Method and device for predicting well control reserves of heterogeneous buried hill gas reservoir

Abstract

The invention discloses a heterogeneous buried hill gas reservoir well control reserve prediction method and device.The method comprises the steps that a gas reservoir is divided into N seepage areas in the radial direction of a borehole according to the heterogeneous condition, the N seepage areas are distributed in a concentric annulus mode, and basic parameters of the N seepage areas are obtained; a pressure propagation equation of the gas reservoir from the concentric circle center in the radial direction is established, and the gas reservoir well control radius is obtained through the pressure propagation equation; and well control reserves are predicted by using the gas reservoir well control radius. The method can consider the characteristics of heterogeneous distribution of buried hill gas reservoirs, is more consistent with the actual situation, and achieves the accurate prediction of well control reserves.

Description

technical field [0001] The invention relates to oil and gas field development technology, in particular to a method and device for predicting well-controlled reserves of heterogeneous buried-hill gas reservoirs. Background technique [0002] In recent years, buried hill oil and gas reservoirs have become an important exploration and development field for domestic and foreign petroleum geological fields to find new oil and gas fields, and buried hill oil and gas reservoirs have gradually become the most potential reserves and production replacement areas of CNOOC in China. In the process of oil and gas field development, well-controlled reserves are an important parameter in development design, but the calculation of well-controlled reserves in the prior art assumes that the reservoirs are homogeneously distributed, and does not consider the characteristics of heterogeneous distribution of reservoirs. [0003] Therefore, in view of the heterogeneous distribution characteristi...

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Problems solved by technology

In the process of oil and gas field development, well-controlled reserves are an important parameter in development design, but the calculation of well-controlled reserves in the prior art assumes that the reservoirs are homogeneously distributed, and does not consider the characteristics of heterogeneous distribution of reservoirs

[0003] Therefore, in view of the heterogeneous distribution characteristics of buried hill gas reservoirs, the well-controlled reserves prediction method in the prior art can no longer meet the needs of development, so it is urgent to conduct research on the well-controlled reserves of heterogeneous gas reservoirs

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