Method and device for determining oil and gas reserves and water body scale

Abstract

The embodiment of the invention discloses a method and device for determining oil and gas reserves and a water body scale. The method comprises the steps of obtaining a fluid property parameter; determining a storage type of a target area; determining a first mapping relationship according to the fluid property parameter and the storage type of the target area, and determining crude oil reserves and first water body volume according to the first mapping relationship; or determining a second mapping relationship according to the fluid property parameter and the storage type of the target area, and determining natural gas reserves and second water body volume according to the second mapping relationship. According to the method and device for determining the oil and gas reserves and the water body scale provided by the embodiment of the invention, the oil and gas reserves and the water body scale of a carbonate fracture-vug type carbonate rock oil and gas reservoir can be calculated quantitatively.

Description

technical field [0001] This application relates to the technical field of oil and gas reservoir development, in particular to a method and device for determining oil and gas reserves and water body scale. Background technique [0002] The development of fractured-vuggy carbonate reservoirs usually has the following three characteristics: First, the reservoir is complex and has strong heterogeneity. The second is that the fluid is complex, and the properties of oil, gas, and water in space vary greatly and the distribution is irregular. The third is that the production is complicated, the output and pressure change rapidly, and the production cannot be carried out according to the fixed bottom hole pressure or the fixed production at the wellhead. Generally speaking, fracture-vuggy reservoirs have strong heterogeneity, poor connectivity, and limited single well control range, and each well-controlled fracture-vuggy reservoir is a relatively independent reservoir. [0003] A...

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Problems solved by technology

Second, the fluid is complex, and the properties of oil, gas, and water in space vary greatly and the distribution is irregular

Third, the production is complicated, the output and pressure change rapidly, and the production cannot be carried out according to the fixed bottom hole pressure or the fixed production at the wellhead

Generally speaking, fracture-cavity reservoirs have strong heterogeneity, poor connectivity, and limited single well control range, and each well-controlled fracture-cavity reservoir is a relatively independent reservoir.

[0003] At present, there are many dynamic reserve calculation methods for sandstone oil and gas reservoirs at home and abroad. These conventional methods have great limitations for fracture-vuggy oil and gas reservoirs, especially in the presence of water bodies, which cannot accurately calculate oil and gas reserves and water body scale.

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