准噶尔盆地南缘页岩气形成条件与有利区预测

王怡然; 吴天琦; 田继军; 杨曙光; 王长江; 张国庆; 韦波; 李乐; 樊奇

准噶尔盆地南缘页岩气形成条件与有利区预测

1. 新疆大学地质与矿业工程学院, 新疆乌鲁木齐 830046;
2. 西南石油大学地球科学与技术学院, 四川成都 510760;
3. 新疆煤田地质局, 新疆乌鲁木齐 830001;
4. 中国石油测井公司油气评价中心, 陕西西安 710077

基金项目:

新疆维吾尔自治区科技支撑项目(201333108)资助。

详细信息

作者简介:
王怡然,男,1990年生,硕士生,从事沉积与非常规能源的研究工作;E-mail:xjuwyr@sina.cn。

通讯作者:
田继军,男,1978年生,副教授,博士,从事沉积与非常规能源的研究工作

中图分类号: TE132.2
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出版历程
- 收稿日期: 2014-12-25
- 修回日期: 2015-04-15
- 网络出版日期: 2023-09-25
- 刊出日期: 2016-02-24

Formation conditions and favorable exploration zones of shale gas on the southern margin of Junggar Basin

1. School of Geological and Mining Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China;
2. School of Earth Science & Technology, Southwest Petroleum University, Chengdu Sichuan 510760, China;
3. Xinjiang Bureau of Coal Geology, Urumqi 830001, Xinjiang, China;
4. Oil and Gas Evaluation Center, Chinese Oil Well Logging Company, Xi'an 710077, Shaanxi, China

Funds:

Supported by Xijiang Science & Technology Pillar Program(No. 201333108).

摘要

摘要: 通过对准噶尔盆地南缘泥页岩分布情况、厚度、面积、总有机碳含量、热演化程度、有机质类型、矿物岩石成分等因素的分析,确定了准噶尔盆地南缘侏罗系八道湾组、三工河组和西山窑组、二叠系芦草沟组、红雁池组以及石炭系是页岩气发育的有利层位。经过对有利层位的页岩气富集条件分析,并利用镜质体反射率(Ro)等值线、泥岩厚度等值线和总有机碳含量(TOC)等值线进行叠加的分析方法,最终确定霍玛吐背斜带西北缘、沙湾凹陷和莫南凸起三者过渡区域的侏罗纪地层,阜康凹陷与阜康断裂带过渡区域的侏罗纪地层,柴窝堡坳陷达坂城凹陷和永丰凹陷二叠纪地层埋藏较浅处,以及齐古断褶带石炭纪地层埋藏较浅处等4处为页岩的有利发育区。
- 页岩气 /
- 准噶尔盆地南缘 /
- 形成条件 /
- 有利发育区 /
- 地球化学特征
Abstract: Based on analyzing the distribution, thickness, area, total organic carbon content, thermal evolution, type of organic matter and petrographic composition of the shale on the southern margin of Junggar Basin, the authors hold that the Jurassic Badaowan, Sangonghe and Xishanyao Formation, the Permian Lucaogou Formation, Hongyanchi Formation and the Carboniferous strata are favorable formations for shale gas exploration. Through an analysis of enrichment conditions of favorable horizons of shale gas and by using the method of superimposing vitrinite reflectance (Ro) isoline, mudstone thickness isoline and total organic carbon content (TOC) contour, the authors determined that the Jurassic strata of the transition region of the northwestern margin of Homato anticline belt, Shawan sag and Monan convex, the Jurassic strata of transition region of Fukang sag and Fukang fracture belt, the Permian strata of Dabancheng sag and Yongfeng sag with shallow buried depth in Chaiwopu depression and the Carboniferous strata of Qigu fault fold zone with shallow buried depth ae favorable places for shale gas exploration.
- shale gas /
- southern Margin of Junggar Basin /
- formation conditions /
- favorable exploration area /
- geochemical characteristics

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图 1 准噶尔盆地南缘构造分区图

1—构造分区线; 2—隆起带; 3—凹陷带; 4—分界线; 5—工业油流井; 6—正试井; 7—探明石油储量; 8—探明天然气储量; 9—断层; 10—地层剥蚀线

Figure 1. Geographical divisions of southern Margin of Junggar Basin

1-Tectonic division line; 2-Uplift zone; 3-Sag zone; 4-Division line; 5-Industrial oil well; 6-Test well; 7-Proven oil reserves; 8-Proven reserves of natural gas; 9-Fault; 10-Strata denudation line

