Abstract: Reservoir sensitivity refers to the sensitivity of various factors which may cause damage to reservoir. The main purpose to analysis the reservoir sensitivity is to identify the extent of formation damage caused by sensitive and put forward the preventive measures of the extend of sensitive damage. In order to study the damage factors in the exploitation process in Gaoshiti-Moxi block, this paper carried out a lot of core experimental studies, and used sensitivity experiment evaluation method to evaluate the sensitive degree referring to the reservoir evaluation standard. The results show that the degree of velocity sensitivity is medium to strong, the degree of water sensitivity is weak and the degree of salt sensitivity is medium. When pH value is less than 10, the degree of alkali sensitivity is weak. When pH value is more than 10, the degree of alkali sensitivity is strong. Acidification proved the reservoir permeability of the study area.

Key words:  alternating fracturing, complex volumetric fracture networks, stress shadow, principle of superposition, fracture spacing optimization