Reservoir reforming method

Abstract

The invention provides a reservoir reforming method. The reservoir reforming method includes the steps that the maximum horizontal principle stress and the minimum horizontal principle stress of a predetermined reservoir are measured; a horizontal well comprising a vertical section and a horizontal section is drilled, wherein the included angle between the track of the horizontal section and the maximum horizontal principle stress or the minimum horizontal principle stress ranges from 30 degrees to 60 degrees; a well completion procedure is executed; the predetermined reservoir is cracked so that a crack can be formed in the predetermined reservoir in the direction of the maximum horizontal stress. At the initial design stage, in consideration of the possible extension direction of the crack when the reservoir is cracked, the included angle between the extension direction of the horizontal section and the maximum horizontal principle stress or the minimum horizontal principle stress of the predetermined reservoir is made to range from 30 degrees to 60 degrees, so that the horizontal well has good experience completeness and a good oil-guiding effect of the crack, and then the oil and gas production rate is easily increased.

Description

technical field [0001] The application relates to the technical field of oil and gas field exploration and development, in particular to a method for reservoir reconstruction. Background technique [0002] Tight sandstone oil is the most conventional type of tight oil, specifically referring to continuous oil accumulation in tight sandstone reservoirs. Tight oil refers to oil produced in low porosity and low permeability rock reservoirs. Tight oil exists in the organic-rich and extremely low-permeability carbonate rock, argillaceous siltstone and sandstone interlayer systems in the state of adsorption and free, forming self-generated and self-storage, continuous distribution of oil accumulation. [0003] Because tight oil and gas resources are different from conventional oil and gas resources, they cannot be exploited by traditional oil and gas extraction methods, and most often require reservoir reconstruction to achieve economical and effective development. When developi...

AI Technical Summary

Problems solved by technology

However, the existing oil and gas wells are not combined with how to fracturing the reservoir during the design process, which makes the subsequent fracturing of tight oil and gas reservoirs less effective and affects the oil and gas recovery rate

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