【摘 要】
：
In view of the inadequate cementing quality in the cementation for long isolation intervals of oil and gas wells,and considering the field practice in Tarim Oil
【机 构】
：
School of Petroleum Engineering,China University of Petroleum,Dongying,Shandong 257061,China
论文部分内容阅读
In view of the inadequate cementing quality in the cementation for long isolation intervals of oil and gas wells,and considering the field practice in Tarim Oilfield,a nanometer material LC-212 was introduced as the base stock to experimentally develop a new spacer system NMS-I,in combination with other materials,including a chemical gel plugging agent,carboxymethyl cellulose and barite. Experimental results indicated that the system had a wide adjustable range of density,good rheological property,static stability and compatibility with cement slurry. It also showed no flocculating or thickening effect on the water-base drilling fluid and low-density cement system. Meanwhile,the capacity of lost circulation control and the influence of the spacer on the second interfacial cementing strength were evaluated by a self-made lost circulation simulator and shearing test facility. The results showed that the spacer had favorable plugging and flushing effect,and the second interfacial cementing strength can be greatly improved. Moreover,based on the experiments,the mechanisms of spacer function were analyzed. The results obtained from the investigation offer a novel approach to resolving some practical problems in cementing jobs.
其他文献
面神经炎在临床上是常见病,近年来发病有年轻化趋势.我院自2003年6月至2005年10月采用高压氧综合治疗面神经炎288例,疗效较满意.现报告如下。
世界卫生组织于2018年8月发布了"关于耐多药和利福平耐药结核病治疗重大变化"的文件，将长程耐多药结核病治疗方案推荐使用的药物分组进行了更新，重新分组后更加方便实用，增加了患者的依从性和疗效，但也出现价格昂贵、药物无法获得、注射类药物的取舍、组合方案的安全性及患者接受程度等问题。虽然这种分组在我国的实施会遇到不少问题，但对我国耐多药结核病治疗指南的制定提供了重要的参考价值。
小儿脑性瘫痪是指从妊娠到新生儿期,以各种原因所致的脑组织非进行性病变为基础,形成永存的运动和姿势异常的脑功能障碍综合征.临床上对小儿脑性瘫痪无特效方法,一般采取综合治疗(功能锻炼、针炙、药物及加强营养等).我院自1999年开始采用高压氧综合治疗小儿脑性瘫痪144例.现报告如下。
The concept of the three-layer structure of continental basins is presented based on the characteristics of layered structure of basins. The reservoir could be
The well known Cretaceous seaway in North America was recognized in the middle of the last century and the Palaeogene seaway in East China was proposed by the a
North Africa,which is one of the main oil and gas producing regions in the world,is best known for its sub-salt Paleozoic-Triassic reservoirs and Paleozoic sour
The geological background of the Subei basin is that of small relief subsidence,low geothermal gradient,multi-sedimentary hiatuses,intense reconstruction of the
The Z component and X component profiles of seismic waves extracted with the prestack Kirchhoff integral migration could approximate to the primary wave (P wave
This paper presents an overview of petrophysical research and exploration achievements of low resistivity pay (LRP) zone by well logs in China. It includes geol