缝内转向压裂工艺技术在姬塬油田老井改造中的应用及评价

Application and evaluation of steering fracturing technology in the reconstruction of old wells in Jiyuan oilfield

低渗透油田随着开发时间的延长,单井产量低、注采矛盾突出、储层重复压裂后,剩余油动用困难,通过缝内转向压裂技术的研究,进行了老井缝内暂堵压裂改造的现场试验,利用人工干预改变裂缝延伸方向,解决常规重复压裂无法有效动用人工裂缝侧向剩余油的技术难题。文章通过研究缝内转向压裂技术在长庆姬塬油田老井改造中的应用,评价其在低渗透油气田的适用性,为低渗透油田的持续稳产提供技术支撑。

With the extension of development time, the low-permeability oilfield has a low output per well, the contradiction between injection and production is prominent, and the residual oil is difficult to use after repeated fractures. Through the study of the internal steering fracturing technology, the temporary plugging in the old wellbore is carried out. The field test of fracturing transformation uses manual intervention to change the direction of crack extension, and solves the technical problem that conventional repeated fracturing cannot effectively use the lateral residual oil of artificial crack. This paper evaluates the applicability of the in-slot steering fracturing technology in the old well reconstruction of Changqing Jiyuan oilfield, and evaluates its applicability in low-permeability oil and gas fields, providing technical support for the sustained and stable production of low-permeability oilfields.