Method for analyzing yields of cyclic gas injection wells of shale oil reservoir and application thereof

An analysis method and shale oil technology, applied in special data processing applications, earthwork drilling and production, wellbore/well components, etc., can solve the problem of ignoring CO2 diffusion, ignoring the capillary force effect of tight oil reservoirs, and even studying the oil displacement process. Few other problems to achieve the effect of improving development efficiency

Inactive Publication Date: 2018-08-28
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

Yu et al. (2014) discussed the influence of CO 2 important parameters of the huff and puff process, but they ignore the capillary force effect in tight reservoirs
Chen and Gu (2017) used sensitivity analysis to demonstrate the relationship between initial depletion production time, injection time, and pro

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  • Method for analyzing yields of cyclic gas injection wells of shale oil reservoir and application thereof
  • Method for analyzing yields of cyclic gas injection wells of shale oil reservoir and application thereof
  • Method for analyzing yields of cyclic gas injection wells of shale oil reservoir and application thereof

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[0055] The embodiments of the present invention will be described in detail below in conjunction with the embodiments and examples, but those skilled in the art will understand that the following embodiments and examples are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0056] In a first aspect, in at least one embodiment, a production analysis method of a shale oil reservoir circulating gas injection well is provided, which includes the following steps:

[0057] Establish a theoretical model of shale reservoir phase behavior; establish a reservoir model; obtain historical production data of the reservoir;

[0058] Combining shale reservoir phase state theory model and reservoir model, numerical simulatio...

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Abstract

The invention belongs to the technical field of simulation of shale oil reservoir development, and relates to method for analyzing yields of cyclic gas injection wells of shale oil reservoir and an application thereof. The method for analyzing yields of cyclic gas injection wells of shale oil reservoir comprises the following steps of: establishing a shale oil reservoir phase state theoretical model; establishing an oil reservoir model; obtaining production history data of an oil reservoir; combining the shale oil reservoir phase state theoretical model and the oil reservoir model to carry outsimulative calculation on influence factors of a well yield by utilizing a numerical simulation technology, wherein the influence factors comprise capillary force effect, molecular diffusion effect,cyclic period and the like; and respectively determining influences, on a recovery ratio, of each factor under different numerical values through comparing the simulative calculation result, and analyzing or evaluating an influence degree, on improving the well yield via cyclic gas injection, of each factor. According to the method, the problem that the reservoir oil displacement process of shaleoil reservoir cyclic gas injection and particularly cyclic CH4 injection is lack of systematic study in the prior art is relieved.

Description

technical field [0001] The invention belongs to the simulation technical field of shale oil reservoir development, in particular to a shale oil reservoir circulation gas injection oil well production analysis method and application thereof. Background technique [0002] With the increasingly prominent contradiction between the world's oil supply and demand, the gradual shortage of high-quality oil resources, the massive exploitation of conventional oil reservoirs, and the continuous development of oil and gas exploration and development, unconventional oil and gas resources have become important oil and gas resource replacement areas. For example, unconventional oil and gas resources such as shale oil, shale gas, tight gas, and coalbed methane have shown huge potential for exploration and development, and have gradually become the highlight of global oil and gas exploration and development. [0003] In recent years, due to the advancement of horizontal well drilling technolo...

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Application Information

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IPC IPC(8): G06F17/50E21B43/16
CPCE21B43/164E21B43/168G06F30/20
Inventor 张园李治平
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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