Comprehensive Characterization Integrating Static and Dynamic Data for Dynamic Fractures in Ultra-Low Permeability Reservoirs: A Case Study of the Chang 6 Reservoir of the Triassic Yanchang Formation in the Ordos Basin, China

The generation of dynamic fractures during the process water injection in ultra-low permeability reservoirs aggravates heterogeneity reservoir, resulting a rapid rise cut and directional flooding producers, which affects waterflood sweep efficiency recovery. A fracture, as geological feature reservoirs, has complex genetic mechanism is difficult to characterize. Taking Chang 6 reservoir Triassic Yanchang Formation Ordos Basin central China an example, this paper presents characterization method workflow fractures. On one hand, through analysis triaxial-compression rock-mechanic experiments mineral composition core, we evaluated rock brittleness order identify lithology that can easily generate new other beginning with ancient tectonic stress field combining fracture characteristics core outcrop, multi-fractal probabilistic neural network were applied natural quantitatively predict intensity Based on evaluation feature, was characterized by integrating bottom hole pressure, production response characteristics. “double-edged sword” waterflooding development reservoirs. premature activation could lead worse status. Nevertheless, rational control utilization play positive role improving oil Dynamic are great significance optimization adjustment well patterns for This provide reference similar