Geological characteristics of shale gas of the Wufeng Fm-Longmaxi Fm in DD1 well in Northeast Yunnan and their exploration significances
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摘要: 四川盆地南缘五峰-龙马溪组页岩气勘探难度大。以滇东北彝良县DD1井页岩气调查井为例，利用钻测井、岩心分析测试等资料评价其页岩气地质条件。滇东北彝良县DD1井的五峰-龙马溪组富有机质页岩厚度较小、有机质丰度低、热演化程度高、含气性差、N2含量高，其主要评价指标与盆地内JY1、N203等盆内页岩气高产井差异明显。在页岩气核心评价参数对比基础之上，对DD1井五峰-龙马溪组页岩气勘探失利的地质因素进行深入分析，认为其原因主要在于3个方面：1）五峰-龙马溪期距离黔中古隆起较近，五峰-龙马溪组下段为浅水潮坪相沉积，缺乏黑色富有机质页岩的物质基础；2）五峰-龙马溪组页岩热演化程度高，导致页岩孔隙度变差；3）五峰-龙马溪组埋深较浅，多种尺度裂缝发育，页岩气逸散严重，页岩气构造保存条件差。对滇东北彝良县DD1井页岩气钻探失利的分析，为盆外五峰-龙马溪组页岩气勘探提供了启示意义。Abstract: Shale gas exploration of the Wufeng Fm-Longmaxi Fm outside Sichuan Basin is much more difficult than that within Sichuan Basin. In this paper, taking the DD1 well in Yiliang County, northeastern Yunnan as an example, we discussed geological characteristics of shale gas of the Wufeng Fm-Longmaxi Fm in DD1 well in Northeast Yunnan and their exploration significances. The geological conditions of shale gas of DD1 well are evaluated by drilling data, logging, core analysis and testing. The results show, comparing to wells in Sichuan Basin, the organic shale of the Wufeng Fm-Longmaxi Fm in DD1 well is with a thinner thickness, a lower organic matter abundance, a higher thermal evolution level, and poor gas-bearing and N2 bearing leavels. The main evaluation indicators in DD1 well are obviously different from those of high-yield shale gas wells such as JY1 Well and N203 Well in Sichuan Basin. By comparing main evaluation parameters of shale gas of wells in Sichuan Basin to those out Sichuan Basin, we think there are three reasons which led to the failure of shale gas exploration in DD1 Well. First, the DD1 Well is close to the Central Guizhou paleo-uplift, and the Wufeng Fm-Longmaxi Fm in DD1 Well is shallow tidal flat deposit, lacking the material basis of black organic shale. Second, The high Ro of the Wufeng Fm- Longmaxi Fm shale in DD1 Well resulted in poor porosity. Third, the burial depth of the Wufeng Fm-Longmaxi Fm in DD1 Well is shallow, and multiple scale fractures are developed, and shale gas escaped seriously. DD1 Well has a very poor shale gas preservation condition. The failure of shale gas exploration in DD1 well provides a reference for shale gas exploration outside Sichuan Basin.
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[1] Jarvie D M, Hill R J, Ruble T E, et al. Unconventional shale-gas systems:The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment[J]. AAPG Bulletin, 2007, 91(4):475-499.
[2] Wang Q, Chen X, Jha A N, et al. Natural gas from shale formation the evolution, evidences and challenges of shale gas revolution in United States[J]. Renewable & Sustainable Energy Reviews, 2014, 30(2):1-28.
[3] Krupnick A, Wang Z, Wang Y. Sector effects of the shale gas revolution in the United States[J]. SSRN Electronic Journal, 2013, 335(1):46-59.
