Core water saturation measurement system

Abstract

The invention provides a rock core water saturation measurement system which comprises a shell, wherein an opening is formed in the shell, a detachable upper cover is covered on the opening, an upper reflecting plate and a lower reflecting plate positioned below the upper reflecting plate are arranged in the shell, and a vacuumizing joint capable of being connected with a vacuum pump is arranged on the shell; a rock core storage container is rotatably arranged inside the shell, a rock core inlet is formed in the upper end of the rock core storage container, the rock core storage container is positioned between the upper reflecting plate and the lower reflecting plate, a heating circular chamber is formed between the rock core storage container and the shell, the vacuumizing joint is communicated with the heating circular chamber, and the heating circular chamber is communicated with the inner cavity of the rock core storage container through the rock core inlet; a microwave generator is arranged in the shell and is provided with an energy output end which is positioned in the heating circular chamber; and an ion meter is arranged on the upper reflecting plate and can extend in the inner cavity of the rock core storage container through the rock core inlet. By utilizing the rock core water saturation measurement system, the diffusion of ions in rock core water can be quickened, the efficiency is high, and a rock core is heated more evenly, safely and reliably.

Description

technical field [0001] The invention relates to a rock core water saturation measurement system, in particular to a rock core water saturation measurement system in the technical field of oil and gas exploration and development. Background technique [0002] Core water saturation is an important basic data in the process of oil and gas exploration. Its determination is of great significance for deepening the understanding of formations. Especially in mud logging operations, it is necessary to measure the core water saturation as quickly and accurately as possible. It is of great significance to quickly understand the situation of oil and water in the formation. [0003] In the prior art, there is a method for analyzing the water saturation of rock core based on chloride ion detection technology: soak the rock core with deionized water, and measure the chloride ion concentration L in the leaching solution. 测 , volume of deionized water V 水 , the volume V of the core sample ...

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Problems solved by technology

[0004] However, the above measurement method only uses a sealed container to soak the core. When the core contains a certain amount of gas, the deionized water and the pore water in the core will be separated by the gas, making it difficult for the two to contact, and then the chlorine ions in the core pore water will need to be leached. a long time

In addition, if the amount of chloride ions contained in pore water is relatively small, the speed of its diffusion along the concentration gradient to deionized water will also be slowed down, and the time for deionized water and pore water to reach the equilibrium concentration of chloride ions will be correspondingly longer. The shorter the time, the greater the deviation of the measured chloride ion concentration

How to obtain the core porosity data is not explained in the above-mentioned prior art; and there are many methods for measuring porosity, including: using physical methods such as saturated kerosene, electrical measurement, CT scanning or nuclear magnetic resonance, etc., the porosity data obtained by the above methods The required steps, time and cost are quite different, and the correspondence between the obtained porosity data and the core is unknown, so the water saturation data of the core that is finally brought into the formula to calculate may be biased

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