Hydrocarbon accumulation characteristics and main controlling factors for Permian Maokou Formation in Yuanba area, Sichuan Basin
-
摘要: 四川盆地元坝地区YB7井二叠系茅口组的突破，揭示了元坝地区茅口组巨大的勘探潜力。随着资料的不断丰富，及时加强其油气规律认识，总结成藏主控因素，可为下步油气勘探部署提供依据。在分析茅口组气藏基本成藏条件及气藏特征的基础上，开展了气源对比、油气充注时间分析等研究，系统总结了油气成藏主控因素。研究区内烃源岩和油气保存条件好，储层为浅滩叠合岩溶缝洞储层，气藏表现为异常高压高温气藏，天然气具有干酪根裂解气和原油裂解气的混合气特征，主要来源于二叠系吴家坪组烃源岩，油气在中侏罗世大量充注，有持续充注的特点。油气成藏主要受储层发育、烃源岩条件及油气保存条件的共同控制。Abstract: A breakthrough has been made in the Permian Maokou Formation by the well of YB 7 in Yuanba area of the Sichuan Basin, which shows a great exploration potential. With continuous enrichment of data, it is necessary to strengthen the understanding of oil and gas laws and to summarize the main controlling factors of hydrocarbon accumulation, by which a basis for oil and gas exploration and deployment may be provided. In this paper, basic accumulation conditions and characteristics of gas pools in the Maokou Formation were studied, gas-source correlation and hydrocarbon charging time analyses were carried out, and some main controlling factors for hydrocarbon accumulation were summarized. The study area has favorable conditions for source rock and hydrocarbon preservation. The reservoir is mainly shoal superimposed karst fractured type. The gas pool is characterized by abnormally high pressure and high temperature. The natural gas is accumulated from both kerogen and crude oil cracking gas, mainly derived from the Wujiaping Formation. The oil and gas are largely filled in the Middle Jurassic, characterized by continuous filling. The hydrocarbon accumulation in the study area is mainly controlled by reservoir development, source rock conditions and hydrocarbon preservation conditions.
-
图 1 四川盆地元坝地区构造位置与典型井二叠系吴家坪组—茅口组综合柱状图
Figure 1. Structural location of Yuanba area in Sichuan Basin and synthesis histogram of Wujiaping-Maokou formations in typical wells
图 2 四川盆地元坝地区及邻区天然气来源判识
判别图版来自文献[16]。
Figure 2. Sources of natual gas in Yuanba and neighboring areas, Sichuan Basin
图 3 四川盆地元坝地区二叠系茅口组天然气与烃源岩干酪根碳同位素对比
Figure 3. Comparison of carbon isotope between natural gas and source rock kerogen, Permian Maokou Formation, Yuanba area, Sichuan Basin
图 4 四川盆地元坝地区二叠系茅口组储层方解石充填物中包裹体显微照片
Figure 4. Microphotograph of fluid inclusions in calcite fillings of Permian Maokou Formation reservoir in Yuanba area, Sichuan Basin
图 5 四川盆地元坝地区二叠系茅口组包裹体均一温度分布
Figure 5. Homogenization temperature distribution of fluid inclusions in Permian Maokou Formation reservoir in Yuanba area, Sichuan Basin
图 6 四川盆地元坝地区埋藏史—热史曲线
Figure 6. Buried depth and thermal evolution history curves of Yuanba area, Sichuan Basin
图 7 四川盆地元坝地区二叠系茅口组油气成藏模式
Figure 7. Gas accumulation pattern of Permian Maokou Formation in Yuanba area, Sichuan Basin
表 1 四川盆地元坝地区二叠系茅口组及周边钻井二叠—三叠系天然气组分及同位素特征
Table 1. Natural gas composition and isotope characteristics of Permian Maokou Formation in Yuanba area and Permian-Triassic in surrounding wells, Sichuan Basin
