Apparatus and method for simulating dynamics of hydrocarbon generation and expulsion in geological process

An experimental device for dynamics of hydrocarbon generation and expulsion, comprising a reactor having a sample chamber formed therein for placing a sample, a sample sleeve being arranged within the sample chamber for receiving the sample,

• wherein the sample sleeve comprises a cylindrical body enclosing the sample in a circumferential direction, an outer side wall of the cylindrical body being in engagement with an inner side wall of the reactor,
• wherein the cylindrical body comprises:
• a plurality of neck portions each having a relatively small outer diameter, at least one flow hole being formed on each of the neck portions to pass through the neck portion along a radial direction, wherein the neck portion is spaced apart from the inner side wall of the reactor to form a gap in communication with the flow hole when the sample sleeve is arranged within the reactor, and the flow hole overlaps the outer side wall of the sample when the sample is arranged within the sample sleeve;
• and
• a plurality of closed portions each having a relatively large outer diameter, the plurality of closed portions and the plurality of neck portions being alternately arranged along a longitudinal direction, and the closed portions abutting against the inner side wall of the reactor when the cylindrical body is arranged within the reactor,
• wherein at least one flow groove passing through the cylindrical body along the longitudinal direction are formed on the cylindrical body and in communication with the gap between each neck portion and the inner side wall of the reactor, so that the channel for product circulation is formed between the outer side wall of the sample and the inner side wall of the reactor through the flow hole, the gap and the flow groove.