Experimental method for simulating hydrothermal filling of fractures in buried hills

Abstract

The present invention provides an experimental method for simulating hydrothermal filling of buried-hill fractures. The experimental method for simulating hydrothermal filling of buried-hill fractures comprises: step 1, preparing experimental materials, and selecting rock cores of typical buried-hill fractured reservoirs as filling samples , and prepare a rotating and stirring autoclave as the experimental equipment; step 2, use a rotating and stirring autoclave to simulate crack hydrothermal filling under high temperature and pressure; The rate of change, through multiple comparative analysis, summarizes the law of hydrothermal filling of buried hill fractures. This experimental method for simulating hydrothermal filling of buried hill fractures can clarify the influence of factors such as lithology, fracture properties, formation temperature, formation pressure, and formation water flow rate on fracture filling, and clarify the mechanism and law of fracture hydrothermal filling.

Description

technical field [0001] The invention relates to a simulation experiment of fracture filling, in particular to an experimental method for simulating the filling of fractures in carbonate rock buried hills by hydrothermal fluid. Background technique [0002] With the development of petroleum exploration technology and the continuous expansion of exploration fields, carbonate buried hill reservoirs have become an important type of oil and gas reservoirs in my country. Most of the buried hills discovered so far have experienced multi-stage tectonic movements, forming multi-series fractured reservoir spaces, and experienced different chemical fillings such as calcite and anhydrite, forming a fracture system with strong heterogeneity. Clarifying the filling mechanism and filling law of fractures, and pointing out the distribution characteristics of fractures with low filling rate and reservoir performance or called effective fractures, can provide a basis for geological modeling o...

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Problems solved by technology

[0003] However, the following problems still exist in the current research on fracture filling in buried hills: 1. The filling mechanism of fractures is not clear, especially the filling degree of fractures in different environments is not clear

For example, it is not clear how factors such as lithology, fracture properties, formation temperature, formation pressure, and formation water flow rate affect fracture filling; 2. The simulation experiment for fracture filling in buried hills has not been fully carried out, and there is currently a lack of systematic simulation experiments on its mechanism conduct in-depth research

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