Method for increasing well slots without stopping production on offshore petroleum platform

Abstract

The invention provides a method for increasing well slots without stopping production on an offshore petroleum platform, comprising the following steps: (1) installing a subsea template (3) at one side of the bottom part of the original platform jacket (2); (2) removing a craw (13) on the subsea template (3); (3) inserting a steel pile (4) into a steel pile guide structure (12) of the subsea template (3), and then driving the steel pile (4) into the guide structure; (4) covering and fixing a steel pile sleeve (11) on the steel pile (4); (5) inserting a conductor tube (6) into a conductor tube guide structure (14), driving the conductor tube (6) into the guide structure and fixing the conductor tube with the guide structure together; (6) installing a connection structure (7) between the upper part of the platform jacket (2) and the conductor tube (6) of a new structure to integrate the original platform with a newly added well slot structure; and (7) installing a deck (8) on the original platform module (1), wherein, the deck (8) is positioned above the conductor tube (6). The method of the invention can greatly lower offshore operation time and construction cost, avoid shutdown during the offshore construction period and improve economic benefit for production.

Description

technical field [0001] The invention relates to a method for adding well slots to offshore oil platforms, in particular to a method for adding well slots to offshore oil platforms without stopping production. It belongs to the field of offshore oil engineering. Background technique [0002] With the increase of the production life of offshore oil platforms, the platform will face the problem of production reduction in the later stage of production. In order to make up for the insufficient production capacity, it is necessary to increase the number of production wells on the platform. However, the number of reserved well slots on some platforms is insufficient, so it is necessary to add new well slots to the old platforms to achieve the purpose of increasing production. There are mainly two ways to increase the well groove: [0003] The first method is: engineering construction needs to be carried out next to the original offshore old platform, and a new small platform is ...

AI Technical Summary

Problems solved by technology

The advantage of this method is that the project cost is low, and its disadvantage is that after the installation of the riser casing is added, the old offshore platform needs to stop production during the installation of the well slot.

[0005] Therefore, above-mentioned two kinds of methods of increasing well groove all have obvious disadvantages, can not realize the maximization of economic benefit

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