Research On Application Of Seismic Inversion In Reservoir Prediction In Qian 153 District Of Song Liao Basin

Qian 153 district belongs to the QianAn oilfield of Songliao basin,its objective interval is Gaotaizi reservoir.Now,the block enter into the phase of rolling extension and development adjusting,sand body development degree and its distribution restricts the scrolling development process. The paper mainly use the continuous high precision 3D seismic data,chose the method combined constrained sparse pulse inversion(based on seismic trace inversion) with geostatistics inversion,focus on carrying out seismic inversion and reservoir prediction,combining with the characteristics of hydrocarbon accumulation in the area,And make the evaluation of potential area and drilling target optimization.The paper obtain the main understanding and achievements include:It can showed by constrained sparse pulse inversion profile,the Gaotaizi oil layers’ wave impedance overall performance higher values, the upper reservoir’s wave impedance value is higher,with the development of major reservoir 39,40 small layer corresponding,wave impedance values and sand body development has a good consistency.The wave impedance distribution characteristic shows,the wave impedance values of northwest and central work area are big,and wave impedance has good continuity;And eastern and southwest have small wave impedance values,wave impedance has poor continuity and with patchy distribution.Using geostatistical inversion method,predicting the sand body distribution and the characteristics of porosity distribution. The sand centrally distribute in the northwestern and central and the thickness of sandstone become thinner gradually to the southwest of work area.High porosity value areas in the northwest and the east, among them,northwest porosity value is about 14.5%- 18%,eastern porosity value is about 8%-20%.Based on the eastern reservoir characteristics and analysis on the main control factors,using the sand body prediction results above, established the standard of favorable area optimization.The area defined by faults between fault Qian 153-19-3 and its synthetic fault in the east,it’s sand bodies are thicker,reservoir porosity is also higher,can be used as the next rolling development zone.Use 400m×220m rhombic inverted nine-spot well pattern deployment,in batches to deploy 28 Wells,include 20 oil wells and 8 water wells.