井号 层位 井段/m C1/% C2/% C3/% C1/C1-5 N2/% CO2/% H2S/% δ13C1/‰ δ13C2/‰ δ13C3/‰ YB7井 茅三段 6 923~6 963 94.45 0.400 - 0.995 8 - 5.14 -28.9 -27.3 -26.6 93.41 0.470 - 0.995 0 0.06 6.04 -29.4 -27.9 -26.6 93.11 0.490 - 0.994 8 0.03 6.37 -29.2 -27.9 -26.8 94.35 0.390 - 0.995 8 - 5.24 -28.7 -27.7 -26.3 93.74 0.450 - 0.995 2 - 5.79 -29.1 -27.7 -26.6 95.94 0.410 0.02 0.995 5 0.23 3.38 0.000 769 95.96 0.410 0.02 0.995 5 0.23 3.37 0.000 029 95.95 0.410 0.02 0.995 5 0.23 3.37 0.000 003 YB7-C1井 茅三段 6 930~6 957 97.31 0.559 0.032 0.994 0 0.24 1.86 0.001 501 YB27井 长兴组 6 262~6 319 90.71 0.040 - 0.996 7 0.83 3.12 5.14 -28.9 -26.6 YB29井 长兴组 6 636~6 699 89.77 0.040 0.02 0.999 3 0.52 4.97 4.15 -28.9 -29.3 L4井 茅二段 98.45 0.95(C2+) 0.990 4 0.03 0.48 微量 -28.49 -34.6 98.45 0.95(C2+) 0.998 0 1.01 0.02 0.72 -34.8 L004-1 茅二段 96.87 0.13 - 0.998 7 1.34 0.81 0.806 96.94 0.14(C2+) 0.999 0 1.34 0.04 0.740 -31.55 -29.82 L16井 茅二段 91.97 0.13(C2+) 0.998 6 0.69 0.67 6.51 -28.7 -30.00 -33.40 98.12 0.3(C2+) 0.997 0 1.18 0.39 - -27.66 -26.27 97.42 0.14(C2+) 0.999 0 0.92 0.68 0.81 -30.87 -27.71 -28.94 注：L4，L004-1，L16井数据来源于参考文献[12]。 
下载: 导出CSV
-
[1] 郭旭升, 胡东风. 川东北礁滩天然气勘探新进展及关键技术[J]. 天然气工业, 2011, 31(10): 6-11. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201110004.htmGUO Xusheng, HU Dongfeng. Newest progress and key techniques in gas exploration of reef-bank reservoirs in the northeastern Sichuan Basin[J]. Natural Gas Industry, 2011, 31(10): 6-11. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201110004.htm [2] 马永生, 蔡勋育, 赵培荣. 元坝气田长兴组—飞仙关组礁滩相储层特征和形成机理[J]. 石油学报, 2014, 35(6): 1001-1011. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201406001.htmMA Yongsheng, CAI Xunyu, ZHAO Peirong. Characteristics and formation mechanisms of reef-shoal carbonate reservoirs of Changxing-Feixianguan formations, Yuanba gas field[J]. Acta Petrolei Sinica, 2014, 35(6): 1001-1011. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201406001.htm [3] 郭彤楼. 元坝深层礁滩气田基本特征与成藏主控因素[J]. 天然气工业, 2011, 31(10): 12-16. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201110005.htmGUO Tonglou. Basic characteristics of deep reef-bank reservoirs and major controlling factors of gas pools in the Yuanba Gas Field[J]. Natural Gas Industry, 2011, 31(10): 12-16. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201110005.htm [4] 胡东风. 普光气田与元坝气田礁滩储层特征的差异性及其成因[J]. 天然气工业, 2011, 31(10): 17-21. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201110006.htmHU Dongfeng. Differences in reef-bank reservoir features between Puguang and Yuanba gas fields and their reasons[J]. Natural Gas Industry, 2011, 31(10): 17-21. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201110006.htm [5] 刘若冰, 郭彤楼, 邵明莉. 川东北元坝地区中浅层天然气气源及成因类型[J]. 天然气工业, 2011, 31(6): 34-38. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201106007.htmLIU Ruobing, GUO Tonglou, SHAO Mingli. Sources and genetic types of gas in the middle-shallow strata of the Yuanba area, northeastern Sichuan Basin[J]. Natural Gas Industry, 2011, 31(6): 34-38. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201106007.htm [6] 黄仁春. 川东北元坝地区雷口坡组天然气来源与成藏分析[J]. 