A method for preparing reservoir cuttings imitating natural cemented core

Abstract

The application provides a method for preparing reservoir cuttings imitating natural cemented core, the method comprising: selecting oilfield reservoir cuttings; preparation of cement: the cement is prepared from silicate and fluorosilicate Forming; fixed molding: mix the cement and the reservoir rock cuttings uniformly to obtain a mixture; put the mixture into a mold, and mold it for 12 to 20 minutes under a pressure of 10 to 25 MPa to obtain a formed rock core ;Drying: taking out the shaped core and drying it to obtain the natural cemented core of the reservoir cuttings. The imitation natural cemented rock core of the reservoir rock cuttings of the application not only has the pore throat characteristics and permeability characteristics of the natural rock core, but also has the sensitivity and strong particle cementation characteristics of the natural rock core.

Description

technical field [0001] The present application relates to a method for making rock cores in the field of oil field geology and chemistry, in particular to a method for preparing rock cuttings imitating natural cemented rock cores in reservoirs under the condition of no reservoir rock cores. Background technique [0002] Most of the oil layers in China's oilfields are sandstone oilfields, and the geological conditions of the blocks are different. With the continuous development of oilfields, the number of water injection wells and production wells has been increasing, and the number of new drilling and production stimulation wells has also been increasing every year. For any block, from drilling to production, as long as there is fluid entering, the compatibility test between the fluid entering the well and the natural core must be carried out. For non-renewable resources, the natural cores of some formations and even blocks are not available at present; the above reasons mak...

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Problems solved by technology

For any block, from drilling to production, as long as there is fluid entering, the compatibility test between the fluid entering the well and the natural core must be carried out. For non-renewable resources, the natural cores of some formations and even blocks are not available at present; the above reasons make it impossible to carry out many experiments related to reservoir compatibility, resulting in the pertinence and effectiveness of stimulation measures cannot be guaranteed

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