Wireline Coring Gas-Loss Testing With Controlled Pressure and Temperature
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Solution Overview
Problem
Existing devices fail to accurately measure gas loss amount during unconventional natural gas exploration due to their inability to replicate the environmental conditions of wireline coring and lifting processes, leading to inaccurate gas loss ratio calculations.
Innovation Solution
A device and method that simulates wireline coring by using a programmable temperature control thermostat, simulated center pipe body, gas and liquid injection control devices, and drainage and gas collection meter to replicate the temperature and pressure changes during the coring and lifting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing gas content testing devices are used, then the testing process is simple, but they cannot accurately measure gas loss amount because they fail to replicate wireline coring environmental conditions
Solution Approach 1:
The patent creates a simplified copy of the wireline coring environment by constructing a simulation system that replicates key conditions (liquid-phase filling, temperature and pressure changes) without requiring actual wireline coring operations. This allows accurate gas loss measurement while maintaining experimental control and safety.
Solution Approach 2:
The patent systematically varies temperature and pressure parameters to simulate different stages of the wireline coring process. By controlling these parameters according to actual field conditions, the device accurately reproduces the environmental changes that affect gas loss, thereby improving measurement precision.
2Measurement precision
If temperature and pressure conditions are not controlled, then the device operation is simple, but gas loss amount cannot be accurately determined due to unreplicated environmental conditions
Solution Approach 1:
The patent employs dynamic control of temperature and pressure to simulate the changing conditions during wireline coring and lifting. The system transitions from static environmental control to dynamic parameter adjustment, allowing accurate reproduction of field conditions while maintaining operational simplicity through automated control sequences.
3Reliability
If liquid-phase filling constraint is not simulated, then the experimental setup is simple, but gas escape behavior does not reflect actual wireline coring conditions
Solution Approach 1:
The patent introduces liquid-phase filling as an intermediary medium that reproduces the constraint conditions of actual wireline coring. The liquid phase acts as a mediator between the core sample and the measurement system, controlling gas escape behavior to reflect field conditions while enabling indirect but reliable measurement of gas loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Accurately measures gas loss amount and ratio by reproducing the environmental conditions of wireline coring, allowing for precise determination of gas content in core samples.
Implementation Method 1
a programmable temperature control thermostat, which is used to simulate temperature changes in a wireline coring process
Implementation Method 2
a gas injection control and recovery device, which is used for gas injection, pressurization and vacuuming inside the simulated center pipe body
Implementation Method 3
a liquid injection control and recovery device, which is used to inject water or simulated drilling fluid into the simulated center pipe body to construct a simulated drilling fluid or clean water environment inside the simulated center pipe body
Implementation Method 4
a drainage and gas collection meter, which is used to meter the drainage and gas collection of the gas-water mixed fluid discharged from the simulated center pipe body
Implementation Method 5
an elastic supporting body is used to support and fix the core sample inside the simulated coring barrel
Data Source
AI summary
The present invention discloses a device and method for testing the gas loss amount which simulates a wireline coring process, and belongs to the field of petroleum engineering. The device includes: a programmable temperature control thermostat for simulating temperature changes in a wireline coring process, a simulated center pipe body for constructing a simulated environment of the center pipe body being filled with drilling fluid or clean water, a simulated coring barrel for drilling for and retaining a core sample, a gas injection control and recovery device, a liquid injection control and recovery device, and a drainage and gas collection meter. The present invention has advantages as follows: it is simple to implement and can reproduce a real drilling and coring process to a certain extent; the simulation of the coordinated changes in liquid pressure and temperature environment experienced by the core sample lifted to a wellhead from a drilling bottom hole through the programmable temperature control thermostat and a program-controlled constant pressure valve, can truly reproduce the environmental conditions of a wireline coring barrel being filled with drilling fluid and the loss changes in gas content of the core sample with the coordinated descents in liquid-phase pressure and temperature in the liquid-phase filling environment in the core lift process.