现代地质, 2014, 28(2): 412-418. https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ201402020.htmHUANG Renchun. Source and accumulation of natural gas in Leikoupo Formation, Yuanba area, eastern-northern Sichuan Basin[J]. Geoscience, 2014, 28(2): 412-418. https://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ201402020.htm [7] 段金宝, 李平平, 陈丹, 等. 元坝气田长兴组礁滩相岩性气藏形成与演化[J]. 岩性油气藏, 2013, 25(3): 43-47. https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201303010.htmDUAN Jinbao, LI Pingping, CHEN Dan, et al. Formation and evolution of the reef fiat facies lithologic gas reservoir of Changxing Formation in Yuanba gas field, Sichuan Basin[J]. Lithologic Reservoirs, 2013, 25(3): 43-47. https://www.cnki.com.cn/Article/CJFDTOTAL-YANX201303010.htm [8] 吴小奇, 刘光祥, 刘全有, 等. 四川盆地元坝气田长兴组—飞仙关组天然气地球化学特征及成因类型[J]. 天然气地球科学, 2015, 26(11): 2155-2165. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201511018.htmWU Xiaoqi, LIU Guangxiang, LIU Quanyou, et al. Geochemical characteristics and genetic types of natural gas in the Changxing-Feixianguan formations from Yuanba gasfield in the Sichuan Basin[J]. Natural Gas Geoscience, 2015, 26(11): 2155-2165. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201511018.htm [9] 戴金星, 倪云燕, 秦胜飞, 等. 四川盆地超深层天然气地球化学特征[J]. 石油勘探与开发, 2018, 45(4): 588-597. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201804006.htmDAI Jinxing, NI Yunyan, QIN Shengfei, et al. Geochemical characte-ristics of ultra-deep natural gas in the Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2018, 45(4): 588-597. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201804006.htm [10] 范小军. 川东北元坝地区长兴组与飞仙关组天然气成藏差异性成因[J]. 天然气工业, 2012, 32(6): 15-20. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201206005.htmFAN Xiaojun. Causes of differences of natural gas pooling between the Changxing Formation and the Feixianguan Formation in Yuanba, Sichuan Basin[J]. Natural Gas Industry, 2012, 32(6): 15-20. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201206005.htm [11] 胡东风. 四川盆地元坝地区茅口组台缘浅滩天然气勘探的突破与启示[J]. 天然气工业, 2019, 39(3): 1-10. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201903001.htmHU Dongfeng. Breakthrough in natural gas exploration in the platform margin shoal at the Maokou Fm in the Yuanba area, Sichuan Basin, and its implications[J]. Natural Gas Industry, 2019, 39(3): 1-10. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201903001.htm [12] 刘羿伶. 川西北部地区中二叠统茅口组天然气成藏研究[D]. 成都: 西南石油大学, 2018.LIU Yiling. Study on Natural Gas Accumulation in Maokou Formation of Middle Permian in northwest Sichuan[D]. Chengdu: Southwest Petroleum University, 2018. [13] 中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. 天然气藏分类: GB/T 26979-2011[S]. 北京: 中国标准出版社, 2012.General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China. The classification of natural gas pool: GB/T 26979-2011[S]. Beijing: Standards Press of China, 2012. [14] PRINZHOFER A A, HUC A Y. Genetic and post-genetic molecular and isotopic fractionations in natural gases[J]. Chemical Geology, 1995, 126(3/4): 281-290. [15] 黄光辉, 张敏, 胡国艺, 等. 原油裂解气和干酪根裂解气的地球化学研究(Ⅱ): 原油裂解气和干酪根裂解气的区分方法[J]. 中国科学(D辑地球科学), 2008, 38(S2): 9-16. