Reservoir Description On Tight Sandstone Gas Reservoir In Shan186 Block Of Sulige Gas Field

In allusion to the feature of Sulige Gas Filed in Ordos Basin that single sand is thin and the effective reservoir has little difference with rock,leading to the problem that common inversion technology being difficult to describe reservoir well,Shan 186 block in Sulige Gas Field was chosen as study area to look for appropriate ways to improve the success prediction rate of tight gas reservoir dessert and effectively direct the horizontal well designing.High precision 3d seismic data and drilling,logging data were used to predict the main reservoir,Neopaleozoic Permian Shihezi Formation he8 member and Shanxi Formation shan1 member.Firstly,basic seismic structure interpretation was applied to learn the distribution of small structure,and Seismic attribute analysis,spectral decomposition techonology was used to qualitatively predicting the thick sand distribution.Secondly,analysis purpose layer on the basis of the front study,geostatistical inversion was combined with poisson’s ratio inversion to quantitative description of reservoir: the geostatics inversion on the basis of Monto-Carlo theory was used to finely describe the thin sand at Neopaleozoic Permian Shihezi Formation he8 member,the longitudinal precision accuracy is 10 m,as well as quantitatively describe the thickness of reservoir and effective reservoir by using pre-stack elastic parameter inversion,at the same time,brittleness inversion was innovatively used to predict the distribution of reservoir brittleness.Lastly,on the basis of inversion method,Geomodeling techonology was applied to describe the properties and space distribution of effective reservoir.Based on the above analysis,comprehensive evaluation was used to describe the space distribution of thickness,physical properties and hydrocarbon content of effective reservoir,described I and II advantageous areas 153.79km2 of he8 and shan1 member,formed the fine description techonology of tight sanstone gas reservoir that suitable for the wellblock,and provides technical support for horizontal well development at tight gas reservoir in Sulige Gas Field.