LSS塑性水泥体系研究及提高固井质量探讨

RESEARCH ON LSS PLASTIC CEMENT SYSTEM

利用弹性理论分析固并后水泥环的应力变化,搞清水泥环封隔失效机理,并获得提高固井质量的途径。在此基础上研制出LSS塑性水泥体系。实践证明它优于常规水泥体系,可提高固井质量和水泥环封隔有效期。

This article analyses the stress change of cement sheath after cementing by using elastic theory, makes sure the failure mechanism of cement sheath plugging and obtains the way of improving cementing quality . On these basis, LSS plastic cement system is developed. Through practice, the results show that its property surpass regular cement system, and can improve cementing quality and the period of validity of cement sheath plugging.