Shallow soil layer mechanical parameter monitoring method of freeze soil area natural gas hydrate drilling holes

A technology of mechanical parameters and natural gas, applied in the fields of earth-moving drilling, wellbore/well components, construction, etc., can solve the problems of short drilling cycle, difficult pore fluid pressure evolution, etc., to improve the technical level, enhance the practicability and scientific Sex, improve the effect of scientific

Active Publication Date: 2017-01-04
INST OF MECHANICS - CHINESE ACAD OF SCI
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the short drilling period, the disturbance in the drilling process has a great influence on the pore fluid pressure of the soil layer and the mechanical parameters of the reservoir, and the we

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Shallow soil layer mechanical parameter monitoring method of freeze soil area natural gas hydrate drilling holes
  • Shallow soil layer mechanical parameter monitoring method of freeze soil area natural gas hydrate drilling holes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: see figure 1 , figure 2 , a method for monitoring mechanical parameters of shallow soil layers in natural gas hydrate boreholes in permafrost regions, comprising the following steps:

[0017] A. Carry out cement reinforcement to the bottom of the open hole, and install anti-sand nets around the bottom of the well;

[0018] B. Make a rubber tube structure, shrinkable, cylindrical capsule coated with an anti-corrosion layer;

[0019] C. Put the cylindrical capsule into the bottom of the open hole, and install and connect the T-shaped stainless steel pipe on the cylindrical capsule, and the two interfaces at the upper end of the T-shaped stainless steel pipe are respectively connected to the injection pump and the suction pump through the pressure gauge;

[0020] D. Every 6 to 12 months, pump the water in the cylindrical capsule through the pump to make the cylindrical capsule shrink, and a cavity is formed between the soil layer and the cylindrical capsul...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a shallow soil layer mechanical parameter monitoring method of freeze soil area natural gas hydrate drilling holes. The shallow soil layer mechanical parameter monitoring method includes the steps: strengthening a well bottom; placing a cylindrical capsule into the well bottom; connecting a T-shaped stainless steel pipeline; extracting water in the cylindrical capsule; calculating pressure of pore fluid in a soil layer; pressing water into the cylindrical capsule by a liquid filling pump; calculating modulus and strength of the soil layer and the like. By the aid of online monitoring technique of long-term c in-situ rock and soil mechanics, the freeze soil area hydrate drilling holes are reasonably used, change rules of mechanics and pore fluid pressure parameters of shallow soil layers of the freeze soil area natural gas hydrate drilling holes are obtained, measurement scientificity, accuracy and reliability of pore fluid pressure and reservoir mechanics are further improved, technological level of shallow-layer natural gas hydrate reservoir exploitation of our country is improved, and environmental effect evaluation practicability and scientificity are improved.

Description

technical field [0001] The invention belongs to the technical field of natural gas exploitation, and in particular relates to a method for monitoring mechanical parameters of shallow soil layers in natural gas hydrate drilling holes in permafrost regions. Background technique [0002] At present, shallow exploration of natural gas hydrate reservoirs in my country's permafrost regions has carried out multiple drilling wells to obtain parameters such as thickness and depth of natural gas hydrate reservoirs. At the same time, the temperature and pressure in the drilling are mainly measured by temperature sensors and pressure sensors. Distribution. Due to the short drilling period, the disturbance in the drilling process has a great influence on the pore fluid pressure of the soil layer and the mechanical parameters of the reservoir, and the wellhead requires the sensor size, it is difficult to accurately obtain the shallow reservoir during the drilling process. Pore ​​fluid pre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E21B49/00E21B49/08
CPCE21B49/00E21B49/086E21B49/0875
Inventor 张旭辉鲁晓兵王淑云杨柳沈伟军魏伟张金华彭涌
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products