Quantitative evaluation method for quantity of potential resources around developed oil field

Abstract

The invention relates to a quantitative evaluation method for the quantity of potential resources around a developed oil field, wherein the method comprises the following steps: a, analyzing the development rule of a reservoir around the developed oil field based on a high-resolution sequence stratigraphy evolution rule, and locking a favorable reservoir development position; b, searching for a seismic reflection interface corresponding to a medium-term cycle reference surface adjacent to the favorable reservoir development position depth, carrying out horizon interpretation, searching for potential sand bodies, and numbering the potential sand bodies; c, carrying out multi-factor analysis on the potential sand bodies, evaluating each potential sand body, and defining a potential reserve unit; and d, determining reserve calculation parameters of the potential reserve unit, and calculating the reserve of the potential sand bodies. The method can be widely applied to potential sand bodyreserve calculation of developed surrounding oil fields of offshore oil fields, and further exploration and development of the offshore oil fields are facilitated.

Description

technical field [0001] The invention relates to a quantitative evaluation method for potential resources around developed oil fields, belonging to the technical field of oil and gas field development. Background technique [0002] After years of development, offshore oil fields have gradually entered the "double high" development stage of high recovery and high water content, making it increasingly difficult to stabilize production. At the same time, with the continuous improvement of the degree of exploration, the difficulty of discovering new oil fields is increasing. In view of the fact that the periphery of the developed oilfield and the main area of ​​the oilfield generally have similar accumulation conditions, it has a certain accumulation potential and is a favorable replacement area for the developed block. Therefore, based on the structural interpretation of the target oilfield and the conditions of reserve assessment and prediction, it is necessary to consider the...

AI Technical Summary

Problems solved by technology

[0003]Currently, most of the developed oilfields in the Bohai Sea are facing the problem that there is little surrounding data and the potential reserves are difficult to quantify, especially for potential sand bodies in surrounding oilfields with no or few wells , how to quantify the reserves calculation parameters such as oil-bearing area, effective thickness, effective porosity, oil saturation, and volume coefficient of the potential sand body in the reserve calculation. At present, a set of quantitative evaluation methods for the potential resources around the developed oilfields have not yet been formed.

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