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针对辽河油田曙一区油层的地质条件,对常用的钻井液处理剂进行了室内岩心渗透率损害实验和膨胀实验,优选出对岩心渗透率损害小的处理剂,配制了水溶性盐粒加重的钻井完井液,并进行了现场试验.室内试验结果表明.稀释剂对渗透率不同的各种岩心的损害较小.而降失水剂对其损害较大.三口井现场试验表明,使用水溶性盐粒加重的完井液,可消除固体颗粒对油层的堵塞,抑制粘土膨胀,减少对油层的损害。
Aiming at the geological conditions of the Shiyi oil reservoir in Liaohe Oilfield, indoor core permeability damage experiments and swelling experiments were conducted on the commonly used drilling fluid treatment agents. The treatment agent with less damage to the core permeability was selected, and the water soluble salts were added Drilling fluid and completion fluid.And the field test was carried out.The indoor test results show that the diluent has less damage to various cores with different permeability and the fluid loss agent is more damaging.The field tests in three wells show that the use of water-soluble Completion fluid with increased salinity can eliminate the clogging of oil layer by solid particles, inhibit the expansion of clay and reduce the damage to the oil layer.