RESEARCH ON ACID LEAKOFF REDUCTION BY INJECTING LARGE VOLUME OF SLICK WATER IN ACID FRACTURING OF NATURALLY FRACTURED OIL RESERVOIRS

被引:0
|
作者
Mou, Jianye [1 ]
Li, Chunyue [2 ]
Zhang, Shicheng [1 ]
Li, Dong [1 ]
机构
[1] China Univ Petr, 18 Fuxue Rd, Beijing 102249, Peoples R China
[2] SINOPEC Northwest Branch, 466 Changchun Rd South, Urumqi 830011, Peoples R China
来源
OXIDATION COMMUNICATIONS | 2016年 / 39卷 / 3A期
关键词
acid fracturing; natural fracture; leakoff; slick water; modelling; POROUS-MEDIA; TRANSPORT; FLUID; MODEL;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In acid fracturing of naturally fractured carbonate oil reservoirs in Tahe oilfield, the serious acid leakoff is the main factor that limits fracture propagation and live acid penetration distance. Reducing acid leakoff is the primary mean to increase live acid penetration distance. In this paper we did a research on an acid leakoff reduction technology by injecting large volume of slick water before acid injection in naturally fractured carbonate oil reservoirs. Firstly a new model was developed to simulate leakoff process of slick water plus acid in naturally fractured carbonates. Then based on the model extensive numerical study was conducted to investigate the leakoff behaviour of slick plus acid and the effect of slick water injection on acid leakoff. Next slick water volume and injection stage were optimised based on reservoir properties. Finally successful application cases of this technology to Tahe oilfield were provided. This research reveals the mechanism of acid leakoff reduction by injecting large volume of slick water and provides theoretical foundation for acid fracturing optimisation designs.
引用
收藏
页码:2566 / 2579
页数:14
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