地层岩性圈闭识别和评价的关键问题  

Key problems to the identification and evaluation of stratigraphic and lithologic traps

作　　者：刘震[1] 韩军[2] 关强[2] 金博[1] 梁全胜[1] 常迈[1] 

机构地区：[1]中国石油大学(北京)石油天然气成藏机理教育部重点实验室,北京102249 [2]新疆油田公司准东勘探项目经理部,新疆阜康831511

出　　处：《西安石油大学学报（自然科学版）》2007年第3期31-37,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

摘　　要：由于大多数地层岩性圈闭的产状基本与地层界面平行,圈闭具有隐蔽的特点,用传统构造圈闭勘探的方法难以识别.地层岩性圈闭的成藏条件和成藏机理具有一定的特殊性,导致地层岩性圈闭的评价与构造圈闭评价有所不同.从理论和实践两个方面剖析了地层岩性圈闭识别和评价的主要问题,认为存在4大关键问题:①地层岩性圈闭相对不容易识别;②地层岩性圈闭成藏条件钻前预测的准确性目前还不够高;③对形成地层岩性油气藏的运聚机理认识上尚存一定争议;④地层岩性圈闭缺乏专门的评价体系.这些问题是地层岩性圈闭勘探的主要障碍.Because the occurrence of most stratigraphic and lithologic traps is parallel to formation interfaces,it is difficult to identify these traps by the traditional methods used for the structural traps.The particularity of the forming conditions and mechanism of the stratigraphic and lithologic traps make the evaluation of them different from the structural traps.Four difficulties faced in the identification and evaluation of stratigraphic and lithologic traps are put forward based on related theory and practice:(1) identifying the stratigraphic and lithologic traps is difficult;(2) the accuracy of the prediction of the formation conditions of the stratigraphic and lithologic traps is lower before well drilling;(3) there are some arguments in the recognition of the migration and accumulation mechanism of the stratigraphic and lithologic oil-gas reservoirs;(4) lacking a special evaluation system of the stratigraphic and lithologic traps,which is the main barrier to the exploration of the stratigraphic and lithologic traps.

关 键 词：地层岩性圈闭 地震反射 成藏条件 圈闭评价体系 

分 类 号：TE122.3[石油与天然气工程—油气勘探]