四川盆地川西坳陷新场须家河组二段气藏甜点模式及形成机理

doi:10.11743/ogg20210407

Abstract

Abstract:

Sweet spot evaluation of the tight sandstone reservoirs is of great importance to effectively developing reserves.The elaborate description of the gas pools in the 2^nd member of Xujiahe Formation (Xu 2 Member/T₃x²), serves to establish the sweet spot model and formulate the criteria for identification, and clarify the geological distribution of the sweet spots.Furthermore, the forming mechanism of the sweet spots in tight sandstone gas pools is discussed.The results show that: (1) the effective reservoirs can be grouped into two categories, namely the medium-to-coarse-grained sandstone with flat fractures (with a dip angle less than or equal to 10°), and the massive medium-to-coarse-grained sandstone; the effective fractures are structural fractures with a dip angle greater than 30°.(2) The sweet spots can be classified into three categories, namely the fault-, bedding fissure-, and pore-dominated categories.The first one is characterized by high dip angle fractures, mainly developed in the fault-fracture body dominated by SN-oriented faults; the last two are characterized by less developed high dip angle fractures, mainly distributed in high-quality formations outside of the fault-fracture body.(3) Gas-bearing zones of relatively high tectonic position serve as the basis factor for the sweet spot development in T₃x², the fault-fracture body affected by later faulting is a major factor controlling sweet spot growth, and the quality of favorable formations controls the formation of the other two categories.In all, it is of great significance to building the sweet spot models and identifying its forming mechanism for the gas pools, which could deepen our understanding on the sweet spot-related theories of tight sandstone gas pools, and is of strong support to the sweet spot distribution prediction and movable reserves evaluation.

Key words: sweet spot model, evaluation criterion, fault-karst, high-quality reservoir, tight sandstone gas pool, Xujiahe Formation, Sichuan Basin

CLC Number:

TE122.3

Junlong Liu, Zongquan Hu, Zhongqun Liu, Wujun Jin, Kaihua Xiao, Youyi Bi, Jitong Li. Gas pool sweet spot models and their forming mechanism in the Xu 2 Member in Xinchang area, Western Sichuan Depression, Sichuan Basin[J]. Oil & Gas Geology, 2021, 42(4): 852-862.

