An inner ring cemented anti-channeling flow resistant high temperature and high salt sand filling pipe

Abstract

The invention relates to an inner ring cemented fluid-channeling-preventing, high-temperature-resistant and high-salinity-resistant sand-filled pipe. The sand-filled pipe comprises a hollow pipe body,an inlet plug and an outlet plug, wherein one end of the hollow pipe body is an inlet end while the other end of the hollow pipe body is an outlet end; the inlet plug is mounted at the inlet end of the hollow pipe body; the outlet plug is mounted at the outlet end of the hollow pipe body; a filling medium for simulating a porous medium is arranged in the hollow pipe body; the filling medium is formed by mixing and cementing smearing epoxy resin, a curing agent and the filling medium; an inlet is formed in the inlet plug; and an outlet is formed in the outlet plug. The problem that the fillingmedium is not closely attached to the inner wall of the pipe to cause boundary fluid channeling can be solved effectively, and accuracy of experiment results is ensured; and moreover, a cemented coating can resist high temperature and high salinity, the problem that a conventional stainless steel material is poor in salinity resistance and corrosion resistance at high temperature is solved effectively, a high-temperature and high-salinity experiment can be carried out by a sand-filled physical model pipe processed from the conventional stainless steel material, and thus, the using cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of physical simulation experiments for oil and gas field development, and in particular relates to an inner-ring cemented anti-channeling flow-resistant high-temperature and high-salt sand filling pipe. Background technique [0002] In the fields of chemical flooding and microbial flooding in oil and gas field development, it is necessary to investigate the seepage behavior, displacement capacity and mechanism of displacement fluid (or displacement agent) through indoor physical simulation of porous media in oil and gas reservoirs from a macro perspective. Existing macroscopic physical simulation models mainly include sand-filled physical model tubes, artificial cores, and natural cores. Among them, sand-filled physical model tubes have become indispensable in macroscopic physical simulation due to their simple processing technology, low processing cost, and convenient use. , the most commonly used and widel...

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Problems solved by technology

Since the filling medium in the last short space is not compacted and the density is not enough, the filling medium will inevitably migrate to a certain extent during the experiment, which will lead to problems such as channeling of the displacement fluid

[0005] On the other hand, due to the characteristics of high temperature resistance and strong pressure bearing capacity, sand-filled physical model pipes made of stainless steel are currently the most commonly used physical model pipes for indoor research, of which 304L and 316L stainless steel are mainly made The model tube is easily corroded under high temperature and high salt conditions, showing the problem of poor salt resistance at high temperature, while Hastelloy alloy and titanium alloy with good salt resistance at high temperature are expensive, and the cost of use is relatively high

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