Application of trace substance tracer test method in low permeability reservoir-CQ oilfield

With increasing data availability and interpretation method development, the inter-well tracer test plays more and more important role in oilfield production and development. This paper introduces the trace substance tracer testing in CQ oilfield, and interprets the testing data by using the residence time distribution method. Through the testing results, the connection relationship between oil production and water injection wells, the preferential direction of water flooding, the speed of water line propulsion, the spread of injected water and the presence of high permeability bands between wells in the testing well group are clarified. Meanwhile, the heterogeneity of the reservoir between wells is more clearly understood, which provides a basis for the optimization of subsequent development plans. Through verification with production data, the testing results show that the application of trace substance tracer in the study area is effective, indicating that trace substance tracer can also be well applied in low permeability reservoirs.