Treatment of produced hydrocarbon fluid containing water

摘要

A method for treating a flow of fluid hydrocarbons containing water includes introducing the flow of fluid hydrocarbons into a first separator and separating at least free water from said flow of fluid hydrocarbons, wherein a remainder of said fluid hydrocarbon flow is introduced into a system converting free/condensed water in the fluid hydrocarbon flow in said system to gas hydrates, and providing at least a first fluid flow and a second fluid flow, wherein said first fluid flow is a liquid phase including gas hydrates, said first fluid flow is recycled into the first separator, and wherein the second fluid flow has a content of dry gas and/or condensate/oil. A system for treatment of a flow of fluid hydrocarbon fluid containing water includes the following elements listed in the flow direction and connected with each other: connection to a hydrocarbon production source (1), a first separator (3) operative to separate at least free water from said fluid flow, a converting system (5) for converting free/condensed water to gas hydrate, a pipeline (6, 18) for transporting a dry gas or condensate/oil; and in addition a line (7′) which leads from the converting system (5) to the first separator (3) providing a first recycling flow including gas hydrates.

主权项

1. A method for treating a fluid hydrocarbon flow containing water, wherein the fluid hydrocarbon flow is a production flow from at least one wellbore, said method comprising:
introducing the fluid hydrocarbon flow into a first separator, and introducing a first fluid flow into the first separator, wherein the first fluid flow is a liquid phase which includes gas hydrates, and wherein a temperature in the first separator is above 20° C. so as to melt the gas hydrates into free water; separating out most of the free water from the fluid hydrocarbon flow and the first fluid flow in the first separator, such that a remainder flow of the fluid hydrocarbon flow and the first fluid flow is taken out of the first separator and introduced into a converting system; converting, in the converting system, free/condensed water in the remainder flow to gas hydrates; and thereafter separating a resulting fluid flow from the converting system into at least the first fluid flow and a second fluid flow, wherein the first fluid flow is directly recycled into the first separator, and wherein the second fluid flow having a content of dry gas and/or condensate/oil is conveyed for transport in a pipeline.