Device and method for homogeneously injecting composite thermal fluid into multiple wells

Abstract

The invention relates to a device and a method for homogeneously injecting composite thermal fluid into multiple wells. The device mainly comprises a composite thermal fluid generator, a homogenizing flow regulator, well bottom data monitoring systems and a ground data acquisition and control system. The inlet end of the homogenizing flow regulator is connected with the composite thermal fluid generator; the outlet end of the homogenizing flow regulator is connected with the well bottom data monitoring system of each injection well through a gas-liquid separator; each well bottom data monitoring system is mounted at the bottom of the shaft of the corresponding injection well; the ground data acquisition and control system is connected with each well bottom data monitoring system and the homogenizing flow regulator through cables. By utilizing the device provided by the invention, the well bottom conditions of a plurality of injection wells into which the composite thermal fluid is injected simultaneously can be monitored and analyzed through the well bottom data monitoring systems and the ground data acquisition and control system, and the injection conditions of each well are subjected to homogenizing control through the homogenizing flow regulator, so that purposes of performing inter-well uniform injection, improving the utilization rate of the composite thermal fluid, and improving an oil reservoir development effect are achieved.

Description

technical field [0001] The invention relates to a device and method for multi-well homogeneous injection of composite thermal fluid, which belongs to the technical field of petroleum development. Background technique [0002] Heavy oil reservoirs have huge reserves, but they are also difficult to exploit. At present, the method of injecting compound thermal fluid huff and puff is mostly used to increase the temperature of the reservoir, reduce the viscosity of crude oil, and then increase the recovery of crude oil. In the later stage of multiple rounds of huff and puff, as the injection fluid front advances, gas channeling between wells is prone to occur, seriously affecting the normal production of adjacent wells. The simultaneous injection of multiple wells can suppress the occurrence of gas channeling. However, due to the unreasonable ratio of injected fluids between wells, large differences in wellbore conditions, and large differences in reservoir conditions in horizo...

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Problems solved by technology

[0003] Therefore, in the process of multi-well simultaneous injection, there is currently a lack of a control device and adjustment method that can dynamically adjust the ratio of composite thermal fluid injected between wells and the gas-liquid ratio of a single well, which seriously restricts the technology of composite thermal fluid enhanced oil recovery. efficient implementation of

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