耐高温泡沫钻井液技术研究概况及研究方向探讨   总被引：4，自引：0，他引：4  

董海燕 《地质与勘探》2014,50(5):991-996

耐高温泡沫钻井液是对深井、超深井、高温地热井、干热岩等资源开采,特别是超高温资源的开采有效的钻井液之一。本文在分析耐高温泡沫钻井液面临的主要问题的基础上,对国内外抗高温泡沫处理剂、耐高温泡沫钻井液体系应用情况进行了介绍。深井、超深井、干热岩、地热井等钻探中会面临超高温、低压易漏地层,因此对低密度钻井液体系的要求也越来越高,主要技术难点是高温、低压,窄密度窗口钻井液的性能的控制。结合对耐高温泡沫钻井液主要技术难点的分析以及高温对泡沫钻井液的要求,综合目前耐高温泡沫钻井液技术的发展,由此得出：耐260℃以上抗高温、低密度泡沫钻井液处理剂及体系,耐高温泡沫钻井液测试仪器及评价方法是未来抗高温钻井液发展的方向。  相似文献   

羟基磷灰石对水溶液中Fe³⁺的吸附动力学及热力学研究     

周珍旭  钱功明  李道  王发杰 《岩石矿物学杂志》2014,33(6):1157-1160

研究了羟基磷灰石(HAP)对水溶液中Fe3+的吸附动力学及热力学。研究表明,HAP对水溶液中Fe3+的吸附符合Langmiur等温吸附,ct/q=0.006 4 ct+0.018 3;该吸附反应符合一级反应动力学方程,ln CR=-0.043 5 t+4.324 4;吸附反应活化能为Ea=36.26 k J/mol;标准摩尔反应焓为正值表明反应过程吸热;当温度大于285.7 K时,吉布斯自由能小于0,反应可自发进行。  相似文献   

Geochemical process of fluorine in soil     

Xiaojing Liu  Binbin Wang  Baoshan Zheng 《中国地球化学学报》2014,33(3):277-279

Fluorine is in the dynamic balance of two geochemical processes, enrichment and leaching, reflecting the adsorption and desorption of fluoride by clay minerals, respectively. The two geochemical processes of fluorine in soil are influenced by factors including geochemical characteristics of soil and clay minerals, pH and sanity of soil solutions, climate, grazing and agriculture activities. Main factors controlling enrichment and leaching process of fluorine in soil can be found with interaction consideration.  相似文献   

Preparation of Silver Nanoparticles Film and the Adsorption of Iodide     

GAO Can  HU Yaoqiang  ZHANG Huifang  YE Xiushen  LI Quan  LIU Haining  WU Zhijian 《《地质学报》英文版》2014,88(Z1):313-314

正Iodine and iodine compounds are widely applied in medicaments,dyes,energy materials,food additives etc.The development and utilization of iodine resources have attracted much attention.A large amount of iodide is  相似文献   

A REVIEW OF HEAVY METAL ADSORPTION BY MARINE ALGAE     

潘进芬  林荣根  马丽 《中国海洋湖沼学报》2000,18(3):260-264

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｔｏｘｉｃｉｔｙｏｆｈｅａｖｙｍｅｔａｌｓｒｅｌｅａｓｅｄｉｎｔｏｔｈｅｅｎｖｉｒｏｎｍｅｎｔｈａｓｒｅｃｅｎｔｌｙｔｒｉｇｇｅｒｅｄａｎｕｍｂｅｒｏｆｓｔｕｄｉｅｓａｉｍｉｎｇａｔｔｈｅｒｅｍｏｖａｌｏｆｍｅｔａｌｉｏｎｓｆｒｏｍａｑｕｅｏｕｓｓｏｌｕｔｉｏｎｓ (ＦｏｕｒｅｓｔａｎｄＶｏｌｅｓｋｙ ,1 997;ＦｅｈｒｍａｎｎａｎｄＰｏｈｌ,1 993 ;ＫｕｙｕｃａｋａｎｄＶｏｌｅｓｋｙ,1 989) .Ｉｔｗａｓｆｏｕｎｄｔｈａｔｔｈｅａｃｃｕｍｕｌａｔｉｏｎｏｆｈｅａｖｙｍｅｔａ…  相似文献   

Parameters affect foaming and foam stability during foam drilling     

Hazaea Mohammed  Youhong SUN  Ould El Houssein Yarbana 《世界地质(英文版)》2007,10(2)

The authors presented indoor practice experiments of parameters affect on foaming and foam stability. Experiments were carried out and special equipments were used to determine foaming and foam stability; tests were tabulated and charted. The effects of chemical and physical parameters on foaming and foam stability have been conducted.  相似文献   

EFFECTS OF COMPOSITION AND STRUCTURE OF ALGINATES ON ADSORPTION OF DIVALENT METALS     

郑乃余  张燕霞  范晓  韩丽君 《中国海洋湖沼学报》1994,(1)

