Multi-period fracture quantitative prediction method based on fault activity

A prediction method and active technology, applied in the field of oil and gas field exploration and development, mineral evaluation and prediction, can solve problems such as difficult to find mathematical relationships, and achieve the effect of strong operability, high practical value, and low prediction cost

Inactive Publication Date: 2017-02-22
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

The development of cracks often conforms to the similarity in the statistical sense, and it is difficult to find a quantitative mathematical relation...

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  • Multi-period fracture quantitative prediction method based on fault activity
  • Multi-period fracture quantitative prediction method based on fault activity
  • Multi-period fracture quantitative prediction method based on fault activity

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specific Embodiment approach

[0046] Such as image 3 Taking the Tongcheng fault zone in the Jinhu sag shown as an example, the development law of multi-stage fractures in this area is quantitatively predicted.

[0047] The first step is to use seismic interpretation related software to obtain the fault plane distribution map of the work area through careful seismic interpretation, and obtain the fault plane distribution and seismic profile of the Tongcheng fault zone (such as Figure 4 , Figure 5 shown).

[0048] Step 2 By calculating the paleo-drop of faults in different periods, use formula (1) to obtain the plane distribution map of fault activity in Tongcheng fault zone in different periods. The width of active faults on the plane represents the magnitude of fault activity ( Image 6 , Figure 7 shown).

[0049]Step 3 Dataify the active faults and fill them sequentially. By writing a program and moving the statistical unit, the dimension value D of the fault activity information in the statistica...

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Abstract

The invention relates to the field of oil and gas field exploration and development and mineral evaluation and prediction, and particularly relates to a multi-period fracture quantitative prediction method based on the fault activity. The paleo fall of the fault is solved based on seismic interpretation, different periods of fault activity plane models are established, and different periods of fracture density development models are established by calculating the fault activity information dimension; and a fracture openness evaluation model is established through current ground stress analysis so as to predict different periods of current fracture development indexes. The method is low in prediction cost and high in operability so that labor and financial cost can be greatly reduced, and the prediction result has certain reference significance for multiple aspects including preferential selection of important areas of oil and gas and mineral exploration and performing of later fracturing stimulation measures.

Description

technical field [0001] The invention relates to the fields of oil and gas field exploration and development, and mineral evaluation and prediction, in particular to a multi-stage fracture quantitative prediction method based on fault activity. Background technique [0002] In the study of reservoir fractures, researchers have gradually realized that fractures in a certain area may have multiple stages, and how to quantitatively characterize multi-stage fractures is a major problem for researchers. The ever-changing multi-stage tectonic stress field acts on the heterogeneous tight sandstone, causing the development and superposition of multi-system fractures on a large scale. The characterization and prediction of fracture parameters under current burial conditions is a difficult point in multi-stage fracture prediction. The development of cracks often conforms to the similarity in the statistical sense, and it is difficult to find a quantitative mathematical relationship. I...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/306
Inventor 刘敬寿丁文龙杨海盟黄昌杰林长城
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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