Abstract: Oil and gas which derived from oil source rock must be sent to oil-bearing reservoir,so that it can be stored and then it can be used.The porosity of the rock mass is very important for the stored energy,and the induced porosity has much more things to do with it (because with the lithogenesis come on,and the primary porosity will be reduced and the induced porosity will play important part in oil accumulation).The genesis of induced porosity and related some questions are discussed.