Central permeation simulation core for laboratory experiments and preparation method thereof

Abstract

The invention discloses a central permeation simulation core for laboratory experiments and a preparation method thereof. The central permeation simulation core comprises the following components in parts by weight: 100 parts of quartz sand of 600-425 micrometers, 100-120 parts of quartz sand of 425-250 micrometers, 300-330 parts of quartz sand of 250-180 micrometers, 280-300 parts of quartz sand of 180-150 micrometers, 120-130 parts of quartz sand of 150-100 micrometers, 50-60 parts of quartz sand of 75-50 micrometers and 10-50 parts of a cementing agent. The preparation method of the central permeation simulation core comprises the following steps of: (1) mixing and uniformly stirring six types of constituted quartz sand with the cementing agent so as to form a core base material; (2) uniformly filling the core base material which is uniformly stirred into a core barrel for a plurality of times; (3) filling saturated and filtered injection water into the core barrel; and (4) testing the permeability of the prepared simulation core by adopting a water phase permeability test method. The core has the advantages of simple preparation method, strong operability and high reliability and repeatability. The core can be widely applied to the laboratory physical simulation experiments of the oil field geological and chemical fields.

Description

technical field [0001] The invention relates to experimental supplies and preparation methods in the fields of oilfield geology and chemistry, in particular to a medium-permeability simulation rock core for indoor experiments and a preparation method thereof. Background technique [0002] In the oil recovery test in the petroleum industry, when doing indoor physical simulation experiments, it is necessary to use quartz sand to fill simulated cores with a certain permeability for experiments. The preparation of simulated cores is usually filled with quartz sand with a minimum particle size of 74-56 μm and a single particle size, and the cores are filled by beating outside the core tube. However, the prepared simulated cores all have a permeability above 500 mD. The larger the particle size of the quartz sand, the greater the permeability of the filled sandstone core. The "Reservoir Engineering Basic Knowledge Manual" [M] volume published by Petroleum Industry Press in Septem...

AI Technical Summary

Problems solved by technology

This method changes the traditional method of preparing the simulated core with dry base material and knocking outside the pipe, so that the permeability of the simulated core is in the medium permeability range, but the invention uses less quartz sand components, and the implementation steps are operable It is not strong, and the base material after wetting is difficult to be compacted in the core, etc.

Images