Abstract: A technique facilitates a perforation operation. A perforating gun carrier is combined with a pressure enhancement mechanism. The pressure enhancement mechanism provides a controlled increase in pressure within the perforating gun carrier as the perforating gun carrier is delivered into a higher pressure environment. The increase in internal pressure counters the buildup of a pressure differential to the degree desired for a given perforating gun carrier.

Abstract: A charge assembly for incorporation into a downhole tool to induce pressure at an interior of the tool during a downhole application. The assembly includes a reactive powder metals that is particularly configured of a reaction rate slower than that of a high energy explosive directed at the application. Thus, upon triggering of the explosive and downhole application in a high pressure well environment, reaction of the powder metals may serve to substantially reduce any pressure differential at the tool. As such, shock related damage due to sudden introduction of pressure differential wave to the tool may be minimized.

Abstract: A perforating system is disclosed having a perforating gun containing a plurality of radially-oriented shaped charges disposed along the longitudinal axis of the gun. Each charge, when detonated, produce a jet whose penetration velocity exceeds the acoustic velocity of the formation (i.e., target) material to be perforated. A method of operating such a perforating system is also provided, as is a shaped charge having the described characteristics.

Abstract: A technique facilitates a perforation operation. A perforating gun carrier is combined with a pressure enhancement mechanism. The pressure enhancement mechanism provides a controlled increase in pressure within the perforating gun carrier as the perforating gun carrier is delivered into a higher pressure environment. The increase in internal pressure counters the buildup of a pressure differential to the degree desired for a given perforating gun carrier.

Abstract: A perforating apparatus that is usable with a well includes a shaped charge. The shaped charge includes a case, an explosive and a liner. The liner is adapted to form a perforation jet to form a perforation tunnel and promote an exothermic reaction inside the tunnel to create a pressure wave to force debris from the tunnel.

Abstract: A technique includes determining a stress tensor in a formation that surrounds a wellbore. The stress tensor varies with respect to the wellbore. The technique includes running a perforating charge into the wellbore to perforate the formation and performing at least one of selecting the perforating charge and orienting the perforating charge in the wellbore based at least in part on the determination of the stress tensor.

Abstract: A method for perforating a formation material proximate to a wellbore involving lowering a perforating gun string comprising a perforating gun and a gas-generating device downhole, providing wellbore fluid around the perforating gun, and providing a volume of gas proximate the perforating gun, by the gas-generating device, wherein the volume of gas is configured to reduce the shock produced upon firing of the perforating gun.

Abstract: A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness.

Abstract: A perforating apparatus that is usable with a well includes a shaped charge. The shaped charge includes a case, an explosive and a liner. The liner is adapted to form a perforation jet to form a perforation tunnel and promote an exothermic reaction inside the tunnel to create a pressure wave to force debris from the tunnel.

Abstract: A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness.

Abstract: A transient overbalance condition is created in a wellbore interval such that a pressure of the wellbore interval is greater than a reservoir pressure in surrounding formation. Creating the transient overbalance condition causes a near-wellbore region of the formation to increase in pressure. The pressure in the wellbore interval is reduced at a rate that produces a relative underbalance condition in which the pressure in the wellbore interval is less than the pressure of the near-wellbore region of the formation, but the pressure in the wellbore interval is greater than the reservoir pressure.

Abstract: A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness.

Abstract: A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness.

Abstract: A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness.

Abstract: Methods for estimating an unknown value for a dynamic under-balance condition are herein disclosed. The unknown value may be a well property value, or may be a transient pressure characteristic. Embodiments of the method include selecting at least one transient pressure characteristic and selecting at least one well property value. A correlation between the at least one transient pressure characteristic and at least one well property value is obtained. The unknown value is estimated by applying at least one known transient pressure characteristic or at least one known well property value to the obtained correlation.

Abstract: A perforating gun has a gun carrier extending in a longitudinal direction and a loading tube located within the gun carrier. The loading tube extends in the longitudinal direction and a shape charge is supported by the loading tube. The shape charge has a casing, an explosive, and a liner, the casing opening in a first direction and having a centerline extending in the first direction, the first direction being essentially perpendicular to the longitudinal direction. A liquid implant is located adjacent to the shape charge in the first direction and intersecting the centerline.

Abstract: A perforating gun, having a gun carrier extending in a longitudinal direction; a loading tube located within the gun carrier, the loading tube extending in the longitudinal direction; a shape charge being supported by the loading tube, the shape charge having a casing, an explosive, and a liner, the casing opening in a first direction and having a centerline extending in the first direction, the first direction being essentially perpendicular to the longitudinal direction; and a liquid implant, the liquid implant being located adjacent to the shape charge in the first direction and intersecting the centerline.

Abstract: A transient overbalance condition is created in a wellbore interval such that a pressure of the wellbore interval is greater than a reservoir pressure in surrounding formation. Creating the transient overbalance condition causes a near-wellbore region of the formation to increase in pressure. The pressure in the wellbore interval is reduced at a rate that produces a relative underbalance condition in which the pressure in the wellbore interval is less than the pressure of the near-wellbore region of the formation, but the pressure in the wellbore interval is greater than the reservoir pressure.

Abstract: A well treatment system of the present invention includes a housing forming a sealed surge chamber, and a surge charge disposed within the sealed surge chamber, wherein the surge charge is adapted upon activation to penetrate the housing and to not penetrate material exterior of the housing. Fluid communication is created between the surge chamber and the wellbore when the housing is penetrated by the surge charge. The penetration permits wellbore fluid to flow quickly into the surge chamber. Fluid flow into the surge chamber may enhance a surge of flow from the formation into the wellbore.

Abstract: The present invention provides an apparatus for use in perforating a well having a plurality of explosive charges. Each explosive charge is adapted to generate a perforation tunnel in the formation adjacent to the well. In one embodiment, explosive charges are oriented to create perforation tunnels that converge at a location within the formation in order to create a fracture initiation plane capable of mitigating or avoiding hydraulic fracturing complications.