期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：186
期号：2
页码：012067
DOI：10.1088/1755-1315/186/2/012067
语种：English
出版社：IOP Publishing
摘要：M31 fault-block with reservoir permeability at around 9 md, belongs to low permeability reservoir with more strata and poor water absorption. Its daily water injection is 10 m3 per day and pressure is 30Mpa, and 10 m3 per day. Oil wells with low yield and low liquid badly need stratum energy. Aiming at this kind of low permeability sandstone reservoir, it researched piecewise hydrogen acid acidification technology to overcome the limitations of conventional mud acid acidification such as small effective radius and acidification sediment secondary pollution; also mutual influence between different layers was reduced. The implementation of the technology to M31-6 Wells got obvious effect of augmented injection, which has very important practical significance for the development of low permeability sandstone oil field and improves the ultimate recovery of oil field.
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