四川盆地东部中上寒武统洗象池群油气成藏条件与主控因素

孙自明; 孙炜; 林娟华; 马强

doi:10.11781/sysydz202106933

四川盆地东部中上寒武统洗象池群油气成藏条件与主控因素

doi: 10.11781/sysydz202106933

中国石化石油勘探开发研究院, 北京 102206

基金项目:

中国石化科技部项目 P19022-3

中国石化科技部项目 P21042-2

详细信息

作者简介:
孙自明(1964-), 男, 博士, 高级工程师, 从事油气勘探研究。E-mail: sunzm.syky@sinopec.com

中图分类号: TE122.3
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出版历程
- 收稿日期: 2021-01-27
- 修回日期: 2021-09-14
- 刊出日期: 2021-11-28

Hydrocarbon accumulation conditions and main controlling factors of the Middle-Upper Cambrian Xixiangchi Group in the eastern Sichuan Basin

SINOPEC Petroleum Exploration and Production Research Institute, Beijing 102206, China

摘要

摘要: 以露头和钻井资料为基础，在对四川盆地东部中上寒武统洗象池群油气成藏条件分析的基础上，结合钻井勘探成果，探讨油气成藏主控因素，明确了洗象池群的有利勘探方向。洗象池群储层以泥晶和粉晶白云岩为主，储集空间主要为白云石晶间孔、晶间溶孔和溶洞等，储层品质一般较差；纵向上，洗象池群具有下寒武统筇竹寺组和上奥陶统五峰组—下志留统龙马溪组2套烃源岩；志留系泥页岩和下奥陶统泥质岩类可分别作为洗象池群的区域盖层和局部盖层；优质储层是洗象池群油气成藏的必要前提，源—储配置样式及其有效性是油气成藏的关键；尽管研究区洗象池群具有上、下2套烃源岩供烃的可能，但受中寒武统膏盐岩层的阻隔，下伏下寒武统筇竹寺组烃源岩生成的油气难以向上运移到洗象池群聚集成藏，而盐上层系发育的一系列断背斜空间上易于构造出五峰组—龙马溪组烃源岩与洗象池群储层有效的源—储配置形式，有利于洗象池群形成“新生古储”油气藏。
- 主控因素 /
- 源—储配置 /
- 油气成藏条件 /
- 洗象池群 /
- 寒武系 /
- 四川盆地东部
Abstract: The petroleum geological elements and main controlling factors of the Middle-Upper Cambrian Xixiangchi Group in the eastern Sichuan Basin were systematically analyzed on the basis of geological outcrops and drilling data. Results showed that the reservoir lithology of the Xixiangchi Group was mainly micritic and silt-crystal dolomites, and the reservoir space was dominated by dolomite inter-crystalline pores, inter-crystalline dissolved pores and karst caves, etc., at the meantime, the reservoir quality is generally poor. The Xixiangchi Group was vertically composed by two sets of source rocks strata: the underlying Lower Cambrian Qiongzhusi Formation and the overlying Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation. The Silurian shale and the Lower Ordovician argillaceous rocks acted as regional and local cap rocks of the Xixiangchi Group. High-quality reservoirs are the necessary prerequisite for hydrocarbon accumulation in the Xixiangchi Group, and the source-reservoir spatial configuration and its effectiveness are the key factors to hydrocarbon accumulation. Though the Xixiangchi Group could have been charged by natural gas generated from the underlying and the overlying source rocks, it is difficult for the natural gas generated from the underlying source rocks to migrate up to the Xixiangchi Group due to the barrier of the Cambrian gypsum layers. However, the faulted anticlines developed over the Cambrian gypsum layer were favorable for hydrocarbon accumulation because they could change and construct a series of effective source-reservoir spatial configuration between the Wufeng-Longmaxi source rocks and the Xixiangchi reservoirs, and finally formed reservoirs with "young source in old reservoir" in the Xixiangchi Group.
- main controlling factor /
- source-reservoir spatial configuration /
- hydrocarbon migration and accumulation element /
- Xixiangchi Group /
- Cambrian /
- eastern Sichuan Basin

