Small layer pressure test analysis method

Abstract

The invention aims to provide a method for measuring data of formation pressure change in a perforation process by a measurement instrument and then performing a small layer pressure test with a data processing method. The invention is realized by the following technical scheme: the small layer pressure test analysis method comprises the steps of setting a sampling rate of the measurement instrument, fixing the measurement instrument and a perforation gun, and enabling the measurement instrument to enter a well together with the perforation gun; testing pressure values and temperatures of different small layers in a shaft during each stage by the measurement instrument, obtaining position data of a sampled pressure value while sampling the pressure value and the temperature each time, and uploading the data to a ground device in real time or after storage; and extracting the data of the ground sampling device to a computer and establishing an analysis evaluation chart by utilizing pressure playback software set in the computer to obtain an evaluation result.

Description

technical field [0001] The invention relates to a small layer pressure test technology, in particular to a small layer pressure test analysis method. Background technique [0002] The oil fields in our country mainly develop continental oil-generating geology. The characteristic is that there are many small layers and many thin layers. Due to the complex underground conditions, in some areas, the pressure of small layers with a depth difference of tens of meters or even a few meters will have obvious differences. The difference in the pressure of this small layer causes troubles in oil field development and reduces economic benefits. [0003] Analysis of its main reasons, mainly in the following two aspects. One is that two small layers are opened at the same time, and the layer with high pressure injects oil into the layer with low pressure. It is automatically carried out underground, and the ground personnel cannot find it, thinking that there is no oil underground. Or...

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Problems solved by technology

Or there should be a relatively high yield to a very low yield, resulting in a wrong understanding of subsurface fluids

The second is that the pressure difference between the two layers is not very large, but both are higher than the dynamic fluid surface pressure during oil pumping, and both can contribute positively in the initial stage of production, but the contribution is different, causing developers to misunderstand and affect the overall development Program decision

[0004] The existing formation testing technology in the oil field uses many instruments and equipment, takes a long time and complicated processes to test the formation pressure, because the service price is high and the cycle is long, it is suitable for important exploration wells

However, for general development wells, no

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