公开(公告)号：US10890058B2

公开(公告)日：2021-01-12

申请号：US15453584

申请日：2017-03-08

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Kyle R. Krueger ,  Ge Jin ,  Charles C. Mosher ,  Herbert W. Swan ,  Baishali Roy

IPC: E21B43/17 ,  G01V1/42 ,  G01V1/30 ,  G01V1/22 ,  G01H9/00 ,  E21B47/113 ,  E21B47/135 ,  E21B43/26 ,  G01V1/48 ,  G06T17/05

Abstract: A workflow using techniques for improving signal-to-noise ratio and decreasing interferences for Low-Frequency Distributed Acoustic Sensing is described.

公开(公告)号：US10287874B2

公开(公告)日：2019-05-14

申请号：US15453650

申请日：2017-03-08

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Ge Jin ,  Charles C. Mosher ,  Frank P. Filice ,  Kyle R. Krueger ,  Ali Tura ,  Baishali Roy ,  Dana M. Jurick

IPC: E21B47/10 ,  E21B47/12 ,  E21B47/022 ,  G01K11/32 ,  G01H9/00 ,  G01V1/22 ,  G01V1/40

Abstract: A method of monitoring hydraulic fracturing using DAS sensors in a treatment well and/or observation well is described. The raw data is transformed using a low pass filter (≤0.05 Hz) and down-sampled to show the signal as the stimulation progresses. The resulting data can be used to optimize the hydraulic fracturing or improve reservoir models for other reservoirs.

公开(公告)号：US10370957B2

公开(公告)日：2019-08-06

申请号：US15453216

申请日：2017-03-08

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Ge Jin ,  Herbert W. Swan ,  Baishali Roy ,  Kyle R. Krueger

IPC: G01N21/47 ,  G01N25/00 ,  E21B47/06 ,  G01K11/32 ,  G01B11/16

Abstract: This disclosure describes a method of combining DAS and DTS data to accurately estimate borehole temperature. The described method takes advantage of the thermal sensitivity of DAS signal in the low-frequency band, and combines with the absolute temperature measurement from DTS, to produce a distributed temperature estimation that is up to 10000 more accurate than the current commercial solution. The DAS and DTS data should be record simultaneously at the same well. The DAS data are first low-pass filtered and then converted into temperature variation measurement. Then an accurate temperature estimation is obtained by fitting both DTS and DAS data.

公开(公告)号：US10458228B2

公开(公告)日：2019-10-29

申请号：US15453434

申请日：2017-03-08

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Ge Jin ,  Charles C. Mosher ,  Frank P. Filice ,  Kyle R. Krueger ,  Baishali Roy ,  Ali Tura ,  Dana M. Jurick

IPC: E21B47/12 ,  G01V1/22 ,  E21B47/022 ,  G01H9/00 ,  E21B47/10 ,  G01K11/32 ,  G01V1/40

Abstract: The invention relates to DAS observation has been proven to be useful for monitoring hydraulic fracturing operations. While published literature has shown focus on the high-frequency components (>1 Hz) of the data, this invention discloses that much of the usable information may reside in the very low frequency band (0-50 milliHz). Due to the large volume of a DAS dataset, an efficient workflow has been developed to process the data by utilizing the parallel computing and the data storage. The processing approach enhances the signal while decreases the data size by 10000 times, thereby enabling easier consumption by other multi-disciplinary groups for further analysis and interpretation. The polarity changes as seen from the high signal to noise ratio (SNR) low frequency DAS images are currently being utilized for interpretation of completions efficiency monitoring in hydraulically stimulated wells.

公开(公告)号：US10095828B2

公开(公告)日：2018-10-09

申请号：US15453730

申请日：2017-03-08

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Herbert W. Swan ,  Ge Jin ,  Kyle R. Krueger ,  Baishali Roy

IPC: G06F19/00 ,  E21B47/02

Abstract: A system and method for monitoring oil flow rates along a producing oil or gas well using a Distributed Acoustic Sensing fiber is described. This system uses the low-frequency component of the acoustic signal as a measurement of temperature variations within the well. The relative flow contributions can then be inferred from these temperature fluctuations.