普光气田须家河组致密砂岩构造裂缝特征及成因探讨  

The Structural Fracture Characteristics and Its Genesis of Tight Sandstone in Xujiahe Formation,Puguang Gas Field

作　　者：熊金红[1,2] 陈岑[3] 李韶凯 

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]北京大学地球与空间科学学院,北京100871 [3]重庆科技学院,重庆401331

出　　处：《科学技术与工程》2017年第12期156-161,共6页Science Technology and Engineering

摘　　要：构造裂缝对四川东北部普光气田须家河组致密砂岩储层储集性能产生了较大影响。因此,研究该地区构造裂缝特征,以及成因可为有效评价与预测有利储层提供强有力的依据。对普陆1井取心岩样进行了岩性分析,以及裂缝的数量、产状及其大小的统计,且在偏光显微镜下观察及统计裂缝的大小、类型及充填情况,结合普陆1井EMI成像测井结果,识别出了须家河组NW-SE向和NE-SW向两期构造裂缝;根据裂缝交切关系确定NW-SE向裂缝早于NE-SW向裂缝的形成。在上述结论的基础上,讨论了川东北地区须家河组地层两期裂缝发育的成因。普光气田须家河组NE-SW走向裂缝与燕山晚期(K2-E1)构造运动有关,而NW-SE走向裂缝与喜马拉雅期早期(E2)构造运动有关。The structural fracture has a great impact on tight sandstone reservoir property in Xujiahe formation, Puguang gas field, which is in the northeast of Sichuan. Therefore, the study on the characteristics, stages and genesis of structural fractures in this area can provide a strong basis for the effective evaluation and prediction of favorable reservoirs. In this paper, we analyze the lithology, count the number, occurrence and the size of the fractures. Observe and count the size, type and the filling situation of the fracture under the microscope. Combining the result of image logging of well Pulu 1, we identify the NW-SE and the NE-SW two stage structural fractures which are in the Xujiahe formation, in the meanwhile, we recognize that NW-SE fracture formed earlier than the NW-SE fracture. On the basis of the above conclusion, we discuss the genesis of two stage fractures in Xujiahe formation ,northeast of Sichuan province. The NE-SW fracture in Xujiahe formation, Puguang field is related to the tectonic movement in late Yanshan （ IC2-E1 ） , while NW-SE fracture is related to the tectonic movement in early stage of Himalayan.

关 键 词：普光气田 须家河组 裂缝特征 成因分析 

分 类 号：TE121.3[石油与天然气工程—油气勘探]