微压裂测试作用:MINIFRAC or LEAKOFF TEST.
When we do a minifrac test in a vertical well, we are measuring the minimum in-situ stress, i.e., the fracture closure pressure.we obtain the minimum horizontal stress which is greater than the vertical stress.
Minifrac Tests are required to obtain fracture and reservoir parameters such as fracture leak-off rate, closure pressure/time, formation permeability, reservoir pore pressure, etc.. for fracture design and reservoir models, prior to any production.
MiniFrac Analysis or Mini-Frac Interpretation is a procedure to analyze or interpret the reservoir pressure responses after a short injection of fluid to fracture rock to obtain the above mentioned parameters.