Preservation and deliverability characteristics of coalbed methane,North China;

A Preliminary Discussion on the Relationship between Yanshanian Regional Metamorphism and Ore Deposit Genesis in North China;

Conductivity Structure of Lithosphere in Central North China: Magnetotelluric Study of Yingxian-Shanghe profile;

China' s LPG Market Analysis and Forecast--Northern China to be the Next Booming Area;

Research on Relationship Between Sequence Strata and Coal－accumulation of Late Palaeozoic Coal－accumulating Basin in Northern China;

Carbon content rate in constructive species of main forest types in northern China.;

An Analysis on Land Use Dynamics in Huabei Region During Recent Ten Years;

An analysis of the Relevence of the Minor Earthquakes in Luxi Area and Medium-intense Earthquakes in Huabei Area;

Discoveries and their implications in the stratigraphic-lithologic reservoir exploration of Huabei oilfield;

Field test on movable gel as profile control and flooding in Huabei Oilfield;

Strengthen Project Management and Raise Exploration Benefit-Management of Exploration Projects of PetroChina Huabei Oilfield Company;