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图 1 四川盆地构造区划

据参考文献[21]修改。

Figure 1. Structural divisions of Sichuan Basin

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图 2 四川盆地东部下古生界地层综合柱状图

Figure 2. Comprehensive stratigraphic histogram of the Lower Palaeozoic strata in eastern Sichuan Basin

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图 3 四川盆地东部及邻区上奥陶统五峰组—下志留统龙马溪组烃源岩等厚图

Figure 3. Isogram of source rocks of Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in the eastern Sichuan Basin and its periphery

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图 4 四川盆地建深1井寒武系洗象池群孔隙度(a)和渗透率(b)频率分布

Figure 4. Frequency distribution of porosity (a) and permeability (b) of Xixiangchi Group in well Jianshen 1, Sichuan Basin

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图 5 四川盆地东部及邻区寒武系洗象池群岩相古地理

据参考文献[5, 8, 13, 16-18]修改。

Figure 5. Lithofacies paleogeographic map of Xixiangchi Group in the eastern Sichuan Basin and its periphery

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图 6 四川盆地东部寒武系洗象池群沉积构造、溶蚀现象与裂缝

a.粉晶白云岩，半充填和全充填溶蚀孔洞，焦石1井，2 934.39~2 934.89 m；b.薄层砾屑白云岩，底部发育2~3个冲刷面，仁怀坛长镇；c.灰色与浅灰色厚层粉晶白云岩，冲刷面，习水永安镇；d.中厚层白云岩，溶蚀溶孔发育，仁怀坛长镇；e.灰色细粉晶白云岩，发育岩溶角砾岩，平桥1井，3 122.85~3 140.81 m；f.粉晶白云岩和微裂缝，裂缝为白云石充填，平桥1井，3 135.21 m

Figure 6. Sedimentary structures, karstification and fractures of the Xixiangchi Group in the eastern Sichuan Basin

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图 7 四川盆地东部平桥构造气藏成藏模式

.高台组；.洗象池群；O₁t-O₃l.下奥陶统桐梓组—上奥陶统临湘组；O₃w—S.上奥陶统五峰组—志留系
1.含膏盐岩；2.上奥陶统五峰组—下志留统龙马溪组烃源岩；3.洗象池群气藏；4.逆断层；5.油气运移方向

Figure 7. Hydrocarbon migration and accumulation pattern of Pingqiao gas-bearing structure in the eastern Sichuan Basin

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参考文献(27)