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK2008S2003.htmHUANG Guanghui, ZHANG Min, HU Guoyi, et al. Geochemical study on oil-cracked gases and kerogen-cracked gases (Ⅱ): discrimination methods between oil-cracked gases and kerogen-cracked gases[J]. Science in China(Series D Earth Sciences), 2009, 52(1): 10-18. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK2008S2003.htm [16] 郭旭升, 黄仁春, 付孝悦, 等. 四川盆地二叠系和三叠系礁滩天然气富集规律与勘探方向[J]. 石油与天然气地质, 2014, 35(3): 295-302. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201403002.htmGUO Xusheng, HUANG Renchun, FU Xiaoyue, et al. Gas accumulation and exploration direction of the Permian and Triassic reservois of reef-bank facies in Sichuan Basin[J]. Oil & Gas Geology, 2014, 35(3): 295-302. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT201403002.htm [17] DAI Jinxing. Identification and distribution of various alkane gases[J]. Science in China Series B, 1992, 35(10): 1246-1257. [18] 邓焱, 胡国艺, 赵长毅. 四川盆地龙岗气田长兴组—飞仙关组天然气地球化学特征及成因[J]. 天然气地球科学, 2018, 29(6): 892-907. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201806017.htmDENG Yan, HU Guoyi, ZHAO Changyi. Geochemical characte-ristics and origin of natural gas in Changxing-Feixianguan formations from Longgang gasfield in the Sichuan Basin, China[J]. Natural Gas Geoscience, 2018, 29(6): 892-907. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201806017.htm [19] 李延钧, 赵圣贤, 李跃纲, 等. 川西北地区九龙山气田天然气成因与来源探讨[J]. 天然气地球科学, 2013, 24(4): 755-767. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201304016.htmLI Yanjun, ZHAO Shengxian, LI Yuegang, et al. Natural gas genesis and sources in Jiulongshan gas field, northwest Sichuan Basin[J]. Natural Gas Geoscience, 2013, 24(4): 755-767. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201304016.htm [20] 戴金星, 倪云燕, 邹才能, 等. 四川盆地须家河组煤系烷烃气碳同位素特征及气源对比意义[J]. 石油与天然气地质, 2009, 30(5): 519-529. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200905001.htmDAI Jinxing, NI Yunyan, ZOU Caineng, et al. Carbon isotope features of alkane gases in the coal measures of the Xujiahe Formation in the Sichuan Basin and their significance to gas-source correlation[J]. Oil & Gas Geology, 2009, 30(5): 519-529. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200905001.htm [21] 王兰生, 苟学敏, 刘国瑜, 等. 四川盆地天然气的有机地球化学特征及其成因[J]. 沉积学报, 1997, 15(2): 49-53. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB702.009.htmWANG Lansheng, GOU Xuemin, LIU Guoyu, et al. The organic geochemistry and origin of natural gases in Sichuan basin[J]. Acta Sedimentologica Sinica, 1997, 15(2): 49-53. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB702.009.htm [22] 魏国齐, 董才源, 谢增业, 等. 川西北地区ST3井泥盆系油气地球化学特征及来源[J]. 中国石油大学学报(自然科学版), 2019, 43(4): 31-39. https://www.cnki.com.cn/Article/CJFDTOTAL-SYDX201904004.htmWEI Guoqi, DONG Caiyuan, XIE Zengye, et al. Oil and gas geochemical characteristics and source of Devonian of well ST3 in northewest Sichuan Basin[J]. Journal of China University of Petroleum, 2019, 43(4): 31-39. https://www.cnki.com.cn/Article/CJFDTOTAL-SYDX201904004.htm [23] 杨跃明, 文龙, 罗冰, 等. 四川盆地乐山—龙女寺古隆起震旦系天然气成藏特征[J]. 石油勘探与开发, 2016, 43(2): 179-188. