Well point fracture porosity prediction method based on dispersion characteristics of logging information

A technology of well logging data and fractures and pores, applied in the field of exploration geophysics, can solve the problems of difficult acquisition of 3D seismic, seldom calculating fractures, expensive acquisition costs, etc.
CN110333549AInactive Publication Date: 2019-10-15CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2019-10-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a well point fracture porosity prediction method based on dispersion characteristics of logging information. The well point fracture porosity prediction method based on the dispersion characteristics of the logging information comprises the following steps: Step 1, carrying out reservoir rock microscopic pore structure system division; Step 2, calculating the rock physical modulus of a dispersion medium model; Step 3, calculating the compressional wave velocity and the shear wave velocity of a rock physical model with multi-pore distribution; Step 4, carrying out matching inversion on the compressional wave velocity and the shear wave velocity of logging and the velocities of the theoretical model; and Step 5, when a matching objective function F(alpha<n>) is smallerthan delta Vp, outputting the attributes of reservoir fracture pores at a current point. The well point fracture porosity prediction method based on the dispersion characteristics of the logging information has the advantages that the logging information is utilized for fracture porosity prediction, so that the fracture development situation of a single well can be effectively predicted, and an effective basis can be provided for fracturing evaluation.
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Description

technical field

[0001] The invention relates to the field of exploration geophysics, in particular to a method for predicting the porosity of well point fractures based on the dispersion characteristics of well logging data. Background technique

[0002] For oil and gas exploration and development, fractures are a very important feature of reservoirs. If the fractures in the oil and gas reservoir are well developed, it means that the reservoir has higher commercial value. On the contrary, if fractures are not developed, even if the formation contains oil and gas, considering a series of factors of industrial development costs, it may not even be considered as oil and gas reservoirs. In addition, the relevant physical characteristics of the fracture are also critical. Generally speaking, the larger the fracture size, the larger the fracture opening and closing degree, the larger the fracture space, and the higher the fracture density, it means that the reservoir has better ...

Claims

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