Microseismic monitoring is extensively used to image hydraulic fracture growth in unconventional reservoirs, it has been applied to proof and optimize frac designs and field development plan. A case study in Mississippi formation shows fracture interactions between formations in vertical wells, 2 horizontal wells were planned and drilled based on the observation. Geometric and engineered completion designs had been tested in well 1H and 2H respectively. Microseismic results identified more reservoirs were fractured with complex fracture network from the engineered well; the geometric well shows more stage interaction and overlap, with more influence of natural fracture and fault. Further well production identified that the engineered well has better production than the geometric well.