非常规致密油藏(109 t)的地质特征:中国东北松辽盆地北部上白垩统青山口地层案例研究

IF 4.6 3区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
China Geology Pub Date : 2024-01-01 DOI:10.31035/cg2022072
Li-zhi Shi , Zhuo-zhuo Wang , Zhan-tao Xing , Shan Meng , Shuai Guo , Si-miao Wu , Li-yan Luo
{"title":"非常规致密油藏(109 t)的地质特征:中国东北松辽盆地北部上白垩统青山口地层案例研究","authors":"Li-zhi Shi ,&nbsp;Zhuo-zhuo Wang ,&nbsp;Zhan-tao Xing ,&nbsp;Shan Meng ,&nbsp;Shuai Guo ,&nbsp;Si-miao Wu ,&nbsp;Li-yan Luo","doi":"10.31035/cg2022072","DOIUrl":null,"url":null,"abstract":"<div><p>The Daqing exploration area in the northern Songliao Basin has great potential for unconventional oil and gas resources, among which the total resources of tight oil alone exceed 10<sup>9</sup> t and is regarded as an important resource base of Daqing oilfield. After years of exploration in the Qijia area, Songliao Basin, NE China, tight oil has been found in the Upper Cretaceous Qingshankou Formation. To work out tight oil’s geological characteristics, taking tight oil in Gaotaizi oil layers of the Upper Cretaceous Qingshankou Formation in northern Songliao Basin as an example, this paper systematically analyzed the geological characteristics of unconventional tight oil in Gao3 and Gao4 layers of the Qijia area, based on the data of the geological survey, well drilling journey, well logging, and test. It is that three sets of hydrocarbon source rocks (K<sub>2</sub><em>qn</em><sub>1</sub>, K<sub>2</sub><em>qn</em><sub>2+3</sub>, and K<sub>2</sub><em>n</em><sub>1</sub>) develop in the examined area, and exhibit excellent type I and II kerogens, high organic matter abundance, and moderate maturity. The reservoir is generally composed of thin-bedded mudstone, siltstone, and sandstone, and presents poor porosity (average 8.5 vol.%) and air permeability (average 4 mD). The main reservoir space primarily includes intergranular pores, secondary soluble pores, and intergranular soluble pores. Three types of orifice throats were identified, namely fine throat, extra-fine throat, and micro-fine throat. The siltstone is generally oil-bearing, the reservoirs with slime and calcium become worse oil-bearing, and the mudstone has no obvious oil-bearing characteristics. The brittleness indices of the sandstone in the tight oil reservoir range from 40% to 60%, and those of the mudstone range from 40% to 45%, indicating a better brittleness of the tight oil reservoir. Based on the study of typical core hole data, this paper gives a comprehensive evaluation of the properties of the tight oil and establishes a tight oil single well composite bar chart as well as the initial evaluation system with the core of properties in the tight oil reservoir. This study has theoretical guiding significance and practical application value for tight oil exploration and evaluation in the Qijia area.</p><p>©2024 China Geology Editorial Office.</p></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2096519224000557/pdfft?md5=245b4a0f2c429540a045a504102f83ae&pid=1-s2.0-S2096519224000557-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Geological characteristics of unconventional tight oil reservoir (109 t): A case study of Upper Cretaceous Qingshankou Formation, northern Songliao Basin, NE China\",\"authors\":\"Li-zhi Shi ,&nbsp;Zhuo-zhuo Wang ,&nbsp;Zhan-tao Xing ,&nbsp;Shan Meng ,&nbsp;Shuai Guo ,&nbsp;Si-miao Wu ,&nbsp;Li-yan Luo\",\"doi\":\"10.31035/cg2022072\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The Daqing exploration area in the northern Songliao Basin has great potential for unconventional oil and gas resources, among which the total resources of tight oil alone exceed 10<sup>9</sup> t and is regarded as an important resource base of Daqing oilfield. After years of exploration in the Qijia area, Songliao Basin, NE China, tight oil has been found in the Upper Cretaceous Qingshankou Formation. To work out tight oil’s geological characteristics, taking tight oil in Gaotaizi oil layers of the Upper Cretaceous Qingshankou Formation in northern Songliao Basin as an example, this paper systematically analyzed the geological characteristics of unconventional tight oil in Gao3 and Gao4 layers of the Qijia area, based on the data of the geological survey, well drilling journey, well logging, and test. It is that three sets of hydrocarbon source rocks (K<sub>2</sub><em>qn</em><sub>1</sub>, K<sub>2</sub><em>qn</em><sub>2+3</sub>, and K<sub>2</sub><em>n</em><sub>1</sub>) develop in the examined area, and exhibit excellent type I and II kerogens, high organic matter abundance, and moderate maturity. The reservoir is generally composed of thin-bedded mudstone, siltstone, and sandstone, and presents poor porosity (average 8.5 vol.%) and air permeability (average 4 mD). The main reservoir space primarily includes intergranular pores, secondary soluble pores, and intergranular soluble pores. Three types of orifice throats were identified, namely fine throat, extra-fine throat, and micro-fine throat. The siltstone is generally oil-bearing, the reservoirs with slime and calcium become worse oil-bearing, and the mudstone has no obvious oil-bearing characteristics. The brittleness indices of the sandstone in the tight oil reservoir range from 40% to 60%, and those of the mudstone range from 40% to 45%, indicating a better brittleness of the tight oil reservoir. Based on the study of typical core hole data, this paper gives a comprehensive evaluation of the properties of the tight oil and establishes a tight oil single well composite bar chart as well as the initial evaluation system with the core of properties in the tight oil reservoir. This study has theoretical guiding significance and practical application value for tight oil exploration and evaluation in the Qijia area.</p><p>©2024 China Geology Editorial Office.</p></div>\",\"PeriodicalId\":45329,\"journal\":{\"name\":\"China Geology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2024-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2096519224000557/pdfft?md5=245b4a0f2c429540a045a504102f83ae&pid=1-s2.0-S2096519224000557-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"China Geology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2096519224000557\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"China Geology","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2096519224000557","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

