测井资料在油层保护中的应用

油层损害的原因,主要是外来流体与地层流体不配伍或配伍性差而引起储层敏感性发作,导致固相颗粒堵塞岩石孔道以及使岩石性质和油层流体性质发生改变。而油层损害程度取决于油层岩石和流体特性以及钻井、完井、强化措施、采油生产方式等工序的设计和实施的合理性。在正常的地质条件下,油气藏储层的渗透率高和连通性也好,但地层受到损害后,如钻井泥浆侵入、射孔、长期注水的水质差等因素,致使地层的渗透率和连通性都受到影响。地层受到损害而影响油田开发是无疑的,因此,应用测井资料及早发现油层损害情况,对油田科学合理开发必定会有积极的作用。

The Application of Logging Data in Reservoir Protection

Reservoir damage is mainly caused by reservoir sensitivity due to incompatibility and poor compatibility between outside fluid and forma- tion fluid which result in solld particles slugging the pores d rocks and changes of rock properties and reservoir fluid properties.The dam- age degree of a reservoir depends on reservoir rocks and fluid property as well as the process design and executive rationality of drilling, completion, enhancement measures and petroleum production mode, etc. Under normal geological conditions, the reservoir permeability is high and connectivity is good. But they will be affected after the formation is damaged by the invasion of drilling mud, perforation, long-term water quality inferiority. There is no doubt that formation damage will influence oilfield development. So the application of log- ging data and early discovery of reservoir damage will produce active effect to rational exploitation of the oilfield.