海拉尔油田储层保护技术研究

Technology Research on Reservoir Protection in Hailaer Oilfield

随着大庆长垣内部高渗油田的开发,综合含水逐年上升,稳产的难度增大,加快外围海拉尔低渗透低产油田的开发,对大庆油田的产量接替和稳产都有着至关重要的作用。而海塔盆地地质条件复杂,储层保护的难度大,严重制约了勘探开发进程。为了适应海拉尔油田勘探的快节奏,针对海塔探区的地质特点,开展了海拉尔油田储层损害机理、保护储层钻井液体系等方面的研究,并优选了有效防止水敏损害和防止水锁损害的处理剂,优化后的钻井液体系现场应用效果良好。

In recent years, with the exploitation of high permeation oilfield in Daqing placanticline, the general water percentage is rising year by year, meanwhile, it is more difficult to guarantee stable yields than before. Therefore, it plays a vital role for output succeeding and maintaining to speed up the exploitation of low productive oilfield with low permeality in the external Hailaer Basin. However, due to the complicate geological conditions, it increases the difficulty of reservoir protection, and also seriously hampers the process of exploration and development. In order to meet the fast-paced exploration of Hailaer oilfield, according to the geology characteristics of Haita exploratory area, damage mechanism and drilling fluid protection system of reservoir have been made studied. Furthermore, the treating chemical have been optimized for preventing water sensitive damage and water block damage. The optimized drilling fluid is with good application in the field.