⟪Two Wide and One High⟫ 3D Horizontal Well Real Time Steering Technology and Its Application in Engineering Field

The tight sandstone gas reservoir is thin, highly heterogeneous, and its spatial distribution is very complex. Its development is faced with the problems of low gas reservoir drilling rate and poor fracturing effect. In order to overcome the difficulties in the development of horizontal wells in tight gas reservoirs, the real-time steering technology of seismic geological integration horizontal wells based on 3D seismic data of "two wide and one high" is proposed in this paper. The pilot test of 12 horizontal wells has been completed using the proposed technology. The average horizontal section length is 1755 meters, the sandstone length is 1506 meters, the sandstone drilling rate is 85.7%, the effective reservoir length is 1290 meters, the effective reservoir drilling rate is 74.5%, the coincidence rate of seismic prediction is 91.7%, the success rate of one shot is 100%, and the structural prediction error is 0.45 parts per thousand. This technology can effectively improve the drilling rate and fracturing effect of horizontal wells in tight sandstone gas reservoirs, and has guiding significance for the development of horizontal wells in tight sandstone gas reservoirs.