2 results about "Repeated fractures" patented technology

The present specification provides a method and device for determining an energy accumulation and repeated fracturing mode. The method comprises: performing different modes of energy accumulation and repeated fracturing on a sealed target core sample, the target core sample having initial fracture characteristic data; determining a fracture zone of the target core sample after the different modes of energy accumulation and repeated fracturing and extracting target fracture characteristic data of the fracture zone; determining comprehensive fracture characteristic data according to the initial fracture characteristic data and the target fracture characteristic data, the comprehensive fracture characteristic data being used to determine fracturing effects of the different modes of energy accumulation and repeated fracturing; comparing the comprehensive fracture characteristic data and selecting a target energy accumulation and repeated fracturing mode according to a comparison result. Based on the above method, an optimal energy accumulation and repeated fracturing mode can be selected, guidance can be provided for fracturing sites, and oil well productivity can be improved.

The invention belongs to the field of oil reservoir development, and particularly relates to a horizontal well pre-fracturing energy supplement refracturing physical simulation experiment device which comprises a mold, two first splinters are arranged in the mold, a second splinter is arranged in the mold, and the size of the first splinters is larger than that of the second splinter. The device further comprises a plurality of independent pipelines, one ends of the pipelines are embedded into the cracks of the first split piece and the second split piece respectively, the other ends of the pipelines extend out of the mold and are connected with a power source, the concentration of fluid flowing through the second split piece is higher than that of fluid flowing through the first split piece, and valves and first monitoring units are arranged on the pipelines. The first monitoring unit is arranged along the length direction of the pipeline, the second monitoring unit is arranged along the length direction of the pipeline in the mold, cement is poured into the mold to form a simulation block, and a driving source is arranged outside the simulation block. And more experimental bases are provided for refracturing scheme design of oil fields and scientific research institutions.