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固井质量
    Research on the Effection of Interlayer Pressure Difference on the Quality of Well Cementing
    层间压差对固井质量影响规律研究
    Two Methods of Evaluating The Effect of Drilling Fluids on the Quality of Well Cementing
    两种评价钻井液对固井质量影响的实验方法
    At the same time use established relation between centering degree and cementation index of casing string to simulate and forecast the cementation index of uncemented well, so that the quality of well cementing can be checked.
    同时还可以根据建立的套管串居中度与胶接指数关系来模拟预测待施工井的胶接指数,来确定固井质量的好坏。
    It is shown that the low density cement slurry not only meet the need of cementing low-pressure lost-circulation zones, but also enhance bonding between cement and casing/wellbore and improve the quality of well cementing.
    并且该水泥浆体系的流动性好、析水率小、稠化时间可调,水泥浆凝结后的水泥石不但抗压强度高,而且还具有一定的体积膨胀率(0.4~2.2%),能完全适用低压易漏地层等复杂井况低密度固井的要求,并保证水泥环与地层、套管间的良好胶结,提高固井质量
    Based on the analysis of the laboratary experiment and field data, this paper deals with the physical features of the low permeability and high pressure leyer and the mechanism affacting the quality of well cementing.
    通过对室内试验和现场实际资料分析,阐述了低渗高压层的物理特征及其固井质量影响的因素。
    The lowest formation porosity pressure factor to affect the quality of well cementing is 1.46. For the well whose highest formation porosity pressure factor of the whole well is higher than 1.64 , high intensity antichannel is added to the mud, combined with the method of casing pipe restricted to cement well. In 40 wells cemented by the method, the ratio of the high quality well is 97.5%.
    影响固井质量的最低地层孔隙压力因数为146。 对全井最高地层孔隙压力因数大于164的井,在水泥浆中加入了高强度锁水抗窜剂,并配合使用了套管外封隔法进行固井,40口井的优质率达到975%。
    In view of foe problem that excessive impurity and agglomeration in the cement have great influence on the quality of well cementing, a cement self-synchronizing reciprocating line shale shaker is developed based on the working principle of drilling fluid straight line shale shakers.
    针对目前固井水泥中结块、杂质等过多,严重影响固井质量的问题,根据钻井液直线振动筛的工作原理,研制出水泥自同步直线振动筛。
    Cementing well by using slag slurry in whole length can improve the quality of well cementing and reduce the cost of it.
    以低密度矿渣水泥浆研究结果为基础 ,设计高密度水泥浆 ,使油气井全井段使用矿渣水泥浆固井 ,以提高固井质量 ,降低固井成本 .
    Stress concentration around the wellbore becomes much complex when the quality of well cementing is improved and the well depth is increased, which makes the stress concentration around the perforated wellbore important enough to be noticed.
    随着固井质量提高和射孔深度加大 ,井周应力集中变得复杂 ,射孔壁的应力集中已不容忽视。
    Special well drilling, production well life and the long-term benefit of oilfield exploration and development are directly influenced by the quality of well cementing.
    固井质量问题在石油勘探开发中备受关注,对特殊工艺井钻井、油水井开采寿命和勘探开发效益有直接 的影响。
    Drilling fluids have various effects on the quality of well cementing.
    钻井液对固井质量的影响是多方面、多因素的。
 

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