深水少井区中深层岩性地层圈闭评价方法——以珠江口盆地白云凹陷恩平组白云11目标评价为例  

The evaluation methods of mid-deep litho-stratigraphic traps in deep-water and less-well blocks:a case study of Target Baiyun 11 in Enping Formation,Baiyun sag,Pearl River Mouth Basin

作　　者：韩银学 杨海长 陈莹 赵钊 杨东升 王龙颖 沈怀磊 肖曦 

机构地区：[1]中海油研究总院,北京100028

出　　处：《石油学报》2016年第B11期68-78,共11页Acta Petrolei Sinica

基　　金：国家重大科技专项(2016ZX05026-007);国家自然科学基金重大研究计划项目(No.91528303)资助

摘　　要：白云凹陷是珠江口盆地已证实的富生烃凹陷,主力生烃层系恩平组的勘探前景亟待深入研究。受持续的构造沉降影响,白云凹陷恩平组构造圈闭匮乏,但构造、沉积条件均有利于岩性地层圈闭发育与油气藏的形成。在详细分析恩平组地质条件基础上,搜索落实潜在的岩性地层目标21个,并优选白云11目标进行精细评价。结果表明,白云11目标为三级层序低位期的低位扇沉积,砂体发育,圈闭落实,储层物性良好,成藏条件优越,含气异常特征明显,为白云凹陷中深层有利的自生自储型勘探目标。恩平组自生自储型岩性地层油气藏是白云凹陷油气勘探新领域,而中深层少井条件下的岩性地层圈闭评价方法则为深水区该类油气藏的勘探评价提供了技术支持。Baiyun sag is confirmed to be a hydrocarbon-rich sag in Pearl River Mouth Basin,where the exploration potential of chief source rocks in Enping Formation is urgent to be studied.Because of continuous subsidence,structural traps are insufficient in Enping Formation,Baiyun sag,but structural and depositional conditions are favorable to the development of litho-stratigraphic traps and hydrocarbon accumulation.Based on detailed geological conditions analysis,a total of 21 potential litho-stratigraphic targets were searched and confirmed,and Target Baiyun 11 was selected preferably for fine evaluation.Evaluation results show that Target Baiyun11 is low-stand fan that deposited during lowstand systems tract in the third-order sequence,characterized by the development of sand bodies,traps confirmation,favorable reservoir physical properties,superior reservoir forming conditions and distinct gasbearing anomaly,thus becoming the favorable self-generation and self-reserving exploration target of mid-deep reservoirs in Baiyun sag.The self-generation and self-reserving litho-stratigraphic reservoirs in Enping Formation are the new field for hydrocarbon exploration in the sag.Meanwhile,the evaluation method of lithologic trap in the deep-water and less-well conditions provides a technical support for the exploration and evaluation of such reservoirs in deep waters.

关 键 词：白云11目标 岩性地层圈闭 中深层 评价方法 白云凹陷深水区 

分 类 号：TE122.3[石油与天然气工程—油气勘探]