Figures/Tables 10

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References 30

1	邹才能, 杨智, 何东博, 等. 常规-非常规天然气理论、技术及前景[J]. 石油勘探与开发, 2018, 45 (4): 575- 587.
	Zou Caineng , Yang Zhi , He Dongbo , et al. Theory, technology and prospects of conventional and unconventional natural gas[J]. Petroleum Exploration and Development, 2018, 45 (4): 575- 587.
2	蔡勋育, 邱桂强, 孙冬胜, 等. 中国中西部大型盆地致密砂岩油气"甜点"类型与特征[J]. 石油与天然气地质, 2020, 41 (4): 1- 12.
	Cai Xunyu , Qiu Guiqiang , Sun Dongsheng , et al. Types and characteri-stics of tight sandstone spots in large basins of central-western China[J]. Oil & Gas Geology, 2020, 41 (4): 1- 12.
3	戴金星, 倪云燕, 吴小奇. 中国致密砂岩气及在勘探开发上的重要意义[J]. 石油勘探与开发, 2012, 39 (3): 257- 264.
	Dai Jinxing , Ni Yunyan , Wu Xiaoqi . Tight gas in China and its significance in exploration and exploitation[J]. Petroleum Exploration and Developmen, 2012, 39 (3): 257- 264.
4	贾承造, 邹才能, 李建忠, 等. 中国致密油评价标准、主要类型、基本特征及资源前景[J]. 石油学报, 2012, 33 (3): 343- 350.
	Jia Chengzao , Zou Caineng , Li Jianzhong , et al. Assessment criteria, main types, basic features and resource prospects of the tight oil in China[J]. Acta Petrolei Sinica, 2012, 33 (3): 343- 350.
5	陈晓智, 陈桂华, 李祺鑫, 等. 致密砂岩气储量不确定性计算方法及意义[J]. 断块油气田, 2019, 26 (1): 17- 20, 41.
	Chen Xiaozhi , Chen Guihua , Li Qixin , et al. Uncertainty reserves calculation for tight sandstone gas and its significance[J]. Fault-Block Oil and Gas Field, 2019, 26 (1): 17- 20, 41.
6	Miall A . Fluvial depositional systems[M]. Switzerland: Springer, 2014.
7	Catuneanu O . Principles of sequence stratigraphy[M]. Amsterdam: Elsevier, 2006.
8	杨克明, 朱宏权. 川西叠覆型致密砂岩气区地质特征[J]. 石油实验地质, 2013, 35 (1): 1- 8.
	Yang Keming , Zhu Hongquan . Geological characteristics of superposed tight sandstone gas-bearing areas in western Sichuan[J]. Petroleum Geology & Experiment, 2013, 35 (1): 1- 8.
9	张世华, 田军, 叶素娟, 等. 川西坳陷新场构造带须二段气藏成藏过程[J]. 天然气工业, 2019, 39 (S1): 17- 22.
	Zhang Shihua , Tian Jun , Ye Sujuan , et al. Gas reservoir formation process of the second member of the Xujiahe Formation in the Xinchang tectonic zone, western Sichuan Basin[J]. Natural Gas Industry, 2019, 39 (S1): 17- 22.
10	刘君龙, 孙冬胜, 纪友亮, 等. 川西晚侏罗世前陆盆地浅水三角洲砂体分布特征与叠置模式[J]. 石油与天然气地质, 2018, 39 (6): 1164- 1178.
	Liu Junlong , Sun Dongsheng , Ji Youliang , et al. Distribution characteristics and its superimposed patterns of the late Jurassic shallow water deltic sandbody in the Western Sichuan Depression[J]. Oil & Gas Geology, 2018, 39 (6): 1164- 1178.
11	王双龙, 程奇, 房娜, 等. 锦州南油田古近系辫状河三角洲前缘沉积特征及砂体叠置模式[J]. 石油地质与工程, 2020, 34 (6): 20- 27. doi: 10.3969/j.issn.1673-8217.2020.06.004
	Wang Shanglong , Cheng Qi , Fang Na , et al. Sedimentary characteristics and sand body superimposition model of Paleogene braided river delta front in Jinzhou south oilfield[J]. Petroleum Geology & Engineering, 2020, 34 (6): 20- 27. doi: 10.3969/j.issn.1673-8217.2020.06.004
12	蔡希源. 深层致密砂岩气藏天然气富集规律与勘探关键技术——以四川盆地川西坳陷须家河组天然气勘探为例[J]. 石油与天然气地质, 2010, 31 (6): 707- 714.
	Cai Xiyuan . Gas accumulation patterns and key exploration techniques of deep gas reservoirs in tight sandstone: An example from gas exploration in the Xujiahe Formation of the western Sichuan Depression, the Sichuan Basin[J]. Oil & Gas Geology, 2010, 31 (6): 707- 714.
13	刘君龙, 纪友亮, 杨克明, 等. 川西须家河组前陆盆地构造层序及沉积充填响应特征[J]. 中国石油大学学报(自然科学版), 2015, 39 (6): 11- 23. doi: 10.3969/j.issn.1673-5005.2015.06.002
	Liu Junlong , Ji Youliang , Yang Keming , et al. Tectono-stratigraphy and sedimentary infill characteristics of Xujiahe Formation in western Sichuan foreland basin[J]. Journal of China University of Petroleum, 2015, 39 (6): 11- 23. doi: 10.3969/j.issn.1673-5005.2015.06.002
14	杜宗飞, 高红灿, 郑荣才. 渝南关坝地区上三叠统须家河组沉积特征[J]. 石油地质与工程, 2019, 33 (3): 1- 4. doi: 10.3969/j.issn.1673-8217.2019.03.001
	Du Zongfei , Gao Hongcan , Zeng Rongcai . Sedimentary characteristics of upper Triassic Xujiahe Formation in Guanba area of southern Chongqing[J]. Petroleum Geology & Engineering, 2019, 33 (3): 1- 4. doi: 10.3969/j.issn.1673-8217.2019.03.001
15	田军, 张世华, 叶素娟, 等. 川西拗陷新场构造带须二段气藏类型划分及成藏主控因素[J]. 成都理工大学学报(自然科学版), 2017, 44 (6): 659- 667. doi: 10.3969/j.issn.1671-9727.2017.06.03
	Tian Jun , Zhang Shihua , Ye Sujuan , et al. Classification of gas accumulation types and main controlling factors of gas accumulation of the Xu-2 Member in Xinchang structural zone, western Sichuan Depression, China[J]. Journal of Chengdu University of Technology (Scie-nce & Technology Edition), 2017, 44 (6): 659- 667. doi: 10.3969/j.issn.1671-9727.2017.06.03
16	王玮, 沈忠民, 裴森奇, 等. 致密砂岩气藏油气轻烃特征及其地质意义: 以四川盆地西北部须家河组气藏为例[J]. 石油实验地质, 2018, 40 (6): 818- 827.
	Wang Wei , Shen Zhongmin , Pei Senqi , et al. Light hydrocarbon chara-cteristics of petroleum in a tight sandstone gas reservoir and its geological significance: A case study of the Upper Triassic Xujiahe Formation gas reservoir in the northwestern Sichuan Basin[J]. Petroleum Geology & Experiment, 2018, 40 (6): 818- 827.
