Paleopressure calculation method for tight reservoir based on thermal dynamics of fluid inclusion

A technology of fluid inclusions and thermodynamics, applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve problems such as error in simulation results, difficulty in obtaining accurate values, inconvenient evaluation of oil and gas development in tight reservoirs, etc., and achieve accuracy improvement , cost reduction effect

Inactive Publication Date: 2018-07-24
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

However, at present, the main parameters that limit the simulation accuracy are the inclusion composition and bubble filling degree, so it is difficult to obtain accurate values, so the simulation results have large errors
[0005] Judging from the existing methods, there is no method to calculate the ancient pressure of tight reservoirs by using the uniform temperature of fluid inclusions and the degree of bubble filling, which brings inconvenience to the evaluation of oil and gas development in tight reservoirs

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  • Paleopressure calculation method for tight reservoir based on thermal dynamics of fluid inclusion
  • Paleopressure calculation method for tight reservoir based on thermal dynamics of fluid inclusion
  • Paleopressure calculation method for tight reservoir based on thermal dynamics of fluid inclusion

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[0026] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] refer to figure 1 , a calculation method of paleopressure in tight reservoirs based on fluid inclusion thermodynamics, including the following steps:

[0028] Step 1. Measurement of the uniform temperature of fluid inclusions. The principle of measurement is: (1) In order to avoid the influence of non-uniform capture of inclusions on the test, select fluid inclusions with smaller individuals and relatively small bubble filling degree for testing; (2) ) to select the contemporaneous brine inclusions associated with hydrocarbon inclusions for determination; (3) to select fluid inclusions in minerals that can best reflect the diagenetic environment.

[0029] The instrument used is a THMS600G automatic cooling and heating stage produced by Linkam Company in the United Kingdom, with a measurement error of ±0.1°C; the microscope is a Likon p...

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Abstract

The invention discloses a paleopressure calculation method for a tight reservoir based on the thermal dynamics of fluid inclusions. Based on the tight reservoir, the internal relationship between theuniform temperature of the fluid inclusions and the bubble filling degree of the tight reservoir is used fully, a calculation model based on the mole fraction and the bubble filling degree of oil inclusions in the tight reservoir is constructed, then the paleopressure of the tight reservoir is calculated, and a technical support for improving the geological evaluation of the tight reservoir is provided while improving the calculation precision of the paleopressure of the tight reservoir. The paleopressure calculation method for the tight reservoir based on the thermal dynamics of the fluid inclusions, for the first time in China, provides a method to calculate the paleopressure of the tight reservoir based on the uniform temperature and the bubble filling degree of the fluid inclusions, and a fluid inclusion method can be used effectively to improve the calculation precision of the paleopressure in the tight reservoir.

Description

technical field [0001] The invention belongs to the geological evaluation technology in the tight oil exploration and development technology, and in particular relates to a calculation method of the ancient pressure of the tight reservoir based on the thermodynamics of fluid inclusions. Background technique [0002] Tight oil reservoirs are considered to be non-economic or sub-economic reservoirs. During exploration, due to reasons such as untargeted formations or damage to reservoirs, sufficient attention has not been paid to oil and gas shows related to tight oil. Tight oil reservoirs generally have abnormal fluid pressure, and the abnormal pressure is always related to tight oil reservoir lithology, structural extrusion and organic-rich source rocks. The main mechanism for the formation of high-pressure tight oil reservoirs is the continuous generation of hydrocarbon oil and gas. When the amount of oil and gas accumulated is greater than the amount dissipated, the reservo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 斯尚华李军吴伟涛尚晓庆
Owner XI'AN PETROLEUM UNIVERSITY
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