Method and device for conducting reservoir prediction through correction acoustic well logging curves

Abstract

The invention provides a method and device for conducting reservoir prediction through correction acoustic well logging curves. The method comprises steps of collecting well bypass materials, acoustic well logging curves and original density curves; determining an object function in accordance with well bypass materials, acoustic well logging curves and original density curves; collecting original natural potential curves or original natural gamma curves; determining a new object function in accordance with original natural potential curves or original natural gamma curves, original longitudinal wave velocity curves, original density curves and well bypass materials; setting the annealing temperature; determining corrected acoustic well logging curves in accordance with the corrected object target; and conducting reservoir prediction in accordance with corrected acoustic well logging curves. By the aid of the simulated annealing algorithm, the correction is conducted through acoustic well logging curves, synthetic records which are matched with well bypass are obtained, the important basic data are provided for multiplicity reduction and inversion accuracy improvement of sequential model inversion, and the accuracy of the reservoir prediction is improved further.

Description

technical field [0001] The present invention relates to the technical field of geological exploration, in particular to the technology of reservoir prediction based on model inversion in the technical field of petroleum and natural gas geophysical exploration, specifically a method and equipment for correcting acoustic logging curves for reservoir prediction. Background technique [0002] In the process of oil and gas exploration, it is necessary to establish a reservoir model when integrating seismic data. Seismic inversion is the most important way to establish a reservoir model. It is mainly divided into two major categories: pre-stack seismic inversion and post-stack seismic inversion. kind. From the perspective of realization ideas of seismic inversion, it can be roughly divided into the following three categories: relative wave impedance inversion (Dow integral), recursive inversion and model-based inversion. Among them, model-based inversion is superior to the other ...

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Problems solved by technology

However, oil-based mud drilling is expensive, the number of wells is very small, and the regional empirical formula obtained is difficult to popularize

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