Abstract: A method is offered to predict and prevent the event of fracture hit (direct fluid communication) between a parent well and a child (active) well. The growth of a child well creates 3D stress field in the vicinity of a parent well. The growth of a child well is simulated using the geomechanic-transport model. A model of interaction between the child well and parent well is provided. The simulations for different job designs create a set of pressure scenario in the parent both for the cases with and without fracture hit (fracture hit catalogue). Comparison (matching) of actual pressure data in the parent and child well with the pre-calculated pressure scenarios indicate the risk of fracture development with a fracture hit, which means a stop in fracturing stimulation.

Abstract: A method is offered to predict and prevent the event of fracture hit (direct fluid communication) between a parent well and a child (active) well. The growth of a child well creates 3D stress field in the vicinity of a parent well. The growth of a child well is simulated using the geomechanic-transport model. A model of interaction between the child well and parent well is provided. The simulations for different job designs create a set of pressure scenario in the parent both for the cases with and without fracture hit (fracture hit catalogue). Comparison (matching) of actual pressure data in the parent and child well with the pre-calculated pressure scenarios indicate the risk of fracture development with a fracture hit, which means a stop in fracturing stimulation.

Abstract: Disclosed herein are systems and methods for providing percentile-based alerts from historical event-occurrence data. An embodiment of a method includes identifying a baseline result of an aggregation operation performed with respect to a detection set of attributes of event records. Each baseline result corresponds to a baseline set of one or more event records from a baseline time period within a baseline time window. The method includes determining a subject result of the aggregation operation performed with respect to the detection set of attributes of a subject set of the event records corresponding to a subject time period. The method includes determining, based on the baseline result and the subject result, whether the subject result indicates an alert condition for the detection set for the subject time period, and if so then outputting one or more alerts.

Abstract: Disclosed herein are systems and methods for providing percentile-based alerts from historical event-occurrence data. An embodiment of a method includes identifying a baseline result of an aggregation operation performed with respect to a detection set of attributes of event records. Each baseline result corresponds to a baseline set of one or more event records from a baseline time period within a baseline time window. The method includes determining a subject result of the aggregation operation performed with respect to the detection set of attributes of a subject set of the event records corresponding to a subject time period. The method includes determining, based on the baseline result and the subject result, whether the subject result indicates an alert condition for the detection set for the subject time period, and if so then outputting one or more alerts.

Abstract: A treatment fluid made of mineral acid, viscoelastic surfactant, at least one of a fluoride source and a chelant, and optionally a corrosion inhibitor. A method of combining a mineral acid, viscoelastic surfactant, at least one of a fluoride source and a chelant, and optionally a corrosion inhibitor, in a fluid mixture. A method of contacting a low-temperature formation with a fluid mixture of mineral acid, viscoelastic surfactant, at least one of a fluoride source and a chelant, and optionally a corrosion inhibitor.

Abstract: A method and system for recovering data written onto a storage device when system failure and/or damage occur during use is provided. A memory of the storage device is divided into a plurality of information zones, for storing data as a codeword set, and a plurality of check zones, for storing checksums, of equal size selected from different parts of the storage device. A computing unit calculates etalon checksums with an established formula during each write data operation for each codeword set in the information zones. If failure, damage or data corruption occurs, computing unit calculates current checksums using an established formula. The values of the stored etalon checksums and the current checksums are used for data recovery, which is performed by solving the system of equations, received from the formula for computing the checksums. Parallel calculation schemes are used in checksum computing and for data recovery.

Abstract: A method for treating a subterranean formation penetrated by a wellbore is provided. The method includes providing a treatment fluid containing a viscoelastic surfactant having at least one degradable linkage, a hydrolysable material, and a pH control material, and injecting the treatment fluid into a subterranean formation. The pH control material may have a pH equal or greater than about 9 and may include a strongly alkaline material and an oxidizing agent.

Abstract: A treatment fluid made of mineral acid, viscoelastic surfactant, at least one of a fluoride source and a chelant, and optionally a corrosion inhibitor. A method of combining a mineral acid, viscoelastic surfactant, at least one of a fluoride source and a chelant, and optionally a corrosion inhibitor, in a fluid mixture. A method of contacting a low-temperature formation with a fluid mixture of mineral acid, viscoelastic surfactant, at least one of a fluoride source and a chelant, and optionally a corrosion inhibitor.

Abstract: An embodiment of a downhole method of breaking of a well treatment fluid relates to overcrosslinking a polymeric thickener with an overcrosslinking agent such as an excess crosslinking agent and/or an excess alkaline material, wherein either or both the agent and/or material may be encapsulated.

Abstract: A method is for treating a subterranean formation penetrated by a wellbore is given which comprises providing a treatment fluid comprising a viscoelastic surfactant having at least one degradable linkage, a hydrolysable material, and a pH control material, wherein the pH control material has a pH equal or greater than about 9 and comprises a strongly alkaline material and an oxidizing agent; and injecting into the subterranean formation the treatment fluid.

Abstract: An embodiment of a downhole method of breaking of a well treatment fluid relates to overcrosslinking a polymeric thickener with an overcrosslinking agent such as an excess crosslinking agent and/or an excess alkaline material, wherein either or both the agent and/or material may be encapsulated.