Optimization of Multi-stage and Multi-cluster Fracturing Technology for Horizontal Wells in Jilantai Buried Hill

The Jilantai oil field is rich in reserves of metamorphic rock potential reservoirs, Some wells drilled in the early stages, recorded wells see better oil and gas display, but the oil test yield is low, so it needs fracturing to put into production. Conventional fracturing has a small range, low output and short stable production period. In order to improve the effect of reservoir reconstruction, multi-segment and multi-cluster fracturing technology for Jilantai metamorphic rock horizontal wells has been developed.. According to the well trajectory and logging interpretation results of well s1-1, we have formed a volume fracturing mode of "large-scale +large displacement + low sand ratio plug-in plus sand" by optimizing the staged cluster perforation scheme, fracture pattern scale and operation parameters, thus communicating more natural fractures and forming a complex fracture network system. The well is divided into 10 sections and 28 clusters of fracturing, after pressure of 49.2t daily oil, 31.49t of daily oil, the current production is stable, the effect of fracturing increase yield is remarkable.Through the successful application of multi-stage and multi-cluster fracturing technology in this well, a new technology of volume fracturing for metamorphic reservoir in Jilantai formed, which lays a foundation for the efficient development of this area.