Oil and gas well sand control method and device based on geomechanical model

Abstract

The invention provides an oil-gas well sand prevention method and device based on a geomechanical model. The method includes the steps that a calculation model of flowing bottomhole pressure of an oil-gas well is established according to a well surrounding rock stress analysis model of the oil-gas well and a rock failure criterion; geomechanical parameters are calculated according to logging information, wherein the geomechanical parameters comprise maximum horizontal principal stress, minimum horizontal principal stress, tensile strength of well wall rock and reservoir pore pressure; the flowing bottomhole pressure is calculated according to the geo-mechanical parameters and the calculation model of the flowing bottomhole pressure; the critical production pressure difference of the oil-gas well is determined according to the reservoir pore pressure and the flowing bottomhole pressure; the relation between the reservoir pore pressure and the critical production pressure difference in the production process of the oil-gas well is determined according to the logging information, and the actual production pressure difference of the oil-gas well is adjusted according to the relation. The critical production pressure difference of output sand of the oil-gas well is accurately predicted, and therefore effective sand prevention is carried out.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a sand control method and device for oil and gas wells based on a geomechanical model. Background technique [0002] Sand production in oil and gas wells is one of the important problems encountered in oil and gas production, which will lead to wear and corrosion of oil production equipment, instability of oil and gas well boreholes, and a series of hazards such as production reduction or shutdown. Gravel packing, wire-wrapped screens, chemical consolidation, and formation pre-strengthening are used to prevent and control sand production in oil and gas wells. However, factors such as difficulty in observing the sand production process, complex reservoir conditions, and large differences in formation rock mechanical properties make sand production in oil and gas wells difficult. Prevention has become a problem. [0003] Sand production is caused by...

AI Technical Summary

Problems solved by technology

Gravel packing, wire-wrapped screens, chemical consolidation, and formation pre-strengthening are used to prevent and control sand production in oil and gas wells. However, factors such as difficulty in observing the sand production process, complex reservoir conditions, and large differences in formation rock mechanical properties make sand production in oil and gas wells difficult. Prevention becomes a problem

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