Stress testing with the micro-hydraulic fracturing technique: Focus on fracture reopening

Pressure analysis during and after hydraulic fracturing is used extensively to obtain information on the in-situ state of stress and rock properties at great depth. In this paper, we analyse field data obtained with a wireline stress tool in low/very low permeability formations. In particular, we focus on the implications of carrying out several injection cycles in a stress test, with application on determining not only the minimum in-situ stress but other formation parameters too.