岩性油气藏 ›› 2023, Vol. 35 ›› Issue (2): 159–168.doi: 10.12108/yxyqc.20230215

• 石油工程与油气田开发 • 上一篇    

渤海湾盆地沾化凹陷新近系馆陶组储层敏感性

姚秀田, 王超, 闫森, 王明鹏, 李婉   

  1. 中国石化胜利油田分公司 孤岛采油厂, 山东 东营 257000
  • 收稿日期:2022-08-21 修回日期:2022-09-01 发布日期:2023-03-07
  • 第一作者:姚秀田(1978-),男,硕士,高级工程师,主要从事油气田开发研究工作。地址:(257000)山东省东营市胜利油田孤岛采油厂。Email:yxiutian@163.com。
  • 通信作者: 王超(1985-),男,本科,高级工程师,主要从事油气田开发研究工作。Email:wangchao990.slyt@sinopec.com。
  • 基金资助:
    国家科技重大专项“渤海湾济阳坳陷致密油开发示范工程”（编号：2017ZX05049-004）资助。

Reservoir sensitivity of Neogene Guantao Formation in Zhanhua Sag, Bohai Bay Basin

YAO Xiutian, WANG Chao, YAN Sen, WANG Mingpeng, LI Wan   

  1. Gudao Oil Production Plant, Shengli Oilfield Company, Sinopec, Dongying 257000, Shandong, China
  • Received:2022-08-21 Revised:2022-09-01 Published:2023-03-07

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摘要： 储层敏感性分析是判别储层伤害程度的重要手段，对后期高效开发和剩余油挖潜具有重要意义。选取渤海湾盆地沾化凹陷垦西油田新近系馆陶组储层岩心样品，结合薄片观察、X射线衍射分析及压汞测试、流动水驱实验，对馆陶组上段和下段储层伤害指数和敏感性特征进行了分析。研究结果表明：①渤海湾盆地沾化凹陷新近系馆陶组储层岩石胶结疏松，孔隙结构总体孔径较大，孔喉分布较均匀，连通性较好；岩石矿物组成以石英、斜长石、钾长石和岩屑为主，黏土矿物主要包括高岭石、伊利石、绿泥石及伊蒙混层；馆上段以细粒为主，馆下段以中粒为主。②馆陶组储层普遍具中等速敏性、弱碱敏性、弱盐敏性特征；上下两段的酸敏性特征差异较大，上段具有非酸敏性特征，而下段具有强酸敏性特征，酸敏指数达78.28%；③研究区馆陶组铁白云石、绿泥石含量及孔隙结构对储层敏感性具有控制作用。④控制注采流速是研究区开发方案中的重要内容，对馆下段酸敏带来的储层伤害要进行防护和治理。

关键词: 储层敏感性, 孔隙结构, 黏土矿物, 储层伤害, 馆陶组, 新近系, 沾化凹陷, 渤海湾盆地

Abstract: Reservoir sensitivity analysis is an important means to evaluate the degree of reservoir damage, which is of great significance for the later efficient development and remaining oil tapping. The core samples from Neogene Guantao Formation in Kenxi oilfield of Zhanhua Sag in Bohai Bay Basin were selected to analyze the damage index and sensitivity characteristics of reservoirs of Guantao Formation in combination with thin section observation, X-ray diffraction analysis, mercury injection test and flowing water drive experiment. The results show that:(1) The Guantao Formation in Zhanhua Sag of Bohai Bay Basin is loosely cemented. The pore structure is characterized by large pore size, uniform distribution of pore throat and good connectivity. The rock minerals are mainly composed of quartz, plagioclase, K-feldspar and rock debris, and the clay minerals mainly include kaolinite, illite, chlorite and chlorite-illite mixed layer. The upper member of Guantao Formation is dominated by fine grains, while the lower member is dominated by medium grains.(2) The reservoirs of Guantao Formation are generally characterized by medium velocity sensitivity, weak alkali sensitivity and weak salt sensitivity. The acid sensitivity characteristics of the upper and lower members are quite different. The upper member has non-acid sensitivity characteristics, while the lower member has strong acid sensitivity characteristics with index of 78.25%.(3) The content of ankerite and chlorite and pore structure of Guantao Formation in the study area control the reservoir sensitivity.(4) Controlling of injection-production flow rate is an important content of the development plan in the study area, while the reservoir damage caused by acid sensitivity in the lower member of Guantao Formation should be protected and treated.

Key words: reservoir sensitivity, pore structure, clay mineral, reservoir damage, Guantao Formation, Neogene, Zhanhua Sag, Bohai Bay Basin

中图分类号: 

  • TE122.2+3
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