A field in-situ collection device and method for soil liquid light hydrocarbons

Abstract

The invention provides a field in-situ collection device and method for liquid light hydrocarbons in soil, which includes a drill assembly, a drill pipe assembly, a handle assembly, and a power supply device and a sealed container; the drill assembly includes a sampling drill cylinder, a conical screw, a heating element, and adsorption material; the sampled soil sample is accommodated in the sampling drill barrel, and the power supply device is electrically connected to the heating element arranged along the inner wall of the sampling drill barrel through the connecting power line arranged on the handle assembly and the drill rod assembly, thereby The soil sample is heated to desorb and gasify the liquid light hydrocarbons in the soil sample; the adsorption material is arranged above the sampling drill bit cylinder and used to adsorb the gasified liquid light hydrocarbons; the conical spiral is arranged on the adsorption material Above, the outer wall is provided with helical blades, which can isolate the soil sample from the upper atmosphere. The present invention realizes in-situ and maximum extraction of C in the soil 5 -C 16 Hydrocarbons can provide effective geochemical indicators for oil and gas exploration.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a micro-leakage liquid light hydrocarbon (i.e., C 5 -C 16 Hydrocarbons) collection device and method. Background technique [0002] Vertical micro-leakage of hydrocarbons in oil and gas reservoirs is the theoretical basis of surface oil and gas geochemical exploration technology. C in the reservoir 5 -C 16 Petroleum hydrocarbons (liquid at normal temperature and pressure) components are not easy to form in the surface environment, and are considered to be more reliable indicators of oil micro-leakage. C 5 -C 16 The molecular weight of petroleum hydrocarbons is relatively heavy, the conditions for seepage are relatively harsh, the seepage period is long, the amount of seepage to the surface is weak, and extraction is difficult. [0003] For surface sediment C 5 -C 16 The extraction technology of petroleum seepage hydrocarbons, the K-V fingerprint technolog...

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Problems solved by technology

However, no matter whether it is indoor adsorption or on-site adsorption, there are problems such as ex-situ, or loss of hydrocarbons, or incomplete adsorption from the soil, and low extraction content.

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