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Chemical flooding injection well and production well blockage simulation device and method

A technology for simulating devices and production wells, applied in wellbore/well components, earthwork drilling and production, and production fluids, etc., which can solve problems such as lack of impact on oil displacement effects

Active Publication Date: 2022-02-18
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many physical models for chemical flooding mechanism research at home and abroad, but there is still a gap in the design of existing models for the characteristics of injection and production in chemical flooding oilfields, especially the phenomenon of abnormal liquid production decline in chemical flooding oilfields in offshore oilfields; There is a lack of better methods for model design in the research of the liquid production decline caused by plugging in chemical flooding and the effects of different plugging locations and plugging sizes on the oil displacement effect in model experiments.

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  • Chemical flooding injection well and production well blockage simulation device and method

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Embodiment 1

[0028] A chemical flooding injection well and production well plugging simulation device, the device is composed of a cube, the inside of the cube is filled with quartz sand, injection well simulation string 1, several production wellheads (including the first production well simulation string 2, The second production well simulation string 3, the third production well simulation string 4, and the plugged production well simulation string 5), and a saturation electrode 8 and a pressure sensor 9 are arranged in the horizontal direction.

[0029] The model body can use a sand-filled model or an artificial cemented model to complete the original porosity and permeability zone 7, and the filling material is quartz sand of a certain mesh.

[0030] The size of the model body is 30cm*30cm*4.5cm. Sand-filled models and artificial cemented models can be used to complete the original porosity and permeability zone 7. The filling material is quartz sand with a mesh size of 60-80 mesh. Th...

Embodiment 2

[0036] A method for using a chemical flooding injection well and production well plugging simulation device described in the above-mentioned embodiment 1, that is, a specific implementation process of a chemical flooding injection well and production well plugging simulation method is as follows:

[0037] 1. Model making: Fill the sand model or purchase the artificial cemented flat plate model according to the design plan and the actual situation of the blockage, and prepare according to the model instructions. First, choose 60-80 mesh quartz sand to arrange the original porosity and permeability area 7 and 100-120 mesh quartz sand to arrange the blockage area 6, and set 6*6 saturation electrodes 8 and pressure sensors 9 along the entire model in advance .

[0038] 2. The model simulates the one-injection and three-production well pattern of 1 / 4 anti-nine-point well group, and sets the injection well simulation string 1, the first production well simulation string 2, and the s...

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Abstract

The invention discloses a chemical flooding injection well and production well blocking simulation device and method. The device comprises a model box, an injection well simulation tubular column, a production well simulation tubular column, a blocked production well simulation tubular column, a saturation electrode pair and a pressure sensor. According to the device, a physical simulation experiment can be carried out on a common heavy oil reservoir with different blocking positions or sizes of an injection well and a production well in a chemical flooding process, the characteristics of blocking positions, blocking sizes and the like of the injection well and the production well in different development stages of chemical flooding are simulated, and the oil-water migration state can be observed through the model; the blocking mechanism of the injection well and the production well and the influence of blocking on oil-water seepage and liquid production characteristics are studied, and meanwhile the effect of the blocking removal measure is predicted.

Description

technical field [0001] The invention belongs to the field of petroleum industry, and in particular relates to a plugging simulation device and method for chemical flooding injection wells and production wells. Background technique [0002] In order to realize the physical simulation of developing characteristic laws in the process of chemical flooding, it has been applied in the petroleum industry. At present, there are many physical models for chemical flooding mechanism research at home and abroad, but there is still a gap in the design of existing models for the characteristics of injection and production in chemical flooding oilfields, especially in the simulation of abnormal liquid production decline in chemical flooding oilfields in offshore oilfields; There is a lack of better methods in model design for the research on the liquid production decline caused by chemical flooding plugging and the effect of different plugging positions and plugging sizes on the oil displa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B43/22
CPCE21B47/00E21B43/16Y02A10/40
Inventor 田津杰阚亮王成胜陈士佳王刚杨彬敖文君陈斌季闻方月月孔丽萍侯岳吴雅丽刘文华
Owner CHINA NAT OFFSHORE OIL CORP
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