摘要
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。当环空压差小于－４０ＭＰａ、声幅在９０％以上时，液体在空套管内会形成窜槽现象。将环空压差为１０ＭＰａ定为最佳环空压力值。影响固井质量的最低地层孔隙压力因数为１４６。对全井最高地层孔隙压力因数大于１６４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９７５％。
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. When annulus pressure is lower than -4.0 MPa and acoustic amplitude is higher than 90%, the channelling will be formed in liquid casing pipe. The least annulus pressure is 1.0 MPa. 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%.
出处
《大庆石油学院学报》
EI
CAS
北大核心
1998年第2期27-28,共2页
Journal of Daqing Petroleum Institute
关键词
高压层
孔隙压力
固井质量
预测
油田
high pressure layer, pore pressure, quality of well cementing, annulus pressure, prediction
