Abstract: The present disclosure relates to a method and system for predicting the production of a fractured horizontal well in a shale gas reservoir, and relates to the technical field of fractured horizontal wells. Considering the different diffusion modes of the matrix in different zones, the present disclosure uses Fick's First Law to describe the pseudo-steady-state diffusion of the matrix in the fracture network zone, Fick's Second Law to describe the unsteady-state diffusion of the matrix in the pure matrix zone, and Darcy's Law to describe the seepage in the fracture network. The present disclosure predicts the production of the fractured horizontal well in the shale gas reservoir under the conditions of matrix-microfracture coupling and hydraulically created fracture-microfracture coupling. The present disclosure improves the prediction accuracy of shale gas well production, and more accurately describes the actual flow law of the shale gas reservoir.

Abstract: The invention discloses a natural gas diffusion coefficient measurement auxiliary device based on a hand-operated lifting device, comprising a core chamber, a bracket, a core preservation device, and a hand-operated lifting device; the left side of the core chamber is connected with a methane measuring chamber, and the right side of the core chamber is connected with a nitrogen measuring chamber; a rotatable bracket is installed on the lower left side of the core chamber, and the lower right side of the core chamber is connected with the hand-operated lifting device; the core chamber is rotated by the hand-operated lifting device with the support as the center; a horizontal platform at the lower part of the core chamber is provided with a revolving door that can accommodate the left end of the core chamber; a core preservation device is installed at the lower part of the revolving door.

Abstract: The present invention provides a shale gas well dynamic production allocating method.

Abstract: The disclosure provides a weighing structure and adsorbed gas measuring equipment, and belongs to the field of gas detection. The weighing structure comprises a mounting plate connected with a balance, a plurality of mounting rings and lifting devices, a plurality of mounting holes are formed in the mounting plate, and the upper portions of the mounting rings pass through the mounting holes; the lower portions of the mounting rings are provided with suspension wires for hoisting mounted objects, the mounting holes are in clearance fit with the mounting rings, and the lifting devices provide upward supporting force for the mounting rings. The measuring equipment further comprises a kettle body, and a cavity for accommodating the weighing structure and a support for supporting the balance are arranged in the kettle body, wherein weights or a sample cylinder are/is arranged at the lower ends of the suspension wires, and a heating layer and a gas injection nozzle are arranged outside the kettle body.

Abstract: An experimental device for carbon dioxide imbition, diffusion and oil discharge in a tight oil reservoir includes: a multistage rock core holder connected with a confining pressure pump and including a pair of connecting holes arranged at an upper end and a lower end thereof with an oil filler pipe connecting therebetween, a crude oil injection device and a recovery device respectively connected to the upper and lower ends, an intermediate container connected to both a high-pressure cylinder and an injection pump, a return pressure pump, a collection device and a control system. A plurality of rows of openings is arranged at a side of the multistage rock core holder to act as a gas inlet connected with the intermediate container via a pipeline, and a gas outlet connected with the recovery device; heating layers are arranged at inner walls of the multistage rock core holder and the intermediate container.

Abstract: The present invention discloses a new experimental device for measuring a diffusion coefficient of natural gas, mainly including a new core holder, a differential pressure sensor, pressure gauges, multiport valves, a confining pressure pump, a vacuum pump, a hydrocarbon gas source, a nitrogen gas source, a gas chromatograph, an intermediate container, sample chambers, a pressure stabilizing device, and pressure-sensitive alarm devices. A rubber sleeve of the new core holder can prevent a core from being stuck in the holder during core replacement due to an improper operation. The configured pressure stabilizing device is connected to the sample chambers, to ensure stable internal pressure in the chambers after sampling. In this way, one experimental variable is omitted, and an experimental result is more accurate and reliable. If gas leakage occurs. A sensor device can sense the gas leakage in time and sends an alarm to a mobile device of an experimenter.