Method for intercepting and connecting underground formations and method for producing and/or injecting hydrocarbons through connecting underground formations
a technology of underground formations and underground formations, which is applied in the direction of directional drilling, artificial islands, borehole/well accessories, etc., can solve the problems of compromising the production area of hydrocarbons in the production area, unable to tap hydrocarbons in the water zone at depths of 3000 m currently, and unable to achieve the current physical, financial and technological limits of well construction and/or hydrocarbon flow, etc., to achieve simple connection of two oil wells, reduce costs cos
Inactive Publication Date: 2006-12-14
PETROLEO BRASILEIRO SA (PETROBRAS)
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Benefits of technology
[0021] Connecting sub-surface oil wells allows full exploitation of underground formations to be feasible, substituting or reducing the number of locations. Also, the method presented in this invention allows production/injection through fixed production units, connecting drilled wells such as maritime production units. Said maritime production units may be fixed or may be semi-submerged ships so that flowing from the well will take place in fixed production units. This means a drastic reduction in production costs and will revitalize financially mature sites. Therefore, using the method presented by this invention in deep water allows the production flow of hydrocarbons in deep waters towards shallower water in the bottom of the well, or that which is done today at the bottom of the sea through production lines, and because they are subject to environmental conditions, they create technical and economical limi
Problems solved by technology
At times, this strategy becomes impossible in view of current physical, financial, and technological limits for well construction and / or hydrocarbon flow.
For example, hydrocarbons in zones with water at depths of 3000 m currently cannot be tapped.
When the connection between the offshoots of the lateral wells with the main well becomes interrupted or obstructed, it can affect the production of hydrocarbons proceeding from the offshoots or can affect the fluid injection, indirectly compromising the production of hydrocarbons in the production area.
However, the described methods in the patents above only deal with determining distances between parallel wells.
When this does not take place, drain off is accomplished through fractures in underground formations, without an effective interception and mechanical connection between wells.
Method used
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[0028] The method of interception and connection of the wells proposed by this invention shall now be described as referenced in FIGS. 1 and 2. It should be noted that the Figures represent the geometry of the multilateral wells, indeed, this method may be applied to any type of drilled well through proper geometry, in order to reach underground formations.
[0029]FIGS. 1 and 2 show the method for interception and connection of multilateral wells that are composed of the following stages:
[0030] 1. Drill and complete the primary multilateral well 1;
[0031] 2. Drill at least one second multilateral well 2 located at a point away from the head of the well of the primary multilateral well 1, with a production probe providing support to the primary multilateral well 1;
[0032] 3. Intercept the primary multilateral well 1 from the second multilateral well 2, by using a proper tool, such as for example, a magnetic emitter;
[0033] 4. Mechanically connect the primary multilateral well 1 with ...
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The present invention relates to a method for intercepting and connecting underground formations containing hydrocarbons, so as to make the production and injection of hydrocarbons technically and financially feasible in land and offshore oil production zones. It is claimed to be a method for the production and / or injection of hydrocarbons through thusly connected underground formations.
Description
[0001] This application is based on, claims the benefit of priority of, and incorporates hereby by reference the contents of Brazilian Patent Application No. PI 0502087-5 filed on Jun. 9, 2005. SCOPE OF THE INVENTION [0002] The present invention relates to a method for intercepting and connecting underground formations containing hydrocarbons, so as to make the production and injection of hydrocarbons technically and financially feasible in land and offshore oil production zones. It is presented as a method for the production and / or injection of hydrocarbons through connected underground formations. FUNDAMENTALS OF THE INVENTION [0003] To increase the extraction of underground formations containing hydrocarbons, when possible, wells are drilled horizontally, vertically, directionally and multilaterally. The fluid produced from these formations is extracted through the top of the well and thereafter, through diverse means (pipes, land transport), this fluid is routed to the refinerie...
Claims
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Login to View More IPC IPC(8): E21B43/24E21B41/00E21B43/17
CPCE21B43/305
Inventor SOTOMAYOR, GABRIEL PAULO GUTIERREZDA SILVA ARAUJO, ROMERO GOMES
Owner PETROLEO BRASILEIRO SA (PETROBRAS)