A well pattern optimization method for tight sandstone gas reservoir development

Abstract

The invention provides a tight sandstone gas reservoir development well pattern optimization method and belongs to the technical field of effective maximum natural gas extraction and geological and gas reservoir engineering and mineral field experiments. The method comprises the following steps: collecting drilling data in a dense area, finely dissecting an effective sand body and determining the length and width of the effective sand body; establishing a no-interference gas well change rule on the basis that the collection production time is long and the fact that well interference does not exist in actual production data of a gas well is proved; determining that a gas-well production interference change rule exists by adopting a numerical simulation technique and on the basis of establishment of a fine geological model; realizing production forecast of two types of gas wells, and establishing a development well pattern optimization model by using gas reservoir development profits as a reference, so as to determine economic limit well pattern density and economic optimum well pattern density of a gas reservoir; establishing a relationship between a gas reservoir recovery ratio and the well pattern density; and determining a reasonable development well pattern for the gas reservoir by comprehensively considering geological requirements, economic conditions and highest recovery ratio expectation, so as to realize optimization of the tight sandstone gas reservoir development well pattern.

Description

technical field [0001] The invention relates to a well pattern optimization method for tight sandstone gas reservoir development, which belongs to the field of effective maximum exploitation of natural gas and integrates the technical fields of geology, gas reservoir engineering and mine field test. Background technique [0002] The development of well pattern is a key technical countermeasure to improve the recovery of tight and strongly heterogeneous sandstone gas reservoirs, and it is a technical problem that has troubled researchers for many years. [0003] Due to the easy flow of natural gas and the low requirements of conventional gas reservoirs on development well patterns, scholars at home and abroad have not paid enough attention to the research on gas reservoir development well patterns for a long time. Compared with reservoir development well pattern research is far behind, especially for tight and strongly heterogeneous sandstone gas reservoirs, few scholars at h...

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Problems solved by technology

[0005] Existing methods cannot effectively solve the above technical bottlenecks, let alone combine multidisciplinary technologies, so there are great limitations and uncertainties, and it is difficult to obtain reliable results

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