Halliburton Energy Services, Inc.

Sriram Srinivasan

Weijun Guo

Zhijuan Zhang

Christopher Michael Jones

Ahmed Elsayed Fouda

Dongwon Lee

Michael John Christie

Kenneth Liang

Described herein are systems and techniques for monitoring substances that are injected into an Earth formation whether that be CO2 from a carbon capture and storage (CCS) process, or water or steam injected for an enhanced oil recovery (EOR) process. Components located on an outside of a wellbore casing may be electrically isolated from components located on the inside of the wellbore casing. Data and/or power may be transferred through the wellbore casing wirelessly in order to increase the reliability of a data collection system because the need for wires to be placed on the outside surface of a wellbore casing is eliminated. The components located on the outside of the casing may receive electromagnetic (EM) or transmit EM fields as part of a system that collects data about substances that are injected into Earth formations during a CCS or EOR process.

Electromagnetic systems for reservoir monitoring

A method and system for evaluating the cement behind casing and fully inverting acoustic properties of the material, including density and the speed of sound. A density map of the cement sheath is determined using a nuclear logging technique. An acoustic impedance value of the cement sheath is provided, either by measurement using an ultrasonic logging technique or simulated using an acoustic model. The acoustic model may assume a vertical incident plane wave and flat plates for casing and the cement sheath. From the density map and the acoustic impedance value, a map of the speed of sound in the cement sheath, or a gap therein, may be determined.

Logging with joint ultrasound and X-ray technologies

A tomographic imaging apparatus utilizes Compton backscattering to evaluate cement behind the casing. The imaging apparatus includes a slant-hole or pin-hole collimator coupled to a series of detectors in order to count the number of photons that backscatter off from the cement. The number of backscattered photons is proportional to the density of the cement behind the casing. Using the photon count, an image processing unit of the imaging apparatus generates a 2D or 3D tomographic image of the borehole.

Downhole tomographic imaging

In some embodiments, an apparatus, system, and method may operate to determine the density of drilling fluid associated with photon activity in the drilling fluid using an array of nuclear detectors. Further activity may include determining acoustic impedance of the drilling fluid as a combination of the density and acoustic velocity. Additional apparatus and systems, as well as methods, are disclosed.

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Katy, TX, United States of America

Sriram Srinivasan