Discrete layout movable steam injection device and steam injection process thereof

Abstract

The invention discloses a discrete layout movable steam injection device and a steam injection process thereof. The discrete layout movable steam injection device are used for steam injection of a plurality of oil production wellheads distributed in each area of an oil field, and the multiple oil production wellheads communicate to an underground oil layer through a Christmas tree and an underground oil pipe. The discrete layout movable steam injection device comprises a movable boiler, a movable pipeline, a plurality of steam thin pipelines, a plurality of water, electricity and gas stations and water, electricity and gas thin pipelines, wherein one end of the movable pipeline can be quickly and detachably connected with the movable boiler; one end of each steam thin pipeline is connected with one oil production wellhead, and the other end of each steam thin pipeline can be quickly and detachably connected with the other end of the movable pipeline; the multiple water, electricity and gas stations are distributed in all areas of the oil field, and each water, electricity and gas station comprises a water interface, an electricity interface and a gas interface at fixed positions; the water, electricity and gas thin pipelines are arranged at all the water, electricity and gas stations, and the movable boiler is connected with water, electricity and gas interfaces at the fixed positions of the water, electricity and gas stations through the water, electricity and gas thin pipelines. Nearby steam injection can be achieved, the length of a steam injection pipeline is shortened, and heat loss is reduced.

Description

technical field [0001] The invention relates to the field of oil recovery in oil fields, in particular to a discrete layout movable steam injection device and a steam injection method. Background technique [0002] The steam injection process is often used in the production of heavy oil. By injecting high-temperature steam into the oil layer, the viscosity of the heavy oil is reduced, and the crude oil is easy to be recovered. [0003] The current oilfield technical situation is as follows: [0004] In the steam injection process, the steam equipment mainly consists of 70-ton fluidized beds and 23-ton coal-fired gas boilers, and each fixed boiler 101 has fixed pipelines radially connected to the surrounding oil production wellheads 104 . [0005] Such as figure 1 As shown, the steam injection device 10 with discrete layout in the prior art generally mainly generates steam from the fixed boiler 101, and the steam is sent to each oil production wellhead through the main pipe...

AI Technical Summary

Problems solved by technology

The supporting steam injection pipeline network is long, large in diameter and high in investment;

[0008] 2. Limited by the steam supply radius, the effective operation rate of fixed boilers in some oilfields is only about 40%, and most of the hundreds of boilers cannot operate effectively; equipment maintenance and depreciation costs are high

[0009] 3. In the steam injection pipeline, the steam injection radius of a single well is about 1000 meters, and the heat loss is serious; the overall efficiency is reduced

[0010] 4. General steam injection, the distance between a single well and the boiler is different, and the steam measurement is difficult, so a fixed metering device 105 is used (see Figure 4 ) cannot finely manage and compare the oil-gas ratio of a single well

[0011] 5. The oil-gas ratio data is inaccurate, hindering the implementation of refined management

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