Chemical EOR project in Salym Petroleum Development (SPD) aims to increase oil recovery factor by applying a mixture of alkali, surfactants and polymer (ASP). In West Salym field it is expected to gain increase in oil recovery of 10- 20%. A successful ASP pilot was conducted by Shell in 1989 in several wells of White Castle field, LA, where 38% of oil left after water-flood was recovered by ASP flooding. ASP method was first developed in early 80s in Shell, in Bellaire Research center, Houston, as a result of field testing of different chemical methods. Surfactant in the mixture reduces interfacial tension between oil and water, which leads to mobilization of resudual oil in porous medium of the rock. For efficient mobilization of oil the value of interfacial tension should be lowered down to extra-low values of 10-3 mN/m. Alkali is added in order to reduce adsorption of surfactant into the formation, which helps to bring down consumption of expensive surfactants. Polymer increases viscosity of the mixture, which helps to stabilize flow, improve sweep and displace viscous emulsion created in the formation.
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机译：Salym石油开发中的化学EOR项目（SPD）旨在通过施加碱，表面活性剂和聚合物（ASP）的混合物来增加吸油因子。在西部Salym领域，预计会增加储存量10-20％。 1989年，壳体在几个白色城堡田间，LA的几个井中进行了成功的asp飞行员，其中38％的油在洪水中恢复了水洪水。 ASP方法首先于80年代初开发，在休斯顿的Bellaire Research Center，由于不同化学方法的现场测试。混合物中的表面活性剂可降低油和水之间的界面张力，这导致岩石的多孔介质中的欺骗性油。为了有效动集油，界面张力值应降低到10-3mN / m的超低值。加入碱以减少表面活性剂的吸附，这有助于降低昂贵的表面活性剂的消耗。聚合物增加了混合物的粘度，这有助于稳定流动，改善在形成中产生的粘性乳液。
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