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

发布时间：2018-02-01 12:25

本文关键词： 蓬莱-油田花岗岩潜山储层成因机制石油地质意义渤海海域　出处：《石油学报》2017年03期 　论文类型：期刊论文

【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。
[Abstract]:Penglai 9-1 oilfield is the largest granite buried hill oil field in China. The genetic evolution of reservoir is complicated and the range of distribution is large. By means of geochemistry, geophysics, experimental simulation and so on, combined with field geological observation. The genetic mechanism and hydrocarbon accumulation model of granite buried hill reservoir in Penglai 9-1 oilfield are discussed. Granite buried-hill in Penglai 9-1 oilfield is formed by active intrusion along the fault in the background of intra-plate cracking of North China plate. The intrusive period is Jurassic 160T 170Ma. it belongs to Yanshanian tectonic curtain magmatic activity in the tectonic domain around the Pacific Ocean. The formation of granite reservoir is controlled by two main processes: supergene karstification and structural transformation. Weathering and denudation in Yanshanian period control the macroscopic development of reservoir. The faults and joints formed by the Cenozoic tectonic movement accelerate the reconstruction of the inside granite reservoir. The distribution range of the thickness of the granite reservoir is positively correlated with the development density of the fault. The vertical direction can be divided into clay belt, sandy belt, cataclastic zone, fracture zone and bedrock zone, and sand belt in the middle and upper part of granite buried-hill. The cataclastic zone and fracture zone are favorable reservoir zones and the main oil-bearing zones. The granite buried hill in Penglai 9-1 oilfield is a "stratiform" reservoir model, and its successful discovery enriches the oil and gas exploration practice in the volcanic rock field. It has important reference value for the study and exploration of oil and gas accumulation law of granite buried hill in similar area of Bohai Sea.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：国家重大科技专项(2016ZX05024-003)资助
【分类号】：P618.13
【正文快照】： 引用: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.Cite:HU Zhiwei,XU Changgui,YANG Bo,HUANG Zhi,SU Wen.Reservoir forming mechanism of Penglai 9-1 granite buried-hillsand its oil geolog

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