CAPROCK OF THE HUAGANG FORMATION IN THE CENTRAL INVERSEDSTRUCTURAL ZONE OF XIHU SAG, EAST CHINA SEA BASIN

ZHANG Zhou; ZHAO Hong; LUO Renchun; ZHANG Wu; ZHU Honghao

doi:10.16028/j.1009-2722.2020.066

2020 Vol. 36, No. 10

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ZHANG Zhou, ZHAO Hong, LUO Renchun, ZHANG Wu, ZHU Honghao. CAPROCK OF THE HUAGANG FORMATION IN THE CENTRAL INVERSEDSTRUCTURAL ZONE OF XIHU SAG, EAST CHINA SEA BASIN[J]. Marine Geology Frontiers, 2020, 36(10): 50-56. doi: 10.16028/j.1009-2722.2020.066

Citation:

ZHANG Zhou, ZHAO Hong, LUO Renchun, ZHANG Wu, ZHU Honghao. CAPROCK OF THE HUAGANG FORMATION IN THE CENTRAL INVERSEDSTRUCTURAL ZONE OF XIHU SAG, EAST CHINA SEA BASIN[J]. Marine Geology Frontiers, 2020, 36(10): 50-56. doi: 10.16028/j.1009-2722.2020.066

CAPROCK OF THE HUAGANG FORMATION IN THE CENTRAL INVERSEDSTRUCTURAL ZONE OF XIHU SAG, EAST CHINA SEA BASIN

1.
Shanghai Branch of CNOOC China Limited, Shanghai 200335, China
2.
CNOOC Marketing Shanghai Co. Ltd., Shanghai 200335, China

Received Date: 02 June 2020

Publish Date: 28 October 2020

Abstract

Abstract

The sealing mechanism of the Huagang Formation caprock and its influencing factors in the central inversed structural belt of the Xihu Sag remain unclear up to date. In this paper, we used various methods, such as core observation, microscopic examination, X-ray diffraction, and the methods specially designed for study of lithology and diagenesis to assess the quality of a caprock and its influencing factors in order to know more about the caprock in the region. Breakthrough pressure testing was also made. The analysis of influencing factors suggests that the total thickness of the cover of flood plain facies in the Huagang Formation of the region belt is the largest, followed by the facies of the distributary bay, while the total thickness of the cover between waterways is the smallest. The study of diagenesis suggests that the diagenesis of compaction, cementation and metasomatism is constructive, while that of dissolution and shale contraction is destructive. Diagenesis has strong effects on the development of pores at different depths, which directly effects the sealing ability of the caprock. In the study area, the facies of flood plain is the most favorable facies, and cementation and compaction are the most favorable diagenesis for caprock development. Combined with the distribution characteristics of caprock and breakthrough pressure, a four-level system for caprock assessment is established in this paper.
- caprock /
- breakthrough pressure /
- sedimentary diagenesis /
- Xihu Sag /
- East China Sea Basin

