Technical Study on Acidification and Augmentation in High Pressure under Injection Well in Chang 8 Reservoir of Jiyuan Oilfield
Abstract: Due to poor reservoir physical property, serious scaling, blockage of pore throat, pollution occurring in reservoir reconstruction at the early stage, under injection was induced in Chang 8 Reservoir of Jiyuan Oilfield. A retarding acid DSP-106 system for block removal and deep penetration in water injection wells was researched, the corrosion ability of the system could reach the corrosion ability for fluorine boric acid and hydrogen fluoride acid, by which the core permeability was effectively improved without core damage and rock cuttings fall off , the rock skeleton would not be destroyed. In April 2016, the technology of pressure reduction and augmentation is used in Well C2X, daily augmentation is 11 m3, water injection pressure reduction is 2.9 MPa, the apparent water absorption index increases by 3.17 times, the operation effect is obvious, and it can fully meet the requirements of allocation of water injection after acidification.
文章引用: 王伟华 , 帅 群 , 张文来 , 张红岗 , 李海燕 , 朱明昭 , 杨 欢 (2016) 姬塬油田长8层高压欠注井酸化增注技术研究。 石油天然气学报， 38， 86-92. doi: 10.12677/JOGT.2016.383029
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