Microbial multi-cycle huff and puff oil production method

A microbial and round technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of scrapping, poor steam injection effect, short production time, etc., and achieve simple construction technology, high oil production efficiency, low cost effect

Inactive Publication Date: 2011-05-25
PETROCHINA CO LTD
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Problems solved by technology

However, with the increase of steam injection rounds, the steam injection effect of oil wells is getting worse, and the production time of each cycle is getting shorter and shorter, and the corresponding cycle production is reduced, resulting in a significant increase in oil production costs, making many oil wells Approaching the limit of steam huff and puff mining
In addition, the adverse consequences of long-term steam huff and puff are: the formation is severely damaged, and the downhole string is seriously damaged or even scrapped.

Method used

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  • Microbial multi-cycle huff and puff oil production method
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  • Microbial multi-cycle huff and puff oil production method

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0027] like figure 1 As shown, the microbial multi-round huff and puff oil recovery method in this embodiment includes: strain screening, domestication, cultivation and production steps, selecting a mixed strain LJ comprising Ochrobactrum sp. and Rhodococcus ruber, The mixed strains LJ were separated, and the colony and cell morphology of Paleobacterium pallidum and Rhodococcus rubrum in the mixed strains were obtained, and each strain was identified as a genus, and the strains were respectively placed on the LB plate Dilution coating S101; the step of determining th...

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Abstract

The invention discloses a microbial multi-cycle huff and puff oil production method. The method comprises the following steps that: strains are screened, acclimated, cultivated and produced; determined process of injection parameters which comprise strain liquid injection rate, nutrient solution injection rate, shortest well shutdown time t and multi-cycle huff and puff interval parameters; and an oil-well microbial community is tracked and monitored. In the method, the tracking and the monitoring are performed by molecular biology; a field process is improved by combining the actual production condition and a monitoring result; and the method has the advantages of simple construction process, low cost and high oil production efficiency.

Description

technical field [0001] The present invention relates to oil recovery technology, in particular to steam huff and puff recovery technology for heavy oil wells, and more specifically to a microbial multi-round huff and puff recovery method. Background technique [0002] In the prior art, the heavy oil well production method usually adopts the steam huff and puff method, and the production time of each cycle is 3-6 months, and the cost per ton of oil is about 400 yuan. However, with the increase of steam injection rounds, the steam injection effect of oil wells is getting worse, and the production time of each cycle is getting shorter and shorter, and the corresponding cycle production is reduced, resulting in a significant increase in oil production costs, making many oil wells It is close to the limit of steam huff and puff mining. In addition, the adverse consequences of long-term steam huff and puff are: the formation is severely damaged, and the downhole string is severel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
Inventor 刘德铸刘利李牧张浩赵贲蒲均齐献宝刘宏伟杨红
Owner PETROCHINA CO LTD
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