Pore Structure Characterization of Clay Minerals in the Lower Karamay Formation Conglomerate Reservoir in the Junggar Basin and its Impact on Hydrocarbon Storage and Seepage

The micro-nano pore structure of conglomerate in the Lower Karamay Formation Xinjiang Oilfield, Junggar Basin, northern China is characterized to predict its impact on fluid reserves and seepage. Authigenic clay minerals are mainly kaolinite (67%), followed by an illite/smectite mixed layer (18%), illite (10%), chlorite (5%). For kaolinite, throats between 0–200 nm dominant, accounting for 90% total throats. layer, also account nearly 80%, while 200-500 only 15%. illite, below 100 about range 100–500 20%. chlorite, most 200 nm. roundness highest, relatively lower. lower limits dynamic static throat radii 42.128 72.42 nm, respectively. theoretical contribution rates storage/seepage 60%/45.86%, 52.72%/38.18%, 37.07%/28.78% 32.97%/26.3%, Therefore, study area as follows: chlorite.