摘要:
Systems and methods for separating paramagnetic material in wellbore return fluid. A quadrupole magnet system is disposed along conduit so that a paramagnetic field is symmetrically formed about a central axis of the conduit. A wellbore return fluid containing paramagnetic material is directed through the conduit. The paramagnetic field drives the paramagnetic material outward towards the perimeter of the conduit, thereby concentrating fluid with little or no paramagnetic material along the central axis of the conduit. An outlet is disposed along the flow path of a portion of the concentrated fluid. In some embodiments, the outlet is positioned along the central axis, while in other embodiments, the outlet is positioned along the conduit wall. The paramagnetic material may be weighting material used to prepare drilling mud.
摘要:
Disclosed are traceable polymeric additives that comprise a tagging material and methods of using the traceable polymeric additives in subterranean applications, such as cementing. An embodiment discloses a method of well treatment comprising introducing a fluid comprising a traceable polymeric additive into a wellbore, wherein the traceable polymeric additive comprises a polymer and a tagging material.
摘要:
A system and method for measuring properties of a sample utilizing a variable integrated computation element (ICE) formed of one or more layers of film that is physically sensitive to an electrical field or a magnetic field applied through the material. The thickness of a layer, and hence the optical properties of the ICE, can be electrically or magnetically altered to adjust the ICE for a analysis of a particular property of the sample, or to calibrate the ICE or to adjust the ICE to compensate for alterations to the ICE resulting from environmental conditions. The film may be formed of electrostrictive materials, piezoelectric materials, magnetorestrictive materials, and/or piezomagnetic materials.
摘要:
Disclosed are systems and methods of producing from multiple production zones with a single trip multi-zone completion system. One method includes arranging an outer completion string within an open hole section of a wellbore, the outer completion string having at least one sand screen disposed thereabout, extending a production tubing within the outer completion string, the production tubing having at least one interval control valve disposed thereon, communicably coupling the production tubing to the completion string at a crossover coupling having one or more control lines coupled thereto, actuating the at least one interval control valve to initiate production into the production tubing at the at least one interval control valve, and measuring one or more fluid and/or well environmental parameters external to the outer completion string with a surveillance line communicably coupled to one or more control lines at the crossover coupling.
摘要:
A formation core analysis system can include an inner barrel and a toroidal electromagnetic antenna which transmits electromagnetic signals into a formation core when the core is received in the inner barrel. Another formation core analysis system can include an inner barrel and multiple longitudinally spaced apart electrodes which electrically contact a formation core when the core is received in the inner barrel. A speed of displacement of the core into the inner barrel may be indicated by differences between measurements taken via the electrodes as the core displaces into the inner barrel. A method of measuring resistivity of a formation core as the core is being cut can include transmitting electromagnetic signals into the core from a toroidal electromagnetic antenna as the core is being cut by a coring bit.
摘要:
Various resistivity logging tools, systems, and methods are disclosed. At least some tool embodiments include transmit and receive antennas that measure the electromagnetic response of the formation, at least one of which is tilted to provide a directional sensitivity. A processor converts the response (measured as a function of the tool's rotation angle) into a set of inversion parameters, which are then used to estimate the anisotropic properties of the formation. The set of inversion parameters includes at least one parameter based on an antipodal sum of the response signal, and may further include parameters based on an antipodal difference and an average of the signal response. Antipodal sum and difference values at different rotational orientations can be included in the set of inversion parameters, and they may be normalized to reduce environmental effects. Some tool embodiments collect the relevant formation measurements using parallel or perpendicular tilted antennas.
摘要:
In some embodiments, an apparatus and a system, as well as a method and an article, may operate a pump to obtain a formation fluid sample from a formation adjacent to a wellbore disposed within a reservoir, to detect a phase behavior associated with the fluid sample, and to adjust the volumetric pumping rate of the pump while repeating the operating and the detecting to maintain the pumping rate at a maintained rate, above which the phase behavior changes from a substantially single phase fluid flow to a substantially multi-phase flow. Additional apparatus, systems, and methods are disclosed.
摘要:
An artificial neural network, ANN, and method of training the ANN for inversion of logging tool signals into well logs of formation parameters is disclosed. Properly selected synthetic models of earth formations are used to train the ANN. The models include Oklahoma and chirp type of formations. In each model parameter contrasts of from 10 to 1 to about 100 to 1 are included. Models including maximum and minimum parameter values spanning the operating range of the selected logging tool are included. Parameter contrasts at interfaces are limited to realistic values found in earth formations. The selected models are used to generate synthetic tool signals, which are then used as inputs to the ANN for training. When the ANN coefficients are properly adjusted to produce an output matching the original models, the ANN can be used for inversion of any real signals from the selected logging tool.
摘要:
An abrasive composition comprising a substrate selected from the group consisting of a fibrous substrate, a sponge substrate, and combinations thereof and a plurality of calcium carbonate particles dispersed therein; wherein at least a portion of the plurality of calcium carbonate particles contact the substrate; wherein the fibrous substrate comprises a plurality of fibers; wherein each fiber of the plurality of fibers is characterized by an aspect ratio of equal to or greater than about 2:1; wherein the sponge substrate is characterized by a porosity of equal to or greater than about 5 vol. %, based on the total volume of the sponge substrate; and wherein the abrasive composition is characterized by an abrasiveness that is greater than the abrasiveness of the substrate in the absence of the plurality of calcium carbonate particles.
摘要:
A side-looking Nuclear Magnetic Resonance (“NMR”) logging tool is designed to reduce and/or eliminate a borehole signal. The logging tool includes a magnetic assembly and a radio frequency (“RF”) transceiver antenna. The axial extent of the RF transceiver antenna has a length selected to reduce a borehole signal.