Therefore,in allusion to geological properties of strong water sensitivity of reservoir,compound fracturing technology of guanidine gum and clean fracturing fluid is selected preferentially.

The study shows that effects of water sensitivity, water lock, Jiamin action and water saturation on 2 phase percolation in low permeability reservoirs, water flow capacity can be effectively improved by reducing interfacial tension, oil-water viscosity ratio and displacement velocity have obvious influence on displacement efficiency.

In consideration of the problem, water sensitivity of the reservoir rock is evaluated in laboratory experiments, the causes of poor water absorting in the injectors of the block .

Reservoir protection for fracturing in strongly water sensitive reservoir in Hubusai area;

For the water flooding development of water sensitive reservoir,pretreatment must be carried out to prevent the clay swelling.

Reforming to water sensitive reservoir,oil or alcoholic base fracturing fluid is only used generally.

Reservoirs in Duanliubo Oilfield are low permeable and highly water-sensitive,thus resulting in high injection pressure and water injection problem.

The Wangzhuang oilfield belong to heavy oil reservoir of strong sensitivity .

Test on anti-swelling water injection in heavy oil reser-voir with strong water sensitivity of Zheng 408 block, Wangzhuang Oilfield;

Factors affecting the water sensitivity of saltwater-freshwater interface;

Research on factors affecting water sensitivity of saltwater-freshwater interface;