渤海海域蓬莱9-1油田花岗岩潜山储层成因机制及石油地质意义

doi:10.7623/syxb201703004

石油学报 ›› 2017, Vol. 38 ›› Issue (3): 274-285.DOI: 10.7623/syxb201703004

渤海海域蓬莱9-1油田花岗岩潜山储层成因机制及石油地质意义

胡志伟, 徐长贵, 杨波, 黄志, 宿雯

中海石油(中国)有限公司天津分公司天津 300452

收稿日期:2016-07-06 修回日期:2016-10-24 出版日期:2017-03-25 发布日期:2017-04-07
通讯作者: 胡志伟,男,1986年8月生,2008年获中国地质大学(武汉)学士学位,2011年获中国地质大学(武汉)硕士学位,现为中海石油(中国)有限公司天津分公司工程师,主要从事含油气盆地构造解析与石油地质综合研究工作。Email:huzhw@cnooc.com.cn
作者简介:胡志伟,男,1986年8月生,2008年获中国地质大学(武汉)学士学位,2011年获中国地质大学(武汉)硕士学位,现为中海石油(中国)有限公司天津分公司工程师,主要从事含油气盆地构造解析与石油地质综合研究工作。Email:huzhw@cnooc.com.cn
基金资助:
国家重大科技专项（2016ZX05024-003）资助。

Reservoir forming mechanism of Penglai 9-1 granite buried-hills and its oil geology significance in Bohai Sea

Hu Zhiwei, Xu Changgui, Yang Bo, Huang Zhi, Su Wen

Tianjin Branch, CNOOC China Limited, Tianjin 300452, China

Received:2016-07-06 Revised:2016-10-24 Online:2017-03-25 Published:2017-04-07

摘要/Abstract

摘要：

蓬莱9-1油田作为中国最大的花岗岩潜山油田，储层成因演化复杂，展布范围变化大。利用地球化学、地球物理、实验模拟等手段，结合野外地质观察，深入探讨了蓬莱9-1油田花岗岩潜山储层的成因机制及油气成藏模式。研究表明：蓬莱9-1油田花岗岩潜山为华北板块板内裂解背景下沿断裂主动侵入形成，其侵入时期为侏罗纪160~170 Ma，属于环太平洋构造域的燕山构造幕岩浆活动产物。表生岩溶和构造改造两大主要作用控制了花岗岩储层的形成，燕山期风化剥蚀控制储层宏观发育，新生代构造运动形成的断裂与节理则加速花岗岩内幕储层改造。横向上花岗岩储层厚度展布范围与断裂发育密度呈现正相关性；垂向上可划分为黏土带、砂质带、碎裂带、裂缝带和基岩带，花岗岩潜山中上部的砂质带、碎裂带和裂缝带为有利储层带和主力含油层段。蓬莱9-1油田花岗岩潜山为"似层状"油藏模式，其成功发现丰富了火山岩领域的油气勘探实践，对渤海海域相似地区花岗岩类潜山油气成藏规律研究及勘探具有重要参考价值。

关键词: 蓬莱9-1油田, 花岗岩潜山, 储层成因机制, 石油地质意义, 渤海海域

Abstract:

The Penglai 9-1 oilfield is the largest granite buried-hill oilfield in China at present, but the reservoir forming mechanism and its evolution is complex, it causes the reservoir distribution varies in large ranges. Based upon geochemical, geophysical, experimental simulation and other methods, and combined with field geological observation, this paper has discussed the reservoir forming mechanism of Penglai9-1 granite buried-hills and its hydrocarbon accumulation model. The results show that the granite buried-hills intruded along deep faults under North China plate crack background, the intrusion period for the Jurassic 160-170 Ma, and the Middle-Late Mesozoic granite belongs to Circum-Pacific Tectonic Region. In the paper, we propose that reservoir forming are controlled mainly by epigenic karstification and tectonic reconstruction; the weathering and denudation in Jurassic affects the reservoir macroscopic development; the faults and joints formed in Cenozoic strengthen the transformation of granite reservoir. Laterally, there is a positive correlation between the fracture density and granite reservoir thickness; Vertically, the granite rock can be divided into five zones:soil zone, sand weathering zone, broken zone, fracture zone and base-rock zone, The upper-middle parts (sand weathering zone, broken zone, fracture zone)of the granite buried-hill are the high-quality reservoir and the main oil reservoir. Penglai9-1is the near-beded reservoir model, the successful discovery of the oil-field has enriched the oil and gas exploration in the field of volcanic rock, and also have important reference value for other granite buried-hills research and exploration in similar areas.

Key words: Penglai 9-1 oilfield, granite buried-hills, reservoir forming mechanism, oil geology significance, Bohai Sea

中图分类号:

TE122.2

胡志伟, 徐长贵, 杨波, 黄志, 宿雯. 渤海海域蓬莱9-1油田花岗岩潜山储层成因机制及石油地质意义[J]. 石油学报, 2017, 38(3): 274-285.

Hu Zhiwei, Xu Changgui, Yang Bo, Huang Zhi, Su Wen. Reservoir forming mechanism of Penglai 9-1 granite buried-hills and its oil geology significance in Bohai Sea[J]. Acta Petrolei Sinica, 2017, 38(3): 274-285.

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渤海海域蓬莱9-1油田花岗岩潜山储层成因机制及石油地质意义

Reservoir forming mechanism of Penglai 9-1 granite buried-hills and its oil geology significance in Bohai Sea

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