Multi-period fracture quantitative prediction method based on fault activity

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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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 relationship. It is difficult to simulate the development law of multi-stage cracks in the experimental conditions, so the experimental results are often one-sided.

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