苏码头构造须二段储层物性下限研究  

Lower Limit of Petrophysical Property for Xujiahe 2 Member, Sumatou Structure

作　　者：曾琪[1] 马华灵[1] 刘柏[1] 米庆[2] 

机构地区：[1]中国石油西南油气田公司川西北气矿,四川江油621709 [2]中国石油西南油气田公司川中油气矿,四川遂宁629000

出　　处：《天然气技术与经济》2016年第6期6-8,共3页Natural Gas Technology and Economy

摘　　要：前人对苏码头构造须二段开展了一定程度的研究,但在储层物性下限方面的研究较为薄弱,制约了对该区有效储层展布的研究,致使该区须二段勘探迄今尚无太大进展。为此,采用气—水毛细管压力法、相渗透率法和最小孔喉半径法确定了该区储层物性下限标准,将工区须二段储层产工业性天然气的孔隙度下限定为4.5%,对应含水饱和度上限45%,渗透率下限值0.017 3 m D;如只考虑是否有天然气产出,则含水饱和度上限可提高至65%。该下限标准的提出,为低缓构造带有效储层识别提供了依据。For Xujiahe 2 Member of Sumaotou structure, some previous research on the lower limit of petrophysical property was comparative rare, restricting the study of effective reservoir'distribution, and further resulting in little progress in the exploration of Xujiahe 2 reservoir. So, in this study, three methods of gas-water capillary pressure, relative permeability, and minimum pore throat radius were used to confirm the standards of lower limit. It is concluded, commercial gas is produced from Xujiahe 2 reservoir while the lower limit of porosity of 4.5%, corresponding to permeability of0.0173 m D and the upper limit of water saturation of 45%. Natural gas is not obtained from this reservoir until the upper limit of water saturation increasing to 65%. The proposed lower limit may provide evidence for confirming effecting reservoirs in low and gentle structures.

关 键 词：苏码头构造 须二段 物性下限 气—水毛细管压力 相渗透率 最小孔喉半径 

分 类 号：P618.13[天文地球—矿床学]