Magnetic Ranging While Rotating
US-2015378043-A1 · Dec 31, 2015 · US
Multilevel workflow method to extract resistivity anisotropy data from three-dimensional induction measurements
US9057797B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9057797-B2 |
| Application number | US-201313874275-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 30, 2013 |
| Priority date | Oct 5, 2009 |
| Publication date | Jun 16, 2015 |
| Grant date | Jun 16, 2015 |
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Abstract
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A multi-step electromagnetic inversion method is provided for determining formation resistivity, anisotropy and dip. An electromagnetic logging tool is used to obtain non-directional, anisotropy, and directional (including symmetrized and anti-symmetrized resistivity measurements) in a formation using an electromagnetic logging tool. Bed boundaries of the formation are first identified. A horizontal resistivity profile is obtained using the non-directional resistivity measurements, and a vertical resistivity profile is obtained using the anisotropy resistivity measurements. The vertical resistivity profile is improved using the directional resistivity measurements, while dip values are also obtained via an inversion using the directional resistivity measurements. Then, an inversion for each of vertical resistivity, horizontal resistivity, dip values, and bed boundaries is performed using all of the non-directional, anisotropy, and directional resistivity measurements to obtain a formation model.
First claim
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What is claimed is: 1. A system comprising: an electromagnetic logging tool having transmitter and receiver antennas oriented as a longitudinal magnetic dipole and at least one of a tilted magnetic dipole or a transverse magnetic dipole, wherein the electromagnetic logging tool is capable of making dipole sensitive electromagnetic measurements within a surface formation; and a processor capable of: (a) determining formation layer boundaries and horizontal resistivities of the f…
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- What does patent US9057797B2 cover?
- A multi-step electromagnetic inversion method is provided for determining formation resistivity, anisotropy and dip. An electromagnetic logging tool is used to obtain non-directional, anisotropy, and directional (including symmetrized and anti-symmetrized resistivity measurements) in a formation using an electromagnetic logging tool. Bed boundaries of the formation are first identified. A horiz…
- Who is the assignee on this patent?
- Schlumberger Technology Corp
- What technology area does this patent fall under?
- Primary CPC classification G01V3/28. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jun 16 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).