System And Method For Controlled Pumping In A Downhole Sampling Tool
US-2015361791-A1 · Dec 17, 2015 · US
Downhole characterization of formation pressure
US2018371903A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018371903-A1 |
| Application number | US-201816014543-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 21, 2018 |
| Priority date | Jun 21, 2017 |
| Publication date | Dec 27, 2018 |
| Grant date | — |
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Abstract
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A method includes operating a downhole acquisition tool in a wellbore in a geological formation and performing formation testing using the downhole acquisition tool in the wellbore to determine at least one measurement associated within the geological formation, the wellbore, or both. The downhole acquisition tool includes one or more sensors that may detect the at least one measurement and the at least one measurement includes formation pressure, wellbore pressure, or both. The method also includes using a processor of the downhole acquisition tool to obtain a response characteristic associated with the formation, the wellbore, or both based on oscillations in the at least one measurement and determining at least one petrophysical property of the geological formation, the wellbore, or both, based on the response characteristic. The petrophysical property includes permeability, mud filter cake permeability, or both.
First claim
Opening claim text (preview).
1 . A method comprising: operating a downhole acquisition tool in a wellbore in a geological formation; performing formation testing using the downhole acquisition tool in the wellbore to determine at least one measurement associated within the geological formation, the wellbore, or both, wherein the downhole acquisition tool comprises one or more sensors configured to detect the at least one measurement, and wherein the at least one measurement comprises formation pressure, wellbore pressure, or both; using a processor of the downhole acquisition tool to obtain a response characteristic associated with the formation, the wellbore, or both, based on oscillations in the at least one measurement; and determining at least one petrophysical property of the geological formation, the wellbore, or both based on the response characteristic, wherein the petrophysical property comprises formation permeability, mud-cake permeability, or both. 2 . The method of claim 1 , wherein the response characteristic comprises a frequency response of the formation pressure. 3 . The method of claim 2 , wherein the frequency response is a transfer function according to the following relationship: T _ ( s ) = K 0 ( s D m r w ) K 0 ( s D m r m ) K 0 ( s D f r w ) K 0 ( s D f r w ) + f _ ( s ) g _ ( s ) { I 0 ( s D m r m ) K 0 ( s D m r m ) K 0 (
Assignees
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Classifications
Measuring temperature or pressure · CPC title
- E21B49/008Primary
by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor (measuring pressure E21B47/06) · CPC title
- E21B49/088Primary
combined with sampling · CPC title
with means for conveying samples through pipe to surface · CPC title
determining specific fluid parameters · CPC title
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- What does patent US2018371903A1 cover?
- A method includes operating a downhole acquisition tool in a wellbore in a geological formation and performing formation testing using the downhole acquisition tool in the wellbore to determine at least one measurement associated within the geological formation, the wellbore, or both. The downhole acquisition tool includes one or more sensors that may detect the at least one measurement and the…
- Who is the assignee on this patent?
- Schlumberger Technology Corp
- What technology area does this patent fall under?
- Primary CPC classification E21B49/008. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Thu Dec 27 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).