轮南潜山裂缝性油藏酸压工艺评价

Evaluation of acid-fracturing technology in fracture oil reservoir of Lunnan buried hill

李年银 赵立强 刘平礼 张倩

Li Nianyin Zhao Liqiang Liu Pingli Zhang Qian

西南石油大学石油工程学院, 四川 成都 610500

Petroleum Engineering College of Southwest Petroleum University, Chengdu 610500, China

酸压改造是轮南油田增储上产的主要技术手段。轮南潜山奥陶系储层埋藏深、地层温度高、孔隙裂缝发育等特征给酸压施工和酸压材料带来诸多困难。在分析了轮南潜山碳酸盐岩储层酸压改造技术难点的基础上, 对该油田所采用的深度酸压工艺、泵注程序、施工参数、排液方式等作了详尽讨论, 并提出了一些建设性的认识, 对类似的储层改造具有一定的指导作用。

Acid-fracturing is an important technique to stimulate in Lunnan oil field. The Ordovician carbonate reservoir of Lunnan buried hill is deeply buried underground. The reservoir temperature is high, and fractures develop. These reservoir characteristics bring difficulty to acid-fracturing treatment and material. This paper analyses these difficulties in acid-fracturing in carbonate reservoir of Lunnan buried hill. On the basis, the paper particularly analyzes types of deep acid fracturing technology, pump process, parameters during the job, types of drainage and so on. At last, the paper gives some suggestions. The paper can give the guidance for the stimulation of homologous reservoir.