Results of a series of experiments(on the adsorption of divalent metal ions by dried alginic acid, Na and Ca alginates of different composition and block structure) conducted in this systematic study of the effects of the composition and structure of alginates on the static adsorption equilibrium of divalent metal ions indicate that the properties of alginate adsorption to divalent metal ions are highly different, depending not only on the cations used, but also on the form and structure of the alginates. There is close correlation between the adsorption properties and the structure of the alginates. The selectivity coefficient of Na alginate for Cd-Sr ion exchange tends to increase with the increase of the M/G ratio in alginate, whereas the adsorption capacity of Ca alginate for Cu~(2+) ion decrease with the increase of the G-block or the average length of the G-block ((?)_G) and the total adsorption capacity of alginic acid is found to vary in the same order as the F_(MM)(diad frequency) in alginate in  相似文献   

Biodegradation and transport of benzene,toluene, and xylenes in a simulated aquifer: comparison of modelled and experimental results     

Jiin‐Shuh Jean  Ching‐Lang Tsai  Shen‐Haw Ju  Chun‐Wen Tsao  Shih‐Ming Wang 《水文研究》2002,16(16):3151-3168

Both laboratory experiments and numerical modelling were conducted to study the biodegradation and transport of benzene–toluene–xylenes (BTX) in a simulated semi‐confined aquifer. The factors incorporated into the numerical model include advection, hydrodynamic dispersion, adsorption, and biodegradation. The various physico‐chemical parameters required by the numerical model were measured experimentally. In the experimental portion of the study, BTX compounds were introduced into the aquifer sand. After the contaminants had been transported through the system, BTX concentrations were measured at 12 equally spaced wells. Subsequently, microorganisms obtained from the activated sludge of a sewage treatment plant and cultured in BTX mixtures were introduced into the aquifer through the 12 sampling wells. The distribution data for BTX adsorption by the aquifer sand form a nonlinear isotherm. The degree of adsorption by the sand varies, depending on the composition of the solute. The degradation time, measured from the time since the bacteria were added to the aquifer until a specific contaminant was no longer detectable, was 35–42 h for BTX. The dissolved oxygen, after degradation by BTX compounds and bacteria, was consumed by about 40–60% in the entire simulated aquifer; thus the aerobic conditions were maintained. This study provides insights for the biodegradation and transport of BTX in aquifers by numerical modelling and laboratory experiments. Experimental and numerical comparisons indicate that the results by Monod degradation kinetics are more accurate than those by the first‐order degradation kinetics. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   

无砟轨道聚氨酯碎石防水联结层单元模型试验研究     

谢康  苏谦  陈晓斌  刘宝  王武斌  王迅  邓志兴 《岩土力学》2023,(8):2308-2317

基于无砟轨道基床表层水力损伤病害产生机制,提出一种在基床表层上设置聚氨酯碎石防水联结层的水力损伤控制措施。通过建立级配碎石组(J-0)、透水型聚氨酯碎石组(J-5)及致密型聚氨酯碎石组(J-10)3组试验模型,研究聚氨酯碎石防水联结层的静动力特性、疲劳特性与防水特性。结果表明：静力加卸载作用下,J-10残余应变为2.6×10–6,最大位移约为1.0 mm,与下部基床表层级配碎石层变形适应性良好,耗能效果明显,在列车动力荷载水平作用下,可减小基床表层动变形与动应力幅值,增大动应力扩散范围;在长期动力循环荷载作用下,J-0与J-5在注水后结构层动力响应显著增大,而J-10动力响应在加载次数1～2万次后基本保持稳定;试验过程中J-10能够有效防止水分进入基床表层级配碎石层,而J-0与J-5水分不断下渗,引起级配碎石细颗粒损失。研究成果对整治多雨地区无砟轨道基床表层水力损伤病害具有重要的应用价值。  相似文献   

载炭泡塑吸附-电感耦合等离子体发射光谱法测定金矿石的金量   总被引：1，自引：1，他引：0  

陈景伟  李玉明  宋双喜  宋江涛  初琳 《岩矿测试》2015,34(3):314-318

载炭泡塑吸附法对金有良好的吸附性能,但只能用于抽滤吸附不能振荡吸附,分析手续繁杂。本文以载炭泡塑振荡吸附-电感耦合等离子体发射光谱法测定金矿石的金量。样品在650℃高温灼烧2 h,用50%王水和10%氯化铁加热溶解,溶液冷却后加入5%高锰酸钾氧化,用中密度规格的载炭泡塑两次振荡吸附溶液中的金,然后于580℃高温灼烧后以50%王水溶解灰分,直接用ICP-OES测定金量。方法检出限(3σ)为0.002μg/g,精密度(RSD,n=11)小于3.7%。本方法对金的吸附率大于99.9%,测定范围为0.01~90μg/g,对不同类型金矿石的适应性强,解决了以往泡塑吸附法吸附率较低、标准系列与样品需同时预处理的问题,对低含量和高含量样品均有较高的准确度。  相似文献