冀中坳陷蠡县斜坡中北部油藏油水同出成因机制探讨

doi:10.3969/j.issn.1006-6535.2021.04.008

特种油气藏 ›› 2021, Vol. 28 ›› Issue (4): 55-61.DOI: 10.3969/j.issn.1006-6535.2021.04.008

冀中坳陷蠡县斜坡中北部油藏油水同出成因机制探讨

叶大帅^1,2, 丁文龙¹, 汤小琪², 胡延旭², 张钰景², 杜金³, 武跃伟², 何砚臣⁴

1.中国地质大学,北京 100083;
2.中国石油华北油田分公司,河北任丘 062552;
3.中油测井华北分公司,河北任丘 062552;
4.中国石油渤海钻探工程有限公司,新疆库尔勒 841000

收稿日期:2020-08-25 修回日期:2021-05-22 发布日期:2022-02-18
作者简介:叶大帅(1990—),男,工程师,2014年毕业于西北大学地质系,现为中国地质大学(北京)地质工程专业在读硕士研究生,主要从事石油地质研究工作。
基金资助:
国家科技重大专项“致密油不同尺度裂缝表征”(2016ZX05046-003-001);国家自然科学基金面上项目“渤海湾盆地济阳坳陷古近系陆相富有机质页岩裂缝研究”(41372139);中国石油重大科技专项“华北油田上产稳产800万吨关键技术研究与应用”(2014E-3507)

Exploration of the Genetic Mechanism of Oil-Water Coexistence in Oil Reservoirs in the North-Central Area of Lixian Slope in Jizhong Depression

Ye Dashuai^1,2, Ding Wenlong¹, Tang Xiaoqi², Hu Yanxu², Zhang Yujing², Du Jin³, Wu Yuewei², He Yanchen⁴

1. China University of Geosciences, Beijing 100083, China;
2. PetroChina Huabei Oilfield Company, Renqiu, Hebei 062552, China;
3. North China Branch, China Petroleum Logging Co., Ltd., Renqiu, Hebei 062552, China;
4. CNPC Bohai Drilling Engineering Company Limited, Korla, Xinjiang 841000, China

Received:2020-08-25 Revised:2021-05-22 Published:2022-02-18

摘要/Abstract

摘要： 为探讨冀中坳陷蠡县斜坡中北部油藏成因机制及油水分布特征,对油气系统关键时刻、密闭取心分析化验、测井资料等进行了系统分析。结果表明:蠡县斜坡油藏油水同出现象与油藏的充注程度和储层微观孔隙结构相关,研究区烃源岩热演化程度低,原油物性差,黏度高,加之生排烃晚,构造幅度低,油气在上浮过程中需要更长的运移路径和克服额外的流动阻力,导致目前油气正在向圈闭中充注;加之储层孔隙分选不均匀,微观非均质性较为严重,使得油气充注不充分且不均匀,油藏原生水饱和度高,常规试油或储层经压裂改造后导致油水同出。研究结果对研究区下步石油勘探及滚动评价具有重大的借鉴和指导意义。

关键词: 油水分布, 成因机制, 蠡县斜坡, 冀中坳陷

Abstract: In order to explore the genetic mechanism and oil-water distribution characteristics of oil reservoirs in the north-central Lixian slope in Jizhong Depression, critical moments of the petroleum system, sealed coring analysis, and logging data were systematically analyzed. The results showed that the oil-water coexistence in the Lixian slope reservoir was related to the charging degree of the reservoir and the microscopic pore structure of the reservoir; due to low thermal evolution of source rock in the study area, the poor physical properties and high viscosity of crude oil, late hydrocarbon generation and expulsion, and low tectonic amplitude, it was required to overcome additional flow resistance when the oil and gas floated through a longer migration path, resulting in oil and gas charging in the trap; in addition, the pores of the reservoir were not uniformly sorted and the micro-heterogeneity was more serious, resulting in insufficient and uneven oil and gas charging, high natural water saturation in the reservoir, and oil-water coexistence after conventional oil testing or reservoir fracturing stimulation. The study results can become great reference and guidance for further oil exploration and rolling evaluation in the study area.

Key words: oil-water distribution, genetic mechanism, Lixian slope, Jizhong Depression

中图分类号:

TE122.1

叶大帅, 丁文龙, 汤小琪, 胡延旭, 张钰景, 杜金, 武跃伟, 何砚臣. 冀中坳陷蠡县斜坡中北部油藏油水同出成因机制探讨[J]. 特种油气藏, 2021, 28(4): 55-61.

Ye Dashuai, Ding Wenlong, Tang Xiaoqi, Hu Yanxu, Zhang Yujing, Du Jin, Wu Yuewei, He Yanchen. Exploration of the Genetic Mechanism of Oil-Water Coexistence in Oil Reservoirs in the North-Central Area of Lixian Slope in Jizhong Depression[J]. Special Oil & Gas Reservoirs, 2021, 28(4): 55-61.

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冀中坳陷蠡县斜坡中北部油藏油水同出成因机制探讨

Exploration of the Genetic Mechanism of Oil-Water Coexistence in Oil Reservoirs in the North-Central Area of Lixian Slope in Jizhong Depression

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