义104-1侧井砂砾岩储层大型压裂技术研究与应用

Study and application of massive hydraulic fracturing technique in Y104-1C well conglomerate formation

针对渤南地区砂砾岩油藏储层物性差、自然产能低、常规加砂压裂改造增产效果差及稳产周期短的现状,在义104-1侧井开展了大型压裂技术的研究与应用。根据储层地质特征及井况条件,在分析义104-1侧井压裂技术难点的基础上,分别从射孔井段参数优化、压裂规模优化、压裂液和压裂支撑剂优选与评价及配套技术措施等方面进行了研究。于2009年7月19日对义104-1侧井实施大型压裂,施工历时180min,累积泵入压裂液量为 1002.9m3,支撑剂量为 120m3,最大施工排量为7.2m3/min,压裂后30d的平均自喷产液量为45.2t/d,平均产油量为31.7t/d,增产效果显著。

Aiming at the fact that the southern areas of Bohai conglomerate reservoir natural capacity is low, without obvious interlayer, filter lost badly, and conventional hydraulic fracturing is low in production stimulation, this paper conducted the research and application of technology on Y104-1C well. According to the reservoir geological characteristics and well conditions, the paper studied the fracturing scale, the perforating section, and the optimization of fracturing material selection, as well as field application. We completed the fluid injection into well up to 1000 m with proppant of 120 m at pump displacement rate of 7. 2m/ min. After treatment, average fluid flowing production achieved 45. 2 t/d, average daily oil production at 31. 7 t, and the stimulation performance and the economic benefit are remarkable. This well fracturing technique, the successful application in the southern areas of Bohai conglomerate reservoir, is a significant breakthrough, and has provided valuable experience.