白云深水区定量烃类检测技术与岩性圈闭形成机制研究引领隐蔽气藏.PDFVIP

白云深水区定量烃类检测技术与岩性圈闭形成机制 研究引领隐蔽气藏发现 胡 琏，刘 军，陈 亮，彭光荣，郑金云，白海军 ( 中海石油有限公司深圳分公司研究院，广东广州 510240) 摘要：白云深水区经过20 多年勘探实践，发现天然气三级储量超千亿方，油气勘探巨大潜力和前景已得到证实， 珠江组深水沉积储层是天然气勘探的主力层系。然而近期的自营勘探遇到新的问题：1 利用振幅、亮点、AVO 属性识别储层和含气性的常规勘探技术遇到瓶颈，根本原因是埋藏条件变深、孔隙度降低后砂岩储层阻抗属性 与围岩差异变小，气藏的地震显性特征完全消失；2 由于缺乏构造圈闭，白云深水区必须向岩性圈闭勘探转型， 而深水区岩性圈闭勘探缺少成熟的模式。针对这些问题，深水勘探团队从储层流体识别技术攻关和深水沉积条 件下的岩性圈闭形成机制研究入手，应用了近年来地球物理发展的新技术和深水沉积的理论，提出了适合于深 水区的更完善的勘探技术组合。主要包括：地震速度约束下的叠前同步反演；岩石物理定量解释量版；深水沉 积结构关系解剖和水道侧封型岩性圈闭理论研究。深水勘探团队综合运用上述方法在白云深水区开展了新一轮 隐蔽岩性油气藏目标的评价工作，并钻探获得了近500 亿方新增天然气储量，取得了较好的应用效果。 关键词：白云深水；烃类检测；岩性圈闭；水道下切；岩石物理 Quantitative Hydrocarbon Detection Technique and Stratigraphic Trap Formation Mechanism study Lead to Hidden Gas Filed Discovery in Baiyun Deep-water Area HU Lian, LIU Jun, CHEN Liang, PENG Guangrong, ZHENG Jinyun, BAI Haijun (Institute of CNOOC Ltd.-Shenzhen, Guangzhou, 510240, China) Abstract: For more than 20 years of exploration in Baiyun deepwater area, over 100 billion cubic meters of natural gas has been discovered. Huge petroleum exploration potential and future have been confirmed. Deepwater sediments of Zhujiang formation is the main strata of gas exploration. However, there have been new issues with self-operated exploration: 1. Favorable targets have not been found by reservoir and gas detection techniques such as amplitude, bright spot, and AVO. The reasons are larger burial depth, decreased porosity caused the lower impedance between sandy reservoir and surrounding rocks. Seismic characteristics of gas reservoirs have vanished. 2. Due to the lack of structural traps, exploration in Baiyun deepwater area has turned to lithologic traps, but these traps 基金项目：国家重大专项(2008ZX05025-003，2011ZX05