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Method for determining deployment position of steam injection well and method for converting oil reservoir from water drive into steam drive

A technology for steam injection wells and steam flooding, which is applied in wellbore/well components, earthwork drilling, measurement, etc., can solve problems such as poor economy of heavy oil reservoirs, and achieve the effect of improving utilization efficiency

Active Publication Date: 2021-04-27
PETROCHINA CO LTD
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Problems solved by technology

[0003] In order to overcome the poor economics of water flooding in heavy oil reservoirs, steam flooding is currently available as an alternative to water flooding after water flooding

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  • Method for determining deployment position of steam injection well and method for converting oil reservoir from water drive into steam drive
  • Method for determining deployment position of steam injection well and method for converting oil reservoir from water drive into steam drive
  • Method for determining deployment position of steam injection well and method for converting oil reservoir from water drive into steam drive

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[0049]The following detailed description will be further described below with reference to the accompanying drawings and examples. It will be appreciated that the specific embodiments described herein are only used to explain the relevant invention, and is not limited thereto. It will also be described in that, in order to facilitate the description, only portions associated with the relevant invention are shown in the drawings.

[0050]Combined with the description of the background, it is known that the reservoir developed by the water-driven drive, if the reservoir includes a large amount of heavy oil, it may be necessary to use vapor to exploit the heavy oil after the water drive. When the steam is mined, if the steam is directly entered into the water in the formation after injection into the formation, the large amount of heat is contained in the water in the water, resulting in an effective heating reservoir reduction. Therefore, in order to improve the steam thermal energy util...

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Abstract

The invention provides a method for determining the deployment position of a steam injection well and a method for converting an oil reservoir from water drive into steam drive. The method for determining the deployment position of the steam injection well comprises the following steps of determining a water channeling well in a well group and a water injection well located in the water channeling direction according to the injection-production dynamic response characteristics of the well group; determining the range of a water channeling channel and the water storage pore volume of the water channeling channel according to the liquid production characteristics of the water channeling well, the water absorption characteristics of the water injection well and the stratum characteristic data; and determining the deployment position of the steam injection well according to the range of the water channeling channel and the water storage pore volume of the water channeling channel. When the steam injection well selected by the method is used for developing the oil reservoir from water drive to steam drive, the steam drive exploitation of a heavy oil reservoir in the stratum is realized, meanwhile, the amount of steam heat absorbed by water stored in the water channeling channel can be reduced, and the utilization efficiency of steam heat energy is improved.

Description

Technical field[0001]This specification relates to the field of petroleum mining, and more particularly to a method of determining a deployment position of injection molding wells and a method of reservoir from a water driveway.Background technique[0002]In oil mining technology, water-driven mining is still a widely used secondary oil reservoir development, which is mainly used for dilute oil reservoirs developed by less than 150 MPa · S; and heavy oil reservoirs used in viscosity exceeding 150 MPa · S Mining, the economics of water-driven mining has declined significantly. Affected by factors such as non-homogeneity, rhythmic and oil-like viscosity differences, after the water-drive development, heavy oil in the reservoir is generally negative to the upper portion of the upper layer of the well section, and the upper portion of the layer.[0003]In order to overcome the problem of poor economics in the water-driven oil reservoirs, the solution of alternative water-driven drives avail...

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Application Information

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IPC IPC(8): E21B43/24E21B43/20E21B47/00E21B49/00
CPCE21B43/20E21B43/24E21B47/00E21B49/00
Inventor 吴迪楠韩煦韩月兰卫星徐丹丁靓靓孙念尚策杨冬霞秦艳玲冯玉蓝阔
Owner PETROCHINA CO LTD
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