Method and device for acquiring seismic porosity of complex carbonate reservoir

Abstract

The invention provides a complex carbonate stratum earthquake porosity obtaining method and apparatus, and belongs to the field of petroleum exploration. According to the method provided by the invention, the earthquake porosity of a target region is calculated through firstly obtaining a target earthquake consolidation coefficient, target earthquake critical porosity, an earthquake full fluid rock density and a rock matrix shear modulus, a critical porosity phenomenon is taken into consideration, at the same time, the influence exerted by an aperture structure on a seismic wave speed is also considered, as a result, physical significance in solving the porosity is clear, the method is well applied to a carbonate stratum with a complex aperture structure, and compared to other earthquake porosity prediction methods, the method accords with actual geological conditions better. Actual liquid production capacity obtained through drilling exploitation is utilized for calibration, and it can be visually seen that an earthquake porosity result calculated by use of the method can quite accurately reflect the size of the reservoir space of the carbonate stratum.

Description

technical field [0001] The invention relates to the field of petroleum exploration, in particular to a method and device for acquiring seismic porosity of complex carbonate reservoirs. Background technique [0002] With the development of industrial technology, people's demand for energy is increasing. Common energy sources include electric energy, wind energy, and fossil energy. In daily life, such as petroleum used in automobiles, is fossil energy. The sources of different types of energy are different. For example, electric energy is usually obtained by converting other forms of energy, such as wind power and hydropower, which convert kinetic energy into electric energy. Different from electricity, fossil energy is transformed by animals and plants buried deep for a certain period of time, and needs to be obtained through exploration and excavation. [0003] With the development of fossil energy, more and more fossil energy is used in the current society. In order to s...

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Problems solved by technology

The above two methods have the advantages of simple calculation, convenience and practicality, and the application effect is ideal in areas with simple geological conditions and little lateral change, but it is difficult to apply to carbonate rock areas with complex pore structure and rapid lateral change

[0008] In summary, there are many methods for determining porosity in related technologies, but these methods are all based on different assumptions, and have their own limitations in practical applications, and the calculated results are not accurate. reflects the actual porosity of

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