Shale oil content determination method and system

A measurement method and technology of oil content, applied in the field of shale oil content measurement, can solve problems such as inability to accurately measure shale oil content, and achieve direct and accurate test methods with high resolution and direct and accurate test methods

Active Publication Date: 2015-09-09
PETROCHINA CO LTD
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Problems solved by technology

The method can accurately, quickly and easily determine the oil content of shale, and can overco

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  • Shale oil content determination method and system
  • Shale oil content determination method and system
  • Shale oil content determination method and system

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[0028] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention is described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.

[0029] The present invention will be described in detail below with a specific embodiment.

[0030] This embodiment provides a method for determining the oil content of shale, such as figure 1 As shown in the process flow, it includes the following steps:

[0031] Step A: The collected shale cores are fresh shale cores. Fresh shale cores refer to shale cores obtained by closed coring methods, or shale cores obtained by conventional coring methods that have been placed under closed conditions within half a year. Or within 2 weeks at room temperature, remove the edge part soaked by drilling fluid, and then drill samples in the middle of the core without hydrogen fluid or di...

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Abstract

The present invention provides a shale oil content determination method and system. The method includes the following steps: collecting a shale core, sampling in the central part for nuclear magnetic resonance (NMR) detection; crushing and quantitatively determining light hydrocarbon mass; after extraction of oil and water, detecting the water by the nuclear magnetic resonance (NMR); preparing crude oil according to the proportion of the light hydrocarbon and the oil, and establishing an external standard curve between crude oil volume and nuclear magnetic integral peak area; after drying and forming, detecting by the nuclear magnetic resonance (NMR), projecting the measured the peak area difference on to the external standard curve between the crude oil volume and the peak area to obtain the oil content of the shale core sample. The system includes sample preparation equipment, a nuclear magnetic resonance (NMR) tester, a crushing device, a gas chromatograph instrument, an oil and water extraction device, and a sample preparation device. According to the shale oil content determination method and system, the nuclear magnetic resonance (NMR) tester, the crushing device, the oil and water extraction device and other equipment and instruments which are not commonly used in the field are used, the oil content of the shale core can be analyzed, and the shale oil content determination method and system has the characteristics of being rapid, accurate, simple, low in cost, and the like.

Description

technical field [0001] The invention relates to the testing field of petroleum exploration, in particular to a method and system for measuring oil content of shale. Background technique [0002] In recent years, shale oil has become a hot spot in exploration and a difficulty in research in the field of unconventional oil and gas at home and abroad. Especially the oil content of the economic index. Traditional reservoir research mainly determines oil content based on porosity and oil saturation. In the field of geochemistry, pyrolysis data S1, chloroform bitumen A, Soxhlet extraction method or Retort volatilization method are used to determine oil content. Undoubtedly, for low-porosity and low-permeability shale, it is very difficult to determine shale porosity and oil saturation, and no unified method and standard have been established yet. Similarly, commonly used methods such as pyrolysis data S1 and chloroform bitumen A in the field of geochemistry also have the loss of...

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Application Information

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IPC IPC(8): G01N24/08
CPCY02A90/30
Inventor 邹才能崔景伟朱如凯吴松涛
Owner PETROCHINA CO LTD
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