Method for heating oil shale reservoir

A technology for shale reservoirs and heating oil, which is used in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problems of high temperature and high pressure gas injection and circulation that are not elaborated in detail, and achieve resource saving and recovery efficiency. High, maneuverable effect

Inactive Publication Date: 2017-11-14
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] The methods described by the above-mentioned companies are still in the conceptual design or indoor research stage for oil shale in-situ mining technology, and have not elaborated on how to realize the injection and circulation of high-temperature and high-pressure gas

Method used

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] There is no record in the prior art on how to inject high-temperature and high-pressure gas into oil shale, and make the high-temperature and high-pressure gas returned to the ground continue to be recycled. Therefore, this application is aimed at this technical problem A method for heating oil shale reservoirs is presented. Next, the specific steps of the method will be described in detail.

[0025] The temperature range of the above-mentioned high-temperature and high-pressure gas is greater than or equal to 350 degrees and less than or equal to 500 degrees, and the range of the gas pressure of the high-temperature and high-pressure gas is greater than or equal to 2 MPa (megapascals) and less than or equal to 5 MPa (megapascals).

[0026] Such as figure 1 with figure 2 As shown, among them, figure 1 It is schematically shown that the method includes:

[0027]...

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Abstract

The invention relates to a method for heating an oil shale reservoir. The method comprises the following steps: respectively constructing a production well and a heating well in an oil shale area of a targeted reservoir; injecting a heating medium into a gas booster though gas-making equipment and pressing the heating medium; injecting the pressed heating medium into a medium heater to heat the heating medium to a preset temperature; injecting the heated heating medium into the oil shale area through the heating well to heat oil shale in the oil shale area; heating the oil shale through the heating medium to pyrolyze the oil shale to generate a pyrolysis product, making the pyrolysis product flow into the production well and mining out of ground; separating the pyrolysis product mined from the production well to produce hydrocarbon gas and the heating medium, wherein the hydrocarbon gas can heat the heating medium, and the heating medium can successively pass through the gas booster and the medium heater and can be injected into the production well to cycle and use again. According to the method of the invention, the method has advantages of high mining efficiency and large mining scale.

Description

technical field [0001] The invention relates to the technical field of in-situ mining of oil shale, in particular to a method for heating an oil shale reservoir. Background technique [0002] In-situ mining of oil shale refers to heating the oil shale reservoir at a high temperature, generally at a temperature of about 350-500°C, converting the solid kerogen in the oil shale into liquid hydrocarbons, and then recovering oil through traditional oil and gas drilling Process The process of extracting liquid hydrocarbons from the ground. With the increasing pressure of environmental protection, the in-situ mining of oil shale is an inevitable trend of large-scale commercial development of oil shale in the future. [0003] Oil shale in-situ mining technology can be divided into fluid heating, radiation heating and combustion heating according to heating methods. Among them, fluid heating technology has attracted wide attention due to its advantages of fast heating speed, short h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/241
CPCE21B43/241
Inventor 汪友平苏建政龙秋莲张汝生王益维孟祥龙高媛萍郭鹏
Owner CHINA PETROLEUM & CHEM CORP
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