注水开发过程中原油的生物降解与水洗作用

doi:10.11743/ogg20170322

石油与天然气地质 ›› 2017, Vol. 38 ›› Issue (3): 617-625.doi: 10.11743/ogg20170322

注水开发过程中原油的生物降解与水洗作用

常象春^1,2, 赵万春¹, 徐佑德³, 王涛⁴, 崔晶⁴

1. 山东科技大学山东省沉积成矿作用与沉积矿产重点实验室, 山东青岛 266590;
2. 海洋国家实验室海洋矿产资源评价与探测技术功能实验室, 山东青岛 266071;
3. 中国石化胜利油田勘探开发研究院, 山东东营 257001;
4. 中国石化胜利油田鲁明油田公司, 山东东营 257001

收稿日期:2015-11-16 修回日期:2017-01-22 出版日期:2017-06-28 发布日期:2017-07-10
第一作者简介:常象春(1974-),男,教授、博士生导师,油气地质与地球化学。E-mail:xcchang@sina.com。
基金项目:
国家自然科学基金项目（41272139）；山东省自然科学基金杰出青年基金项目（JQ201311）；山东科技大学科技计划项目（2015TDJH101）。

Biodegradation and water washing effects on oil during water flooding

Chang Xiangchun^1,2, Zhao Wanchun¹, Xu Youde³, Wang Tao⁴, Cui Jing⁴

1. Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao, Shandong 266590, China;
2. Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong 266071, China;
3. Research Institute of Petroleum Exploration and Development, SINOPEC Shengli Oilfield Company, Dongying, Shandong 257001, China;
4. Luming Oilfield Branch of SINOPEC Shengli Oilfield Company, Dongying, Shandong 257001, China

Received:2015-11-16 Revised:2017-01-22 Online:2017-06-28 Published:2017-07-10

摘要/Abstract

摘要： 注水开发是提高原油采收率的常用方法。为了探索注水开发过程中原油遭受的次生蚀变作用和组分变化规律，对典型注水开发的济阳坳陷曲堤油田曲9油藏进行了动态跟踪和地球化学对比分析。研究结果表明，随着注水开发过程的推进，原油族组成中饱和烃相对含量呈升高趋势，而芳烃相对含量呈降低趋势，体现出典型的水洗作用效应。Pr/nC₁₇和Ph/nC₁₈比值呈现出先降低后升高，或先升高后降低的复杂变化，推测不仅受到水洗作用或生物降解的影响，还有类似地质色层效应的加入。C₁₅8β（H）-补身烷/C₁₆8β（H）-升补身烷逐渐升高，指向生物降解抑或水洗作用的蚀变，尚无法区分。三环萜烷/17α（H）-藿烷、C₂₇重排/C₂₇规则甾烷和甾烷/17α（H）-藿烷均呈现明显增高趋势，C₃₁藿烷22R/C₃₀藿烷（C₃₁R/C₃₀H）则呈现幅度较小的降低趋势，均指示生物降解作用的结果。甲基菲指数（MPI₁）、二苯并噻吩/菲（DBT/P）、C₂₆三芳甾烷20S/（20S+20R）与C₂₆/C₂₈三芳甾烷（20S）基本保持不变，表明水驱过程中三芳甾烷并不受影响，菲系列和二苯并噻吩系列未表现出显著的水溶性或抗生物降解能力差异。

关键词: 注水开发, 水洗作用, 生物降解, 次生变化, 原油, 油藏地球化学, 曲堤油田, 济阳坳陷

Abstract: Water flooding is one of the most commonly used methods for enhancing oil recovery.About 36 oil samples from 12 waterflooded wells in Quti-9 oil reservoir of Jiyang Depression were investigated for dynamic tracking and geochemical measurements,to characterize their quality alterations and component changing patterns during the water flooding production.The results show increasing saturates and decreasing aromatics in the samples through the progress of water flooding,the typical effect of water washing during water flooding.The Pr/n-C₁₇ and Ph/n-C₁₈ ratios change in two different ways:decrease first and increase later or increase first and decrease later,indicating an effect of a strata chromatography adsorption,along with the water washing effect or biodegradation.The increasing C₁₅8β(H)-drimane/C₁₆8β(H)-homodrimane ratio can equally suggest an alteration by biodegradation or water washing.The obvious increase of tricyclic terpanes/17α(H)-hopane,C₂₇-diasterane/C₂₇-sterane,sterane/17α(H)-hopane ratios,and subtle decrease of C₃₁R/C₃₀H ratios,all indicate biodegradation.The MPI₁,and DBT/P,C₂₈TAS 20S/(20S+20R) and C₂₆-/C₂₈ TAS(20S) ratios are constant,suggesting triaromatic steroid(TAS) is unaffected by water flooding.And the phenanthrene and dibenzothiophene show no clear signs of difference in solubility or biodegradation during the waterflooding.

Key words: water flooding, water washing, biodegradation, petroleum alteration, crude oil, reservoir geochemistry, Quti oilfield, Jiyang Depression

中图分类号:

TE122.1

常象春,赵万春,徐佑德,等. 注水开发过程中原油的生物降解与水洗作用[J]. 石油与天然气地质, 2017, 38(3): 617-625. doi: 10.11743/ogg20170322 Chang Xiangchun,Zhao Wanchun,Xu Youde,et al. Biodegradation and water washing effects on oil during water flooding[J]. Oil & Gas Geology, 2017, 38(3): 617-625. doi: 10.11743/ogg20170322

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注水开发过程中原油的生物降解与水洗作用

Biodegradation and water washing effects on oil during water flooding

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