重复酸压改造效果分析评价

Analysis and evaluation of acid re-fracturing treatment effect

刘长印

LIU Changyin

中国石化石油勘探开发研究院,北京　100083 中国石油大学,北京　102249

Sinopec Research Institute of Petroleum Exploration and Production, Beijing 100083, China China University of Petroleum, Beijing 102249, China

为了提高重复酸压改造工艺水平，改善重复酸压改造效果，通过对国内碳酸盐岩油藏历年重复酸压施工参数和效果进行分析，探索出了影响重复酸压效果的重要因素。提出了重复酸压的选井条件：一是井段不宜太长，应选择井筒周围有明显缝洞储集体的井；二是对第1次酸压后明显出水井重复酸压应慎重；三是对第1次已经明显沟通缝洞储集体，但试采证实供液能力不足的井，不宜采取重复酸压。该成果对碳酸盐岩油气藏重复酸压改造选井选段和施工具有指导意义。

To improve the process of acid re-fracturing treatment and its effect, the main factors influencing the acid re-fracturing effect are found out, based on analyzing the construction parameters and the effect of acid re-fracturing in the domestic carbonate reservoirs in the past years. Well selection requirements are proposed. Firstly, the interval should not be too long, and the wells with obvious fractures and cave reservoirs around the well bores are the best. Secondly, it should be cautious to put acid re-fracturing into practice in such wells that obviously produce water after the first time of acid fracturing. Thirdly, it is not suitable to put acid re-fracturing into practice in the wells with obvious connected fractures appeared in the first time of acid fracturing and cave reservoirs and poor fluid supply capacity proved by pilot production. The results obtained can be good reference to the well and interval selection and the construction of the carbonate reservoir acid re-fracturing. 