渤海海域新近系层序地层格架约束下岩性圈闭发育特征分析及精细刻画——以石臼坨凸起明下段为例
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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。
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.
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.
引文
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[2]田立新,余宏忠,周心怀,等,黄河口凹陷油气成藏的主控因素[J].新疆石油地质,2009,30(3):319-321.
[3]余宏忠,李建平,彭文绪,等.黄河口凹陷明下段浅水三角洲沉积与岩性油气藏勘探[J].大庆石油地质与开发,2009,28(2):1-7.
[4]于海波,牛成民,彭文绪,等.黄河口凹陷新近系断裂-砂体控藏分析——以垦利3-2构造为例[J].中国海上油气,2010,22(3):149-154.
[5]朱伟林,李建平,周心怀,等.渤海新近系浅水三角洲沉积体系与大型油气田勘探[J].沉积学报,2008,26(4):575-582.
[6]张昌民,尹太举,朱永进,等.浅水三角洲沉积模式[J].沉积学报,2010,28(5):933-944.
[7]龚再升,王国纯.渤海新构造运动控制晚期油气成藏[J].石油学报,2001,22(2):1-7.
[8]周心怀,牛成民,腾长宇.环渤中地区新构造运动期断裂活动与油气成藏关系[J].石油与天然气地质,2009,30(4):469-475.
[9]纪学武,夏义平,康南昌,等.岩性地层圈闭识别工作步骤及配套技术[J].石油地球物理勘探,2008,43(1):101-106.
[10]李庆忠.岩性油气藏地震勘探若干问题讨论[J].岩性油气藏,2008,20(2):1-5.
[11]张江华,林承焰,王友净.地震地质精细预测技术在岩性油气藏勘探中的应用——以大港滩海张东地区为例[J].石油地球物理勘探,2009,44(2):206-211.
[12]王西文.岩性油气藏的储层预测及评价技术研究[J].石油物探,2004,43(6):511-515.
[13]张明振,谭明友,王兴谋.济阳坳陷第三系隐蔽油气藏储层预测配套技术[J].地球物理学进展,2005,20(1):42-48.
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