Method for determining physical properties and crack characteristic parameters of oil and gas reservoirs with layered fracturing and commingling production

Abstract

The invention discloses a method for determining physical properties and crack characteristic parameters of oil and gas reservoirs with layered fracturing and commingling production. The method comprises the following steps of selecting a well with layered fracturing and commingling production as a target well, collecting and sorting basic information of the well and carrying out a shut-in pressure recovery test on the well; according to a weight coefficient determined by the product of the effective thickness of each small layer and the adding amount of sand, carrying out small-layer splitting on the commingling production output of the well; selecting common business well test software, reading pressure recovery test data and drawing a double logarithmic curve of actually measured pressure and pressure derivatives; selecting a fractured well test interpretation model to carry out well test fitting interpretation on each small layer and obtaining the characteristic parameters of eachsmall layer. The method can accurately obtain the physical properties of the small layer reservoirs and the artificial crack characteristic parameters of the well with layered fracturing and commingling production and can provide a data support for efficient development and the like of the oil and gas reservoirs.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas development, in particular to a method for determining reservoir physical properties and fracture characteristic parameters of layered fracturing multilayer oil and gas reservoirs. Background technique [0002] With the rapid development of the national economy and the continuous acceleration of urbanization, my country's demand for energy is increasing day by day. As a pillar of energy, the oil and gas industry is related to the economic lifeline of the country, and it is of great significance to carry out research on related technologies for oil and gas exploration and development. [0003] In recent years, with the deepening of oil and gas development, the proportion of unconventional oil and gas reservoirs is increasing. Most unconventional oil and gas reservoirs in my country have the characteristics of multi-layer intervals, especially some low permeability, ultra-low permeability a...

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Problems solved by technology

[0008] The layered testing process is complex, time-consuming, and the wells are switched on and off many times, resulting in high operating costs

For the exploration wells and gas test wells in the initial stage of exploration, since the gas transmission pipelines have not been arranged on the ground, the released gas needs to be processed by means of wellhead metering and combustion. The amount of gas released for a single test will cause more serious waste of resources and air pollution

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