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Multi-scale fracture modeling method for fracture-cavity type carbonate rock oil reservoir

A carbonate rock reservoir and modeling method technology, which is applied in the fracture modeling field of fractured-cavity carbonate reservoirs, can solve problems such as complex fracture-cavity combination relationships, and achieve the effect of improving accuracy

Pending Publication Date: 2020-09-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a multi-scale fracture modeling method for fractured-vuggy carbonate reservoirs. Analyze the origin and scale of fractures in salt rock reservoirs, establish a multi-scale fracture distribution model, and solve the complex relationship between fractures and caves in fractured-vuggy carbonate reservoirs

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  • Multi-scale fracture modeling method for fracture-cavity type carbonate rock oil reservoir
  • Multi-scale fracture modeling method for fracture-cavity type carbonate rock oil reservoir
  • Multi-scale fracture modeling method for fracture-cavity type carbonate rock oil reservoir

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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0036] Such as figure 1 As shown, the multi-scale fracture modeling method of the fracture-cavity carbonate reservoir of the present invention comprises the following steps:

[0037] Step 1. According to the fracture scale, the fractures are divided into large-scale fractures, medium-scale fractures and small-scale fractures;

[0038] a. Distribution characteristics of large-scale fractures

[0039] Large-scale fractures refer to large-scale faults that can be clearly identified seismically and are mainly formed by regional stress. They can extend hundreds to thousands of ...

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Abstract

The invention provides a multi-scale fracture modeling method for a fracture-cavity type carbonate rock oil reservoir. The method comprises the following steps: firstly, identifying a scale accordingto cracks; dividing cracks into large-scale cracks, medium-scale cracks and small-scale cracks; secondly, aiming at a fracture-vug type carbonate rock fracture forming mechanism, subdividing small-scale cracks into fracture control cracks and karst cave control cracks; establishing a fracture model by adopting a deterministic modeling method according to characteristics of large-scale and medium-scale fractures, establishing a fracture model by adopting a random indication point method according to small-scale fractures, and finally forming a multi-scale fracture model through fusion, so thatthe fracture modeling precision of the fracture-cavity type oil reservoir is effectively improved, and the geological modeling method of the fracture-cavity type oil reservoir is perfected.

Description

technical field [0001] The invention relates to the field of oil and gas exploration and development, in particular to a fracture modeling of a fracture-cavity carbonate rock reservoir. Background technique [0002] Fracture-vuggy carbonate reservoirs are an important type of reservoirs in my country's petroleum basins. Reasonable and efficient development of such reservoirs is of great significance to the sustainable development of my country's petroleum industry and the security of energy strategies. The reservoir space of fractured-vuggy carbonate reservoirs is mainly composed of pores, fractures and vugs, with strong heterogeneity. The caves are the main reservoir space, and the fractures mainly connect the dissolved caves and dissolved vugs. Relevant experts and scholars have also done a lot of research on the problems encountered in geological modeling of fracture-vuggy carbonate rocks. Zhao Min, Kang Zhihong, etc. adopted the modeling method of seismic resampling con...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/05
CPCG06T17/05
Inventor 李红凯康志江吕心瑞魏荷花卜翠萍
Owner CHINA PETROLEUM & CHEM CORP
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