Sand prevention opportunity determination method for offshore oil and gas field development and production

Abstract

The invention relates to the field of offshore oil-gas field development, in particular to a sand prevention opportunity determination method for offshore oil-gas field development and production, which comprises the following steps: constructing a relation model of rock mechanical parameters of a reservoir along with ground water content, the rock mechanical parameters comprising cohesion and internal friction angle; based on a framework sand production damage model, calculating to obtain a sand production critical production pressure difference under different ground water contents, when the sand production critical production pressure difference is equal to the production pressure difference, starting sand production of the reservoir, and taking the corresponding moment as a sand prevention opportunity; the framework sand production failure model considers the influence of pore pressure failure on ground stress and is constructed based on a Mogi-Coulomb failure criterion and the rock mechanical parameters; according to the sand prevention opportunity determination method for offshore oil-gas field development and production, the optimal sand prevention opportunity for oil-gas field development and production can be scientifically and accurately determined.

Description

technical field [0001] The invention relates to the field of offshore oil and gas field development, in particular to a sand control timing determination method for offshore oil and gas field development and production. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The reservoir sections of offshore oil and gas fields are mostly unconsolidated sandstone, with a low degree of rock cementation, and the formation is easily broken and carried into the wellbore by oil and gas fluids, resulting in sand production. Once the oil well produces sand, it will cause the abrasion of pipelines and production equipment, reduce the production capacity of the oil well, pollute the environment, and even cause the oil well to stop production or be scrapped. Due to the high operating cost of the offshore platform, once the oil well produces sand, it will greatly in...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for determining sand control timing for offshore oil and gas field development and production, so as to solve the technical problem of inaccurate determination of sand control timing for oil and gas field development and production based on experience in the prior art

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