文档介绍：油水井套管损坏的地质因素综合研究代丽(地质工程) 指导教师:徐守余(教授) 摘要油水井套管损坏一直是影响油田正常生产的严重干扰因素。本文对油水井套管损坏的类型进行检测和划分,归纳和总结了套管损坏的分布规律:对套管损坏的地质因素进行了分析研究,深入探讨了油水井套管损坏的动力学机制:运用多学科综合研究对油气田套管损坏提出针对性的预防措施。油水井套管损坏的形成受地质环境、地应力场和油田开发方式等多种因素的影响,其中地质因素是导致套管损坏的内在因素,在塑性岩层发育段、断层破碎带等地质环境和地震、地壳变形等地质活动中易造成油水井的套管损坏。从构造应力场和非构造应力场两方面研究油水井套管损坏的动力学机制。断裂、地震和地表变形等地质活动造成区域构造应力场发生变化,沿这些活动带的套管受到的应力就会发生较大的变化, 严重影响了套管的抗挤毁强度。断层破碎带、泥岩吸水膨胀与蠕变、盐岩蠕变滑移以及油层出砂等局部地质环境的改变,打破了地下应力场的动态平衡,从而改变了油井周围的应力分布状态,产生局部应力集中导致套管损坏。分析油水井套管损坏的地质因素,揭示套管损坏的动力学机制,可达到保护油水井,预防和治理套管损坏的目的。关键词:套管损坏,地质环境、地应力、动力学机制 Integrated Study ofGeologic Factors Causing Casing Damage inOil—Wells andWater-Wells DAI Li(GeologicalEngineering) Directedby Professor XU Shou-yu Abstract Casing damage isalways disturbing factor thatseverely affectsnormal production in oilfield,The paper detects and partitions thetype ofcasing damage,and summarizes the distribution factors and dynamical mechanism ofcasing damage are the paper proffers thepertinency measllreaboutcasingdamage. Casing damage iseffected by geologic environment and terrestrial stress fieldand themode ofexploiture factorsarethe intrinsic one resulting often OC,CUl8 inthe geologic setting including flowing rockformationand crush zone and around thebeh ofgeolo西c movement such觞earthquake and deformation of earth mechanism ofcasingdamage isstudiedby tectonic stress and non- change ofareatectonic stress field causes the thecollapsingstrengthofcasing isreduced. The alternation of localgeologic setting such ascrush zone and thecreeping of saltrockand sandproduction inoilwellengenders thechange ofpore pressure thedistribution ofunderground stress fieldis influenced,which brings the stressfocus resulting easingdamage. The discussion about thegeologic factoranddynamical mechanism of casingdamage can defend casing andoilfield. Key words:Casing damage,Geologic environment,Ter