Petroleum exploration of Tanggu oil field in Beitang sag of Huanghua depression, Tianjin, China;

The characteristics of fracture reservoir of the Permian Lucaogou formation in Heidun oilfield show the best.

The Permian reservoir in Heidun oilfield shows complex lithology, poor physical properties, narrow pore throat and poor sorting of pore throat, high water and acid susceptibility, low speed susceptibility, water wettability and developed fractures which is the main store space and drainage channel.

Flow unit classification and microscopic percolation feature of Toutunhe Formation reservoir in Santanghu Oilfield

Low-permeability reservoir evaluation for Niuquanhu Area of Santanghu Oilfield

In order to effectively solve severe circulation loss in block Niudong in Santanghu oilfield,strengthen reservoir protection during drilling,increase production of individual well,under balance drilling technology during the process of filling nitrogen was used in the research of the region.