大池干井、黄草峡构造嘉二~2储层预测  

RESERVOIR PREDICTION OF T_1j_2~2 IN DACHIGANJING AND HUANGCAOXIA STRUCTURES

作　　者：邹定永[1] 孔令霞[1] 

机构地区：[1]中国石油西南油气田分公司勘探开发研究院

出　　处：《天然气工业》2005年第S1期57-58,116-7,共4页Natural Gas Industry

摘　　要：近几年,在川东大池干井构造和黄草峡构造上,池57井、草31井都在下三叠统嘉陵江组嘉二2获得高产工业气流。为了在嘉二2获得更好的经济效益,就有必要搞清川东嘉二2储层的地质、测井特征及其分布规律。但嘉二2岩性变化大、储层薄的特点给储层预测工作带来了极大的困难。对池57井和草31井的测井资料的分析可知,嘉二2岩性在石灰岩、白云岩及石膏之间变化,而其储层主要发育在白云岩中,厚度为2~15m。对过池57井、草31井的2条地震测线做Strata速度反演和DCI密度反演,分析结果可知2条测线的密度反演剖面要好于速度反演剖面,与实际地质、测井情况更加吻合。根据川东嘉二2储层声波变化不大,而密度相对围岩要小的特点,文章提出用Strata速度反演与DCI密度约束反演联合识别川东嘉二2薄储层的方法。In recent years, the high producing gas flow has been achieved from T_1j2_2 (second submember of the second member of Jialingjiang Formation, Lower Triassic) in wells Chi-57 and Cao-31 in Dachiganjing and Huangcaoxia structures in East Sichuan. It is necessary for raising economic returns to find out the geological and logging features of T_1j2_2 reservoir and its distribution law, but it is very difficult to predict the T_1j2_2 reservoir because of its changeful lithology and small thickness. Through analy...

关 键 词：四川盆地 东 早三叠世 储集层 预测 围岩 Strata速度反演 DCI密度约束反演 岩性 

分 类 号：P618.13[天文地球—矿床学]