氧活化测试资料在海上中低渗油田的应用

Application of Oxygen Activation Test Data in Offshore Middle& Low-permeability Oilfields

由于海上K油田中低渗储层的渗透率不同,导致储层间物性差异大。注水井投注后,注入压力快速上升,吸水能力下降,使得注水量无法满足地质油藏的需求。根据地质油藏静态资料和油水井生产动态数据,选用氧活化测试手段,来确定各储层吸水能力及启动状况。利用测试资料成果,分别采取细分层系和提高注入压力两种方法,不仅注水井注水量增加,油井自然递减率随之减缓,还提高了低渗透储层的采出程度,从而有效改善了油田的开发效果。从现场注水井应用效果来看,在中低渗油田值得推广使用。

Due to the different permeability of the medium-low permeability reservoirs in the offshore K oilfield, the physical properties of the reservoirs vary greatly. After water injection betting, the injecting pressure has risen rapidly and the water absorption capacity has decreased, so that the water injection could not get the demand of geological reservoirs. According to the static analytic data of geological reservoirs and the production dynamic analytic data of producers and injectors, oxygen activation test methods were used to establish the water absorption capacity and threshold condition of each layer. By using the results of test data,two methods of zonal injecting and increasing injecting pressure have been adopted, not only the total injection volume of the injectors has been increased and the natural decline of the benefited producers has slowed down, but also producing degree of medium-low permeability reservoirs has been improved, and improve the oilfields development effect. From the application effect of on-site injectors, it is worthy of popularization in medium-low permeability oilfields.