Well-to-seismic multistage constrained glutenite fan body sedimentary facies zone fine division method

Abstract

The invention provides a well-to-seismic multistage constrained glutenite sector sedimentary facies zone fine division method. The method comprises the following steps: counting lithological speeds and densities of glutenite sectors in different facies zones, establishing a forward modeling model, and carrying out seismic facies analysis on the glutenite sector forward modeling model; establishinga glutenite sector period sequence interface; determining seismic facies as a primary constraint condition; determining a logging sensitive curve as a secondary constraint condition; according to theglutenite body period sequence interface tracked in the step 1, establishing a glutenite body structure period sequence model; analyzing a variation function, and determining spatial structure parameters of variables; and outputting a simulation result, and performing plane attribute extraction along the glutenite body period sequence interface tracked in the step 1 to realize the well-to-seismicmultistage constraint phase zone division of sedimentary subfacies and sedimentary microfacies of the glutenite body. According to the well-to-seismic multistage constrained glutenite sector sedimentary facies zone fine division method, the numerical simulation is carried out under a geological model of fine period sequence division and structural period modeling, and the glutenite sedimentary body well-to-seismic numerical simulation sedimentary facies zone fine division is achieved.

Description

technical field [0001] The invention relates to the technical field of comprehensive interpretation research of seismic data and reservoir prediction, in particular to a method for finely dividing sandy conglomerate fan sedimentary facies belts constrained by multi-level well seismic. Background technique [0002] At present, there are many seismic facies identification and prediction and evaluation techniques for glutenite sedimentary geological bodies, and the main methods are mainly summarized into two types: one is the core observation method, and the sedimentary cycle is clarified through the actual core observation of multiple wells in the plane Sedimentary facies belts can be divided according to the core grain size, sorting and sedimentary structure of each sedimentary period; the other is the seismic attribute prediction method. Due to differences in amplitude attributes such as seismic transmission waveforms, seismic data are used to classify glutenite bodies of di...

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Problems solved by technology

In actual production, the core observation method is difficult to obtain more detailed core data in local areas; the seismic attribute prediction method is due to the difference in formation velocity of different sedimentary microfacies, the smaller the difference, the more difficult it is to finely divide and predict the sedimentary microfacies of glutenite bodies

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