Apparatus and method for real time and real flow-rates measurements of oil and water cuts from oil production

An apparatus configured for the real time and real volume measuring of flow-rate and cut of the production of a complex fluid, comprising a magnetic resonance sensor module, a pulsed pre-polarization magnetic module of variable length, and a control computer for the acquisition and transfer of data, all of which are mutually associated;

• wherein, the magnetic resonance sensor module comprises:
• a device configured to generate a constant and homogeneous magnetic field;
• a radio-frequency exciting/receiving antenna;
• a radio-frequency electronic module for magnetic resonance;
• and
• a magnetic resonance digital module;
• wherein, said magnetic resonance digital module comprises:
• a radio-frequency signal generator;
• a pulse generator, said generator providing a plurality of synchronized command pulses;
• a device for the digitalization of the magnetic resonance signal, which device comprises a plurality of receiving/digitalization channels;
• and
• a plurality of connection interfaces from said control computer to said digital module, said magnetic resonance sensor module and said pre-polarization module.

An arrangement configured for the sequential measurement of flow-rate and cut of a complex fluid production in real time and volumes in multiple-component complex fluids production lines that uses an apparatus comprising a magnetic resonance sensor module, a pulsed pre-polarization magnetic module of variable length, and a control computer for the acquisition and transfer of data, all of which are mutually associated;

• wherein, the magnetic resonance sensor module comprises:
• a device configured to generate a constant and homogeneous magnetic field;
• a radio-frequency exciting/receiving antenna;
• a radio-frequency electronic module for magnetic resonance;
• and
• a magnetic resonance digital module;
• wherein, the radio-frequency electronic module comprises:
• a transmitter Tx, with a plurality of filters, impedance adaptation and blanking circuits;
• a merit factor Q control circuit;
• a receiver Rx, with a plurality of receiving channels and a plurality of filters, impedance adaptation and blanking circuits;
• and
• a plurality of transmission/reception keys;
• and
• wherein, each of said different multiple-component complex fluid production lines bears one of said sensor assemblies.

An arrangement configured for the sequential measurement of flow-rate and cut of a complex fluid production in real time and volumes in multiple-component complex fluids production lines that uses, an apparatus comprising a magnetic resonance sensor module, a pulsed pre-polarization magnetic module of variable length, and a control computer for the acquisition and transfer of data, all of which are mutually associated;

• wherein, the magnetic resonance sensor module comprises:
• a device configured to generate a constant and homogeneous magnetic field;
• a radio-frequency exciting/receiving antenna;
• a radio-frequency electronic module for magnetic resonance;
• and
• a magnetic resonance digital module;
• wherein, the radio-frequency electronic module comprises:
• a transmitter Tx, with a plurality of filters, impedance adaptation and blanking circuits;
• a merit factor Q control circuit;
• a receiver Rx, with a plurality of receiving channels and a plurality of filters, impedance adaptation and blanking circuits;
• and
• a plurality of transmission/reception keys;
• and
• wherein, a single sensor assembly is fixedly mounted on said auxiliary line which is connected to a group onto which the various production lines of complex fluid converge and a selection key is activated in order to direct production of each production line onto said auxiliary line.

A method of directly measuring in real time and flow-rates of the proportion and flow-rate of different components which form a multiple-component complex fluid, using an apparatus comprising a magnetic resonance sensor module, a pulsed pre-polarization magnetic module of variable length, and a control computer for the acquisition and transfer of data, all of which are mutually associated;

• wherein, the magnetic resonance sensor module comprises:
• a device configured to generate a constant and homogeneous magnetic field;
• a radio-frequency exciting/receiving antenna;
• a radio-frequency electronic module for magnetic resonance;
• and
• a magnetic resonance digital module;
• wherein, the radio-frequency electronic module comprises:
• a transmitter Tx, with a plurality of filters, impedance adaptation and blanking circuits;
• a merit factor Q control circuit;
• a receiver Rx with a plurality of receiving channels and a plurality of filters, impedance adaptation and blanking circuits;
• and
• a plurality of transmission/reception keys;
• said method comprising the following steps:
• a. activating a first segment of the pre-polarization magnetic field in order to pre-polarize resonant nuclei of said multiple-component complex fluid during a time adequate regarding a spin-lattice relaxation time T1 of said first selected component in order to establish proportion and flow-rate thereof;
• b. transmitting radio-frequency pulses through a transmitter Tx included in said radio-frequency electronic module, according to the CPMG pulses sequence;
• c. emitting said radio-frequency pulses from said radio-frequency electronic module towards said magnetic resonance sensor module in order to excite said resonant nuclei of said complex fluid and generate a magnetic resonance signal (NMR) as a response to said emitted radio-frequency pulses;
• d. receiving response signals at said sensor module;
• e. emitting said signals in said sensor assembly, through said receiver Rx, included in said radio-frequency electronic module;
• f. digitalizing said response signals received by an analog/digital converter which is included in said magnetic resonance digital module;
• g. sending said digitalized signals to said control computer;
• h. activating a second segment of said pre-polarization magnetic field in order to pre-polarize said resonant nuclei of said multiple-component complex fluid during a time appropriate as regards the value of said second shorter spin-lattice relaxation time T1 of said selected second component for the determination of said second component proportion and flow-rate;
• i. repeating steps b) to h) in order to obtain adequate signals for further mathematical analysis in order to obtain relative proportions and flow-rates of each of the different components of said complex fluid;
• j. activating a third segment of said pre-polarization magnetic field in order to pre-polarize said resonant nuclei of said multiple-component complex fluid during a time appropriate as regards the value of said third shorter spin-lattice relaxation time T1 of said selected third component for the determination of said third component proportion and flow-rate;
• k. repeating steps b) to j) in order to obtain adequate signals for further mathematical analysis in order to obtain relative proportions and flow-rates of each of the different components of said complex fluid;
• l. repeating steps b) to k) until all of the measurable components are measured;
• and
• m. processing the obtained resonance signals in order to directly measure in real time and flow rates the proportion and flow-rate of each of the components of the complex fluid and presenting values indicative in real time and flow rates the proportion and flow-rate of each of the components of the complex fluid to a user of the apparatus.