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Zeolite profile control agent and method for injecting zeolite profile control agent into profile control well

A profile control agent, zeolite technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problem of insignificant profile control effect of polymer flooding well, difficult operation of injection method, and heterogeneity of oil layer. Influence and other problems, to achieve the effect of good driving effect, low price, and increase the residual resistance coefficient

Active Publication Date: 2007-04-11
DAQING OILFIELD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a zeolite profile control agent and a method for injecting the zeolite profile control agent into the profile control well, which can solve the problem of high cost and the oil layer’s impact on the use of composite ion polymer profile control agent or volume expansion particle profile control agent. Due to the influence of heterogeneity, the profile control effect of some polymer flooding wells is not obvious; in addition, the injection method is difficult to operate when using the above two profile control agents

Method used

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specific Embodiment approach 1

[0019] Embodiment 1: The zeolite profile control agent of this embodiment is composed of the following raw materials: zeolite, polymer and water; the weight ratio between the zeolite, polymer and water is 0.5~5.0:0.04~0.08: 100, the particle diameter of the zeolite is 40-200 mesh, the polymer is anionic polyacrylamide, and the molecular weight of anionic polyacrylamide is 2500×10 4 .

specific Embodiment approach 2

[0020] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the weight ratio between the zeolite, polymer and water in the zeolite profile control agent of this embodiment is 0.6:0.06:100, and the The particle diameter of the zeolite is 40-65 meshes, the polymer is anionic polyacrylamide, and the molecular weight of the anionic polyacrylamide is 1200×10 4 . Using the above technical parameters, the sedimentation velocity of the zeolite is 3.2mm / s.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the weight ratio between the zeolite, polymer and water in the zeolite profile control agent of this embodiment is 4.8:0.08:100, and the The particle diameter of the zeolite is 65-160 mesh, the polymer is anionic polyacrylamide, and the molecular weight of the anionic polyacrylamide is 1900×10 4 . Using the above technical parameters, the sedimentation velocity of the zeolite is 7.3mm / s.

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Abstract

The present invention relates to profile control agent, and is one kind of zeolite profile control agent and method of injecting the zeolite profile control agent into profile control well. The zeolite profile control agent consists of zeolite of 40-200 mesh size, polymer of anion type polyacryamide and water in the weight ratio of 0.5-5.0 to 0.04-0.08 to 100. The zeolite profile control agent is injected into profile control well with profile controlling hydraulic pump in the amount of 5,000-10,000 cu m each well and the injection radius of 1 / 3-1 / 2 distance between the profile control well and the oil well. The zeolite profile control agent can increase the residual resistance factor and raise the oil recovering rate by 3 percentage points, and has simple injection process.

Description

technical field [0001] The invention relates to a profile control agent and an injection method. Background technique [0002] At present, some major oil fields in China are gradually entering the development period of ultra-high water cut, and the contradiction between layers is becoming more and more serious. With the expansion of the scale of polymer flooding, profile control has become one of the important technical measures to improve the effect of polymer flooding, increase oilfield efficiency and tap potential, and enhance oil recovery. At present, the Daqing Oilfield mainly uses composite ionic polymer profile control agents or volume expansion particle profile control agents. Although the above two profile control agents have achieved good profile control effects, there are still high cost of profile control agents and the influence of oil layer heterogeneity. Influenced by qualitative properties, the profile control effect of some polymer flooding wells is not sig...

Claims

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Application Information

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IPC IPC(8): C09K8/58E21B43/22
Inventor 苏延昌石志成马辉吴小刚程富利
Owner DAQING OILFIELD CO LTD
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