方法针对河南油田稠油油城回来水率低、提高排液量难度大等问题，选择有代表性的小层，开展了高温高压条件下的储层敏感性室内试验研究。目的保护油气层，充分发挥其潜力。结果提出了注蒸汽吞吐各生产环节中相应的油层保护措施，改善了稠油注蒸汽的吞吐效果。结论通过对80取口井32块样品的速敏性、水敏性、碱敏性以及正反向流动试验，取得了对储层粘土敏感性的定量认识。认为注入、采出液强度应限制在速敏极限值以下；周期采油过程中，高温期排液量不宜过大，中低温期配合降粘助排措施，适时强化排液；严格标定入井液的pH值，禁止不合格的化学剂溶液入井，避免碱敏作用对储层的伤害。 Methods Aiming at the problems such as low return water rate of heavy oil oily city in Henan Oilfield and difficulty in increasing drainage volume, a representative small layer was chosen to conduct laboratory tests on reservoir sensitivity under high temperature and high pressure. The purpose of protecting the reservoir is to maximize its potential. Results The corresponding reservoir protection measures in each step of production of steam injection were put forward, which improved the throughput effect of heavy oil steam injection. Conclusions The sensitivities of reservoir clay were quantitatively obtained by testing the fastness, water sensitivity, alkali sensitivity and forward and reverse flow of 32 samples taken from 80 wells. It is considered that the injection strength should be limited to less than the speed-sensitive limit value. During the period of oil recovery, the amount of liquid discharged during the high-temperature period should not be too large. During the low-temperature period, pH, prohibit unqualified chemical solution into the well, to avoid alkali damage to the reservoir effect.