In- Depth Colloidal Dispersion Gels Improve Oil Recovery Efficiency

Daqing Oilfield has carried out the production of polymer flooding was promoted since in 1996.Presently, polymer flooding is very successful in several production plants of Daqing Oilfield, and getting into industrialisation production. It has played a very important role in maintaining the oilfield stable production of over 50 million tons of oil.But the high permeability variation is serious, resulting in polymer production in some production wells recylingly and production concentration increasing slowly, which adversely affects polymer flooding efficiency.Colloid dispersion gels (CDG) is a unique in- depth permeability modification process. It can reduce in- depth reservoir permeability variation by moving into highly permeable, water saturated zones and providing high resistance to subsequent water injection in those zones, so that oil can be produced from tighter rock. So CDG can enlarge volumetric sweep, and improve oil recovery efficiency.We had a CDG pilot programme in Daqing Oil Field in 1999, now this pilot has been entering into effective period with produing more oil and less water.Introduction     

锂离子二次电池聚合物电解质的研究进展

简要介绍了锂离子电池和锂离子电池电解质的发展概况,锂离子电池电解质的分类,并重点介绍了聚合物电解质的性能特点,讨论了聚合物电解质中锂盐、聚合物、增塑剂和无机添加剂对电解质的影响,指出通过各组分性能的互补,是获得高导电性及机械性能聚合物电解质的有效手段,并展望了锂离子电池电解质的发展前景。     

POLYMER CHARGE AND MOLECULAR WEIGHT EFFECTS ON TREATED IRRIGATION FURROW PROCESSES

lINTRODUCTIONFurrowirrigationsupplieswatertotheheadofindividuallyformedsoilchannelsataratethatmatchesorexceedsfurrowinfiltrationcapacity,sothatwateradvancesdownslopethroughthefieldtothefurrowoutflow.Increasinginflowrateincreasesstreamdepth,wettedperimeter,velocity,andfurrow-streamadvancerate.Thisincreasesinfiltrationandimprovesirrigationapplicationuniformity.However,boostinginflowsalsoincreasesthestream-shydraulicshearandsoildetachmentrate,andsedimentconcentration,transport,andfieldlosses…     

STW型生态土壤稳定剂改良工程粘性土胀缩性试验研究

针对STW型生态土壤稳定剂改良粘性土的胀缩性进行了试验研究。实验结果表明:STW型土壤稳定剂可以有效地改良粘性土的胀缩性;土颗粒粒径的大小、稳定剂的掺量对改良粘性土的胀缩性均有不同程度的影响;在平均粒径为0.75mm时,改良土和素土的无荷膨胀率均达到最低值;改良土的胀缩性随着稳定剂掺量的增大而减小。     

新型高分子固化材料耐老化性能的试验研究

因一般高分子材料容易老化 ,尤其是在沙漠环境下 ,强烈的热光辐射、氧化更加速其老化过程。SH为新型高分子固化材料。本文通过SH固化沙体的室内老化试验 ,初步研究了SH的耐老化特征。结果表明 ,在间断或连续紫外线辐照下 ,SH耐老化性能优于同类其他固沙剂 ,可用于沙漠地区固沙     

膨润土深加工的研究进展

由于膨润土具优良的物化性能、丰富的资源、低廉的价格,使得国内外有关科技人员对其深加工的方法和技术进行了大量的研究。在膨润土的提纯、钙基膨润土的钠化和活性白土的制备、各种有机膨润土的制备、膨润土凝胶的制备、用膨润土制备白炭黑等各种膨润土深加工的方法和技术,以及目前国际上研究的热点:柱撑粘土材料的制备和有机-无机纳米复合材料的制备等方面都有一定的进展。柱撑粘土是一种具有很高催化裂化活性的类分子筛新型固体酸催化材料,也是一种优良的新型环保材料。有机-无机纳米复合材料（纳米粘土）既具有粘土矿物的优良强度和尺寸稳定性,又具有聚合物断裂性能、可加工性和介电性能。膨润土的深加工技术开辟了非金属矿综合利用的新途径。     

Influence of adsorbed polysaccharides and polyacrylamides on talc flotation

The adsorption and action of various polymers on talc has been investigated. Two families of polymers (starch-based polysaccharides and synthetic polyacrylamides) with specific molecular weights and functional group chemistry were studied. Adsorption isotherms, acoustophoresis, and contact angle studies enabled polymer adsorption behaviour, adsorbed layer thickness, and the hydrophilicity of the polymer-treated talc surface to be determined. Flotation testing on the treated talc revealed a hierarchy of effectiveness within the group of polymers studied. The observed trends in flotation performance are discussed with reference to the measured polymer layer properties. A 3D correlation plot of adsorbed layer thickness and contact angle against flotation recovery indicates that it may be feasible to predict an order of effectiveness for polymeric depressants based solely on measurements of the adsorbed layer properties, without recourse to flotation testing. This approach would be desirable when screening large numbers of potential depressants.     

文登市建设用地耕作层土壤剥离工作探讨

山东省文登市耕地面积6.2137万hm2,人均耕地不足0.097 hm2,耕地后备资源稀缺,土地供需矛盾日益突出。随着经济社会快速发展,全市建设项目占用耕地数量逐年增加。近年来,文登市在被占用耕地耕作层土壤剥离方面作了一些探索,取得了较好成效,走出了一条活用表层熟土再造肥田沃土的新路子。     

文登市建设用地耕作层土壤剥离工作探讨

山东省文登市耕地面积6.2137万hm2,人均耕地不足0.097 hm2,耕地后备资源稀缺,土地供需矛盾日益突出。随着经济社会快速发展,全市建设项目占用耕地数量逐年增加。近年来,文登市在被占用耕地耕作层土壤剥离方面作了一些探索,取得了较好成效,走出了一条活用表层熟土再造肥田沃土的新路子。