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Determination method of independent oil phase disappearance time and depth in cracking process of paleo-reservoir

A vanishing time, paleo-reservoir technology, applied in earth-moving drilling, wellbore/well components, etc., can solve the problem of not determining the vanishing time and depth of independent oil phases

Active Publication Date: 2018-06-01
PETROCHINA CO LTD
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Problems solved by technology

At present, there is no solution to determine the disappearance time and depth of independent oil phases in the cracking process of paleo-reservoirs under different geological conditions in the existing technology

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  • Determination method of independent oil phase disappearance time and depth in cracking process of paleo-reservoir
  • Determination method of independent oil phase disappearance time and depth in cracking process of paleo-reservoir
  • Determination method of independent oil phase disappearance time and depth in cracking process of paleo-reservoir

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0029] In order to determine the disappearance time and depth of independent oil phases in the cracking process of paleo-reservoirs under different geological conditions, and quantitatively restore the geological history process of thermal cracking and continuous evolution of paleo-reservoirs in the study area, the embodiment of the present invention provides a paleo-reservoir cracking Method for determining the disappearance time and depth of the independent oil phase in the process. figure 1 It is a schematic diagram of the method for determining the disappearance t...

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Abstract

The invention discloses a method for determining the disappearance time and depth of independent oil phases in the cracking process of ancient oil reservoirs, including: simulating the burial history and thermal evolution history of a single well in the research area, combining the hydrocarbon generation history of source rocks and the uniformity of reservoir inclusions Temperature, determine the time of crude oil filling, and determine the temperature experienced by the reservoir in different periods after crude oil filling; conduct gold tube pyrolysis heat simulation experiments on crude oil to generate total hydrocarbon gas yield data; generate crude oil according to the total hydrocarbon gas yield data Cracking kinetic parameters: According to the temperature experienced by the reservoir in different periods after crude oil filling and the kinetic parameters of crude oil cracking, the conversion rate of crude oil cracking into gas in different periods is generated; according to the conversion rate of crude oil cracking into gas in different periods, the ancient oil reservoir is determined The disappearance time and depth of the independent oil phase during the cracking process. The invention can quantitatively restore the thermal cracking process of ancient oil reservoirs in the research area, and has important theoretical and practical significance for predicting the lower limit of exploration depth of pure oil reservoirs in the research area and guiding oil and gas exploration in the research area.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas geological exploration, in particular to a method for determining the disappearance time and depth of independent oil phases in the cracking process of ancient oil reservoirs. Background technique [0002] Crude oil is thermally unstable, and cracking will occur under high temperature conditions to generate natural gas and bitumen. The marine carbonate rocks in China have the characteristics of old stratigraphic age, deep burial, and high degree of thermal evolution, which determine the hydrocarbon morphology of the marine carbonate rock formations in my country. Crude oil cracking gas reservoirs, such as Yingnan 2 in the Tarim Basin, and Puguang, Luojiazhai, Dukouhe, Anyue gas (field) reservoirs in the Sichuan Basin have been discovered one after another, showing bright exploration prospects. [0003] As the temperature increases, the paleo-reservoir cracks and gradually transi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 黄士鹏戴金星汪泽成方向徐安娜张春明
Owner PETROCHINA CO LTD
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