【摘要】 岩性圈闭预测与成藏研究是石臼坨凸起成熟区油气勘探获得新突破的关键。以石臼坨凸起明下段为例,在层序地层格架约束下开展沉积体系发育特征研究,创新提出并应用浅水三角洲发育模式,将研究区岩性圈闭划分为沉积型岩性圈闭和改造型复合岩性圈闭2种类型;在此基础上,通过层序地层格架约束下的砂体测井-地震响应特征分析,采用"五步法"砂体精细刻画技术,实现了对研究区岩性圈闭的识别与精细刻画。实际钻井结果表明,在石臼坨凸起新近系应用本文提出的岩性圈闭识别与精细刻画技术取得了丰硕的勘探成果,钻井地质成功率达到了100%,而且指导了又一个亿吨级油田的发现。更多还原

【Abstract】 Lithologic trap prediction and hydrocarbon accumulation research are the key to making a new breakthrough of hydrocarbon exploration in the maturing zone of Shijiutuo rise.Taking Lower Member of Minghuazhen Formation in the rise as a case,the development characteristics of sedimentary systems was researched under the framework of sequence stratigraphy,and a model of shallow-water delta was proposed and applied innovatively so as to divide the lithologic traps into two types,i.e.the depositonal type and the reworked-compound type.Furthermore,through analyzing the logging-seismic responses of sandbodies under the framework of sequence stratigraphy,an identification and refined depiction of lithologic traps were achieved in the study area by using "the five-step method" of refined sandbody depiction.According to the drilling results,the application of the technique to identify and depict refinedly lithologic traps has led to rich achievements of Neogene exploration in Shijiutuo rise,with the geological drilling success ratio up to 100%,and the discovery of a hundred-million-ton-level oilfield been guided.更多还原