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201602004.htmYANG Yueming, WEN Long, LUO Bing, et al. Hydrocarbon accumulation of Sinian natural gas reservoirs, Leshan-Longnüsi paleohigh, Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2016, 43(2): 179-188. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201602004.htm [24] 李平平, 郭旭升, 郝芳, 等. 四川盆地元坝气田长兴组古油藏的定量恢复及油源分析[J]. 地球科学, 2016, 41(3): 452-462. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201603011.htmLI Pingping, GUO Xusheng, HAO Fang, et al. Paleo-oil-reservoirs reconstruction and oil correlation of Changxing Formation in the Yuanba gas field, Sichuan Basin[J]. Earth Science, 2016, 41(3): 452-462. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201603011.htm [25] 杨柳, 巫芙蓉, 郭鸿喜, 等. 川南YJ向斜区茅口组储层地震预测与主控因素分析[J]. 断块油气田, 2021, 28(3): 363-368. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202103015.htmYANG Liu, WU Furong, GUO Hongxi, et al. Reservoir seismic prediction and main controlling factors analysis of Maokou Formationin YJ Syncline area, South Sichuan Basin[J]. Fault-Block Oil and Gas Field, 2021, 28(3): 363-368. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202103015.htm [26] 谢知含, 侯宇, 雷开强, 等. XC地区茅口组岩溶储层发育有利区预测[J]. 断块油气田, 2021, 28(2): 230-234. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202102016.htmXIE Zhihan, HOU Yu, LEI Kaiqiang, et al. Prediction of favorable development area of Maokou Formation karst reservoir in XC area[J]. Fault-Block Oil and Gas Field, 2021, 28(2): 230-234. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202102016.htm [27] 杨恒, 龚文平, 郑伦举. 煤系烃源岩油气生成、排出与滞留特征[J]. 石油实验地质, 2021, 43(3): 498-506. doi: 10.11781/sysydz202103498YANG Heng, GONG Wenping, ZHENG Lunju. Characteristics of oil and gas generation, expelling and retention of coaly source rock[J]. Petroleum Geology & Experiment, 2021, 43(3): 498-506. doi: 10.11781/sysydz202103498 [28] 肖贤明, 刘德汉, 傅家谟. 我国聚煤盆地煤系烃源岩生烃评价与成烃模式[J]. 沉积学报, 1996, 14(S1): 10-17. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB6S1.001.htmXIAO Xianming, LIU Dehan, FU Jiamo. The evaluation of coal-measure source rocks of coal-bearing basins in China and their hydrocarbon-generating models[J]. Acta Sedimentologica Sinica, 1996, 14(S1): 10-17. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB6S1.001.htm [29] 吴斌, 周龙刚, 潘新志, 等. 新疆三塘湖盆地低煤阶煤层气成因探讨[J]. 特种油气藏, 2020, 27(1): 47-54. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ202001007.htmWU Bin, ZHOU Longgang, PAN Xinzhi, et al. Discussion on genesis low coal rank coalbed methane in Santanghu Basin of Xinjiang province[J]. Special Oil & Gas Reserviors, 2020, 27(1): 47-54. https://www.cnki.com.cn/Article/CJFDTOTAL-TZCZ202001007.htm [30] 何发岐, 董昭雄, 赵兰, 等. 深部煤层游离气形成机理及资源意义[J]. 断块油气田, 2021, 28(5): 604-608, 613. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202105006.htmHE Faqi, DONG Zhaoxiong, ZHAO Lan, et al. Formation mechanism and resource significance of free gas in deep coalbed[J]. Fault-Block Oil and Gas Field, 2021, 28(5): 604-608, 613. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202105006.htm -
图(7) / 表(1)
计量
- 文章访问数: 606
- HTML全文浏览量: 195
- PDF下载量: 57
- 被引次数: 0
苏公网安备32021102000780号