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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第47卷

期数:

2025年第02期

页码:

216-229

栏目:

沉积地质与油气勘探

出版日期:

2025-03-15

文章信息/Info

Title:

Oil-bearing Evaluation and Favorable Interval Optimization of Fengcheng Formation in the Western Hala'alate of Junggar Basin, China

文章编号:

1672-6561(2025)02-0216-14

作者:

曹婷婷¹; 2; 3*; 张彩明¹; 2; 3; 宋振响¹; 2; 3; 宋梅远⁴; 孙中良¹; 2; 3; 徐二社¹; 2; 3

(1. 中国石化石油勘探开发研究院无锡石油地质研究所,江苏 无锡 214126; 2. 页岩油气富集机理与高效开发全国重点实验室,江苏 无锡 214126; 3. 中国石化油气成藏重点实验室,江苏 无锡 214126; 4. 中国石化胜利油田分公司勘探开发研究院,山东 东营 257015)

Author(s):

CAO Ting-ting¹; 2; 3*;  ZHANG Cai-ming¹; 2; 3;  SONG Zhen-xiang¹; 2; 3;  SONG Mei-yuan⁴;  SUN Zhong-liang¹; 2; 3;  XU Er-she¹; 2; 3

(1. Wuxi Research Institute of Petroleum Geology, Research Institute of Petroleum Exploration and Development, SINOPEC, Wuxi 214126, Jiangsu, China; 2. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development, Wuxi 214126, Jiangsu, China; 3. Key Laboratory of Hydrocarbon Accumulation Mechanisms, SINOPEC, Wuxi 214126, Jiangsu, China; 4. Research Institute of Petroleum Exploration and Development, Shengli Oilfield Company, SINOPEC, Dongying 257015, Shandong, China)

关键词:

页岩油;  风城组;  含油性;  储集性;  有利层段;  准噶尔盆地

Keywords:

shale oil;  Fengcheng Formation;  oil-bearing;  reservoir capability;  favorable interval;  Junggar Basin

分类号:

P618.13

DOI:

10.19814/j.jese.2024.07019

文献标志码:

A

摘要:

为了开展哈拉阿拉特山(简称“哈山”)地区风城组页岩油勘探有利层段的评价,对钻井岩芯和岩屑样品开展热解、基质孔隙度与渗透率、压汞与氮吸附、氩离子抛光扫描电镜、X射线衍射全岩矿物等分析,探讨了哈山西段风城组富有机质页岩含油性与储集性。结果表明:哈山西段风城组发育优质的富有机质页岩层系,有机质类型好、丰度高,现正处于生油阶段,具备生成大规模页岩油的物质基础; 储集空间主要发育粒间孔和微裂缝,平均基质孔隙度介于1.65%～8.72%,基质渗透率介于(0.008～17 355.000)×10³ μm²,孔径分布以介孔和宏孔为主,为页岩油的富集提供了有效的储集空间; 脆性矿物平均含量(质量分数,下同)介于50.8%～56.1%,具备良好的可压裂性。轻烃校正后的数据显示,风一段与风二段平均游离油含量(S₁)大于1.0×10^-3,油饱和度指数(OSI)平均值大于100×10^-3,证实其具有较好的含油性。其中,风二段云质泥岩与泥质云岩具有宏孔占比较高,微裂缝、粒间孔、粒内溶蚀孔等孔隙结构较为发育,脆性指数高,含油性好的特点,是页岩油勘探的有利层段。

Abstract:

In order to evaluate the favorable intervals for shale oil exploration in Fengcheng Formation in Hala'alate area, the drilling core and cuttings samples were analyzed by pyrolysis, matrix porosity and permeability, mercury intrusion and nitrogen adsorption, SEM, and XRD. The oil-bearing property, reservoir property and compressibility of organic-rich shale of Fengcheng Formation in the western Hala'alate were discussed. The results show that Fengcheng Formation in the western Hala'alate is a set of high-quality organic-rich shale, with good type and abundance of organic matter, indicating good hydrocarbon potential; based on the reservoir micro-characteristics, the intergranular pores and microfractures are the main reservoir space for shale oil enrichment in Fengcheng Formation, with the porosity of 1.65%-8.72% and matrix permeability of(0.008-17 355.000)×10³ μm², respectively; the average content of brittle minerals is 50.8%-56.1%, with good frangibility; the corrected S₁ of the first and second member of Fengcheng Formation are greater than 1.0×10^-3, and the corrected OSI is greater than 100×10^-3, revealing better oil-bearing characteristics; the dolomitic mudstone and argillaceous dolomite in the second member of Fengcheng Formation have high proportion of macropores, well-developed pore structures such as microfractures, intergranular pore and intragranular dissolution pores, and relatively high OSI and brittleness index, which are favorable layers for shale oil exploration.

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备注/Memo

备注/Memo:

收稿日期:2024-07-16; 修回日期:2025-01-06
基金项目:国家自然科学基金项目(42090022); 中国石化科技部项目(KLP23017)
*通信作者:曹婷婷(1986-),女,河南上蔡人,副研究员,E-mail:ctt.syky@sinopec.com。

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