Well pattern optimization and application effect of highsteep fault block reservoir in Hailaer basin

The high-steep fault block reservoir in Hailaer basin is of big stratigraphic dip angle and needs fracturing operation.By mainly considering factors such as gravity,artificial fracture and etc.,the reasonable well pattern and water injection manner have been optimized.The study results show that the larger fault block is suitable for square well pattern deployment and it can slow down the water channeling to a lower position due to the gravity and avoid early water breakthrough of oil producer due to artificial fracture failure.The flexible well pattern can be adopted near a narrow banded fault block and the faults.As for water injection manners,through the mechanism model and numerical simulation methods,the edge water injection manner can be determined in a small and narrow fault block,the combination of edge and point-like water injection manner can be adopted in larger fault blocks.The application effect results indicate the adopted well pattern modes and water injection manners are reasonable.