西湖凹陷平湖斜坡带非构造油气藏勘探潜力探讨  

Discussion on the Hydrocarbon Exploration Potential of Non-Structural Reservoir of the Pinghu Slope in Xihu Sag

作　　者：高伟中 田超 赵洪 马清 李暄明 刘春峰 

机构地区：[1]中海石油(中国)有限公司上海分公司,上海200030

出　　处：《海洋石油》2015年第1期22-26,57,共6页Offshore Oil

摘　　要：平湖斜坡带一直是西湖凹陷近年来勘探的主要区域,该区成藏条件有利,但断层发育,发现的均为小型断块油气田,从而认为该带单个油气藏规模小,勘探潜力有限,制约了该区的深化勘探。立足于研究区地质特点,以非构造圈闭为着眼点,通过地震、沉积等综合地质分析,前瞻性的预测并探讨了研究区可能存在的几类非构造油气藏类型,认为该区大断层下降盘控制形成的大型扇三角洲构造—岩性圈闭、古潜山之上的滩坝等岩性圈闭以及潮间带岩性上倾尖灭圈闭等,是未来平湖斜坡带非构造油气藏勘探的有利类型,有望通过非构造圈闭的勘探发现大中型油气田,提升了该带的勘探潜力。Pinghu slope has been the major area of hydrocarbon exploration in Xihu sag in recent years. The oil and gas accumulation conditions in Pinghu slope is favorable, but the oil and gas fields we have found are small scale faulted block oil and gas field due to the well developed faults. Therefore, it is believed that the individual oil and gas reservoir is small in scale, and the hydrocarbon exploration potential in Pinghu slope is limited, which has restricted the further exploration in the study area. Based on the geologi- cal characteristics, with focus on study about the non-structural traps of the study area, comprehensive geology analysis has been conducted, and seismic facies and sedimentary facies have been analyzed, and the possible types of non-structural reservoirs in the study have been predicted. It is believed that the favorable non-structural reservoir types in Pinghu slope are mainly large fan delta structure-lithological traps which are controlled by the footwall of the large fault, the lithological traps of beach bar in the buried hill, and the lithological traps of updip pinching out in the intertidal zone. It＇s possible to find large-size oil and gas fields through explora- tion of the non-structural traps, and the hydrocarbon exploration potential can be increased greatly.

关 键 词：平湖斜坡带 非构造圈闭 下切谷 潮间带 古潜山 

分 类 号：TE122.3[石油与天然气工程—油气勘探]