Evaluation method of recovery factor

An evaluation method and recovery factor technology, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of inaccurate evaluation of crude oil recovery rate, etc., and achieve accurate and accurate recovery rate Effect

Active Publication Date: 2019-04-09
PETROCHINA CO LTD
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Problems solved by technology

[0005] The purpose of this application is to provide an evaluation method of oil recovery to solve the problem that the crude oil recovery cannot be accurately evaluated in the prior art

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Embodiment Construction

[0020] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0021] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0022] As introduced in the background technology, the methods in the prior art cannot accurately evaluate the o...

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Abstract

The invention provides an evaluation method for the recovery ratio. The evaluation method comprises the steps that S1, the parameters of fire flood are obtained and contain the air utilization rate Eta<air>; and S2, the recovery ratio ER of crude oil is calculated through the parameters. According to the evaluation method, when the recovery ratio function is calculated, the influence of the parameters of the prior art on the recovery ratio is considered, and the influence of the air utilization rate on the recovery ratio is also considered. Compared with the prior art, the recovery ratio calculated and obtained through the evaluation method is more accurate, and thus the recovery ratio of the crude oil can be evaluated more precisely through the recovery ratio.

Description

technical field [0001] This application relates to the field of petroleum, and in particular, relates to an evaluation method of recovery factor. Background technique [0002] Fire flooding oil recovery technology is to inject air into the oil layer, ignite the oil layer, use 10% to 15% of the heavy components in the crude oil as fuel to burn on the spot, continuously burn to generate heat, and drive the crude oil out of the oil layer. Compared with the thermal recovery method of steam injection, oil recovery by fire flooding has many advantages such as wide application range, high oil displacement efficiency, low cost, energy saving and carbon emission reduction. [0003] The oil recovery mechanism of fire flooding is different from that of water flooding and steam injection, and the calculation method of recovery degree is also different. Some scholars have made different calculations and elaborations on the recovery index of the burned area. Zhang Yi, Xie Zhiqin and oth...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E21B43/243E21B47/00
Inventor王如燕潘竟军陈龙刁长军宋晓梁建军陈莉娟蔡罡计玲李家燕余杰坎尼扎提
OwnerPETROCHINA CO LTD