Abstract: The invention discloses a method for experimentally determining the conductivity of an unpropped fracture in hydraulic fracturing of a shale reservoir, comprising: select an outcrop sample with a natural fracture in the shale reservoir, and cut the outcrop sample with along the extension direction of the natural fracture into no less than eight square rock slabs; use a laser scanner to obtain the rough topography data of the fracture surface of each square rock slab and calculate the area tortuosity; pick out the rock samples; model the rough surface of the selected rock samples; import the treated surface model into the engraving machine, and select the downhole core or outcrop rocks in the same horizon for repeated production; calculate the shear slippage at different positions of unpropped fracture according to the data of the shale reservoir; finally test the conductivity of the shale rock samples after shear slip.

Abstract: The invention discloses a method for experimentally determining the conductivity of unpropped fracture in hydraulic fracturing of shale reservoir, comprising the following steps: select an outcrop sample with natural fractures in a shale reservoir section, and cut the outcrop sample with natural fractures along the extension direction of the natural fracture into no less than 8 square rock slabs; use a laser scanner to obtain the rough topography data of the fracture surface of each square rock slab and calculate the area tortuosity; pick out the rock samples; model the rough surface of the selected rock samples; import the treated surface model into the engraving machine, and select the downhole core or outcrop rocks in the same horizon for repeated production; calculate the shear slippage at different positions of unpropped fracture according to the data of shale reservoir; finally test the conductivity of the shale rock samples after shear slip.

Abstract: A method performed by a processor allows an individual to update or maintain a database including a core and an extension. The core contains core tables including general data and the extension contains extension tables including specific data. The core tables and the extension tables have the same primary keys and the specific data are an extension of the general data. The method includes receiving an input from the individual for modifying the database, modifying the core using the received input, and automatically modifying the extension to reflect the modifying of the core.

Abstract: A method performed by a processor allows an individual to update or maintain a database including a core and an extension. The core contains core tables including general data and the extension contains extension tables including specific data. The core tables and the extension tables have the same primary keys and the specific data are an extension of the general data. The method includes receiving an input from the individual for modifying the database, modifying the core using the received input, and automatically modifying the extension to reflect the modifying of the core.

Abstract: A method performed by a processor allows an individual to update or maintain a database including a core and an extension. The core contains core tables including general data and the extension contains extension tables including specific data. The core tables and the extension tables have the same primary keys and the specific data are an extension of the general data. The method includes receiving an input from the individual for modifying the database, modifying the core using the received input, and automatically modifying the extension to reflect the modifying of the core.

Abstract: A method for updating a benefit program with a plurality of plans receives an input from an individual indicating a change to the benefit program, and updates the benefit program and the salary information of the individual consistent with the input. The individual is presented with a summary of the updated benefit program and the updated salary information, and can indicate additional changes to the benefit plan immediately after the summary presented to the individual.

Abstract: A method performed by a processor allows an individual to update or maintain a database including a core and an extension. The core contains core tables including general data and the extension contains extension tables including specific data. The core tables and the extension tables have the same primary keys and the specific data are an extension of the general data. The method includes receiving an input from the individual for modifying the database, modifying the core using the received input, and automatically modifying the extension to reflect the modifying of the core.