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Deep plugging control system for heavy oil thermal production well and steam steering method

A technology of plugging adjustment and system, applied in the direction of production fluid, wellbore/well components, chemical instruments and methods, etc., can solve the problems of low plugging strength, low oil recovery efficiency, deep steam cannot reach the effective remaining oil area, etc., to achieve Good plugging strength and erosion resistance, the effect of enhancing oil recovery

Active Publication Date: 2022-02-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a steam diversion method for deep plugging of heavy oil thermal recovery wells, which solves the problem of poor channeling effect in deep parts, low plugging strength, and failure of deep steam to reach effective remaining oil areas and oil recovery during steam exploitation of heavy oil. The problem of inefficiency

Method used

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  • Deep plugging control system for heavy oil thermal production well and steam steering method
  • Deep plugging control system for heavy oil thermal production well and steam steering method
  • Deep plugging control system for heavy oil thermal production well and steam steering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1 A kind of plugging adjusting and channeling agent

[0060] The plugging adjustment and channeling agent is composed of the following components and their contents: 1.0wt% elastic rubber powder, 1.0wt% molten oxidized asphalt, 0.05wt% partially hydrolyzed polyacrylamide, 0.03wt% sodium lauryl sulfate, and The amount is water.

[0061] Performance test of the plugging agent for plugging adjustment and channeling

[0062] (1) Deep injection test. use as figure 1 The device shown is used for the deep injectability test of the plugging agent. The test steps are as follows: (1) Fill the sand filling pipe with white quartz sand. The particle size of the quartz sand is 5-10 mesh, and the size of the sand filling pipe is: 2.5cm in diameter and 50cm in length. (2) According to figure 1 Schematic connection of the experimental setup. (3) Inject the plugging adjustment and channeling agent described in Example 1 into the sand packing pipe. The particle size of e...

Embodiment 2

[0081] Embodiment 2 A plugging agent for regulating plugging and channeling

[0082] The plugging adjustment and channeling agent is composed of the following components and their contents: elastic rubber powder 0.5wt%, molten oxidized asphalt 1.0wt%, partially hydrolyzed polyacrylamide 0.05wt%, sodium dodecylbenzenesulfonate 0.03wt% , and the balance is water.

Embodiment 3

[0083] Embodiment 3 A kind of plugging adjusting and channeling agent

[0084] The plugging adjustment and channeling agent is composed of the following components and their contents: elastic rubber powder 0.5wt%, molten oxidized asphalt 2.0wt%, partially hydrolyzed polyacrylamide 0.05wt%, sodium dodecylbenzenesulfonate 0.03wt% , and the balance is water.

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Abstract

The invention relates to the field of heavy oil steam recovery, in particular to a deep plugging control system for a heavy oil thermal recovery well and a steam steering method. A plugging-controlling and channeling-sealing plugging agent comprises elastic particles and high-temperature molten particles, wherein the elastic particles are solid particles which are not decomposed or degraded at a temperature of 250 DEG C and can be elastically deformed; and the physical and chemical properties of the high-temperature molten particles are not changed under the condition that a temperature is lower than 150 DEG C, the high-temperature molten particles can be softened and deformed under the condition that the temperature is higher than 150 DEG C, and the high-temperature molten particles have an adhesion effect. The plugging-controlling and channeling-sealing plugging agent has good injectability in a stratum, and deep migration can be achieved; and the plugging-controlling and channeling-sealing plugging agent can realize effective deep steam steering, can better improve a crude oil recovery rate, and has good plugging strength and scouring resistance.

Description

technical field [0001] The invention relates to the field of heavy oil steam exploitation, in particular to a steam diversion method for deep plugging of heavy oil thermal recovery wells. Background technique [0002] Heavy oil has high specificity, high viscosity, and low freezing point. It is difficult to flow under the formation temperature conditions, and there are great difficulties in ordinary mining. At present, the main development method is thermal recovery of heavy oil, including various methods such as steam huff and puff, steam flooding and burning oil layers, among which steam huff and puff and steam flooding are the main methods. The disadvantage of steam injection to exploit heavy oil is that after continuous steam injection or multiple rounds of huff and puff, the formation has formed a high-permeability mainstream channel for steam migration, which is affected by the sedimentary rhythm of the formation, resulting in a large difference in the steam absorption...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/44E21B33/13E21B43/24
CPCC09K8/44E21B33/13E21B43/24Y02E10/10
Inventor 陈安胜何海峰侯海全魏志高王起晶唐蕊新陈建树
Owner CHINA PETROLEUM & CHEM CORP
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