Underground layered gas-liquid two phase fluid pressure and temperature-retaining sampling device

Abstract

The invention discloses an underground layered gas-liquid two phase fluid pressure and temperature-retaining sampling device, which is arranged on the inner wall of a drilled hole or a sleeve and consists of a packer system, a liquid sample inlet system, a gas sample inlet system, an automatic multi-way valve, a sampling system, a temperature control system, and an external pressure/flow control system, wherein a thermal-insulation layer or temperature control system covers the outside of the entire sampling device. The device accurately controls the layer under ground fluid sampling positionto realize gas and liquid fluid sampling at different layer positions of a stratum, ensures the temperature and pressure in a sampling process are consistent with those of the underground fluid, and improves the pressure and temperature-retaining degree of the fluid in the sampling process. The principle of the device is simple, the parts are assembled simply and the device is suitable for multilayer sampling in a drilled well and underground gas-liquid two-phase fluid sampling.

Description

technical field [0001] The invention relates to the field of fluid sampling in deep formations, and more particularly relates to a fidelity sampling device for stratified gas-liquid two-phase fluid in a well, which is suitable for fidelity sampling of underground fluids. Background technique [0002] Subsurface fluids (including oil, oil and gas, groundwater, gas reservoirs, brine and other subsurface fluids) survey work includes understanding the characteristics and natural conditions of subsurface fluids, fluid components, concentrations, distribution ranges, and their transmission conditions and conditions in the underground environment. Change trends, as well as the potential hazards of fluids to people's health and living environment. Sampling technology occupies a very important position in the study of subsurface fluids (including petroleum, oil and gas, groundwater, gas reservoirs, brine and other subsurface fluids). Countries all over the world attach great importa...

AI Technical Summary

Problems solved by technology

They have their own characteristics, but in general, they cannot accurately control the sampling rate and volume, nor can they completely guarantee that the temperature and pressure conditions of the sampling and the sampling state are consistent; at the same time, they cannot satisfy the simultaneous sampling of multi-layer underground formations, which can no longer meet the modern requirements. Requirements for high-precision analysis

[0004] In modern engineering applications, the requirements for sampling accuracy and sample fidelity are getting higher and higher. Traditional sampling methods are faced with difficulties in controlling the sampling speed and sampling volume, and the sampling pressure and temperature cannot be maintained.

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