Method for producing oil by changing bottom water reservoir oil well into water dumping well and oil production well system

Abstract

The invention discloses a method for producing oil by changing a bottom water reservoir oil well into a water dumping well and an oil production well system. In the oil production method, a well is digged on a strong bottom water reservoir; the depletion development is carried out; and when bottom water is broken through to the oil well, an oil layer and a water layer below the oil layer are drilled out to guide the bottom water to the oil layer to carry out oil displacement, so that crude oil is produced from other wells. According to the invention, the oil well which is seriously flooded is subjected to secondary well drilling, the oil layer is communicated with the water layer, the bottom water energy is sufficiently utilized, the bottom water is guided into the oil layer to carry out oil displacement and the crude oil is produced from the adjacent wells. The invention not only solves the problems caused by a water cone, but also sufficiently utilizes the natural energy of the bottom water, guides the bottom water to the oil layer to displace the crude oil and improves the recovery ratio of the crude oil.

Description

technical field [0001] The invention relates to an oil production method and an oil production well system, in particular to an oil production method and an oil production well system for converting an oil well in a bottom water reservoir into an artesian water injection well. Background technique [0002] In the middle and late stages of bottom water reservoir production, water breakthrough will inevitably occur in oil wells. If reasonable and effective water control measures are not taken, production will decline rapidly, recovery will decline, and the development effect will deteriorate. The most common phenomenon in bottom water reservoirs is the problem of bottom water coning. Bottom water coning means that in a reservoir with bottom water, before the reservoir is developed, the water is located in the lower part of the reservoir, and the oil is located in the upper part of the reservoir. If a production well is drilled in the oil-bearing part for oil production, a hemi...

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Problems solved by technology

[0003] For reservoirs with strong bottom water, especially when the bottom water is abnormally high pressure, water cones are easy to form during the production process. Once the bottom water breaks through to the bottom of the well, measures to shut down the well or shut off water are often taken, but shutting down the well will lead to oilfield production. decline, and water blocking will cost a lot of operating costs

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