[4] 马永生,蔡勋育,赵培荣.中国页岩气勘探开发理论认识与实践[J].石油勘探与开发,2018, 45(4):561-574. [5] 王淑芳,董大忠,王玉满,等.中美海相页岩气地质特征对比研究[J]. 天然气地球科学,2015,26(9):1666-1678. [6] 赵文智,李建忠,杨涛,等.中国南方海相页岩气成藏差异性比较与意义[J].石油勘探与开发,2016,43(4):499-510. [7] 郭旭升. 南方海相页岩气"二元富集"规律:四川盆地及周缘龙马溪组页岩气勘探实践认识[J]. 地质学报, 2014, 88(7):1209-1218. [8] 郭彤楼. 中国式页岩气关键地质问题与成藏富集主控因素[J].石油勘探与开发,2016, 43(3):317-326. [9] 张金川,聂海宽,徐波,等.四川盆地页岩气成藏地质条件[J].天然气工业,2008,28(2):151-156. [10] 王玉满,黄金亮,王淑芳,等. 四川盆地长宁、焦石坝志留系龙马溪组页岩气刻度区精细解剖[J].天然气地球科学,2016,27(3):423-432. [11] 李博,魏国庆,洪克岩,等.中国南方盆外复杂构造区页岩气井评价与认识-以湖北来凤咸丰区块来页1井为例[J].天然气工业,2016,36(8):29~35. [12] 何江林,刘伟,杨平,等.四川盆地西南缘五峰组-龙马溪组页岩气形成条件与有利区优选[J].沉积与特提斯地质,2017,37(3):50-58. [13] 汪正江,余谦,杨平,等.川滇黔邻区龙马溪组页岩气富集主控因素与勘探方向[J].沉积与特提斯地质,2018, 38(3):1-15. [14] 杨平,汪正江,余谦,等.四川盆地西南缘五峰-龙马溪组页岩气资源潜力分析[J].中国地质, 2019,46(3):601-614. [15] 牟传龙,周恳恳,梁薇,等.中上扬子地区早古生代烃源岩沉积环境与油气勘探[J].地质学报,2011,85(4):526-532. [16] 牟传龙,王秀平,王启宇,等.川南及邻区下志留统龙马溪组下段沉积相与页岩气地质条件的关系[J].古地理学报,2016,18(3):457-472. [17] 叶和飞,罗建宁,李永铁,等.特提斯构造域与油气勘探[J]. 沉积与特提斯地质, 2000, 20(1):1-27. [18] 聂海宽,金之钧,马鑫,等.四川盆地及邻区上奥陶统五峰组-下志留统龙马溪组底部笔石带及沉积特征[J].石油学报, 2017,38(2):160-174. [19] Pan S Q, Zou C N, Yang Z, et al. Methods for shale gas play assessment:A comparison between Silurian Longmaxi shale and Mississippian Barnett shale[J]. Journal of Earth Science, 2015, 26(2):285-294.
[20] Kitty L M, William L E, Robert M R, et al. Grain assemblages and stronge diagenetic overprinting in siliceous mudrcoks, Barnet Shale Mississippian, Fort Worth Basin, Texas[J]. AAPG Bulletin,2012,96(8):1553-1578.
[21] Loucks R G, Reed R M, Stephen C R, et al. Spectrum of pore types and networks and a descriptive classification for matrix-related mud rock pores[J]. AAPG Bulletin, 2012, 96(6):1071-1098.
[22] 曹涛涛,宋之光. 页岩有机质特征对有机孔发育及储层的影响[J]. 特种油气藏, 2016, 23(4):7-13. [23] 林家善,刘建清,冯伟明,等.黔北下志留统龙马溪组烃源岩有机地球化学特征及其古环境意义[J].沉积与特提斯地质,2014,34(2):79-85. [24] 张旭,刘成林,朱炎铭,等.滇东北龙马溪组页岩气地质条件及有利区优选[J].天然气地球科学,2015,26(6):1190-1199. [25] 梁兴,王高成,徐政语,等.中国南方海相复杂山地页岩气储层甜点综合评价技术-以昭通国家级页岩气示范区为例[J].天然气工业, 2016,36(1):33~42. [26] 金之钧,胡宗全,高波,等.川东南地区五峰组-龙马溪组页岩气富集与高产控制因素[J].地学前缘, 2016,23(1):1-10. [27] 董大忠, 程克明, 王玉满, 等.中国上扬子区下古生界页岩气形成条件及特征[J]. 石油与天然气地质, 2010, 31(3):288-299. [28] 何治亮,聂海宽,张钰莹.四川盆地及其周缘奥陶系五峰组-志留系龙马溪组页岩气富集主控因素分析[J].地学前缘,2016,23(2):8-17. [29] 黄仁春,魏祥峰,王强.四川盆地东南缘丁山地区页岩气成藏富集的关键控制因素[J].海相油气地质, 2017,22(2):25-30. [30] 魏祥峰,李宇平,魏志红, 等.保存条件对四川盆地及周缘海相页岩气富集高产的影响机制[J].石油实验地质,2017,39(2):147-153. [31] 余谦,程锦翔,张海全,等.盐源地区古生界页岩气地质条件分析[J].沉积与特提斯地质,2020,40(03):118-128.
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