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Supercritical steam injection well bore temperature field and pressure field distribution calculation method

A wellbore temperature and calculation method technology, which is applied in the direction of wellbore/well components, earthwork drilling and production, and production fluid, etc., can solve problems such as the large difference in steam and the calculation of wellbore temperature field and pressure field that cannot be supercritical

Active Publication Date: 2015-07-29
PETROCHINA CO LTD
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Problems solved by technology

[0004] At present, under the condition of supercritical steam injection, the thermodynamic properties of steam are very different from those of wet saturated steam. The original calculation model of steam injection parameters cannot correctly calculate the temperature field and pressure field of the wellbore under supercritical conditions.

Method used

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  • Supercritical steam injection well bore temperature field and pressure field distribution calculation method
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  • Supercritical steam injection well bore temperature field and pressure field distribution calculation method

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Embodiment Construction

[0094] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0095] Such as figure 1 As shown, the present invention provides a calculation method for the wellbore temperature field and pressure field distribution of a supercritical steam injection well, including:

[0096] Step 101 , acquiring related parameters of the wellbore and injection parameters of the wellhead.

[0097] Step 102, obtaining a preset node step size, and dividing the wellbore into multiple nodes starting from the wellhead.

[0098] Step 103, acc...

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Abstract

The invention provides a supercritical steam injection well bore temperature field and pressure field distribution calculation method and relates to the field of reservoir production. The method comprises obtaining well bore relevant parameters and well head injection parameters; obtaining preset node step length, and dividing the well bore into a plurality of nodes from the well head; calculating supercritical steam temperature and supercritical steam pressure of the lower ends of all nodes according to the well bore relevant parameters and the well head injection parameters with the well head serving as the initial calculation point successively; determining the well bore temperature field and pressure field distribution according to the supercritical steam temperature and the supercritical steam pressure of the lower ends of all nodes respectively. By the aid of the method, the well bore temperature field and pressure field of the supercritical steam injection well can be calculated.

Description

technical field [0001] The invention relates to the technical field of oil reservoir exploitation, in particular to a method for calculating the wellbore temperature field and pressure field distribution of a supercritical steam injection well. Background technique [0002] At present, with the in-depth development of oil and gas fields, the production of light and medium crude oil and shallow heavy oil blocks shows a downward trend year by year. Therefore, deep and ultra-deep heavy oil reservoirs will gradually become the main development reservoirs in the future, but due to their The burial depth exceeds 2000m, and the reservoir pressure is greater than 30MPa. The commonly used 21MPa subcritical pressure steam generator cannot exploit this kind of heavy oil. According to the steam injection parameters of heavy oil thermal recovery, the steam thermodynamic state of thermal recovery steam injection is mainly divided into saturated steam state (including steam injection of su...

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Application Information

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IPC IPC(8): E21B47/06E21B47/07E21B43/24
CPCE21B43/24G06F30/367
Inventor 张成博马振孙振宇曲绍刚刘锦于晓聪崔加利吕孝明姜佳悦李杰王文刚卢丽丝李辉唐丽刘佩衡哈长鸣康宸博
Owner PETROCHINA CO LTD
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