作　　者： ; ;

机构地区： 中国石油天然气集团公司

出　　处： 《钻采工艺》 1999年第2期4-8,共5页

摘　　要： 利用水渗流模拟实验装置进行了压差与固井质量的关系，储层物性（主要是渗透率）、储层渗流速度与固井质量的关系等实验研究。结合现场调查和统计规律得出，高压层固井环空压差大于１ＭＰａ、低压层固井环空压差小于９０ＭＰａ的情况下，用Ａ级水泥原浆能够保证固井质量。在密井网条件下，水渗流流速在钻井固井过程中应控制小于１２０ｍ／ｄ，大于１２０ｍ／ｄ地层流体的水渗流将对固井声幅质量检测造成影响。提出了地层中水渗流主要影响水泥的溶解结晶机理，对局部化学反应影响较小。地层流体渗流损害水泥环胶结质量的机理是溶解迁移机理，水渗流通过改变溶解速率和迁移速率来影响水泥环的胶结质量，其溶解速率由迁移速率所决定。 Experiment has been carried out to study the relationship between differential pressure and cementing quality,between the physical properties of the reservoir(mainly of permeability),osmosis velocity and cementing quality etc..With investigation and statistics on the well site,grade A cment can enssure cementing quality if a layer of high pressure formation is cemented with annular pressure difference above 1 MPa,a layer of low pressure formation is cemented with annular pressure below 9 0MPa.For dense well pattern,osmotic velocity should be controlled below 1 20m/d while cementing,otherwise will affect CBL (cement bonding logging).Meanwhile,this paper has also studied the dissolving and crystallizing mechanism of cement affected by the seepage of formation fluid,and the seepage has a little effect on local chemical reaction.The mechanism of formation fluid damaging cementing quality is changing dissolving velocity and migration velocity,and dissolving velocity depends on migration velocity.

关 键 词： 固井 压差 水渗流 模拟 钻井泥浆 胶结

领　　域： [石油与天然气工程] [石油与天然气工程]