Manufacturing method of three-dimensional large-sized artificial rock core

Abstract

The invention discloses a manufacturing method of a three-dimensional large-sized artificial rock core. The manufacturing method comprises the following steps: (1) producing a mold according to a size of a prefabricated three-dimensional large-sized artificial rock core; (2) filling the mold with a mixture of skeleton particles, formation water and a cementing agent, wherein the granularity distribution of the skeleton particles is consistent with that of the natural rock core; (3) pressing the mixture in the mold; and (4) roasting the pressed mold, and shaping. The granularity distribution, porosity, permeability, cementing degree and pore throat characteristics, mechanical properties and the like of the rock core are approximate to the natural rock core; and the manufactured rock core can substitute a reservoir core to perform the macro experimental research. The rock core manufactured by the invention can simulate a sedimentary rhythm and structural configuration of a real reservoir. The rock core manufactured by the invention can simulate different completion conditions and well pattern modes and can realize the indoor experiment under the high pressure condition.

Description

technical field [0001] The invention relates to a method for manufacturing a three-dimensional large-scale artificial rock core, which belongs to the petroleum field. Background technique [0002] In the process of petroleum exploration, development and production, core flow experiments are required to solve many problems. Due to the difficulty and high cost of natural cores, artificial cores are usually used instead of natural cores for physical simulation experiments. [0003] At present, the cores used in laboratory experiments mainly include plunger cores, full-diameter cores and large-scale cores. Among them, the plunger core can simulate the flow in one-dimensional space, and is widely used in microscopic research. Full-diameter cores can simulate flow in two dimensions and are more representative than plunger cores. Macroscopic research mainly uses 3D large-scale cores, and 3D physical models mainly include sand filling models, glass etching models, and sintering m...

AI Technical Summary

Problems solved by technology

The sand-packing model can only be carried out under low pressure conditions, the glass model is visible but cannot meet the requirements of medium and high pressures, and the sintered model is quite different from the reservoir in terms of mechanical properties and cementation degree

The above model cannot meet the requirements of the experiment on temperature and higher pressure, and cannot simulate different well completion conditions, reflecting the macroscopic characteristics of injection-production well groups and injection-production well intervals.

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