Neubrex Co., Ltd.

Petroliam Nasional Berhad (petronas)

Research Institute of Innovative Technology for the Earth

Petroliam Nasional Berhad

Neubrex Energy Services, Inc.

Research Institute of Innovative Technology for Th

Kinzo Kishida

Yoshiaki Yamauchi

Kenichi Nishiguchi

Mohamad Faizal Bin Abd Rahim

Ahmad Riza Ghazali

Ziqiu Xue

Che-Hsien Li

Ge Jin

Dana M Jurick

Yahei Koyamada

Masanori Nakamichi

Motohiro Nakano

Shenbin Lin

Tekken Li

Atsushi Makita

Artur Guzik

Shinzo Suzaki

Mitsunori Yokoyama

Michio Imai

Kazushige Nakao

Yukihiro Hamada

Kazumitu Watanabe

Junichi Kawabata

Shoji Seno

Hideki Nagatani

An armored DSS cable includes: an inner layer part including a first rope helically wound; and a surface layer part including an optical fiber module and a plurality of third ropes, the optical fiber module having an optical fiber and a plurality of second ropes helically surrounding the optical fiber and having a smaller outer diameter than the first rope, the third ropes having a larger outer diameter than the first rope, such that the optical fiber module and the third ropes are arranged on an identical circle and helically wound, wherein the inner layer part and the surface layer part are formed concentrically.

Armored DSS cable

An optical cable includes: an optical fiber for sensing deformation of hydrocarbon absorbing resin having a property of expanding by absorbing hydrocarbon in oil; a strand provided so as to surround the outer circumference of the optical fiber; and hydrocarbon absorbing resin filling a space between the optical fiber and the strand. The optical cable configured as described above is installed along the depth direction of a well that is a measurement subject, over the entire range thereof, and a backscatter light frequency shift signal from the optical fiber is measured by a backscatter light measurement device, to detect presence/absence of leakage of oil from the well over the entire range in the depth direction of the well.

Optical cable, optical cable monitoring system, and well monitoring method

This optical fiber distribution measurement system of distributed optical fiber sensing type includes: a tunable wavelength distributed feedback LD () for obtaining a DTSS signal through frequency shift analysis; an external resonance laser () for obtaining a DAS signal through phase shift analysis; a pulse compression coding circuit () including an intensity modulator () and an phase modulator (); an acousto-optic switch (); an erbium doped optical fiber amplifier (); a circulator (); a diversity device (); a digitizer (); a CPU (); and a serial transfer interface (). Through calculation on discrete signals sent from the digitizer (), the CPU () converts an analyzed Rayleigh frequency shift signal obtained as the DTSS signal, to phase error, and corrects an analyzed phase signal obtained as the DAS signal, by the phase error.

Optical fiber distribution measurement system and signal processing method for optical fiber distribution measurement

An optical cable () includes: a stress wave detection optical cable () having an optical fiber () and a plurality of first steel wires () which are helically wound so as to surround the optical fiber () and which are surrounded by a flexible material (); and second steel wires () different from the first steel wires (). The stress wave detection optical cable () and the plurality of second steel wires () are helically wound to form one annular body as a whole, and a winding angle (α) of the stress wave detection optical cable () with respect to the axis is determined by a property value prescribed by Lamé constants of the flexible material ().

Optical cable

A method creates a fluid communication path between a first production well and a second production well. At least one hydraulic fracture intersects the first production well and is separated from the second production well by a wall thereof. The method includes identifying, from the second production well, a location of the hydraulic fracture of the first production well, and perforating the wall of the second production well at the identified location. The perforating creates the fluid communication path between the production wells. Injection of fracking fluid and proppant at the first production well allows for additional fluids to be extracted from the second production well, thus generating a flow between the two production wells through the hydraulic fracture.

Systems and methods for creating a fluid communication path between production wells

A magnetic field measurement cable () of the present disclosure includes an electric cable () provided at an axial part, and an outer circumferential cable () provided on the outer side of the electric cable () and helically formed by a plurality of steel wires helically wound and a magnetic field measurement optical cable () having an optical fiber cable ().

Magnetic field measurement cable and distributed-type well inside magnetic field measurement system

An oil well production method in which a plurality of producers are arranged in a horizontal direction, includes boring a monitor well adjacent to one of the producers in the horizontal direction, installing a measurement optical fiber cable in the monitor well, performing Brillouin measurement and Rayleigh measurement for a strain distribution, a pressure distribution, and a temperature distribution of the monitor well along the measurement optical fiber cable over a period in which a fracture occurs hydraulically in the producers and an oil producing period, analyzing data measured through the Brillouin measurement and the Rayleigh measurement, and determining an arrangement interval of the producers in the horizontal direction and a hydraulic fracturing parameter.

