Rapid measuring device applicable to multiple coring devices for saturation degree of hydrate in hydrate sediment and method

Abstract

The invention discloses a rapid measuring device applicable to multiple coring devices for the saturation degree of hydrate in hydrate sediment and a method. The rapid measuring device comprises a hydrate sediment decomposition reaction kettle, wherein both a constant balance water / hydrate inhibitor injection valve and a ball valve are connected with the bottom of the reaction kettle; the ball valve is connected with a pressure keeping cylinder of a coring device and equipped with a transfer device of pressure keeping cylinders of different specifications; a pressure release and a liquid / gas collection separation system are connected with the top end of the reaction kettle; the liquid / gas collection separation system is connected with a vacuuming system; temperature and pressure collectionsystems inside the systems and electromagnetic valves are respectively connected with a computer. The invention further discloses a method for rapidly measuring the saturation degree of hydrate in the hydrate sediment. The device is applicable to pressure keeping cylinders of multiple specifications and situations that pressure-keeping cutting and sample core transferring cannot be achieved, rapid measurement on the saturation degree of the hydrate in the hydrate sediment is achieved, and instructions on contents of hydrates are provided for hydrate exploitation and exploration process.

Description

technical field [0001] The invention belongs to the technical field of basic physical property measurement of unconventional oil and gas reservoir engineering and geotechnical engineering, and specifically relates to a rapid measurement device and method for hydrate saturation in hydrate deposits suitable for various coring devices. Background technique [0002] With the reduction of the recoverable amount of conventional oil and gas reservoirs, more and more people pay attention to unconventional oil and gas reservoirs, and gas hydrate, as an unconventional oil and gas reservoir with huge carbon storage, has inevitably become a research topic. focus. my country's South China Sea and the Qinghai-Tibet Plateau are rich in natural gas hydrate resources. In May 2017, the trial production of natural gas hydrate in the Shenhu area of ​​the South my country Sea was successful, and the exploitation of natural gas hydrate entered a new chapter. However, the structure of gas hydrat...

AI Technical Summary

Problems solved by technology

However, the existing on-site measurements of hydrate saturation almost all use the conductivity method, acoustic method or NMR method. These methods all use empirical fitting methods to reflect the hydrate saturation rather than the real hydrate saturation. The cost of the instrument is high and the error is large

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