Raw material gas well mouth pressurization post-processing system and method

Abstract

The invention discloses a raw material gas well mouth pressurization post-processing system and method. The system comprises a high-efficiency slug flow collecting system, a vertical gas-liquid separation system, a hydrocarbon pump system, an emergency drainage system, a monitoring system and a logic control system. According to control rules and design requirements of a slug flow collector and with combination of liquid level control characteristics of a gas-liquid separator, from the point of view of improving efficiency of slug flow collector and optimizing control of the system, a scheme for combination of the micro liquid accumulation plug flow collector and the vertical gas-liquid separator is put forward, the slug flow collecting capacity of the slug flow collector is reserved to the maximum extent, the process of an electric pump is optimized, the control level and gas-liquid uniformity of a downstream medium are improved, a rapid discharge function is achieved, and the adaptability of the system to large slug flow is expanded.

Description

technical field [0001] The invention relates to a raw material gas pretreatment system and method before wellhead pressurization. Background technique [0002] With the continuous development of remote gas fields, the problem of single well pressure attenuation is unavoidable and the individual wells are not synchronized with each other. It is valued and considered to be one of the most economical and feasible solutions. In the post-stage wellhead pressurization of a single well, pressurization equipment can be deployed according to the actual production capacity, wellhead pressure and other factors, and the integrated pressurization skid with strong mobility and excellent performance is selected, focusing on reliable technology, simplified equipment and optimized process. The wellhead pressurization system mainly includes the pretreatment system before pressurization, pressurization system, power system and auxiliary system, etc. Each system needs to be carefully and optim...

AI Technical Summary

Problems solved by technology

[0004] At present, for the pretreatment system before wellhead pressurization, the conventional technology mainly considers slug flow capture, gas-liquid separation and related liquid level control, flow regulation and other issues, which to a certain extent control the liquid content of the wellhead medium, The impact of liquid outlet slug flow on compressor operation, but there are still some problems: (1) Multiple sets of liquid level control systems are used to independently control the liquid level of the slug flow catcher and gas-liquid separator, resulting in slug flow The normal operating liquid level of the trap is relatively high, which causes the slug flow collection capacity to weaken, and has a great impact on its use efficiency; "Pump" intermittent control mode discharges liquid from the slug catcher and gas-liquid separator, which may cause problems such as frequent start and stop of the pump, and difficulty in simultaneously discharging liquid from two containers (slug flow catcher and gas-liquid separator); (3) There is no redundant solution to deal with the slug flow fluctuation problem. Once the slug exceeding the tank volume flows into the tank, it is very likely to cause the system to stop immediately. Further consideration should be given to the slug flow rapid drainage solution to increase the system adaptability

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