Inter-Well Communication and Prevention Measures in Qingcheng Shale Oil Horizontal Wells

In the development of unconventional reservoirs, well interference has been widely observed. This phenomenon refers to direct fracture communication between fracturing wells and adjacent fractured wells during hydraulic fracturing operations. The primary causes include mismatches between fracturing parameters and reservoir characteristics, such as excessive fracturing scale and undetected natural fractures. Through integrated geological-engineering studies in recent years, Qingcheng Shale Oil has reduced communication probability from 12% to 6%. This paper examines a typical well pad in Qingcheng Shale Oil, equipped with downhole microseismic monitoring, tracer production profile testing, and wellhead pressure monitoring technologies. Through comprehensive analysis of multiple fracture monitoring data, the main controlling factors affecting fracture communication are studied, the impact of fracture communication degree on production performance is revealed, and the feasibility of temporary plugging and staggered fracture placement for addressing fracture communication is clarified. The research results show that: ①The main controlling factors for inter-well communication are mismatches between fracturing parameters and reservoir characteristics, including excessive fracturing scale and undetected natural fractures; ②Minor fracture communication has no adverse effect on horizontal well production; ③Temporary plugging technology and staggered fracture placement can effectively mitigate fracture communication. These research findings provide guidance for optimizing fracturing designs and evaluating temporary plugging agent effectiveness in Ordos Basin shale oil development.