Prediction technology of facies controlled reservoirs based on seismic facies identification and its application:a case study of Weigang-Zhangdian area
With the deepening of exploration and development,the direction of exploration and development in Nanyang Sag has gradually shifted from the main area of Weigang and Zhangdian to the anticlinal wing,and the rolling exploration target has also changed from structural reservoir to complex lithology reservoir.Due to the complex structure of the Weigang-Zhangdian area and the low resolution of seismic data,reser-voir prediction has strong multiple solutions.Taking the second section of the Hetaoyuan Formation in the study area as an example,seismic facies identification and multi-attribute fusion analysis were carried out to improve the certainty of reservoir prediction.It was pointed out that underwater distributary channels are developed from north to south in the study area,which is a favorable facies zone for reservoir development.On this basis,the seismic resolution was improved through lithology inversion,and fine characterization of sand bodies with a thickness of less than 5 m was achieved,which provides a good technical support for the deepening of exploration and development of Weigang-Zhangdian area.
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