岩性油气藏 ›› 2015, Vol. 27 ›› Issue (5): 161–166.doi: 10.3969/j.issn.1673-8926.2015.05.026

• 油气地质 • 上一篇    下一篇

渤海海域 L 油田新近系明化镇组下段与馆陶组储层沉积微相研究

徐中波,康 凯,申春生,何 滨,林国松,李 林   

  1. 中海石油(中国)有限公司天津分公司,天津 300452
  • 出版日期:2015-09-26 发布日期:2015-09-26
  • 第一作者:徐中波( 1984- ),男,硕士,工程师,主要从事油田开发地质方面的研究工作。 地址:( 300452 )天津市塘沽区闸北路 1 号渤海石油研究院 609 信箱蓬莱开发室。 电话:( 022 ) 25809474 。 E-mail : xuzhb2@cnooc.com.cn 。
  • 基金资助:

    国家重大科技专项课题“渤海海域大中型油气田地质特征”(编号: 2011ZX05023-006-002) 资助

Sedimentary microfacies of Neogene Guantao Formation and lower Minghuazhen Formation in L oilfield, Bohai Bay

Xu Zhongbo, Kang Kai, Shen Chunsheng, He Bin, Lin Guosong, Li Lin   

  1.  Tianjin Branch of CNOOC Ltd. , Tianjin 300452 , China
  • Online:2015-09-26 Published:2015-09-26

摘要:

根据渤海海域 L 油田 3 口取心井的岩心观察,结合室内实验测试数据和地球物理资料的综合分析,对 L 油田新近系明化镇组下段及馆陶组储层的岩石学和沉积学特征进行了综合研究。 L 油田新近系明化镇组下段与馆陶组储层以长石砂岩为主,明化镇组下段储层砂岩分选中等,磨圆度以次棱角—次圆状为主,而馆陶组储层砂岩的分选较差,磨圆度以次棱角状为主。储层砂岩发育低角度交错层理、槽状交错层理、冲刷面以及植物根茎等河流相沉积构造特征,同时,泥岩以杂色为主,也反映了一种浅水弱氧化-弱还原环境和氧化环境。 综合粒度概率累积曲线、C-M 图与测井曲线图,认为明化镇组下段主要为曲流河沉积,发育边滩、曲流河道、废弃河道、决口扇和泛滥平原沉积微相;馆陶组主要为辫状河沉积,发育心滩、辫状河道、河道边和河道间沉积微相。

关键词: 储层岩石, 应力敏感, 应力敏感指数, 实验, 岩心分析

Abstract:

The reservoir petrology and sedimentology of lower Minghuazhen Formation(N1m) and Guantao Formation (N1g) were comprehensively studied by detailed core observation, lab experiment data and geophysical data of 3 coring wells in L oilfield in Bohai Bay. The reservoirs are mainly composed of feldspar sandstone. The sandstone of lower N1m is mainly of medium sorting and subangular-subround roundness, while the sandstone of N1g is mainly of poor sorting and subangular roundness. The sandstone developed various sedimentary structures that can reflect river deposition, including low angle cross bedding, trough cross bedding, erosional surfaces and plant roots. Meanwhile, the variegated mudstone deposited also reflects a kind of shallow weak oxidation-reduction and oxidation environment. Accorded to grain size probability cumulative curves, C-M plot and logging characteristics, the lower N1m mainly developed meandering river deposits that can be divided into point bar, channel, abandoned channel, crevasse splay and floodplain microfacies; whereas, the N1g developed braided river deposits that can be divided into channel bar, braided channel, channel margin and interchannel microfacies.

Key words:  reservoir rocks, stress sensibility , stress-sensibilityindex , experiment , core analysis

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