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Method for detecting stratigraphical boundary by using non-rotating tool

A formation boundary, non-rotating technology, applied in the field of electrical logging of oil wells

Active Publication Date: 2016-06-15
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the motorized rotation technique described in application #13 / 786,302 is only applied to the x-transmitter 304 and y-transmitter 302, so that the magnetic field can be easily transmitted in all directions

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  • Method for detecting stratigraphical boundary by using non-rotating tool
  • Method for detecting stratigraphical boundary by using non-rotating tool
  • Method for detecting stratigraphical boundary by using non-rotating tool

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Embodiment Construction

[0057] The present invention will be described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.

[0058] Embodiments of the present invention provide equipment for performing stratum boundary detection, such as Figure 4A Shown is a front view of a directional resistivity tool according to some aspects of the present invention. The directional resistivity logging tool consists of a drilling tool main part 300, two transmitters with x-axis and y-axis (one x-transmitter 304 and one y-transmitter 302, which can also be called the first a transmitter and a second transmitter), two receivers with x-axis and y-axis (an x-receiver 404 and a y-receiver 402, which can also be referred to as the first receiver and a second receiver) and a drill bit 406 installed at the end of the drill main part 300. The coordinate system (x, y, z) associated with the drill body 300 is shown. The direction of the longitudinal axis of ...

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Abstract

The invention provides a method for detecting a stratigraphical boundary by using a non-rotating tool, and relates to the field of electrical logging of oil wells. The method provided by the invention comprises the following steps: arranging a first transmitter and a second transmitter in different directions on a drilling tool main part, adjusting magnetic moments of electromagnetic signals of the two transmitters, powering on the two transmitters, adjusting signal assistance received by two receivers when measuring modulation electromagnetic signals of the two transmitters, further calculating the direction and the position of the stratigraphical boundary according to received and measured phase, and eliminating modulation vectors of the two transmitters through an electric appliance so as to stop the drilling tool main part, thereby simulating influence of mechanical rotation of the drilling tool main part, and calculating the direction and the position of the stratigraphical boundary.

Description

technical field [0001] The invention relates to the field of electrical logging of oil wells, in particular to a method for detecting formation boundaries with non-rotating tools. Background technique [0002] The use of electrical measurements such as logging while drilling (LWD), measurement while drilling (MWD) and wireline systems to gather downhole information is well known in the oil industry. This type of technology has been used to obtain well information, such as formation resistivity (or conductivity; although the two professional terms "resistivity" and "conductivity" are opposite concepts, but in this technology Often replace each other.), dielectric constant, etc., which are used to determine the petrophysical properties of formations and their corresponding fluids. The collected well information can help us delineate hydrocarbons (such as crude oil or natural gas) and other components in porous formations and determine the boundaries between different formatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/13
CPCE21B47/13E21B49/00
Inventor 刘乃震赵齐辉卢毓周李永和白锐刘策李敬曹莉莉乔冠楠
Owner BC P INC CHINA NAT PETROLEUM CORP