Sedimentary response of sand body and formation models of lithologic traps under different hydrodynamic conditions

doi:10.7623/syxb2019S1009

Acta Petrolei Sinica ›› 2019, Vol. 40 ›› Issue (s1): 105-114.DOI: 10.7623/syxb2019S1009

• Petroleum Exploration • Previous Articles Next Articles

Sedimentary response of sand body and formation models of lithologic traps under different hydrodynamic conditions

Zhang Xiangtao, Du Jiayuan, Ding Lin, Huang Xin, Jia Peimeng, Li Xiaoping, Li Zhigao, Li Xiao

CNOOC Deepwater Development Limited, Guangdong Shenzhen 518000, China

Received:2018-07-10 Revised:2018-11-26 Online:2019-07-25 Published:2019-07-15

不同水动力机制下砂体沉积响应及岩性圈闭形成模式

张向涛, 杜家元, 丁琳, 黄鑫, 贾培蒙, 李小平, 李智高, 李潇

中海石油深海开发有限公司广东深圳 518000

通讯作者: 丁琳,女,1981年1月生,2004年获长江大学学士学位,2015年获长江大学博士学位,现为中海石油深海开发有限公司高级工程师,主要从事珠江口盆地(东部)综合地质研究工作。Email:dinglin@cnooc.com.cn
作者简介:张向涛,男,1969年10月生,1993年获石油大学(华东)学士学位,1996年获石油大学(华东)硕士学位,现为中海石油深海开发有限公司高级工程师,长期从事珠江口盆地(东部)油气勘探与地质研究工作。Email:zhangxt1@cnooc.com.cn
基金资助:
国家科技重大专项（2016ZX05026-003-003）资助。

Abstract

Abstract:

Huizhou area is a favorable area for lithologic trap exploration in Pearl River Mouth Basin, characterized by variable hydrodynamic conditions and abundant sedimentary microfacies types. The sedimentary response of sand body and the development models of lithological traps are also varying under different hydrodynamic conditions. Based on finely analyzing the drilled lithological traps, the core, logging and seismic geological and geophysical methods are used to study the hydrodynamic conditions, sedimentary microfacies and lithologic trap formation patterns of the typical sand bodies in Zhujiang Formation, Huizhou area. The results indicate that the sedimentary systems are developed under hydrodynamic conditions in the study area, i.e., the long shore sand bar system in Member 5 of Zhujiang Formation during the early transgression period under the hydrodynamic action of coastal current and tide; the composite system involving the near end, distal end and estuary dam of underwater distributaries at the delta front in Member 4 of Zhujiang Formation during the transgression period under river hydrodynamic conditions; the continental sand ridge system in the high stand system tract of Member 4 of Zhujiang Formation during the late development period under tidal hydrodynamic conditions. According to the characteristics of sand body pitch-out, the development patterns of lithologic traps can be divided into three types, i.e., pitch-out caused by erosion, slow pitch-out, and rapid pitch-out. Exploration practice shows that the geological success rate of lithologic traps in Huizhou sag is nearly 75%, and oil and gas has been found in lithologic traps in multiple sand body pitch-out modes. Therefore, the analysis of favorable sand body sedimentary response and lithologic trap development model under different hydrodynamic conditions is a key step in the fine exploration of lithologic traps, which is of important guiding significance for deep exploration of lithologic traps in similar areas.

Key words: Huizhou area, Zhujiang Formation, hydrodynamic mechanism, sedimentary response, lithologic traps, formation model

摘要：

珠江口盆地惠州地区是岩性圈闭勘探的有利区之一，具有水动力多变、沉积微相类型丰富的特点，不同水动力条件下的砂体沉积响应及岩性圈闭发育模式也不同。在精细解剖已钻岩性圈闭基础上，采用岩心、测井、地震等地质与地球物理手段，对惠州地区珠江组典型砂体沉积水动力条件、沉积微相展布及岩性圈闭形成模式进行了分析。结果表明，研究区发育3类水动力作用下的沉积体系：珠江组五段海侵早期发育沿岸流、潮流水动力作用为主的滨岸砂坝体系；珠江组四段海侵期发育以河流水动力作用为主的三角洲前缘水下分流河道近端、远端与河口坝复合体系；珠江组四段高位晚期则发育以潮汐水动力作用为主的陆架砂脊体系。根据砂体尖灭特征，可将岩性圈闭发育模式划分为3种，即侵蚀尖灭型、缓慢尖灭型、快速尖灭型。勘探实践表明，惠州地区岩性圈闭勘探地质成功率近75%，已在多个砂体尖灭模式下的岩性圈闭中发现油气。因此，不同水动力条件下有利砂体沉积响应及岩性圈闭发育模式分析是岩性圈闭精细勘探的关键环节，对于深度挖掘类似地区岩性圈闭的勘探潜力具有重要的指导意义。

关键词: 惠州地区, 珠江组, 水动力机制, 沉积响应, 岩性圈闭, 形成模式

CLC Number:

TE122.3

Zhang Xiangtao, Du Jiayuan, Ding Lin, Huang Xin, Jia Peimeng, Li Xiaoping, Li Zhigao, Li Xiao. Sedimentary response of sand body and formation models of lithologic traps under different hydrodynamic conditions[J]. Acta Petrolei Sinica, 2019, 40(s1): 105-114.

张向涛, 杜家元, 丁琳, 黄鑫, 贾培蒙, 李小平, 李智高, 李潇. 不同水动力机制下砂体沉积响应及岩性圈闭形成模式[J]. 石油学报, 2019, 40(s1): 105-114.

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Sedimentary response of sand body and formation models of lithologic traps under different hydrodynamic conditions

不同水动力机制下砂体沉积响应及岩性圈闭形成模式

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