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Production method and device for heavy oil reservoir

A technology for heavy oil reservoirs and production methods, which is applied in the fields of production fluids, vibration generating devices, earthwork drilling, etc. The effect of improving thermal efficiency and oil-steam ratio and enhancing oil recovery

Active Publication Date: 2019-09-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] From the above, it can be seen that the production efficiency and recovery factor of the existing heavy oil reservoirs are low.

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  • Production method and device for heavy oil reservoir
  • Production method and device for heavy oil reservoir

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and 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.

[0018] The inventor found that: in order to improve the thermal efficiency of the steam injection process, foreign countries began to study the application of ultrasonic waves to the process of increasing production in oil fields in the mid-to-late 1960s, but its application was limited to reducing the viscosity of wellbore crude oil, removing plugging in formations near the wellbore, preventing wellbore Waxing, wellbore descaling and other measures to improve the wellbore and the formation near the wellbore. However, ultrasound has not been used as a reservoir development technology in the res...

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Abstract

The invention discloses an exploitation method and device for a heavy oil reservoir. The exploitation method includes: staring an ultrasonic generator, and using ultrasonic waves generated by the ultrasonic generator to process a target stratum of a heavy oil reservoir to be exploited; arranging the ultrasonic generator in an ultrasonic operation well of the heavy oil reservoir to be exploited; injecting a preset flow of steam into the ultrasonic operation well, and heating the target stratum of the heavy oil reservoir to be exploited; and closing the ultrasonic operation well till the injected steam is converted into water, opening the ultrasonic operation well, and exploiting the heavy oil reservoir to be exploited. The technical scheme can improve the use degree of the heavy oil reservoir, the utilization rate and the development efficiency of heat energy, and can improve the exploitation efficiency and the development effect of the heavy oil reservoir.

Description

technical field [0001] The invention relates to the technical field of oil reservoir exploitation, in particular to a method and device for exploiting heavy oil reservoirs. Background technique [0002] Heavy oil reservoirs refer to reservoirs with a degassed crude oil viscosity greater than 100mPa.s at the oil layer temperature. At present, thermal recovery technology is widely used in the development of domestic heavy oil fields. Oil recovery methods include: steam-assisted gravity drainage, steam huff and puff, steam flooding and other technologies. [0003] As the main development technology of heavy oil fields in China, steam stimulation technology has been applied for more than 30 years. As of 2014, the production reserves of steam huffing and puffing were 810 million tons, and the annual oil production was 7.234 million tons, accounting for 66.8% of the annual production of heavy oil. Steam stimulation is an operation mode mainly developed by natural energy, and it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/24E21B28/00
Inventor 郭二鹏蒋有伟高永荣王红庄
Owner PETROCHINA CO LTD