The Elastic Response Simulation And Attribute Analysis Of Fractured Tight Sandstone Reservoir

Nowadays the international oil and gas consumption is reducing.The oil and gas exploration and production of the 13 th Five-Year plan will be profoundly affected by the downturn.The oil and gas market in China has become more steady and mature after the economic downturn.Exploration and development practice has proved that the unconventional oil and gas resources become the main growth of China's oil production.The tight sandstone reservoirs have rich reserves.It can provide plenty of clean energy by tight gas.All these features made the tight sandstone reservoir become one of the most important unconventional oil and gas resources.In China,tight sandstone gas reservoir are widely distributing in Ordos basin,Sichuan basin,Changing oilfield,etc.New exploration technologies are urgently needed to reduce costs during the current situation.This paper mainly complete four aspects of researches.First,the different equivalent medium model is utilized to calculate the p-wave velocity of tight sandstone.Based on the 3D convolution model,the seismic attributes are calculated to demonstrate the effectiveness of the special method of recognition of tight sandstone dessert.Third,the paper use the geophysical parameters obtained from the equivalent medium model to established proper 3D forward modelling method.The PML absorbing boundary is applied here to fit the high order staggered grid FD numerical simulation method.Then the pre-stack migration is used to obtain seismic data which can test the capacity of sand body identification by eliminating the effect of processing steps.Finally,an effective method which can identify tight sandstone dessert is established.