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References

[1]	吕延防,付广,张发强,等. 超压盖层封烃能力的定量研究[J]. 沉积学报,2000,18(3):465-468. doi: 10.3969/j.issn.1000-0550.2000.03.024 CrossRef Google Scholar
[2]	付广,王有功,苏玉平. 超压泥岩盖层封闭性演化规律及其研究意义[J]. 矿物学报,2006,56(4):453-459. doi: 10.3321/j.issn:1000-4734.2006.04.015 CrossRef Google Scholar
[3]	黄劲松,刘长国,牟广山. 贝尔凹陷大一段下部旋回泥岩盖层封闭能力综合评价[J]. 大庆石油学院学报,2009,33(6):19-24. Google Scholar
[4]	李建民,王树海. 贝尔凹陷布达特群潜山盖层封闭能力综合评价[J]. 大庆石油学院学报,2006,30(3):8-10,36. Google Scholar
[5]	吴世祥,金之钧,汤良杰. 盖层水岩相互作用研究及其油气地质意义:以黔中隆起及周缘为例[J]. 地质学报,2007,81(8):1110-1117. doi: 10.3321/j.issn:0001-5717.2007.08.010 CrossRef Google Scholar
[6]	张军涛,吴世祥,李宏涛,等. 川东南志留系泥岩盖层水岩相互作用的实验模拟及其研究意义[J]. 石油实验地质,2011,33(1):96-99,104. doi: 10.3969/j.issn.1001-6112.2011.01.016 CrossRef Google Scholar
[7]	王存武,赵志刚,张功成,等. 东海西湖凹陷盖层条件及对油气藏的控制作用[J]. 海洋石油,2013,33(2):22-27. doi: 10.3969/j.issn.1008-2336.2013.02.022 CrossRef Google Scholar
[8]	赵洪,秦兰芝,王辉,等. 砂岩在西湖凹陷花港组交互式盖层中的作用初探[J]. 西南石油大学学报(自然科学版),2018,40(3):43-51. doi: 10.11885/j.issn.1674-5086.2016.11.05.01 CrossRef Google Scholar
[9]	熊斌辉,张喜林,张锦伟,等. 西湖凹陷油气成藏的主控因素[J]. 海洋石油,2008,28(2):14-24. doi: 10.3969/j.issn.1008-2336.2008.02.003 CrossRef Google Scholar
[10]	张银国. 东海西湖凹陷花港组油气地质条件与油气分布规律[J]. 石油实验地质,2010,32(3):223-226. doi: 10.3969/j.issn.1001-6112.2010.03.004 CrossRef Google Scholar
[11]	苏　奥. 东海盆地西湖凹陷中央反转构造带油气成藏控制因素[D].武汉: 中国地质大学(武汉), 2014. Google Scholar
[12]	李祥权,刘金水,陆永潮,等. 东海陆架盆地西湖凹陷花港组原型盆地性质厘定[J]. 地球科学,2018,43(2):502-513. Google Scholar
[13]	张国华,刘金水,秦兰芝,等. 西湖凹陷渐新统花港组大型辫状河沉积体系特征[J]. 中国海上油气,2018,30(3):10-18. Google Scholar
[14]	秦兰芝,刘金水,李帅. 东海西湖凹陷中央反转带花港组锆石特征及物源指示意义[J]. 石油实验地质,2017,39(4):498-504. doi: 10.11781/sysydz201704498 CrossRef Google Scholar
[15]	周雁,金之钧,朱东亚,等. 油气盖层研究现状与认识进展[J]. 石油实验地质,2012,34(3):234-251. doi: 10.3969/j.issn.1001-6112.2012.03.002 CrossRef Google Scholar
[16]	刘金水,曹冰,徐志星,等. 西湖凹陷某构造花港组沉积相及致密砂岩储层特征[J]. 成都理工大学学报(自然科学版),2012,39(2):130-136. Google Scholar
[17]	刘金水,陆永潮,秦兰芝. 源-汇系统分析方法在大型储集体研究中的应用:以西湖凹陷中央反转带花港组为例[J]. 石油实验地质,2019,41(3):303-310. doi: 10.11781/sysydz201903303 CrossRef Google Scholar
[18]	付行,杜学斌,徐国盛,等. 东海宁波构造带深层花港组砂岩储层致密性特征及控制因素[J]. 海洋石油,2018,38(1):1-8. doi: 10.3969/j.issn.1008-2336.2018.01.001 CrossRef Google Scholar
[19]	林承焰,孙小龙,马存飞. 西湖凹陷中央反转构造带花港组储层物性演化[J]. 中国矿业大学学报,2017,46(4):820-829. Google Scholar
[20]	俞凌杰,范明,刘伟新,等. 盖层封闭机理研究[J]. 石油实验地质,2011,33(1):91-95. doi: 10.3969/j.issn.1001-6112.2011.01.015 CrossRef Google Scholar
[21]	吕延防,张绍臣,王亚明. 盖层封闭能力与盖层厚度的定量关系[J]. 石油学报,2000,21(2):27-30. doi: 10.3321/j.issn:0253-2697.2000.02.005 CrossRef Google Scholar
[22]	赵洪,蒋一鸣,沈文超. 西湖凹陷花港组物源特征及对储层的影响研究[J]. 煤炭科学技术,2018,46(2):65-72. Google Scholar
[23]	高伟中,孙鹏,赵洪,等. 西湖凹陷花港组深部储层特征及控制因素[J]. 成都理工大学学报(自然科学版),2016,43(4):396-404. Google Scholar