碎屑岩成岩拉平处理及沉积作用控制储层物性的定量表征——以珠江口盆地白云凹陷为例

doi:10.7623/syxb2019S1010

石油学报 ›› 2019, Vol. 40 ›› Issue (s1): 115-123.DOI: 10.7623/syxb2019S1010

碎屑岩成岩拉平处理及沉积作用控制储层物性的定量表征——以珠江口盆地白云凹陷为例

王家豪¹, 彭光荣², 柳保军², 郑金云², 杨飞³

1. 中国地质大学(武汉)构造与油气资源教育部重点实验室湖北武汉 430074;
2. 中海石油(中国)有限公司深圳分公司广东深圳 510240;
3. 中国石油大港油田公司勘探开发研究院天津 300280

收稿日期:2018-07-09 修回日期:2018-12-06 出版日期:2019-07-25 发布日期:2019-07-15
通讯作者: 王家豪,男,1968年10月生,1990年获中国地质大学(武汉)学士学位,2005年获中国地质大学(武汉)博士学位,现为中国地质大学(武汉)副教授,主要从事沉积学、层序地层学科研工作。Email:cugwangjiahao@163.com
作者简介:王家豪,男,1968年10月生,1990年获中国地质大学(武汉)学士学位,2005年获中国地质大学(武汉)博士学位,现为中国地质大学(武汉)副教授,主要从事沉积学、层序地层学科研工作。Email:cugwangjiahao@163.com
基金资助:
国家科技重大专项（2016ZX05026-003）资助。

Flattening diagenesis of clastic rocks and quantitative characterization of sedimentary control on reservoir properties: a case study of Baiyun sag in Pearl River Mouth Basin

Wang Jiahao¹, Peng Guangrong², Liu Baojun², Zheng Jinyun², Yang Fei³

1. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Hubei Wuhan 430074, China;
2. Shenzhen Branch of CNOOC China Limited, Guandong Guangzhou 510240, China;
3. Research Institute of Exploration and Development, PetroChina Dagang Oilfield Company, Tianjin 300280, China

Received:2018-07-09 Revised:2018-12-06 Online:2019-07-25 Published:2019-07-15

摘要/Abstract

摘要：

沉积和成岩是碎屑岩储层物性的2个主控因素。沉积物粒度、结构、沉积相及搬运介质的流态制约着储层原生孔隙的发育，并影响着后续成岩作用的路径。然而，由于沉积之后长期的成岩作用影响，沉积对储层物性控制的定量表征难以实施。为此，提出了将物性数据校正至相同成岩作用水平——成岩作用拉平处理的思路。通过对珠江口盆地白云凹陷32口钻井分析化验资料的研究，分析了孔隙度、渗透率交会图及其随埋深的变化规律，识别了异常热演化、浅层钙质胶结和深部次生溶蚀等局部异常成岩作用，剔除了受影响的样品数据。根据拟合地温、埋深与物性的相关性，校正了区域差异成岩的影响，并在此基础上开展了沉积作用对储层物性的控制分析。分析结果表明，储层物性与沉积物粒度和分选性呈正相关，与成分成熟度无关，最有利的储层沉积微相为三角洲前缘水下分流河道和深水扇重力流水道。开展沉积作用对储层物性控制的定量化分析，并形成了完整的控制分析流程，对其他地区的类似研究具有一定借鉴意义。

关键词: 白云凹陷, 珠江口盆地, 深水扇, 储层物性, 成岩作用

Abstract:

Sedimentation and diagenesis are the two main factors controlling clastic reservoir properties. The sediment size, structure, sedimentary facies and the flow regime of transport medium restrict the development of reservoir primary pores and affect the path of subsequent diagenesis. However, due to the long-term diagenesis after sedimentation, it is difficult to quantitatively characterize the reservoir physical property controlled by sedimentation. Therefore, it is proposed to adjust the physical property to correspond with the same level of diagenesis, i.e., flattening diagenesis process. Through studying the analysis and test data of 32 drilling wells in the Baiyun sag, Pearl River Mouth Basin, the abnormal thermal evolution, shallow calcareous cementation, deep secondary corrosion and other local abnormal diagenesis were identified by the porosity-permeability cross plot and the law of variation with buried depth, thus eliminating the affected sample data. According to the correlation between the fitted ground temperature, buried depth and physical properties, the effects of regional differences in diagenesis were corrected, and an analysis was carried out on the control of reservoir physical properties by sedimentation. The analysis results show that the reservoir physical properties are positively correlated with sediment particle size and sorting, unrelated to the maturity of components. The most favorable reservoir sedimentary microfacies are the delta front subaqueous distributary channel and the deep water fan gravity channel. The complete process of quantitative analysis on the reservoir physical properties controlled by sedimentation is useful for similar studies in other regions.

Key words: Baiyun sag, Pearl River Mouth Basin, deep-water fan, reservoir property, diagenesis

中图分类号:

TE122.2

王家豪, 彭光荣, 柳保军, 郑金云, 杨飞. 碎屑岩成岩拉平处理及沉积作用控制储层物性的定量表征——以珠江口盆地白云凹陷为例[J]. 石油学报, 2019, 40(s1): 115-123.

Wang Jiahao, Peng Guangrong, Liu Baojun, Zheng Jinyun, Yang Fei. Flattening diagenesis of clastic rocks and quantitative characterization of sedimentary control on reservoir properties: a case study of Baiyun sag in Pearl River Mouth Basin[J]. Acta Petrolei Sinica, 2019, 40(s1): 115-123.

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碎屑岩成岩拉平处理及沉积作用控制储层物性的定量表征——以珠江口盆地白云凹陷为例

Flattening diagenesis of clastic rocks and quantitative characterization of sedimentary control on reservoir properties: a case study of Baiyun sag in Pearl River Mouth Basin

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