This paper discusses the long 6 extend oilfield injection wells because the transfer group and the leading edge of microseismic monitoring of water. Yanchang Oil Field Oil Production Plant 4237 Zichang water injection wells set the direction of NEE to the front edge by the impact of in situ stress field in the direction of the strong. That injector network layout should also refer to the in-situ stress field direction and the original crack direction.