Attenuation Material Composition for Seismic Simulation
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Solution Overview
Problem
Existing attenuation materials used in seismic physical modeling have a high quality factor Q value that is significantly different from the near-surface stratum, affecting the accuracy of seismic data and resolution in oil and gas exploration.
Innovation Solution
A composition of room temperature vulcanized silicone rubber, epoxy resin, and specific curing agents, including ethyl orthosilicate and dibutyltin oxide, is used to create an attenuation material with an approximately exponential relationship between Q value and velocity, mimicking the characteristics of near-surface strata, which is prepared through a heat treatment and mixing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing epoxy resin materials are used to prepare composite materials, then the material has a quality factor Q value within a range of 40-60, but this is significantly different from the quality factor Q value 15-40 of the near-surface stratum in practice
Solution Approach 1:
The patent combines room temperature vulcanized silicone rubber with epoxy resin to create a composite material that achieves a Q value of 15-40, matching near-surface stratum characteristics. The composite structure allows the silicone rubber component to reduce the overall Q value while maintaining structural integrity and simulation accuracy.
Solution Approach 2:
The patent modifies the material parameters by introducing room temperature vulcanized silicone rubber into the epoxy resin system, changing the Q value from 40-60 to 15-40. This parameter adjustment enables the material to accurately represent near-surface stratum attenuation characteristics in seismic simulations.
2Reliability
If the quality factor Q value of attenuation materials is reduced to match near-surface stratum, then the simulation accuracy is improved, but the material composition and preparation process become more complex
Solution Approach 1:
The patent uses a composite system of epoxy resin and room temperature vulcanized silicone rubber, where the silicone rubber acts as an additive to modify the Q value. This approach achieves the desired attenuation characteristics without requiring completely new material formulations, thus limiting the increase in complexity.
Solution Approach 2:
The patent introduces room temperature vulcanized silicone rubber as a specific component within the epoxy resin matrix to locally adjust the attenuation properties. This targeted addition allows precise control of Q value while keeping the overall material system relatively simple and manageable.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resulting attenuation material has longitudinal and transverse wave velocities, density, and quality factor Q values that closely match the actual stratum characteristics, enhancing the accuracy and precision of seismic physical simulations.
Implementation Method 1
subjecting a room temperature vulcanized silicone rubber to a first heat treatment
Implementation Method 2
the thiol group of the room temperature vulcanized silicone rubber may perform chemical reaction with the epoxy resin and gradually harden and shape up
Implementation Method 3
subjecting an epoxy resin to a second heat treatment
Implementation Method 4
subjecting to a second mixing with a second curing agent and the modified silicone rubber
Implementation Method 5
The absorption and attenuation effect of the stratum in regard to the seismic energy
Implementation Method 6
The resulting attenuation material has longitudinal and transverse wave velocities, density, and quality factor Q values that closely match the actual stratum characteristics
Data Source
AI summary
The attenuation material composition disclosed in the present disclosure comprises a room temperature vulcanized silicone rubber, an epoxy resin, a first curing agent and a second curing agent, wherein the first curing agent comprises ethyl orthosilicate and dibutyltin oxide; and the weight ratio of the room temperature vulcanized silicone rubber to the epoxy resin is (0.1-1):1.