松辽盆地北部的大庆勘探区非常规油气资源潜力巨大,其中仅致密油资源总量就超过 109 吨,被誉为大庆油田的重要资源基地。中国东北松辽盆地齐家地区经过多年勘探,在上白垩统青山口地层中发现了致密油。为了研究致密油的地质特征,本文以松辽盆地北部上白垩统青山口组高台子油层致密油为例,根据地质调查、钻井历程、测井、测试等资料,系统分析了齐家地区高3、高4层非常规致密油的地质特征。该区发育三组烃源岩(K2qn1、K2qn2+3、K2n1),表现出优良的Ⅰ、Ⅱ类角砾岩,有机质丰度高,成熟度中等。储层一般由薄层泥岩、粉砂岩和砂岩组成,孔隙度(平均 8.5 Vol.%)和透气性(平均 4 mD)较差。主要储层空间主要包括晶间孔隙、次生可溶孔隙和晶间可溶孔隙。确定了三种孔喉类型,即细孔喉、特细孔喉和微细孔喉。粉砂岩含油性一般,含粘液和钙质的储层含油性变差,泥岩无明显含油特征。致密油藏砂岩的脆性指数在 40% 至 60% 之间,泥岩的脆性指数在 40% 至 45% 之间,表明致密油藏的脆性较好。本文在典型岩心孔数据研究的基础上,对致密油的性质进行了综合评价,建立了致密油单井综合柱状图,并初步建立了以致密油藏性质为核心的评价体系。该研究对齐家地区致密油勘探评价具有理论指导意义和实际应用价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Geological characteristics of unconventional tight oil reservoir (109 t): A case study of Upper Cretaceous Qingshankou Formation, northern Songliao Basin, NE China

The Daqing exploration area in the northern Songliao Basin has great potential for unconventional oil and gas resources, among which the total resources of tight oil alone exceed 109 t and is regarded as an important resource base of Daqing oilfield. After years of exploration in the Qijia area, Songliao Basin, NE China, tight oil has been found in the Upper Cretaceous Qingshankou Formation. To work out tight oil’s geological characteristics, taking tight oil in Gaotaizi oil layers of the Upper Cretaceous Qingshankou Formation in northern Songliao Basin as an example, this paper systematically analyzed the geological characteristics of unconventional tight oil in Gao3 and Gao4 layers of the Qijia area, based on the data of the geological survey, well drilling journey, well logging, and test. It is that three sets of hydrocarbon source rocks (K2qn1, K2qn2+3, and K2n1) develop in the examined area, and exhibit excellent type I and II kerogens, high organic matter abundance, and moderate maturity. The reservoir is generally composed of thin-bedded mudstone, siltstone, and sandstone, and presents poor porosity (average 8.5 vol.%) and air permeability (average 4 mD). The main reservoir space primarily includes intergranular pores, secondary soluble pores, and intergranular soluble pores. Three types of orifice throats were identified, namely fine throat, extra-fine throat, and micro-fine throat. The siltstone is generally oil-bearing, the reservoirs with slime and calcium become worse oil-bearing, and the mudstone has no obvious oil-bearing characteristics. The brittleness indices of the sandstone in the tight oil reservoir range from 40% to 60%, and those of the mudstone range from 40% to 45%, indicating a better brittleness of the tight oil reservoir. Based on the study of typical core hole data, this paper gives a comprehensive evaluation of the properties of the tight oil and establishes a tight oil single well composite bar chart as well as the initial evaluation system with the core of properties in the tight oil reservoir. This study has theoretical guiding significance and practical application value for tight oil exploration and evaluation in the Qijia area.

©2024 China Geology Editorial Office.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
China Geology
China Geology GEOLOGY-
CiteScore
7.80
自引率
11.10%
发文量
275
审稿时长
16 weeks
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信