准噶尔盆地五八区复杂岩性与油气层识别

Identifying Complicated Lithological and Oil- gas Zones

准噶尔盆地五八区乌尔禾组-佳木河组储层岩性复杂,油气水层识别难度大。针对这类油藏的特点,利用岩心资料刻度测井资料来识别岩性,提高了可靠性和精确度。在此基础上,利用双孔隙度差值法、三孔隙度比值法、三孔隙度差值法、空间模量差比值法,分别计算各类试油层的判别值,结合常规储层计算参数,制作了综合识别图版来判别各类储层,应用效果较好,尤其是较好地解决了该区气层和油层难以区分的问题。

Lithological property was complicated in Wuerhe-Jiamuhe Formation in Five Eight Region of Junggar Basin, so it was difficult to identify oil, gas and water zones. In consideration of the geological characters of the reservoirs, core data were used to graduate the logging data for identifying the lithological property, by which its reliability and accuracy were improved. Based on the study, the value of all kinds of testing reservoirs, such as double porosity difference, three porosity ratio, three porosity difference, spacial modulu ratio was calculated with the methods. With conventional calculating reservoir parameters, synthetic recognition crossplots are made to identify different reservoirs. The result is good especially for solving the problem of identifying gas and oil zones in the area.