Using fiber-optic distributed sensing to optimize well spacing and completion designs for unconventional reservoirs

A monitoring humidity measurement system includes: a humidity measurement optical fiber including a first optical fiber and a humidity detection layer provided so as to annularly cover the first optical fiber; a reference optical fiber including a second optical fiber; a plurality of optical communication cables; and a signal processing device configured to, with a laser beam entering into the first and second optical fibers, calculate and obtain Brillouin frequency shift and Rayleigh frequency shift of backscatter light from the first and second optical fibers based on the entering laser beam, and store predetermined constants, wherein reference data and target data are measured from the Rayleigh frequency shift and an initial humidity value calculated from the Brillouin frequency shift, and the value of humidity at the present time is calculated on the basis of Rayleigh frequency shift per unit humidity calculated from a difference between the above two data.

Monitoring humidity measurement system and monitoring humidity measurement method

In a measurement requiring a high space resolution using S-BOTDR, a pulse train composed of a plurality of pulses having the interval between the pulses longer than the phonon lifetime is interpulse-code-modulated. A Golay code is used for the interpulse code modulation to eliminate the sidelobes of the correlation in using a technique of correlation. In a technique without using correlation, an Hadamard matrix is used for the interpulse code modulation and the resultant matrix is inverted in the signal processing.

Brillouin scattering measurement method and Brillouin scattering measurement device

A DPTSS fiber optic cable includes an optical fiber sheathing cylindrical metal tube accommodating a pressure sensor optical fiber and having a plurality of through holes formed therein; and pressure blocking sections formed at intervals in the axial direction of the cable.

Fiber optic cable for measuring pressure, temperature, and strain distributions

Initial data and target data are frequency-analyzed to obtain an initial Rayleigh-scattering spectrum (RSS) and a target RSS, respectively. A distance correction is performed for the target RSS by comparing the target RSS with the initial RSS, and a Rayleigh spectrum shift is determined on the basis of a correlation coefficient between the initial RSS and the target RSS after distance-corrected.

Rayleigh measurement system and Rayleigh measurement method

A distributed pressure, temperature, strain (DPTS) sensing cable includes at least two slotted fiber optic metal wires each having a slot groove extended along in an outer circumference of the wires to encapsulate optical fibers in the slot grooves. The two slotted fiber optic metal wires have characteristics different from each other.

Distributed pressure, temperature, strain sensing cable using metal wires with slot grooves and optical fibers in the slot grooves

A distributed fiber optic acoustic detection device employs a novel distributed acoustic detection method using a phase noise cancelling distributed acoustic sensing (PNC-DAS) technique.

Distributed fiber optic acoustic detection device

A fiber optic biodiagnostic sensor system includes a blood vessel insertable pressure distribution measurement device to be inserted in vivo into a blood vessel to measure distributions of temperature and pressure of an object to be measured along a predetermined site, the device having an SM optical fiber deformable by temperature and strain, a structural member being in contact with a portion of the optical fiber to convert pressure of the to-be-measured object to strain of the optical fiber; and an outer layer converting the optical fiber and the structural member. The sensor system further includes a measurement unit emitting laser light into the SM optical fiber, detecting a frequency shift produced in the scattered light, and calculating a blood pressure at a given position of the optical fiber from a pressure change and a strain change of the SM optical fiber that are calculated from the frequency shift.

Fiber optic in vivo diagnostic sensor system and blood vessel insertable pressure distribution measurement device

Distributions of a Brillouin frequency shift and a Rayleigh frequency shift in optical fibers set up in a material are measured from scattered waves of pulse laser light entered into the optical fibers, and distributions of pressure, temperature, and strain of the material along the optical fibers at a measurement time point are analyzed using coefficients that are inherent to the set up optical fibers and correlate pressure, temperature, and strain of material with the Brillouin frequency shift and the Rayleigh frequency shift.

Distribution measurement system for pressure, temperature, strain of material, monitoring method for carbon dioxide geological sequestration, assessing method for impact of carbon dioxide injection on integrity of strata, and monitoring method for freezing using same

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Kobe, Japan

Kinzo Kishida