吉木萨尔凹陷二叠系芦草沟组一段沉积期古地貌特征及有利储层分布

doi:10.12108/yxyqc.20240113

岩性油气藏 ›› 2024, Vol. 36 ›› Issue (1): 136–144.doi: 10.12108/yxyqc.20240113

吉木萨尔凹陷二叠系芦草沟组一段沉积期古地貌特征及有利储层分布

邓远¹, 陈轩², 覃建华¹, 李映艳¹, 何吉祥¹, 陶鑫², 尹太举², 高阳³

1. 中国石油新疆油田公司勘探开发研究院, 新疆克拉玛依 834000;
2. 长江大学地球科学学院, 武汉 430100;
3. 中海石油 (中国) 有限公司深圳分公司广东深圳 518000

收稿日期:2022-10-08 修回日期:2022-12-09 出版日期:2024-01-01 发布日期:2024-01-02
第一作者:邓远(1990-),男,博士,高级工程师,主要从事非常规油气开发地质方面的研究工作。地址:(834000)新疆克拉玛依市克拉玛依区准噶尔路29号。Email:dengyuan_geo@163.com。
通信作者: 陈轩(1983-),男,博士,教授,主要从事沉积学、油气储层地质方面的教学与研究工作。Email:chenxuanwolf@163.com。
基金资助:
国家自然科学基金项目“吉木萨尔凹陷芦草沟组页岩油甜点沉积动力过程模拟”（编号：42072119）、中国石油股份公司重大科技专项“陆相中高成熟度页岩油勘探开发关键技术研究与应用”（编号：2019E-26）及中国石油集团重大科技专项“吉木萨尔页岩油国家级示范区水平井效益开发关键工程技术集成与试验”（编号：2020F-50）联合资助。

Paleogeomorphology and favorable reservior distribution of the first member of Permian Lucaogou Formation in Jimsar Sag

DENG Yuan¹, CHEN Xuan², QIN Jianhua¹, LI Yingyan¹, HE Jixiang¹, TAO Xin², YIN Taiju², GAO Yang³

1. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China;
2. School of Geosciences, Yangtze University, Wuhan 430100, China;
3. Shenzhen Branch, CNOOC China Limited, Shenzhen 518000, Guangdong, China

Received:2022-10-08 Revised:2022-12-09 Online:2024-01-01 Published:2024-01-02

摘要/Abstract

摘要： 依据岩心、测井及地震等资料，对吉木萨尔凹陷二叠系芦草沟组一段沉积期古地貌进行了恢复，并预测了其有利储层分布。研究结果表明： ①吉木萨尔凹陷芦草沟组一段发育丰富的粒序层理、块状层理、爬升沙纹层理及植物碎片，频繁出现的对偶粒序及内部侵蚀面沉积构造为湖泊异重流成因，进一步识别出水道、水下天然堤、朵叶体及侧缘4种微相类型，其中水道和朵叶体为有利储集微相。②芦草沟组一段沉积期，吉木萨尔凹陷古地貌整体呈“南低北高、中部低东西高”的沉积格局，低部位发育古沟槽、古低凸起及古低洼3类微古地貌单元。古沟槽内水道储层为加积叠置、厚层状充填，古低洼区内朵叶体为进积—侧积叠置、薄层席状披覆，古低凸起分割异重流沉积；古斜坡区异重流欠发育。③吉木萨尔凹陷南部发育3个异重流供给水道区。异重流水道向北进积，主水流线分散成多支，在水道末端形成多个连片叠置的朵叶体。

关键词: 古地貌, 页岩油, 异重流, 朵叶体, 水道, 芦草沟组, 二叠系, 吉木萨尔凹陷

Abstract: Based on core, logging and seismic data, the paleogeomorphology of the first member of Permian Lucaogou Formation in Jimsar Sag was restored, and the distribution of favorable reservoirs was predicted. The results show that:(1) The reservoirs of the first member of Lucaogou Formation in Jimsar Sag are rich in the sedimentary structures of massive bedding, climbing ripple bedding and plant clasts, and inversely-graded lower part and normallygraded upper part with internal scour surface, which can be interpreted as the origin of lacustrine hyperpycnite. The main microfacies are channel, levee, lobe and margin, among which channel and lobe are favorable reservoirs.(2) During the depositional period of the first member of Lucaogou Formation, the paleogeomorphology of Jimsar Sag showed a pattern of "low in the south and high in the north, and low in the middle and high in the east and west". Three kinds of micro-paleogeomorphology units developed in low position:paleo-groove, paleo-low uplift and paleo-platform. In the paleo-groove, the reserviors present a stacking pattern of aggradation and thick layer filling. The reserviors in palaeo-platform are progradational and lateral stacking pattern with thin layer sheet distribution. The paleo-low uplifts separate the hyperpycnite lobes. The paleo-slope area is lack of hyperpycnite. (3) There are three hyperpycnal channles in southern Jimsar Sag. The channels prograde northward, and the main channles are dispersed into multiple branches, forming multiple overlapping lobes at the end of channles.

Key words: paleogeomorphology, shale oil, hyperpycnites, lobe, channel, Lucaogou Formation, Permian, Jimsar Sag

中图分类号:

TE121.3

邓远, 陈轩, 覃建华, 李映艳, 何吉祥, 陶鑫, 尹太举, 高阳. 吉木萨尔凹陷二叠系芦草沟组一段沉积期古地貌特征及有利储层分布[J]. 岩性油气藏, 2024, 36(1): 136–144.

DENG Yuan, CHEN Xuan, QIN Jianhua, LI Yingyan, HE Jixiang, TAO Xin, YIN Taiju, GAO Yang. Paleogeomorphology and favorable reservior distribution of the first member of Permian Lucaogou Formation in Jimsar Sag[J]. Lithologic Reservoirs, 2024, 36(1): 136–144.

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吉木萨尔凹陷二叠系芦草沟组一段沉积期古地貌特征及有利储层分布

Paleogeomorphology and favorable reservior distribution of the first member of Permian Lucaogou Formation in Jimsar Sag

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