Practice of High-Density 3D Seismic Exploration in Tight Oil Exploration in G Area of Central Sichuan

摘要

The Jurassic in the Sichuan-Kunchun Gulong gradual tectonic belt is widely distributed in the Sichuan Basin.There are oil layers in the range of up to 2000 m from the south to the north.With the progress of high-density 3D seismic technology in recent years,the high spatial sampling rate is characterized by high characteristics.Significant progress has been made in density seismic exploration technology.This paper introduces the first high-density 3D seismic test for the Jurassic tight oil exploration in the G area of the Sichuan Basin.The high-fidelity and high-precision high-resolution processing is used to improve the data quality.Through drilling,logging,oil testing and microseismic monitoring.The comprehensive research and application of the results,high-density data has obvious advantages in thin reservoir prediction and spatial description,reservoir internal feature characterization,fracture and fracture development zone characterization,and preliminary demonstration of high-density 3D seismic exploration technology in Sichuan Broad application prospects in the exploration of tight oils.