local load
4.Abstract: A number of comprehensive study data of cores,structures,inclusions,well-testing performance and fracture pressure gradient have shown that there are several fracture types in the Jurassic tight sandstone reserviors of western Sichuan basin,such as local structures,subtraction (load relieving),stratification and corrosion etc.The leading origin type of fracture is the paleo-subtractive one formed by uplifting subtraction during geohistorical process,which is the main percolation passage in the process of oil/gas concentration,reservoiring and production.
9.In the study of load series forecasting, a more accurate method named classification based on local association rules (CLAR) is proposed to mine association rules between influence factors and load series. Rules are stored in rules prefix general list (RPG-List), which reduces the storage and facilitates rule matching. Then a classifier based on rules is constructed.

