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Methods for characterization of formations, navigating drill paths, and placing wells in earth boreholes

一种地层、钻井的技术，应用在特征化目标地层和用于例如在定向钻井期间准确地布置井领域

Inactive Publication Date: 2012-10-10
PRAD RES & DEV LTD
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

However, there is still considerable room for improvement in the characterization of these functions and the target formations and their reservoirs, and the goal is to achieve such improvements

Method used

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  • Methods for characterization of formations, navigating drill paths, and placing wells in earth boreholes
  • Methods for characterization of formations, navigating drill paths, and placing wells in earth boreholes
  • Methods for characterization of formations, navigating drill paths, and placing wells in earth boreholes

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Embodiment Construction

[0070] figure 1 A wellsite system is shown in conjunction with which the invention may be practiced. Well sites may be onshore or offshore. In this exemplary system, wellbore 11 is formed in subsurface formation 30 by rotary directional drilling.

[0071] A drill string 12 is suspended within the borehole 11 and has a bottom hole assembly 100 comprising a drill bit 105 at its lower end. The surface system includes a platform and mast assembly 10 that includes a rotary table 16 , a kelly 17 , a hook 18 and a swivel 19 positioned above a wellbore 11 . The drill string 12 is rotated by a turntable 16 powered by means not shown, which engages a kelly 17 at the upper end of the drill string. A drill string 12 is suspended from a hook 18 connected to a traveling block (also not shown) by a kelly 17 and a swivel joint 19 which allows the drill string to rotate relative to the hook. A top drive system may optionally be used, as is known.

[0072] In the example of this embodiment...

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Abstract

A method for directing borehole drilling in a target earth formation includes the following steps: providing drilling equipment having a bottom hole assembly that includes a controllable directional drilling subsystem, and a logging-while- drilling directional measurement tool with a look-around and look-ahead capability; determining the presence of a predetermined type of formation characteristic in the target formation; and navigating a drill path in the target formation with the drilling equipment, including receiving measurement signals from the directional measurement tool, obtaining, from the received measurement signals, indications of formation parameters with respect to the formation characteristic in the target formation, and controlling the directional drilling subsystem to drill in a direction determined as a function of the obtained indication of formation parameters.

Description

[0001] priority claim [0002] Priority is claimed from US Provisional Patent Application No. 61 / 253,248, filed October 20, 2009, which is incorporated herein by reference. technical field [0003] The present invention relates to the field of drilling and surveying in subterranean wellbores, and more particularly to methods for characterizing target formations and for accurately placing wells, eg, during directional drilling. Background technique [0004] The advent of directional drilling and logging while drilling (LWD) and measurement while drilling (MWD) has greatly improved the location and placement of wells for producing hydrocarbon resources. Directional drilling involves drilling wells along deviated routes for various purposes, including bottoming out in a specific target area. Directional drilling is used, for example, to obtain a proper wellbore trajectory in a pay formation bed (or "pay zone"), and then drill substantially within the pay zone. Wells drilled h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/02E21B45/00G01V9/00
CPCE21B47/02E21B47/026G01V3/20E21B7/06
Inventor J·赛都Y·H·周
Owner PRAD RES & DEV LTD
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