2D high-resolutionm seismic inversion application in Sulige Gasfield
Liu Xueqing1, Wei Fuji2, Wang Daquan3, Qin Li4, Bai Yuchun5
1. School of Geophysics and Information Technology,China University of Geosciences(Beijing),Beijing 100083,China;
2. Geophysical Exploration and Development Company,Shengli Oilfield Branch Co.,SINOPEC,Dongying,Shandong 257086,China;
3. Yunnan Geophysical Company,Southwest Petroleum Bureau,SINOPEC,Kunming,Yunnan 650233,China;
4. Geophysical Prospecting Company,Chuanqing Drilling Engineering Limited Company,CNPC,Chengdu,Sichuan 610213,China;
5. Reservoir and Geophysics Research Center,BGP Inc.,CNPC,Zhuozhou Hebei 072751,China
Abstract：The resolution of 2D seismic inversion de-pends on that of the seismic data.So it is difficultto identify the reservoir with the thickness lessthan 5m.Combined with the high-resolution of 3Dgeostatistical inversion and the relationships be-tween 2D and 3D seismic data，we transform 2Dseismic data into pseudo 3D seismic data firstly，then complete the high-resolution geo-statisticalinversion on 2D seismic data by the geo-statisticalinversion algorithm for the 3D seismic data，whichcan effectively improve the vertical resolution of 2Dinversion to meet geological requirements for thevertical resolution of 2D seismic reservoir predic-tion. At the same time，combined with pre-stackAVO elastic wave impedance inversion and thegeostatistical inversion，we can effectively identifythe plane distribution characteristics of thin reser-voirs by 2D seismic data. So we achieved the purposeof predicting thin reservoirs on 2D seismic data.
