Method for correcting overburden pressure physical property of shale reservoir

A technology for shale reservoirs and reservoir physical properties, applied in special data processing applications, instruments, electrical digital data processing, etc. Increased costs, obvious differences in shale reservoirs and other issues, to achieve the effect of reducing research costs, reliably correcting results, and deepening understanding

CN105184034AActive Publication Date: 2015-12-23CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-12-23

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Abstract

The invention provides a method for correcting an overburden pressure physical property of a shale reservoir. The method belongs to the field of petroleum and natural gas exploration. The method is based on a reservoir rock core overburden pressure test. Through analyzing a relationship and a role between a physical property change after an overburden pressure is applied on the rock core and an overburden pressure change, a reservoir physical property overburden pressure correction model is established, namely a reservoir porosity overburden pressure correction model and a reservoir permeability overburden pressure correction moduel. The method comprises the following steps of (1) performing a rock core overburden pressure testing, and obtaining a testing result; (2) establishing a rock core physical property overburden pressure correction model, namely analyzing a change relationship between a rock core overburden pressure physical property and the overburden pressure according to the testing result of the step (1), and establishing a relationship model between the overburden pressure physical property and the overburden pressure in each rock core sample; and (3) establishing a reservoir physical property overburden pressure correction module, namely analyzing differences among the rock core physical property overburden pressure correction models which are established in the step (2), and analyzing a change rule between the difference and a routine physical property on the ground of the rock core.
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Description

technical field

[0001] The invention belongs to the field of petroleum and natural gas exploration, and in particular relates to a method for correcting the overburden physical properties of shale reservoirs, which is used for the exploration of shale reservoirs in petroleum geophysics. Background technique

[0002] Shale gas is an important part of the world's unconventional oil and gas resources. Shale gas resources are relatively abundant and the resource prospects are huge. North America is currently the only region in the world that has realized the commercial exploitation of shale gas. The shortage of oil and gas resources has prompted China to accelerate the development of shale gas. At present, the exploration and development of shale gas has become a hot spot in domestic oil and gas exploration. In the process of shale gas reservoir research, the core pores and permeability values ​​that directly reflect the physical properties of the reservoir are usually obtained ...

Examples

Embodiment Construction

[0066] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0067] The invention is based on the overburden pressure test of the reservoir rock core, analyzes the relationship and law between the physical property change of the rock core after overburden pressure and the overburden pressure change, and uses the law to establish an overburden pressure correction model.

[0068] Such as figure 1 Shown, the inventive method comprises the following steps:

[0069] (1) Carry out core overburden experiment

[0070] ① The distribution of conventional physical property values ​​(porosity, permeability) on the ground of all core test samples in the regional reservoir section is counted. A group of core samples whose physical property values ​​are relatively evenly distributed between the highest and lowest value intervals are selected to carry out overburden pressure experiments, and the experimental results under uniform incremental...