Prediction And Fracture Evaluation Of Igneous Reservoirs In Hongxing Area Of Eastern Sag Of Liaohe Oilfield

This paper mainly studies the igneous reservoirs in the Hongxing area of the eastern sag of Liaohe Oilfield.And geological characteristics of igneous rock and high-quality reservoirs in the middle and lower Shahejie Formation of Hongxing area are predicted from four aspects,including division of igneous rock's cycle and stage,prediction of spatial distribution of igneous lithofacies,prediction of fractures and prediction of igneous reservoirs.The main research content:1.Study on the geological characteristics of reservoirs in the Hongxing area: analysis of the geological tectonic background,stratigraphic development characteristics,and fine-layer calibration of the Hongxing area.The combination of well-seismic methods is used to divide the cycle of igneous rocks in the Shahejie Formation in this area.Igneous rocks in the Shahejie Formation are divided into two cycles and four to six stages.2.Fine characterization of igneous lithofacies in Shahejie Formation: identification of crater,study of volcanic eruption mechanism in Hongxing area,adoption of volcanic facies division theory based on “volcanic mechanism”,division of four igneous facies in the Hongxing area,and finally analyze the seismic attributes based on seismic data and the logging data,and finally drew the spatial distribution map of different stages of the igneous rocks in the Sha-3 member.3.Analyze the type of igneous rock reservoir in the Hongxing area.And the main reservoir in the area is determined as a fracture-type reservoir.Use curvature technology and seismic coherence attributes to predict the fractures of igneous rocks in the Sha-3.4.Use the advantaged reservoir inversion technique and fluid activity detection technology to predict the advantaged zone of the igneous rocks in the Sha-3 member.