Method for exploiting heavy oil reservoir by terrestrial heat

A heavy oil reservoir and geothermal technology, which is applied in the fields of fluid extraction, geothermal power generation, earthwork drilling, etc., to achieve the effects of low mining cost, cost reduction, and energy saving

Active Publication Date: 2020-09-01
CHINA PETROLEUM & CHEM CORP +1
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In addition, at present, medium and low-temperature geothermal resources (below 150°C) are directly used for heati

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  • Method for exploiting heavy oil reservoir by terrestrial heat

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[0031] The present invention will be further described below in conjunction with accompanying drawing. In the present invention, the same unit symbol represents the same unit, wherein t / d represents ton / day, m is the length unit meter, and ℃ is the temperature unit degree Celsius,

[0032] The present invention proposes a method for exploiting heavy oil reservoirs utilizing geothermal energy, comprising the following steps:

[0033] Step 1. According to the geological conditions of the region where the target oil reservoir is located, determine whether there is a geothermal layer with available geothermal resources in the upper or lower part of the target oil layer. Preferably, the temperature of the geothermal layer should be above 150°C.

[0034] Step 2. After discovering the available geothermal resources, deploy at least two injection wells and at least one production well in the target reservoir location area. The injection wells are used for injection of injection fluid....

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Abstract

The invention discloses a method for exploiting a heavy oil reservoir by terrestrial heat. The method comprises following steps: step 1, whether a geothermal layer with available geothermal resourcesat the upper part or the lower part of a target oil layer exists or not is judged according to geological conditions of an area where a target oil reservoir is located; step 2, after the available geothermal resources are discovered, at least two injection wells and at least one production well are deployed in the location area of the target oil reservoir, and the injection wells are applied to injection of injection fluid; and step 3, the injection fluid is heated by the geothermal resources of the geothermal layer, the heated injection fluid replaces crude oil in the heavy oil reservoir, andtherefore, exploiting of the heavy oil reservoir is realized. According to the method, by means of the geothermal resources of the geothermal layer, continuous and stable heat energy supply is guaranteed, cost of a thermal recovery process of heavy oil is reduced, and recovery ratio of the heavy oil reservoir is greatly increased.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method for utilizing geothermal energy to exploit heavy oil reservoirs. Background technique [0002] Heavy oil is a kind of petroleum resource. Its physical properties are very special, mainly showing that it is very viscous and has poor fluidity. According to domestic general industry standards, crude oil with a viscosity greater than 50mPa·s under oil layer conditions or greater than 100mPa·s under ground conditions after degassing is defined as heavy oil. According to the statistics of oil and gas resources published globally, heavy oil reserves account for 70% of global oil reserves, but how to develop heavy oil reservoirs economically and effectively is still a world-class problem. structure has a major impact. [0003] Although the geological conditions and crude oil properties of heavy oil resources in the world are complex and diverse, except for heavy...

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Application Information

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IPC IPC(8): E21B43/24E21B43/16E21B43/34
CPCE21B43/24E21B43/164E21B43/34Y02E10/10
Inventor 杨森孙建芳秦学杰
Owner CHINA PETROLEUM & CHEM CORP
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