东海西湖凹陷平北地区断裂发育特征与油气聚集

杨彩虹; 曾广东; 李上卿; 梁若冰

doi:10.11781/sysydz201401064

东海西湖凹陷平北地区断裂发育特征与油气聚集

doi: 10.11781/sysydz201401064

中国石化上海海洋油气分公司, 上海 200120

基金项目: 中国石化油气勘探重大先导项目“中国石化海域探区勘探潜力与区带评价”资助。

详细信息

作者简介:
杨彩虹（1969-），女，高级工程师，从事油气勘探研究。E-mail：yangcaihong.shhy@sinopec.com。

中图分类号: TE122.3
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出版历程
- 收稿日期: 2013-09-10
- 修回日期: 2013-12-10
- 刊出日期: 2014-01-28

Fault development characteristics and hydrocarbon accumulation in Pingbei area of Xihu Sag, East China Sea

SINOPEC Shanghai Offshore Petroleum Company, Shanghai 200120, China

摘要

摘要: 西湖凹陷平北地区断层发育，圈闭以复杂断块为主，断裂与油气藏关系密切，断层的发育期次、开启与封闭、组合样式，直接影响到油气的运移、聚集和富集程度。平北地区发育了全盛型、早盛型和中盛型3种类型断层，断层的活动时期、断层两盘的岩性配置以及泥岩涂抹等是影响断层封闭性的主要因素。平湖组早盛型断层封闭性最好，平湖组—花港组全盛型断层封闭性相对较差。不同断层组合圈闭的油气富集程度具有明显差别，顺倾向断层组合圈闭油气富集程度最高，反倾向断层组合圈闭油气富集程度相对较低，顺倾向与反倾向断层组合圈闭油气富集程度居于中等，根据以上认识优选目标钻探效果良好。
- 断层 /
- 封闭性 /
- 油气聚集 /
- 平北地区 /
- 西湖凹陷 /
- 东海
Abstract: In the Pingbei area of the Xihu Sag in the East China Sea, faults are well-developed, and traps are mainly complex blocks. The generation stage, open/close and combination style of faults directly affect the migration, accumulation and enrichment of oil and gas. The faults in the study area can be classified into 3 types: peak-flourishing, early-flourishing and mid-flourishing. The active period of faults, the lithologic configuration at both sides of the faults and shale smear are the key elements influencing fault sealing. The faults of early-flourishing type in the Pinghu Formation boast the best sealing while those of the peak-flourishing type in the Pinghu-Huagang Formations are relatively worse. There are obvious differences in the degree of hydrocarbon accumulation between various combinations of faults. The combinations of cis-dipping faults show the highest degree of hydrocarbon accumulation; the combinations of anti-dipping faults show the lower degree of hydrocarbon accumulation; the combinations of both cis-dipping and anti-dipping faults show the middle level of hydrocarbon accumulation.
- fault /
- sealing ability /
- hydrocarbon accumulation /
- Pingbei area /
- Xihu Sag /
- East China Sea

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