17	唐大海, 谭秀成, 王小娟, 等. 四川盆地须家河组致密气藏成藏要素及有利区带评价[J]. 特种油气藏, 2020, 27 (3): 40- 46. doi: 10.3969/j.issn.1006-6535.2020.03.007
	Tang Dahai , Tan Xiucheng , Wang Xiaojuan , et al. Tight gas accumulation elements and favorable zone evaluation of Xujiahe Formation in Sichuan Basin[J]. Specail Oil & Gas Reservoirs, 2020, 27 (3): 40- 46. doi: 10.3969/j.issn.1006-6535.2020.03.007
18	魏新善, 胡爱平, 赵会涛, 等. 致密砂岩气地质认识新进展[J]. 岩性油气藏, 2017, 29 (1): 11- 20.
	Wei Xinshan , Hu Aiping , Zhao Huitao , et al. New geological understanding of tight sandstone gas[J]. Lithologic Reservoirs, 2017, 29 (1): 11- 20.
19	车国琼, 王立恩, 汪轰静, 等. 断层对致密砂岩气藏甜点区的控制作用——以四川盆地中部蓬莱地区须二段气藏为例[J]. 天然气工业, 2019, 39 (9): 22- 32.
	Che Guoqiong , Wang Lien , Wang Hongjing , et al. Control action of faults on the sweet spots of tight sandstone gas reservoir: A case study of the second Member of Xujiahe gas reservoir in the Penglai area, Central Sichuan Basin[J]. Natural Gas Industry, 2019, 39 (9): 22- 32.
20	付菊, 操延辉, 叶素娟, 等. 次生致密砂岩气藏甜点综合评价——以四川盆地中江气田侏罗系气藏为例[J]. 天然气工业, 2019, 39 (S1): 23- 29.
	Fu Ju , Cao Yanhui , Ye Sujuan , et al. Comprehensive evaluation of secondary tight sandstone gas reservoirs, a case study from the Zhongjiang gas field Jurassic reservoirs of the Sichuan Basin[J]. Natural Gas Industry, 2019, 39 (S1): 23- 29.
21	赵龙梅, 文桂华, 李星涛, 等. 鄂尔多斯盆地大宁-吉县区块山西组2³亚段致密砂岩气储层"甜点区"评价[J]. 天然气工业, 2018, 38 (S1): 5- 10.
	Zhao Longmei , Wen Guihua , Li Xingtao , et al. Tight sandstone reservoirs sweet spots evaluation of the 2^nd-3^rd member of the Shanxi Formation in the Daning-Jixian area of the Ordos Basin[J]. Natural Gas Industry, 2018, 38 (S1): 5- 10.
22	王莹, 张克银, 甘其刚, 等. 四川盆地西部新场地区上三叠统须家河组二段构造裂缝的分布规律[J]. 地质学刊, 2015, 39 (4): 543- 551. doi: 10.3969/j.issn.1674-3636.2015.04.543
	Wang Ying , Zhang Keyin , Gan Qigang , et al. Distribution rules of structural fractures in the second member of the Upper Triassic Xujiahe Formation in the Xinchang area, western Sichuan Basin[J]. Journal of Geology, 2015, 39 (4): 543- 551. doi: 10.3969/j.issn.1674-3636.2015.04.543
23	赵仲祥, 董春梅, 林承焰, 等. 西湖凹陷深层低渗-致密气藏"甜点"类型划分及成因探讨[J]. 石油与天然气地质, 2018, 39 (4): 778- 790.
	Zhao Zhongxiang , Dong Chunmei , Lin Chengyan , et al. Classification and origin of "sweet spots" in deep low permeability tight gas reservoirs, Xihu Sag, East China Sea Shelf Basin[J]. Oil & Gas Geology, 2018, 39 (4): 778- 790.
24	郑荣才, 叶泰然, 翟文亮, 等. 川西坳陷上三叠统须家河组砂体分布预测[J]. 石油与天然气地质, 2008, 29 (3): 405- 411.
	Zheng Rongcai , Ye Tairan , Zhai Wenliang , et al. Prediction of sandbody distribution in the Upper Triassic Xujiahe Formation, the West Sichuan Depression[J]. Oil & Gas Geology, 2008, 29 (3): 405- 411.
25	李嵘, 张娣, 朱丽霞. 四川盆地川西坳陷须家河组砂岩致密化研究[J]. 石油实验地质, 2011, 33 (3): 274- 281.
	Li Rong , Zhang Di , Zhu Lixia . Densification of Upper Triassic Xujiahe tight sandstones, western Sichuan, China[J]. Petroleum Geology & Experiment, 2011, 33 (3): 274- 281.
26	曾焱, 黎华继, 周文雅, 等. 川西坳陷东坡中江气田沙溪庙组复杂"窄"河道致密砂岩气藏高产富集规律[J]. 天然气勘探与开发, 2017, 40 (4): 1- 8.
	Zeng Yan , Li Huaji , Zhou Wenya , et al. High-yield enrichment laws of Shaximiao Formation tight sandstone gas reservoir of complex "narrow" channel in Zhongjiang gas field, in the eastern slope of West Sichuan Depression[J]. Natural Gas Exploration and Development, 2017, 40 (4): 1- 8.
27	叶素娟, 朱宏权, 李嵘, 等. 天然气运移有机-无机地球化学示踪指标——以四川盆地川西坳陷侏罗系气藏为例[J]. 石油勘探与开发, 2017, 44 (4): 549- 560.
	Ye Sujuan , Zhu Hongquan , Li Rong , et al. Tracing natural gas migration by integrating organic and inorganic geochemical data: A case study of the Jurassic gas fields in western Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2017, 44 (4): 549- 560.
28	马立元, 周总瑛. 川西坳陷中段上三叠统须家河组天然气资源潜力分析[J]. 天然气地球科学, 2009, 20 (5): 730- 737.
	Ma Liyuan , Zhou Zongying . Analysis of natural gas Tertiary Xujiahe Formation in the resource potentiality for Upper Middle Part of West Sichuan Depression[J]. Natural Gas Geoscience, 2009, 20 (5): 730- 737.
29	李蒙, 商晓飞, 赵华伟, 等. 基于likelihood地震属性的致密气藏断裂预测——以四川盆地川西坳陷新场地区须二段为例[J]. 石油与天然气地质, 2020, 41 (6): 1299- 1309.
	Li Meng , Shang Xiaofei , Zhao Huawei , et al. Prediction of fractures in tight gas reservoirs based on likelihood attribute-A case study of the 2nd member of Xujiahe Formation in Xinchang area, Western Sichuan Depression, Sichuan Basin[J]. Oil & Gas Geology, 2020, 41 (6): 1299- 1309.
30	吕文雅, 苗凤彬, 张本键, 等. 四川盆地剑阁地区须家河组致密砾岩储层裂缝特征及对天然气产能的影响[J]. 石油与天然气地质, 2020, 41 (3): 484- 491, 557.
	Lv Wenya , Miao Fengbin , Zhang Benjian , et al. Fracture characteristics and their influence on natural gas production: A case study of the tight conglomerate reservoir in the Upper Triassic Xujiahe Formation in Jian'ge area, Sichuan Basin[J]. Oil & Gas Geology, 2020, 41 (3): 484- 491, 557.