[1]	邹才能, 杜金虎, 徐春春, 等. 四川盆地震旦系-寒武系特大型气田形成分布、资源潜力及勘探发现[J]. 石油勘探与开发, 2014, 41(3): 278-293. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201403006.htm ZOU Caineng, DU Jinhu, XU Chunchun, et al. Formation, distribution, resource potential and discovery of the Sinian-Cambrian giant gas field, Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2014, 41(3): 278-293. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201403006.htm
[2]	杜金虎, 邹才能, 徐春春, 等. 川中古隆起龙王庙组特大型气田战略发现与理论技术创新[J]. 石油勘探与开发, 2014, 41(3): 268-277. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201403005.htm DU Jinhu, ZOU Caineng, XU Chunchun, et al. Theoretical and technical innovations in strategic discovery of a giant gas field in Cambrian Longwangmiao Formation of central Sichuan paleo-uplift, Sichuan Basin[J]. Petroleum Exploration and Development, 2014, 41(3): 268-277. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201403005.htm
[3]	魏国齐, 杨威, 谢武仁, 等. 四川盆地震旦系-寒武系大气田形成条件、成藏模式与勘探方向[J]. 天然气地球科学, 2015, 26(5): 785-795. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201505002.htm WEI Guoqi, YANG Wei, XIE Wuren, et al. Formation conditions, accumulation models and exploration direction of large gas fields in Sinian-Cambrian, Sichuan Basin[J]. Natural Gas Geoscience, 2015, 26(5): 785-795. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201505002.htm
[4]	林怡, 钟波, 陈聪, 等. 川中地区古隆起寒武系洗象池组气藏成藏控制因素[J]. 成都理工大学学报(自然科学版), 2020, 47(2): 150-158. https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG202002003.htm LIN Yi, ZHONG Bo, CHEN Cong, et al. Geological characteristics and controlling factors of gas accumulation of Xixiangchi Formation in central Sichuan Basin, China[J]. Journal of Chengdu University of Technology (Science & Technology Edition), 2020, 47(2): 150-158. https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG202002003.htm
[5]	石书缘, 王铜山, 刘伟, 等. 四川盆地寒武系洗象池组储层特征及天然气勘探潜力[J]. 天然气地球科学, 2020, 31(6): 773-785. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX202006003.htm SHI Shuyuan, WANG Tongshan, LIU Wei, et al. Reservoir characteristic and gas exploration potential in Cambrian Xixiangchi Formation of Sichuan Basin[J]. Natural Gas Geoscience, 2020, 31(6): 773-785. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX202006003.htm
[6]	徐世琦, 代宗仰, 蒋小光, 等. 古隆起区带寒武系洗象池群成藏条件与勘探前景分析[J]. 天然气勘探与开发, 2006, 29(4): 4-8. https://www.cnki.com.cn/Article/CJFDTOTAL-TRKT200604002.htm XU Shiqi, DAI Zongyang, JIANG Xiaoguang, et al. Oil and gas exploration prospects of Cambrian Xixiangchi Member in palaeo-uplift zone[J]. Natural Gas Exploration and Development, 2006, 29(4): 4-8. https://www.cnki.com.cn/Article/CJFDTOTAL-TRKT200604002.htm
[7]	贾鹏, 李明, 卢远征, 等. 四川盆地寒武系洗象池群层序地层划分及层序地层格架的建立[J]. 地质科技情报, 2017, 36(2): 119-127. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201702015.htm JIA Peng, LI Ming, LU Yuanzheng, et al. Sequence stratigraphic subdivision and establishment of sequence stratigraphic framework in the Cambrian Xixiangchi Group of Sichuan Basin[J]. Geological Science and Technology Information, 2017, 36(2): 119-127. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201702015.htm
[8]	李伟, 樊茹, 贾鹏, 等. 四川盆地及周缘地区中上寒武统洗象池群层序地层与岩相古地理演化特征[J]. 石油勘探与开发, 2019, 46(2): 226-240. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201902005.htm LI Wei, FAN Ru, JIA Peng, et al. Sequence stratigraphy and lithofacies paleogeography of Middle-Upper Cambrian Xixiangchi Group in Sichuan Basin and its adjacent area, SW China[J]. Petroleum Exploration and Development, 2019, 46(2): 226-240. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201902005.htm
