HY2-2气田储层损害因素研究

Influence Factors of Reservoir Damage for HY2-2 Gasfield

通过对储层粘土矿物、扫描电镜、敏感性评价和水锁等的测试与分析,开展了储层敏感性评价和水锁效应室内试验研究。研究表明,HY2-2气田储层低渗致密,成岩作用强,储层中可移动地层微粒数量小,其储层埋藏深,胶结致密,粘土矿物含量低且以高岭石为主;储层对流体速度、应力、矿化度和酸碱度变化不敏感,储层主要损害因素为水锁效应。

This paper analyzes the reservoir characters in HY2-2gas-field,then carrys out laboratory evaluation experiment of reservoir sensitivity and water lock effect by using core flow experiment device.The results show that the damage is mainly induced by the low permeability and tight formation,where diagenesis is strong and there is less moving micro-particles in the reservoir,and the reservoir with deeply buried,cementation density has a low content of clay minerals,most of which are kaolinite.The reservoir have no sensitivity to the changes of fluid velocity,stress,salinity and pH, and the mainly damage factor is the effect of water lock.