,15(6):91-92,127
本文从用人单位反馈的“应届大学毕业生实践动手和创造能力较弱”的问题入手,分析了制约大学生实践能力培养的主要因素,提出了强化大学生实践能力培养的途径与方法。 相似文献