A production monitoring system comprises a plurality of production and injection wells coupled in operation to sensors for measuring physical processes occurring in operation in the production and injection wells and generating corresponding measurement signals for computing software. The computing hardware is operable to execute software products to analyze said measurement signals to abstract a parameter representation of said measurement signals, and to apply said parameters to estimate at least one parametric model of said plurality of injection and production wells, and to employ one of these models for monitoring the system.

A method of attenuating annular pressure buildup within a wellbore. The method includes running first and second strings of casing into a wellbore, wherein the first string of casing surrounds an upper portion of the second string of casing forming an annular region. The method also includes providing a packing of compressible material within the annular region. The compressible material comprises carbonaceous particles. The particles may reside within a porous sleeve or filter, or they may be packed together in a matrix using a cross-linked polymer or binder. The packing is fixed at a selected depth within the annular region, and is designed so that the compressible material absorbs pressure in response to thermal expansion of wellbore fluids during the production of hydrocarbon fluids from the wellbore. The method further includes placing a wellhead over the wellbore, thereby forming a trapped annulus in the wellbore over the annular region.

The present invention is a method of simulating fluid flows in an underground formation comprising a fracture network. A porosity model is constructed, comprising a first medium representative of an unfractured matrix, a second medium representative of fractures oriented in a first direction and a third medium representative of fractures oriented in a second direction orthogonal to the first direction. From at least the porosity model, flow parameters of a grid representation of the formation are determined, which include conduction and convection transmissibilities between two neighboring cells for the second and third media, as well as mass and energy exchanges by convection and conduction between each medium taken two by two for a single cell. Flows in the formation are simulated by f a flow simulator implementing the porosity model.

A carbon-based gas extraction and storage system is described that includes a coal bed methane (CBM) energy production facility. A first well includes a first pump configured operate in an extraction mode in which methane from the CBM chamber is pumped from a CBM chamber, and convertible to an insertion mode in which CO2 is pumped into the CBM chamber. The second well extracts CBM from the CBM chamber. A controller controls the first pump to operate in the extraction mode and controllably switch to the insertion mode in which CO2 emissions from CBM processed by the CBM energy production facility are injected in the CBM chamber. Thus, first pump injects the CO2 emissions into the CBM chamber to assist in extraction of CBM and to permanently store the CO2 in the CBM chamber.

The invention presents a methodology for evaluating the drainage efficiency of the proposed drainage mesh, by identifying poorly drained regions for mesh optimization and/or implementation of complementary projects, in addition to qualitatively evaluating the drainage effect of a field with different number of wells and units and, finally, comparatively evaluating the drainage quality from different reservoirs, thus observing opportunities for optimizing production management, such as activating different intelligent completion valves, for example. To achieve this objective, it applies a set of filters to the mobile HPHISO map in order to identify the regions that have the greatest potential to be explored and that will bring greater recovery gains for a given oil field.

A geothermal reservoir induces gasification and water gas shift reactions to generate hydrogen. The hydrogen or protons are produced to surface by using hydrogen-only or proton-only membranes in production wells. Energy from the reservoir is produced to surface as protons or hydrogen.

A biocide blend can be used in an oil or gas operation. The biocide blend can include a first biocide of a formaldehyde-releasing biocide and a second biocide of a quaternary ammonium compound. The formaldehyde-releasing biocide can release formaldehyde after introduction into a wellbore. The first and second biocide can possess at least one property that is the same. The first biocide and/or the second biocide can maintain biocidal activity for extended periods of time in high salinity wellbore fluids, be thermally stable, and less expensive than other biocides.

A biocide blend can be used in an oil or gas operation. The biocide blend can include a first biocide of a formaldehyde-releasing biocide and a second biocide of a quaternary ammonium compound. The formaldehyde-releasing biocide can release formaldehyde after introduction into a wellbore. The first and second biocide can possess at least one property that is the same. The first biocide and/or the second biocide can maintain biocidal activity for extended periods of time in high salinity wellbore fluids, be thermally stable, and less expensive than other biocides.

A perforating gun with one or more centralizing charge tube inserts and, optionally, an orienting centralizer, used in oil and gas completions operations. A gun string including the perforating gun and one or more additional perforating guns substantially identical to the perforating gun.

A perforating gun with one or more centralizing charge tube inserts and, optionally, an orienting centralizer, used in oil and gas completions operations. A gun string including the perforating gun and one or more additional perforating guns substantially identical to the perforating gun.