Complicated fault block oil reservoir development well pattern optimizing design method

Abstract

The invention provides a complicated fault block oil reservoir development well pattern optimizing design method which is based on complicated fault block target area fine geology research and reasonable development layer division. Firstly, structural forms are performed, individual layer blocks are finely classified, the classification is performed according to the oil-bearing area size, then main geologic features and main development characteristics of the similar oil reservoirs are abstracted, and characteristic models of classified and graded complicated fault block oil reservoirs are established. Reasonable well spacing density, injection-production well pattern and injection-production parameter design optimization is carried out through a mathematic and numerical simulation means. Reasonable injection-production well pattern and production parameters of a series of classified and graded complicated fault block oil reservoirs are obtained, and well pattern optimization design of the complicated fault blocks is finished. By adopting the complicated fault block oil reservoir development well pattern optimizing design method, reasonable injection-production well pattern of the complicated fault block oil reservoirs with respective different structural forms in different areas can be quickly confirmed, the reserve utilization and water flooding control degree of the complicated fault block oil reservoirs can be improved, and efficient development of the fault blocks can be achieved.

Description

technical field [0001] The invention relates to the technical field of oil reservoir development, in particular to a method for optimal design of complex fault block oil reservoir development well pattern. Background technique [0002] Development well pattern design is an important task in the preparation of oilfield development plans. For fault block reservoirs, the area is larger than 0.5km 2 For simple fault blocks, conventional area injection-production well patterns or edge water injection can generally be deployed for development, but for oil-bearing areas less than 0.5km 2 1. For complex fault-block reservoirs with various structural forms, it is difficult to form a perfect injection-production well pattern (group) by using a regular area water injection well pattern, and the reserve production degree at the corners is low, which seriously affects the water injection development effect. In the development process of fault-block oilfields, on the one hand, for the de...

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Problems solved by technology

[0002] Development well pattern design is an important task in the preparation of oilfield development plans. For fault block reservoirs, the area is larger than 0.5km 2 For simple fault blocks, conventional area injection-production well patterns or edge water injection can generally be deployed for development, but for oil-bearing areas less than 0.5km 2 For complex fault-block reservoirs with various structural forms, it is difficult to form a perfect injection-production well pattern (group) by using a regular area water injection well pattern, and the reserve production degree at the corners is low, which seriously affects the water injection development effect

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