Experimental device for shale movable oil ration determination

Abstract

The invention provides an experimental device for shale movable oil ration determination, the experimental device comprises a formation water container, a high-pressure constant-pressure pump, a heating furnace, a high-pressure kettle and an oil collecting bottle, wherein the high-pressure constant-pressure pump is connected between the formation water container and the high-pressure kettle to inject fluid in the formation water container into a shale sample in the high-pressure kettle and exert and control pressure equivalent to the fluid pressure under formation condition, the high-pressure kettle is arranged in the heating furnace, the heating surface is used for heating the high-pressure kettle and controlling the temperature equivalent to that under the formation condition; the oil collecting bottle is connected with the high-pressure kettle and used for collecting the fluid produced by compressing and decompressing the shale sample in the high-pressure kettle. The experimental device for shale movable oil ration determination is capable of stimulating the shale oil production feature at the high-temperature high-pressure condition underground, the property and the quantity of the experimentally produced shale oil are closer to those of the underground time condition, the determined shale movable oil ratio and proportion can be directly applied to the resource evaluation of the shale oil and the guidance of exploration of the shale oil.

Description

Technical field [0001] The invention relates to the technical field of shale oil exploration and development, in particular to an experimental device for quantitative determination of shale movable oil. Background technique [0002] Shales in the mature hydrocarbon generation stage generally contain a large amount of liquid oil, which is an important unconventional oil and gas resource. With the successful exploration and development of shale oil and gas abroad, the liquid oil in shale has attracted more and more attention from petroleum geologists. Because minerals and kerogen organic matter in shale have strong ability to adsorb and bind oil, under underground conditions, only part of the oil can be produced, that is, part of it is movable. The determination of the amount of movable oil is an important parameter for shale oil resource evaluation and shale oil exploration deployment. Due to the late start of shale oil exploration and development research, there is currently no...

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Problems solved by technology

Extracting organic matter in shale with chloroform can quantitatively characterize the oil content in shale, but due to the strong extraction ability of chloroform, there are both movable oil and bound oil in the extraction product, so the amount of movable oil cannot be determined; The pyrolysis parameter S of the solution experiment 0 and S 1 The amount of free hydrocarbons in shale can be evaluated and studied, but due to the limitation of the method, only part of the movable oil can be measured, and the relative amount of hydrocarbon in part of the movable oil can only be characterized, while the non-hydrocarbon and Asphaltene cannot be quantitatively measured; NMR logging and NMR core analysis methods can be used for the determination of movable oil and bound oil in conventional reservoirs, but are not suitable for shale with small pore volume and complex oil occurrence state, because the shale The NMR signals of movable oil and bound oil in rock are difficult to distinguish

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