Gravel filling and simulation system and method in hydrate mining well pipe

Abstract

The invention discloses a gravel filling and simulation system and method in a hydrate mining well pipe. The simulation system includes a test well subsystem, a simulation and filling subsystem and afilling quality detecting subsystem. A wellhole pipe column is installed according to an actual well structure, and filling operation simulation and filling quality detecting are conducted; not only can be full-scale simulation conducted on characteristics of an actual gas hydrate mining well reservoir and in-pipe gravel filling operation under limitation of the well structure, but also whole-process monitoring and evaluating can be conducted on the construction quality of the filling operation and adaptation of the filling operation under a long-term hydrate formation condition, so that the aim of optimizing construction parameters and process design parameters is achieved. By combining the introduction of a radial-flow flow divider, a point piezometer and an acoustic imaging logging system, the measurement effect is true and credible, the simulation result is closer to the difference construction, the reference is high, and the gravel filling and simulation system and method is suitable for gravel filling processes in different well structures and effect monitoring simulation of gravel filling. The gravel filling and simulation system and method not only provides new ideas for adaptability evaluation of the gravel filling operation of a marine shallow gas hydrate mining well, but also provides gist for a best construction scheme and best technological parameters of the gravelfilling operation.

Description

Technical field [0001] The invention relates to the technical field of marine natural gas hydrate resource development engineering, in particular to an integrated simulation system and simulation method capable of simulating the gravel filling process in a hydrate mining well pipe and evaluating its effect. Background technique [0002] Natural gas hydrate resource is a kind of unconventional natural gas resource with wide distribution and high energy density. Natural gas hydrate is the strategic commanding height of global energy development in the future. The United States, Japan, Germany, India, Canada, and South Korea have successively formulated natural gas hydrate research and development. plan. my country’s successful trial mining in the South China Sea is undoubtedly leading the world in the global competition for the exploration and development of natural gas hydrate resources. my country has now accelerated the pace of industrialized exploitation of natural gas hydrate...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to propose a simulation system and method for gravel packing in the well pipe of natural gas hydrate mining, which can simulate the operation process of gravel packing in the full-scale pipe and its operation process. Effect monitoring provides a new idea for the adaptability evaluation of gravel packing operations in shallow marine natural gas hydrate production wells, and provides a basis for the optimal construction plan and optimal process parameters of gravel packing operations

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