Buried hill fissure heat liquid filling simulation experiment method

Abstract

The present invention provides a buried hill fissure heat liquid filling simulation experiment method which includes the following steps: step 1, preparing an experiment material, selecting atypical buried hill fractured type oil reservoir rock core as a filling sample, and preparing a rotary stirring autoclave as an experimental device; step 2, using the rotary stirring autoclave for high temperature and high pressure fissure heat liquid filling simulation; and step 3, after the end of the simulation experiment, weighing sample mass change difference value and change rate before and after the experiment, and through multiple sets of comparative analysis, summarizing a buried hill fissure heat liquid filling rule. The buried hill fissure heat liquid filling simulation experiment method can clarify influence of lithology, fissure properties, formation temperature, formation pressure and formation water flow rate and other factors on the fissure filling, and clarify mechanisms and rules of the fissure heat liquid filling.

Description

Technical field [0001] The present invention relates to a simulation experiment of crack filling, in particular to an experiment method for simulating the filling of cracks in carbonate 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 multiple periods of tectonic movement, forming multi-system fracture storage spaces, and have experienced different chemical fillings such as calcite and anhydrite, forming a fracture system with very strong heterogeneity. Clarify the filling mechanism and rules of fractures, and point out the distribution characteristics of fractures with low filling rate and storage performance, or known as effective fractures, which can provide a basis for geological modeling of...

AI Technical Summary

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

Images