逆断层和聚敛型扭断层下盘圈闭条件分析及勘探意义  

Analysis of Footwall Trap Conditions of Reversed Fault and Convergent Torsion Fault and Its Significance of Exploration

作　　者：丁文龙[1] 金之钧[2] 丁艳红[3] 

机构地区：[1]清华大学自动化系,北京100084 [2]中国石油勘探开发科学研究院,北京100083 [3]河南油田分公司勘探开发研究院,河南南阳473132

出　　处：《江汉石油学院学报》2003年第1期30-31,34,共3页Journal of Jianghan Petroleum Institute

基　　金：中国石油天然气集团公司"九五"重大科技攻关项目(96007-07)

摘　　要：在压扭性含油气盆地勘探中,早期主要集中在断褶构造带的构造高部位,并已找到了许多断背斜、断鼻型油气藏;但随着勘探的深入,不得不考虑这些断褶构造下盘由逆断层和聚敛型扭断层封闭所形成的断层圈闭。虽然断层下盘圈闭在数量上和总的油气储量上一般都要比断层上盘背斜圈闭的低,但有时断层下盘的圈闭可以形成储量很大的油气藏,目前国内外均找到了这类油气藏。对柴达木盆地西部阿尔金走滑断裂带圈闭条件的实例研究,进一步明确了由逆断层和聚敛性扭断裂封闭的断层下盘圈闭是构造-岩性油气藏形成的有利部位,是一个值得重视的油气勘探新领域。In compress-shear oil and gas bearing basin exploration, early exploration is concentrated on the high position of fault-fold structural zone, many fault-anticline, fault-nose hydrocarbon reservoirs are found, but with the deepening of exploration, the fault trap formed by the reversed fault and convergent torsion fault of these fault-fold structural footwall has to be considered. Though the amount and total hydrocarbon reserve of the fault footwall trap are lower than that of the hanging wall, but sometimes the trap of the fault footwall could form hydrocarbon reservoirs with significant reserves, these kinds of reservoirs are found both at home and abroad. From the case study made on the trap conditions of Altun strike-slip fault zone to the west of Qaidam Basin, it is further proven that the fault footwall trap sealed by the reversed fault and convergent torsion fault footwall trap is the favorable position of forming structural lithologic reservoirs, which is a new sphere of hydrocarbon exploration , on which great attention would be paid.

关 键 词：逆断层 聚敛型 扭断层下盘 圈闭条件 油气勘探意义 

分 类 号：P618.13[天文地球—矿床学] TE13[天文地球—地质学]