贝克石油工具公司推出新型油藏优化系统     

李晓兰摘编 《海洋地质译丛》2008,(1):46-46

在2007年SPE年会上，贝克石油工具公司发布了最新设计完成的油藏优化系统EQUALIZER。该系统可以有效地解决水平井、多分支井和大斜度井出现的早期水气突破等完井问题，延长油井寿命，利用较少的井眼与油藏保持更大的接触面积，最大限度地提高油气采收率，增加油田的经济效益。  相似文献   

Heavy metals,polycyclic aromatic hydrocarbons and organochlorine pesticides in the surface sediments of mangrove swamps from coastal sites along the Leizhou Peninsula, South China     

TANG Yijie  FANG Zhanqiang  YU Shixiao 《海洋学报(英文版)》2008,27(1):42-53

Contents of heavy metals, polycyclic aromatic hydrocarbons （PA Hs）, dichlorodiphenyltrichloroethanes （DDTs） and hexachlorcy- clohexanes （HCHs） in surface sediments from mangrove areas of the Leizhou Peninsula were analyzed in July and November 2005. Risk assessment criteria applied by Long E R et al. （1995） and Long E D et al. （1995） （effects range low, ERL; effects range mean, ERM） of chemicals in sediments from the gulf or estuary were used to assess the potential ecological risks of heavy metals, PAHs, DDTs and HCHs to aquatic organisms in the studied area. The results indicated that the average contents of zinc, nickel, chromium, lead, copper, arsenic and mercury were （61.97 ± 55.87）, （59.99 ± 39.01 ）, （47.93 ± 28.37）, （26.64± 13.00） , （23.45 ± 41.96）, （9.32 ± 3.62）, （0.14 ± 0.18） mg/kg in dry weight in the sediment samples col- lected from five studied sites in the Leizhou Peninsula, respectively. Cadmium was not calculated due to its content being below the detection limit （ 〈 0.3 mg,/kg）. The average levels of Cr, Cu, Ni, Pb, Zn and Hg exceed their background values. The average contents of Ni were higher than ERM. The contents of PAHs in the sediments from the five studied sites were （79.78 ± 43.70） ng/g in dry weight, far lower than ERL（4 022 ng/g）. The contents of DDE, DDD and DDTs in the sediments from five studied sites were （2.60 ± 4.68）, （ 17.52 ± 27.25 ）, （27.78 ± 46.64） ng/g in dry weight respectively, clearly higher than ERL, and the average contents of DDT were （7.66 ± 15.93） ng/g in dry weight, much higher than ERM. HCHs could be detected in the sediments only from Gaoqiao sampling site, with the average contents （0.07 ± 0.08） ng/g in dry weight.  相似文献   

Preliminary Study on Applicability of Microsatellite DNA Primers from Parasite Protozoa Trypanosoma cruzi in Free-living Protozoa   总被引：1，自引：0，他引：1  

ZHANGWenjing YUYuhe SHENYunfen MIAOWei FENGWeisong 《中国海洋大学学报(英文版)》2004,3(1):80-84

1　Introduction　Generallyknownasacodominantgeneticmarker ,microsatellitehasbeenwidelyusedinstudiesonpopu lationgenetics,high resolutiongenotyping ,genemap ping ,evolution ,linkageanalysis ,conservationbiology ,behaviouralecology ,relationsbetweenparasite…  相似文献   

海上高温低渗油田酸化技术应用研究     

彭雪飞  ;冯浦涌  ;黄雷  ;张海  ;司念亭  ;李君宝 《海洋地质译丛》2008,(2):73-76

针对渤中34油田油藏孔隙度渗透率比较低、温度比较高（大于120℃）的特点，结合储层伤害原因分析，根据室内试验结果，采用多氢酸体系对渤中34油田的油井进行酸化增产作业。通过对渤中34油田5口井（均为新井，完井后基本不出液）的酸化施工，酸化成功率达到100％，酸化后各井均达到甚至超过配产要求，这表明多氢酸体系对于高温低渗砂岩地层，能够有效地解除钻完井过程中造成的污染。与常规酸液体系相比，多氢酸体系具有明显的优势且效果明显，对于类似海上油田酸化有较强的借鉴意义。  相似文献   

厦门西海域表层沉积物中多环芳烃含量分布及生态风险评价   总被引：2，自引：0，他引：2  

黎晓霞  蔡河山  张珞平 《热带海洋学报》2008,27(5)