[9]	梅冥相. 上扬子区寒武系娄山关群白云岩层序地层格架及其古地理背景[J]. 古地理学报, 2007, 9(2): 117-132. https://www.cnki.com.cn/Article/CJFDTOTAL-GDLX200702001.htm MEI Mingxiang. Sequence stratigraphic framework and its palaeogeographic setting for the Loushanguan Group dolostones of Cambrian in Upper Yangtze region[J]. Journal of Palaeogeography, 2007, 9(2): 117-132. https://www.cnki.com.cn/Article/CJFDTOTAL-GDLX200702001.htm
[10]	井攀, 黄加力, 百成钢, 等. 四川盆地洗象池组层序地层及沉积相研究现状[J]. 山东化工, 2016, 45(11): 65-66. https://www.cnki.com.cn/Article/CJFDTOTAL-SDHG201611027.htm JING Pan, HUANG Jiali, BAI Chenggang, et al. The present research situation of sequence and sedimentary facies of Xixiangchi Formation of Sichuan Basin[J]. Shandong Chemical Industry, 2016, 45(11): 65-66. https://www.cnki.com.cn/Article/CJFDTOTAL-SDHG201611027.htm
[11]	张帆, 文应初, 强子同. 四川盆地寒武系洗象池群碳酸盐岩向上变浅沉积序列[J]. 矿物岩石地球化学通报, 1999, 18(1): 23-28. https://www.cnki.com.cn/Article/CJFDTOTAL-KYDH901.006.htm ZHANG Fan, WEN Yingchu, QIANG Zitong. Upward shallowing sequences of Cambrian carbonate rocks in the Xixiangchi Group in the Sichuan Basin[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 1999, 18(1): 23-28. https://www.cnki.com.cn/Article/CJFDTOTAL-KYDH901.006.htm
[12]	王瀚, 李智武, 刘树根, 等. 扬子地台北缘城口地区上寒武统洗象池组风暴沉积特征及其地质意义[J]. 石油实验地质, 2019, 41(2): 176-184. doi: 10.11781/sysydz201902176 WANG Han, LI Zhiwu, LIU Shugen, et al. Sedimentary characteristics and geological significance of tempestites in the Upper Cambrian Xixiangchi Formation, Chengkou area, northern margin of the Yangtze Platform[J]. Petroleum Geology & Experiment, 2019, 41(2): 176-184. doi: 10.11781/sysydz201902176
[13]	谷明峰, 李文正, 邹倩, 等. 四川盆地寒武系洗象池组岩相古地理及储层特征[J]. 海相油气地质, 2020, 25(2): 162-170. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ202002008.htm GU Mingfeng, LI Wenzheng, ZOU Qian, et al. Lithofacies palaeogeography and reservoir characteristics of the Cambrian Xixiangchi Formation in Sichuan Basin[J]. Marine Origin Petroleum Geology, 2020, 25(2): 162-170. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ202002008.htm
[14]	李皎, 何登发. 四川盆地及邻区寒武纪古地理与构造-沉积环境演化[J]. 古地理学报, 2014, 16(4): 441-460. https://www.cnki.com.cn/Article/CJFDTOTAL-GDLX201404002.htm LI Jiao, HE Dengfa. Palaeogeography and tectonic-depositional environment evolution of the Cambrian in Sichuan Basin and adjacent areas[J]. Journal of Palaeogeography, 2014, 16(4): 441-460. https://www.cnki.com.cn/Article/CJFDTOTAL-GDLX201404002.htm
[15]	徐安娜, 胡素云, 汪泽成, 等. 四川盆地寒武系碳酸盐岩-膏盐岩共生体系沉积模式及储层分布[J]. 天然气工业, 2016, 36(6): 11-20. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201606004.htm XU Anna, HU Suyun, WANG Zecheng, et al. Sedimentary mode and reservoir distribution of the Cambrian carbonate & evaporite paragenesis system in the Sichuan Basin[J]. Natural Gas Industry, 2016, 36(6): 11-20. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201606004.htm
[16]	林怡, 陈聪, 山述娇, 等. 四川盆地寒武系洗象池组储层基本特征及主控因素研究[J]. 石油实验地质, 2017, 39(5): 610-617. doi: 10.11781/sysydz201705610 LIN Yi, CHEN Cong, SHAN Shujiao, et al. Reservoir characte-ristics and main controlling factors of the Cambrian Xixiangchi Formation in the Sichuan Basin[J]. Petroleum Geology & Experiment, 2017, 39(5): 610-617. doi: 10.11781/sysydz201705610
[17]	李文正, 周进高, 张建勇, 等. 四川盆地洗象池组储集层的主控因素与有利区分布[J]. 天然气工业, 2016, 36(1): 52-60. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201601010.htm LI Wenzheng, ZHOU Jingao, ZHANG Jianyong, et al. Main controlling factors and favorable zone distribution of Xixiangchi Formation reservoirs in the Sichuan Basin[J]. Natural Gas Industry, 2016, 36(1): 52-60. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201601010.htm
[18]	赵爱卫, 谭秀成, 李凌, 等. 四川盆地及其周缘地区寒武系洗象池群颗粒滩特征及分布[J]. 古地理学报, 2015, 17(1): 21-32. https://www.cnki.com.cn/Article/CJFDTOTAL-GDLX201501002.htm ZHAO Aiwei, TAN Xiucheng, LI Ling, et al. Characteristics and distribution of grain banks in the Cambrian Xixiangchi Group of Sichuan Basin and its adjacent areas[J]. Journal of Palaeogeo-graphy, 2015, 17(1): 21-32. https://www.cnki.com.cn/Article/CJFDTOTAL-GDLX201501002.htm