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图 2 准噶尔盆地南缘中—下侏罗统泥页岩厚度等值线图

Figure 2. Contour map of the thickness of lower-middle Jurassic shale on the southern margin of Junggar Basin

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图 3 准噶尔盆地南缘石炭统泥页岩厚度图(据文献[5]修改)

Figure 3. Contour map of the thickness of Carboniferous shale on the southern margin of Junggar Basin (modified after reference [5])

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图 4 准噶尔盆地南缘中—下侏罗统泥页岩TOC等值线图

Figure 4. Contour map of the TOC value of lower-middle Jurassic shale from the southern margin of Junggar Basin

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图 5 准噶尔盆地侏罗系烃源岩三端元显微组分组成图(据文献[8]修改)

Figure 5. Composition of 3−end−mumber maceral of Jurassic hydrocarbon source rocks on the southern margin of Junggar Basin (modified after reference [8])

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图 6 准噶尔盆地南缘中—下侏罗统泥页岩镜质组反射率等值线图(据文献[8]修改)

Figure 6. Contour map of the vitrinite reflectance of lower-middle Jurassic shale on the southern margin of Junggar Basin (modified after reference [8])

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图 7 上二叠统泥页岩有机质丰度直方图(据文献[10]修改)

Figure 7. Histogram of the organic matter abundance of upper Permian shale on the southern margin of Junggar Basin (modified after reference [10])

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图 8 准噶尔盆地南缘泥页岩孔隙特征图

a—奇台县煤矿样品孔隙特征; b—气煤1 号井样品孔隙特征

Figure 8. Shale pore features of the southern margin of Junggar Basin

a-Qitai County coal sample pore characteristics; b-Qimei No. 1 well sample pore characteristics

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表 1 准噶尔盆地南缘岩石样品有机碳分析数据

Table 1 Organic carbon analytical data of rock samples from the southern margin of Junggar Basin

样品编号	产地	层位	岩性	TOC	硫含量
样品编号	产地	层位	岩性	/%	/%
奇台县煤矿-①	奇台县煤矿	西山窑组	暗色泥岩	3.74	0.0277
气煤1号井-①	准南煤田	西山窑组	暗色泥岩	0.528	0.0194
气煤1号井-②	准南煤田	西山窑组	暗色泥岩	1.24	0.222

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表 2 准噶尔盆地南缘中—下侏罗统烃源岩总有机碳含量

Table 2 Total organic carbon content of lower–middle Jurassic hydrocarbon source rocks on the southern margin of Junggar Basin

层位	地层时代	泥/页岩类型	TOC/%
层位	地层时代	泥/页岩类型	范围	均值(样品个数)	煤系均值( $\frac{{N \times \sum {{H_{Ni}} \times TO{C_{Ni}}} }}{H}$ )	此次新测数
西山窑组	J₂x	泥岩	0.40~5.87	1.42(84)	1.55	10
		炭质泥岩	6.23~37.40	18.19(40)
三工河组	J₂s	泥岩	0.40~3.51	1.04(128)	1.32
		炭质泥岩	6.03~35.69	17.04(12)
八道湾组	J₂b	泥岩	0.42~5.86	1.68(187)	1.73
		炭质泥岩	6.29~39.96	21.14(47)
注: N—统计井数; H_Ni—对应井不同层段厚度; TOC_Ni—对应井不同层段TOC值; H—对应井泥/页岩总厚度; 此次统计数据井数为20口。

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表 3 准噶尔盆地南缘全岩X衍射分析数据

Table 3 X−ray diffraction analysis data of whole rock on the southern margin of Junggar Basin

样品编号（岩性）	层位	全岩定量分析%
样品编号（岩性）	层位	粘土总量	石英	钾长石	斜长石	方解石	白云石	菱铁矿
24-21-①	西山窑组	25	75
奇台县煤矿-①	西山窑组	52	42	3	3
准南煤田气媒1号井-①	西山窑组	17	36		7		36	4
大黄山剖面-①（钙质页岩）	芦草沟组	3	62			35
大黄山剖面-②（钙质页岩）	芦草沟组	63	15			22
红雁池剖面-①（钙质页岩）	芦草沟组	75	10			15
红雁池剖面-②（细粒钙质岩屑砂岩）	芦草沟组	47	46		7

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