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

A technology of gravel filling and simulation system, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., to achieve the effect of true and reliable measurement, optimization of construction parameters, and optimization of gravel size

Active Publication Date: 2018-03-13
QINGDAO INST OF MARINE GEOLOGY
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  • Description
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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

Method used

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

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Embodiment 1

[0043] Example 1. A simulation system for gravel packing in a hydrate mining well tube has a 1:1 correspondence with the actual gravel packing tool, which satisfies the full-scale gravel packing tool entry and gas hydrate reservoir depth conditions, and the simulation results are highly reliable , Strong engineering practice, including test well subsystem, simulation filling subsystem and filling quality inspection subsystem.

[0044] reference figure 1 The test well subsystem includes a simulated wellbore 1, a simulated casing 2, a simulated tubing 3, a three-phase injection pipeline 8 and a mechanical screen 18. The wellhead of the simulated wellbore 1 is provided with a wellhead blowout prevention gate 5; the depth of the simulated wellbore The wellhead blowout ram is a bridge between the test well subsystem and the simulated filling subsystem. It is the main component of the test well to maintain the high pressure system. The pressure resistance is 15Mpa. The wellhead blowout ...

Embodiment 2

[0049] Embodiment 2, based on the simulation system described in embodiment 1, this embodiment also proposes a method for simulating gravel packing in hydrate mining well pipes, refer to Figure 5 , Including the following steps:

[0050] A. Install the wellbore string according to the actual wellbore structure, check the tightness of each sealing position, fill the simulation subsystem and perform the filling operation simulation;

[0051] B. The lower filling quality inspection subsystem monitors the filling quality and judges whether the filling quality is qualified. If it is unqualified, the filling operation simulation will be performed again; if it is qualified, the mixed gas, liquid, and mud will be injected to simulate the production process, and the sand production will be monitored in real time Happening;

[0052] C. Determine whether the sand control effect is qualified. If the sand control effect is unqualified, adjust the filling process parameters and re-run the fillin...

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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...

Claims

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Application Information

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IPC IPC(8): E21B43/04E21B47/00
CPCE21B43/04E21B47/00
Inventor 吴能友李彦龙胡高伟万义钊陈强卜庆涛刘昌岭
Owner QINGDAO INST OF MARINE GEOLOGY
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