【摘要】 介绍了一种适合于低渗、特低渗储层的低损害完井液体系。该体系是由膨润土,混合金属氢氧化物、阳离子聚合物、非离子表面活性剂等组成的。对于低渗、特低渗储层渗透率恢复值可达到78％和85％。讨论了温度、压力、速度梯度对保护储效果的影响。更多还原

【Abstract】 The composition of a low damage drilling-in fluid for low permeability reservoir is presented. This system consists of bentonite, mixed metal hydroxide, cationic polymer and non-ionic surfactants etc. Permeability recovery reached 78% and 85% for low and very low permeability cores respectively. The influence of temperature, pressure and shear rate on formation damage are also discussed.更多还原