Sanding simulation measuring device and method for marine natural gas hydrate reservoir mining process

Abstract

The invention relates to a sanding simulation measuring device and method for marine natural gas hydrate reservoir mining process. The sanding simulation measuring device comprises a seawater storagetank, a sand filling pipe, seawater intrusion simulation pipelines, a gas-water-sand separating device, a sand / water receiver and a high and low temperature test chamber. The seawater storage tank andthe sand filling pipe are placed in the high and low temperature test chamber, and a pipe cavity of the high pressure sand filling pipe is connected with the seawater storage tank through the seawater intrusion simulation pipelines. The inlet end of the high pressure sand filling pipe is connected with a high pressure gas source through a gas injection pipeline and a gas injection valve, and theoutlet end of the high pressure sand filling pipe is connected with the gas-water-sand separating device through a mining pipeline and a connecting valve. The gas-water-sand separating device is placed in atmosphere and is in a funnel shape, and a first on-off valve is arranged at the bottom outlet of the gas-water-sand separating device. A gas recovery pipeline is arranged on the top of the gas-water-sand separating device, the inlet end of the gas recovery pipeline extends into the gas-water-sand separating device, and a back pressure valve is arranged on the gas recovery pipeline. The sand / water receiver is arranged below the first on-off valve of the bottom of the gas-water-sand separating device.

Description

technical field [0001] The invention relates to an oil and gas production simulation device and method, in particular to a simulated measurement device and method for sand production capability in the depressurization exploitation process of marine natural gas hydrate reservoirs considering seawater intrusion. Background technique [0002] Natural gas hydrate is an ice-like clathrate crystal formed by water molecules and hydrocarbon gas molecules mainly composed of methane under suitable conditions. According to statistics, the world's land areas that are conducive to the formation and distribution of gas hydrates account for 20% of the world's total land area, and ocean areas account for 90% of the world's total ocean area. According to incomplete statistics, the carbon stored in natural gas hydrates is at least 1*10 3 t is about twice the sum of the carbon content in all currently proven fossil fuels. In particular, the huge reserves of marine gas hydrates have attracted...

AI Technical Summary

Problems solved by technology

One of the main reasons is that compared with conventional oil and gas reservoirs, the solid medium in natural gas hydrate reservoirs does not have good cementation. With the decomposition of hydrates, the stability of the reservoir will be significantly reduced, and the solid medium and water will With the production of natural gas produced by the decomposition of hydrate, the production cost will be increased, and even the production well will be blocked and geological disasters will occur

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