Oil shale in situ oil extraction method

An oil shale and in-situ technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of energy waste and low utilization rate of heating energy, so as to improve utilization efficiency, shorten heating time, The effect of improving recovery efficiency

Inactive Publication Date: 2017-01-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

In these methods, there is a common problem: after the oil shale is heated, a large amount of heat is dissipated from the top

Method used

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  • Oil shale in situ oil extraction method
  • Oil shale in situ oil extraction method

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Example Embodiment

[0018] The present invention will be further described below in conjunction with the drawings.

[0019] figure 1 It is a schematic diagram of the first embodiment of the method according to the present invention. Such as figure 1 As shown, the oil-bearing shale mining area 10 includes at least the following two stratigraphic structures: an oil shale roof 6 in the upper layer and an oil shale 7 in the lower layer. The oil shale roof 6 is a completely different stratum from the oil shale 7. It cannot produce oil and gas when heated, and has no exploitation value.

[0020] According to the method of the present invention, firstly, at least two wells are set up in the oil shale area (that is, the oil shale production area 10), such as figure 1 Auxiliary well 1 and production well 3 are shown. The auxiliary well 1 should extend to the bottom of the oil shale 7. The production well 3 should at least penetrate the oil shale roof 6 and reach the oil shale 7. The functions of the auxilia...

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Abstract

The invention relates to an oil shale in situ oil extraction method comprising the following steps: 1, drilling at least two wells in an oil shale zone, wherein one well is an auxiliary well, the other well is an extraction well, and the auxiliary well vertically penetrates the oil shale; 2, using the auxiliary well to crack the top and bottom of the oil shale, thus forming a horizontal crack zone on the top and bottom of the oil shale so as to cover the extraction well; 3, using the auxiliary well to heat the oil shale up to a pyrolysis temperature so as to generate oil gas, and using the extraction well to extract the oil gas. The oil shale in situ oil extraction method can heat up the oil shale with high efficiency, thus improving oil shale in situ oil extraction efficiency.

Description

technical field [0001] The invention relates to the field of petroleum engineering, in particular to a method for in-situ exploitation of oil or natural gas from oil shale. Background technique [0002] Oil shale is an unconventional oil and gas resource, which is considered as an important alternative energy source due to its huge reserves and rich organic matter content. [0003] Currently, in-situ oil recovery methods for oil shale mainly include combustion heating, fluid heating and microwave heating. In these methods, there is a common problem: after the oil shale is heated, a large amount of heat is dissipated from the top and bottom of the oil shale, resulting in a very low utilization rate of heating energy, resulting in a large waste of energy. Contents of the invention [0004] In view of the above problems, the present invention proposes an oil shale in-situ oil recovery method. According to the method of the invention, the oil shale can be heated efficiently,...

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Application Information

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IPC IPC(8): E21B43/241E21B43/26E21B43/30E21B43/16
Inventor 王益维苏建政龙秋莲孟祥龙汪友平高媛萍
Owner CHINA PETROLEUM & CHEM CORP
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