[19]	朱光有, 张水昌, 梁英波. 四川盆地深部海相优质储集层的形成机理及其分布预测[J]. 石油勘探与开发, 2006, 33(2): 161-166. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK200602008.htm ZHU Guangyou, ZHANG Shuichang, LIANG Yingbo. Formation mechanism and distribution prediction of high-quality marine reservoir in deeper Sichuan Basin[J]. Petroleum Exploration and Development, 2006, 33(2): 161-166. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK200602008.htm
[20]	朱光有, 张水昌, 梁英波, 等. TSR对深部碳酸盐岩储层的溶蚀改造: 四川盆地深部碳酸盐岩优质储层形成的重要方式[J]. 岩石学报, 2006, 22(8): 2182-2194. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB200608007.htm ZHU Guangyou, ZHANG Shuichang, LIANG Yingbo, et al. Dissolution and alteration of the deep carbonate reservoirs by TSR: an important type of deep-buried high-quality carbonate reservoirs in Sichuan Basin[J]. Acta Petrologica Sinica, 2006, 22(8): 2182-2194. https://www.cnki.com.cn/Article/CJFDTOTAL-YSXB200608007.htm
[21]	蒋小琼, 管宏林, 刘光祥, 等. 四川盆地南川地区娄山关群碳酸盐岩成岩作用研究[J]. 石油实验地质, 2015, 37(3): 314-319. doi: 10.11781/sysydz201503314 JIANG Xiaoqiong, GUAN Honglin, LIU Guangxiang, et al. Diagenesis of Middle and Upper Cambrian Loushanguan Group reservoirs in Nanchuan area, Sichuan Basin[J]. Petroleum Geology & Experiment, 2015, 37(3): 314-319. doi: 10.11781/sysydz201503314
[22]	杨振恒, 胡宗全, 熊亮, 等. 深层页岩气源储耦合机理研究: 以川南地区X井为例[J]. 油气藏评价与开发, 2020, 10(5): 20-27. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ202005006.htm YANG Zhenheng, HU Zongquan, XIONG Liang, et al. Gas storage characteristics and coupling characteristics of deep shale gas: a case study of well-X in southern Sichuan Basin, China[J]. Reservoir Evaluation and Development, 2020, 10(5): 20-27. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ202005006.htm
[23]	陈克勇, 鲁洪江, 何怡坤, 等. 以古溶洞主导的白云岩岩溶储渗体分布模式[J]. 断块油气田, 2020, 27(1): 13-16. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202001004.htm CHEN Keyong, LU Hongjiang, HE Yikun, et al. Distribution characteristics of dolomite reservoir-permeability systems determinedby epikarstic paleocaves[J]. Fault-Block Oil and Gas Field, 2020, 27(1): 13-16. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202001004.htm
[24]	四川油气区石油地质志编写组. 中国石油地质志(卷十): 四川油气区[M]. 北京: 石油工业出版社, 1989. Compilation Group of Petroleum Geology of Sichuan Oil and Gas Area. Petroleum geology of China(V. 10): Sichuan oil and gas area[M]. Beijing: Petroleum Industry Press, 1989.
[25]	何颂根, 龙永平, 李永明, 等. 超深海相碳酸盐岩储层可压性主控因素[J]. 断块油气田, 2020, 27(5): 573-578. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202005008.htm HE Songgen, LONG Yongping, LI Yongming, et al. Main controlling factors of fracability in ultra-deep marine carbonate reservoir[J]. Fault-Block Oil and Gas Field, 2020, 27(5): 573-578. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202005008.htm
[26]	颜丹平, 金哲龙, 张维宸, 等. 川渝湘鄂薄皮构造带多层拆离滑脱系的岩石力学性质及其对构造变形样式的控制[J]. 地质通报, 2008, 27(10): 1687-1697. https://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD200810012.htm YAN Danping, JIN Zhelong, ZHANG Weichen, et al. Rock mechanical characteristics of the multi-layer detachment fault system and their controls on the structural deformation style of the Sichuan-Chongqing-Hunan-Hubei thin-skinned belt, South Gansu, China[J]. Geological Bulletin of China, 2008, 27(10): 1687-1697. https://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD200810012.htm
[27]	吴航, 邱楠生, 常健, 等. 川东多套滑脱层褶皱构造带形成物理模拟[J]. 地球科学, 2019, 44(3): 784-797. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201903008.htm WU Hang, QIU Nansheng, CHANG Jian, et al. Physical simulation on development of multilayer detachment fold belt in eastern Sichuan[J]. Earth Science, 2019, 44(3): 784-797. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201903008.htm