摘要
玉门油田青西试采区白垩系下沟组油藏岩性特殊，属于陆源碎屑岩占３５．１５％、碳酸盐岩类占３３．８４％、粘土矿物占３１．０１％的特殊储层。储层低渗、低孔，天然裂缝发育，油层中部平均深度 ４２００ｍ，平均温度 １２０℃。针对这种特殊岩性储层，通过薄片鉴定、Ｘ衍射、环境扫描电镜等分析，结合酸蚀导流能力模拟试验，油藏数值模拟及优化设计等研究成果，建立了既不同于纯碳酸盐岩储层的深度酸压，又不同于砂岩储层酸化解堵的组合技术，即“降阻酸深度酸压＋多组分酸闭合酸化”的特殊增产技术方法，优选了适合储层改造的液体体系。通过柳１０２井的现场实践，取得了增产 １０２ｔ／ｄ、增产倍数达 １０倍的显著效果。
The lithology of Cretaceous Xiagou Formation reservoir in Qingxi long term production block of Yumen Oilfield is particular: terrigenous elastic rock takes 35. 16%, carbonate rock 33. 84% and clay mineral 31. 01 %. The permeability is low, porosity is low, and the natural fractures are developed. The average depth of the middle reservoir is 4200 m, the average temperature is 120℃. For the particular lithologic reservoir, through analysis of slice appraisal, X--diffraction, scanning electron microscope and so on, combining them with the research results like acid etching diversion capacity simulation test, reservoir numeric simulation and optimized design, this paper presents a particular stimulation process--deep acid fracturing with friction reducing acid plus closed acidizing with multi--component acid. This paper also presents the liquid sys- tern suitable for reservoir reforming. Field application of this process in well Liu102 shows that the stimulation effect is obvious: oil is increased by 102 t per day, and the multiple of incremental oil recovery is:10.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
1999年第5期62-67,共6页
Oil Drilling & Production Technology
关键词
储集层
岩性
白垩系
玉门油田
工艺
particular reservoir
clay mineral
elastic rock
carbonate rock
pattern
depth
acid fracturing
friction reducer
technique
research
