Fractured-vuggy carbonate rock plate model and preparation method thereof

A carbonate rock and carbonate technology, which is applied in earthwork drilling, wellbore/well components, etc. Wetness and interface electrical properties

Inactive Publication Date: 2015-03-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
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Problems solved by technology

However, sand-packing pipes and conventional artificial cores are homogeneous models, which cannot simulate their structural characteristics, so they cannot truly reflect the applicability of various EOR methods to this type of reservoir
And other simulation methods, such as using laser to engrave glass for visual experiment simulation, and using 3D printers to print fracture-cavity cores, etc., due to the coating on the surface of glass and rock particles in 3D printing (mostly resin cement) The nature of the hydrochloride rock is quite different from that of the hydrochloride rock, so the adsorption of the surfactant on the surface of the carbonate rock and the influence of the wettability and interface electrical properties of the carbonate rock on the enhanced oil recovery cannot be reflected in the experiment

Method used

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Examples

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Effect test

example

[0018] Using this model and the glass etching model respectively, the study on the enhanced oil recovery of surfactant flooding after water flooding was carried out. Under the condition of 60°C, two kinds of model saturated crude oil were used and aged for 24 hours, then water flooded to 98% water content, then 0.5% surfactant solution 0.3 PV was injected, and then water flooded to 98% water content. The recovery factors of the two models after flooding are shown in Table 1.

[0019] Table 1 Summary of displacement effects of different models

[0020] Model

[0021] It can be seen from Table 1 that the water flooding recovery effects of the two models are roughly the same, but the effects of surfactant solution injection and subsequent water flooding are quite different. Analyzing the reason, it is found that the adsorption amount of the surfactant on the surface of carbonate rock is much larger than that on glass, and the lipophilicity of carbonate rock is stronge...

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Abstract

The invention provides a fractured-vuggy carbonate rock plate model and a preparation method thereof. The model is characterized by being prepared by a cementing material after a natural carbonate rock plate is carved, wherein the cementing material is evenly mixed by carbonate rock powder of 0.01-1 micron and curing agent solution according to the mass ratio of 75: 25; the curing agent solution is mixed by furan resins and epoxy resins of 10-15%, m-phenylenediamine and diaminodiphenyl-methane of 35-40% and the balance of glycerin; and the sum of all the components is 100%. The prepared fractured-vuggy carbonate rock plate model can truly reflect the influence on each recovery improvement mode and fractured-vuggy carbonate rocks from such properties as the absorption of a surface active agent on the carbonate rocks, the wettability of the carbonate rocks and the interface electrical property.

Description

Technical field: [0001] The invention relates to a fractured-vuggy carbonate plate model and a preparation method thereof, which are mainly used for evaluating the applicability of technologies such as surfactant flooding and foam flooding for improving the recovery rate of fractured-vuggy carbonate reservoirs. Background technique: [0002] Worldwide, carbonate reservoirs account for 52% of proven oil reserves and 60% of total oil and gas production. The proven reserves of carbonate rock reservoirs in western China are abundant, which is one of the main fields for increasing oil reserves and production. Carbonate reservoirs are mostly anticline structures, with many faults, developed fractures, poor fault sealing, complex reservoir structure, serious heterogeneity, and low matrix permeability. Taking the Tahe Oilfield in my country as an example, it has well-developed fractures and caves, making coring difficult. Sand-packed pipes and conventional artificial cores are hom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 王洋葛际江林杨张贵才蒋平
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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