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
CN108316918AInactive Publication Date: 2018-07-24XI'AN PETROLEUM UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XI'AN PETROLEUM UNIVERSITY
Publication Date
2018-07-24
Estimated Expiration
Not applicable Β· inactive patent

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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.
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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...

Claims

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