岩性油气藏 ›› 2018, Vol. 30 ›› Issue (3): 143–152.doi: 10.12108/yxyqc.20180316

• 油气田开发 • 上一篇    下一篇

近岸水下扇储层构型及剩余油分布模式——以柴达木盆地七个泉油田E31油藏为例

常海燕1,2, 严耀祖1,2, 陈更新1,2, 郭宁3, 项燚伟3, 杨会洁4   

  1. 1. 中国石油勘探开发研究院 西北分院, 兰州 730020;
    2. 中国石油天然气集团公司油藏描述重点实验室, 兰州 730020;
    3. 中国石油青海油田分公司 勘探开发研究院, 甘肃 敦煌 736202;
    4. 中国石油青海油田分公司 天然气处, 甘肃 敦煌 736202
  • 收稿日期:2017-12-13 修回日期:2018-02-12 出版日期:2018-05-21 发布日期:2018-05-21
  • 作者简介:常海燕(1972-),女,硕士,工程师,主要从事沉积相和沉积储层方面的研究工作。地址:(730020)甘肃省兰州市城关区雁儿湾路535号。Email:chang-hy@petrochina.com.cn
  • 基金资助:
    国家重大科技专项“柴达木复杂构造区油气成藏、关键勘探技术与新领域目标优选”（编号：2016ZX05003-006）和中国石油天然气股份有限公司重大科技专项“柴达木盆地建设高原大油气田勘探开发关键技术研究与应用”（编号：2016E-01）联合资助

Reservoir configuration and remaining oil distribution patterns of nearshore subaqueous fan: a case from E31 reservoir in Qigequan Oilfield, Qaidam Basin

CHANG Haiyan1,2, YAN Yaozu1,2, CHEN Gengxin1,2, GUO Ning3, XIANG Yiwei3, YANG Huijie4   

  1. 1. PetroChina Research Institute of Petroleum Exploration & Development-Northwest, Lanzhou 730020, China;
    2. Key Laboratory of Reservoir Description, China National Petroleum Corporation, Lanzhou 730020, China;
    3. Research Institute of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang 736202, Gansu, China;
    4. Department of Natural Gas, PetroChina Qinghai Oilfield Company, Dunhuang 736202, Gansu, China
  • Received:2017-12-13 Revised:2018-02-12 Online:2018-05-21 Published:2018-05-21

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摘要： 为了解决近岸水下扇储层相变快和非均质性强而导致的开发难题，以柴达木盆地七个泉油田E31油藏为例，通过取心井岩性精细描述和分析，结合铸体薄片和测井曲线特征，进行储层构型单元级次划分及多井联合对比，并最大限度地利用密井网动态资料辅助验证，明确了储层构型单元砂体剖面展布特征和规模，建立了各级构型单元的识别特征图版及近岸水下扇内部构型模式。结果表明：目的层E31自下而上可划分为扇根、扇中、扇端亚相，并细分出5个5级构型要素和9个4级构型要素；E31油藏剩余油分布模式包括断层遮挡形成的剩余油、非主流线滞留区的剩余油、不同构型单元间韵律性差别形成的剩余油、坝间低渗缓冲带遮挡形成的剩余油、注采井网不完善形成的剩余油等5种类型。研究结果为七个泉油田进一步挖潜提供了地质依据。

关键词: 特低渗储层, 孔隙组合类型, 可动流体饱和度, 主流喉道半径, 驱替类型, 鄂尔多斯盆地

Abstract: In order to solve the development difficulties caused by rapid phase change of reservoir and strong heterogeneity in nearshore subaqueous fan,taking the E31 reservoir of Qigequan Oilfield in Qaidam Basin as an example,through lithology description and analysis of coring holes,combined with casting thin section and logging curve characteristics,the reservoir configuration units division and well-tie section comparison were carried out. With the aid of the dynamic data of dense well network,the sand body distribution characteristics and scale in the reservoir configuration units were defined,and the identification chart of the configuration units at all levels and the internal configuration pattern of the nearshore subaqueous fan were established. The results show that the target layer E31 can be divided into root fan,middle fan and end fan subfacies from bottom to top,and subdivided into five fifth-order configuration elements and nine fourth-order configuration elements. There are five remaining oil distribution patterns of E31 reservoir,including remaining oil formed by fault sheltering,remaining oil in non-mainstream line detention zone,remaining oil formed by rhythmic differences between different configuration units, remaining oil formed by dam-permeability buffer zone and remaining oil formed by insufficient formation of injection wells. The results can provide a geological basis for the further exploration of Qigequan Oilfield.

Key words: ultra low permeability reservoir, pore assembly types, movable fluid saturation, main current throat radius, flooding type, Ordos Basin

中图分类号: 

  • TE122.2
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