甜点类型	储集空间	有利岩相类型	物性		孔隙结构		含气饱和度/%	储层类型	典型井
甜点类型	储集空间	有利岩相类型	渗透率/(10^-3 μm²)	孔隙度/%	中值半径/μm	描述	含气饱和度/%	储层类型	典型井
断缝型甜点	构造缝+层理缝+基质孔隙	千层饼/平行层理中-粗砂岩	≥100.00	≥3	≥0.06	好	≥58	裂缝-孔隙型	X2
断缝型甜点	构造缝+基质孔隙	块状/斜层理中砂岩	10.00~100.00	≥3	0.04~0.06	好	≥58	裂缝-孔隙型	L150
层理缝型甜点	层理缝+基质孔隙	千层饼/平行层理中-粗砂岩	10.00~100.00	≥3	0.04~0.06	好	≥58	裂缝-孔隙型	X5
层理缝型甜点	层理缝+基质孔隙	千层饼/平行层理中-粗砂岩	0.30~10.00	≥3	0.02~0.04	好	≥58	裂缝-孔隙型	X10-2
孔隙型甜点	基质孔隙	块状/斜层理中砂岩	0.03~0.30	≥5	＜0.02	中	≥58	孔隙型	GM2
				4~5
				3~4

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Gas pool sweet spot models and their forming mechanism in the Xu 2 Member in Xinchang area, Western Sichuan Depression, Sichuan Basin

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