2004年11月30日至12月1日连续两天采集厦门西海域10个站位表层沉积物样品,参照美国EPA标准方法及采用气相色谱与质谱联用(GC/MS)技术,对表层沉积物样品中的多环芳烃(PAHs)进行测定分析.结果表明,厦门西海域表层沉积物样品中16种PAHs的总含量为198.2-1061.6 ng·g-1,平均值为723.51 ng·g-1,能检出的PAHs均以2-4环的芳香物为主;10个站位中X1、X2、X3、X6及M2站位的PAHs主要来源于化石燃料的不完全燃烧,其他站位以石油泄漏为主要来源.对PAHs的生态风险评价结果表明,厦门西海域表层沉积物中PAHs的环境毒性相对较低,说明该海域表层沉积物中PAHs对生物的危害程度较轻.  相似文献   

Formation and early development of tetraspores of Polysiphonia urceolata （Rhodomelaceae, Rhodophyta）     

姚建亭  李大鹏  于深辉  刘吉东  段德麟 《中国海洋湖沼学报》2009,27(2):365-369

Polysiphonia urceolata is one type of potential commercial red seaweeds used for breeding and cultivation, because of its significant biochemical and biomedical application. However, the information of breeding and seedling incubation for cultivation is limited, especially the early development. In this study, tetrasporohyte and gametophyte of P. urceolata were taken as the study materials in Huiquan Bay, Qingdao, China. The cleaned and sterilized tetrasporophytes and gametophytes were pre-cultured in sterilized seawater, then nurtured at 18°C, 25 μmol photons m⁻² s⁻¹ in 12:12 h (light:dark) photoperiod. Continuous observation under microscope showed that the early development consists of bipolar division stage and seedling stage. In the division stage, tetraspores germinate into bipolar sporelings that further differentiate into a colorless rhizoidal portion and a lightly pigmented upright shoot. The lightly pigmented rhizoidal cell develops to a rhizoid and the larger pigmented cell transforms to an erect axis. In the seedling stage, several quasi-protuberances appear on the erect axis and form juvenile seedlings. The results demonstrate the culture of P. urceolata from tetraspores under laboratory conditions. Supported by National Key Technology Support Program, Development Program of China (No.2006AA09Z21), National Natural Science Foundation of China (No. 40618001 and N_CUHK438/06) and Shandong Agricultural Seed Stock Breeding Project  相似文献   

黑龙江省海林市新兴林场一带金、多金属矿成矿规律与找矿靶区选择     

蒋世军 《黑龙江国土资源》2007,(5):47-47

黑龙江省海林市新兴林场一带地处小兴安岭-张广才岭贵金属、有色金属成矿带的南段，大地构造位置属兴凯湖-布列亚山地块区张广才岭-太平岭边缘隆起带。张广才岭边缘隆起中部，本区先后经历了张广才岭期、加里东期、印支期、燕山期的演化，地质构造背景较复杂，出露有新元古界张广才岭群、古生界、中生界及张广才岭期、印支期、燕山期侵入岩，并伴有中—低温成矿作用，变形构造以南北向线型紧密褶皱为主。  相似文献   

气候的变暖导致青藏高原冻土呈逐渐退化趋势     

《国土资源》2004,(12):50

受全球气候变暖的影响，青藏高原冻土近年呈逐渐退化趋势。在退化过程中，冻土涵养水源的功能减弱或丧失，从而引发和加剧了青藏高原高寒草地的退化，并有可能造成青藏高原生态的进一步恶化。  相似文献   

普查硫化矿藏时Mпп负异常的作用     

A.И.ВaЛaKUH И 《物探化探译丛》1990,(1):39-40

  相似文献   

多源异构空间数据集成工具系统的设计与研究   总被引：2，自引：1，他引：1  

张怡鹏  高德政 《测绘通报》2009,(2)

随着GIS的社会化发展,空间数据共享成为一种必然要求,然而由于空间数据格式及模型的多样性,要真正实现空间数据共享,多源异构空间数据集成是一个亟待解决的问题.针对国内相关行业对数据整合应用的需求,设计一种多源异构空间数据集成工具,分析系统的主要技术以及系统总体框架.并以MapGIS数据集成为例,具体分析数据集成的关键技术.该系统满足了国内行业对数据处理的需求,提高了数据的应用效率.  相似文献