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Ground testing and adjusting device for separate injection of CO2 by double pipes and application method thereof

A ground and pipeline technology, applied in the field of double-pipe CO2 injection ground measurement and adjustment device, to achieve the effects of small erosion damage, long-term accuracy, and multiple stages

Pending Publication Date: 2019-08-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] In order to solve the above technical problems, a double-pipe injection CO 2 The ground measurement and adjustment device and its use method solve the problems of gas injection and pressure regulation and prevention of ice blockage

Method used

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  • Ground testing and adjusting device for separate injection of CO2 by double pipes and application method thereof
  • Ground testing and adjusting device for separate injection of CO2 by double pipes and application method thereof
  • Ground testing and adjusting device for separate injection of CO2 by double pipes and application method thereof

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Embodiment Construction

[0035] See figure 1 As shown, double-pipe injection of CO 2 The ground measurement and adjustment device, the tee 11 is respectively connected to the main pipeline 1, the sub-pipeline 1 6 and the sub-pipeline 2 12, the main pipeline is connected to the valve 2, the flow meter 4 and the pressure gauge 5, and the sub-pipeline 1 and the sub-pipeline 2 are connected to the valve And flowmeter, adjustable pressure reducer 9, differential pressure gauge 8, thermometer 7 and vent valve 10 are also installed on branch line one and branch line two, and thermometer 7 is installed after adjustable pressure reducer 9. This device is configured for CO 2 The pipeline pressure is high, so it is necessary to depressurize in two ways and then inject gas. In order to facilitate disassembly and assembly, as shown in the figure, a needle valve 13 is generally installed between the pressure gauge and the pipeline. Since the differential pressure gauge has two pressure pipelines connected before ...

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Abstract

The invention relates to the technical field of gas injection in oilfield development and is applied to separate injection of CO2. According to the device provided by the invention, a tee of the device is separately connected to a general pipeline and two branch pipelines, the general pipeline is connected to a valve, a flowmeter and a pressure meter, and an adjustable pressure reducer, a differential gage, a thermometer and an emptying valve are also mounted on the branch pipeline I or / and the branch pipeline II. A heat exchanger is arranged on the general pipeline or the branch pipelines. The adjustable pressure reducer comprises more than two throttling nozzles which are mounted in series. The adjustable pressure reducer is provided with a baffle plate in the downstream part, aligned toa nozzle, of each throttling nozzle. The thermometer is mounted on a mounting assembly. The branch pipeline with the adjustable pressure reducer is connected to a gas injection tree interface which is low in gas injection pressure, and the injection flow can be adjusted by adjusting the sizes of the throttling nozzles. As more than two nozzles are mounted, a large throttling pressure difference is achieved by means of gradual pressure reduction. The ablation to the nozzles is small, the long-term accuracy of flow adjustment can be better guaranteed, and the mounted heat exchanger solves the problem of ice blockage.

Description

technical field [0001] The invention relates to the technical field of layered gas injection for oilfield development in the petroleum industry, in particular to a double-pipe split injection CO 2 A ground measuring and adjusting device and a method for using the same. Background technique [0002] In oilfield layered water injection technology, concentric double-pipe separate injection is a commonly used technology. The main feature of this technology is to install two layers of concentrically sleeved tubing downhole, install a layered washable packer on the outer tubing, and set an insertion device to seal the annulus of the inner and outer tubing near the layered packer to realize The annulus of the inner and outer oil pipes inject water into the upper oil layer, and the inner oil pipe injects water into the lower oil layer. [0003] The surface installation of this technology is different from that of conventional water injection wells. Chinese patent application numb...

Claims

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Application Information

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IPC IPC(8): E21B43/16E21B47/00E21B47/06E21B47/07
CPCE21B43/164E21B47/06E21B47/00E21B47/07
Inventor 王世杰李敢王亚洲岳广韬韩博谢桂学毛晓楠张连煜魏伟刘建新
Owner CHINA PETROLEUM & CHEM CORP
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