Method and apparatus for testing viscous oil viscosity on well boring coring site

Abstract

The present invention provides a method and an apparatus for testing viscous oil viscosity on a well boring coring site, and belongs to the field of tests in oil-gas field exploration and development. According to the present invention, a standard viscosity oil is adopted to calibrate a capillary to obtain a calibration constant of the capillary; a viscous oil sample of the taken rock or detritus is squeezed out, and the squeezed sample passes through a pore type filtration device, and enters a sample chamber; the viscous oil sample in the sample chamber is driven to pass through the calibrated capillary under a certain pressure through a driving pump or a gas pump; and pressure and sample flows on both ends of the capillary are tested, and a viscosity value of the viscous oil sample can be obtained according to a viscosity formula. According to the apparatus, deficiencies of the existing viscosity test method are overcome, the viscous oil sample can be rapidly obtained on the well boring coring site, the viscous oil viscosity test at a reservoir temperature under reservoir pressure can be completed, viscous oil viscosity data can be conveniently and timely acquired, and basis is provided for viscous oil reservoir evaluation and development program formulating.

Description

technical field [0001] The invention belongs to the field of testing in the exploration and development of oil and gas fields, and in particular relates to a method and a device for testing the viscosity of heavy oil at drilling and coring sites. Background technique [0002] Viscosity is one of the most important parameters for evaluating heavy oil reservoirs. High-quality viscosity data are very important for heavy oil reservoir evaluation, development plan formulation, gathering and processing. Volatile components in heavy oil have a great influence on the viscosity of heavy oil. To obtain accurate crude oil viscosity data, active crude oil samples that can best reflect the original state of the reservoir are needed. If the active crude oil can be measured on site in the mine, relatively accurate viscosity data can be obtained. [0003] At present, most of the methods for testing the viscosity of heavy oil are to take samples from the wellhead of production wells, and u...

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Problems solved by technology

The literature "Basic Experimental Research on Rheological Properties of Heavy Oil" (see "Special Oil and Gas Reservoirs" December 2009) mainly uses the German RV20 electrorheological instrument to conduct viscosities of heavy oil samples obtained on site in the laboratory. The loss of light components in the process of taking out and transporting to the laboratory is relatively large, the sample cannot reflect the actual situation of the reservoir well, and the test data is inaccurate

[0006] In the literature "Discussion on Viscosity Test Conditions of Heavy Oil" (see "Xinjiang Petroleum Science and Technology" No. 3, 2009), the German Hacker RS150 rheometer is mainly used to test the viscosity of heavy oil samples obtained on site in the laboratory. The samples cannot It reflects the actual situation of the reservoir very well, but the test data is not accurate

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