柴达木盆地东坪基岩气藏裂缝发育规律研究

doi:10.11885/j.issn.1674-5086.2017.11.15.01

摘要/Abstract

摘要： 东坪基岩气藏位于柴达木盆地西北部阿尔金山前东段，是新近发现的中国内陆盆地最大规模基岩古潜山整装气藏。但由于该区基底片麻岩、花岗岩天然裂缝及溶蚀孔洞发育，且成因复杂，非均质性强，单井产量差异大，该气藏的规模上产开发存在较大难度。裂缝是影响基岩储层高产稳产的关键因素，因此，开展该气藏的裂缝发育规律及综合预测研究显得格外重要。为此，在认识其岩性、物性和气藏类型基础上，基于岩芯、薄片以及成像测井等进行了分析统计，明确了东坪基岩以构造缝为主，两类溶蚀裂缝为辅的裂缝系统。通过单井统计结果标定，实现研究区岩性分带，基于叠后振幅方位分解技术实现研究区裂缝平面展布预测。最终结合产能统计分析，通过不同岩性带、不同裂缝类型与产能及改造效果的相对关系，将研究区划分为3个有效裂缝发育区，其中，一个自然产能高效区，两个措施改造潜力区，实现了对研究区储层的综合预测，预测结果与实际产能吻合率均达70%以上，为后续开发调整提供支撑。

关键词: 柴达木盆地, 基岩气藏, 构造缝, 裂缝发育带, 叠后振幅方位分解

Abstract: Located in the front eastern section of the Altyn-Tagh in the northwestern Qaidam Basin, the Dongping bedrock reservoir is the largest complete bedrock buried hill gas reservoir recently discovered in the terrestrial basins of China. Nevertheless, due to natural fractures in gneiss and granite bedrocks and karst caves in the region and their complex formations, the area is highly heterogeneous with significant yield differences between wells. In addition, mass exploitation of a large-scale gas reservoir is relatively difficult. Because fractures are the key factor in allowing high and stable yields of bedrock reservoirs, it is especially important to conduct research on patterns and comprehensive predictions of fracture development in the reservoir of interest. Hence, lithological and physical properties and reserve types of the reservoir were examined, followed by statistical analyses based on core samples, thin sections, and well imaging. We found that the fracture system of the Dongping bedrock reservoir is dominated by tectonic fractures, accompanied by two types of dissolution fractures. The statistics of individual wells were used as standards to divide the study area according to its lithology. The Post-Stack Amplitude Direction Decomposition (PADD) technique was employed to predict the horizontal distribution of fractures in the study area. Finally, the results were integrated and analyzed with yield data. According to the relative relationships between different lithological zones, different fracture types, yields, and transformation effects, the study area was divided into three effective fracture development zones. One is a natural high-yield zone, while the other two are potential areas requiring appropriate transformation measures. Comprehensive predictions of reservoir potential in the study area were performed, and the predicted results matched actual yields at a rate higher than 70%.

Key words: Qaidam Basin, bedrock gas reservoirs, tectonic fractures, fracture development zones, post-stack amplitude direction decomposition

中图分类号:

TE122

李翔, 刘应如, 柴小颖, 龙伟, 白亚东. 柴达木盆地东坪基岩气藏裂缝发育规律研究[J]. 西南石油大学学报(自然科学版), 2019, 41(1): 68-76.

LI Xiang, LIU Yingru, CHAI Xiaoying, LONG Wei, BAI Yadong. Patterns and Comprehensive Predictions of Fracture Development in Bedrock Gas Reservoirs in Dongping, Qaidam Basin[J]. 西南石油大学学报(自然科学版), 2019, 41(1): 68-76.

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参考文献

[1] 付锁堂,马达德,陈琰,等. 柴达木盆地阿尔金山前东段天然气勘探[J]. 中国石油勘探, 2015, 20(6):1-13. doi:10.3969/j.issn.1672-7703.2015.06.001 FU Suotang, MA Dade, CHEN Yan, et al. Natural gas exploration in eastern segment of Alkin Piedmont, Northern Qaidam Basin[J]. China Petroleum Exploration, 2015, 20(6):1-13. doi:10.3969/j.issn.1672-7703.2015.06.001
[2] 马龙,刘全新,张景廉,等. 论基岩油气藏的勘探前景[J]. 天然气工业, 2006, 26(1):8-11. doi:10.3321/j.-issn:1000-0976.2006.01.003 MA Long, LIU Quanxin, ZHANG Jinglian, et al. A discussion of exploration potentials of basement hydrocarbon reservoir[J]. Natural Gas Industry, 2006, 26(1):8-11. doi:10.3321/j.issn:1000-0976.2006.01.003
[3] 马峰,乐幸福,王朴,等. 柴达木盆地煤型气成藏条件及勘探领域[J]. 中国石油勘探, 2014, 19(3):87-94. doi:10.3969/j.issn.1672-7703.2014.03.011 MA Feng, LE Xingfu, WANG Pu, et al. Accumulation conditions and exploration domain of coal-type gas in Qaidam Basin[J]. China Petroleum Exploration, 2014, 19(3):87-94. doi:10.3969/j.issn.1672-7703.2014.03.011
[4] 孙秀建,阎存凤,张永庶,等. 柴达木盆地阿尔金山前基岩气藏成藏条件分析[J]. 特种油气藏, 2015, 22(1):75-78. doi:10.3969/j.issn.1006-6535.2015.01.016 SUN Xiujian, YAN Cunfeng, ZHANG Yongshu, et al. Analysis on accumulation conditions of basement gas reservoir of Altyntagh Front, Caidam Basin[J]. China Petroleum Exploration, 2015, 22(1):75-78. doi:10.3969/j.-issn.1006-6535.2015.01.016
[5] 黄建红,谭先锋,程承吉,等. 花岗质基岩风化壳结构特征及油气地质意义:以柴达木盆地东坪地区基岩风化壳为例[J]. 地球科学, 2016, 41(12):2041-2060. doi:10.3799/dqkx.2016.528 HUANG Jianhong, TAN Xianfeng, CHENG Chengji, et al. Structural features of wearthering crust of granitic basement rock and its petroleum geological significance:A case study of basement wearthering crust of Dongping Area in Qaidam Basin[J]. Earth Science, 2016, 41(12):2041-2060. doi:10.3799/dqkx.2016.528
[6] 伍劲,高先志,马达德,等. 柴达木盆地东坪地区基岩风化壳特征[J]. 现代地质, 2017, 31(1):129-141. doi:10.3969/j.issn.1000-8527.2017.01.011 WU Jin, GAO Xianzhi, MA Dade, et al. Characteristics of the basement weathering crust in Dongping Area, Qaidam Basin[J]. Geoscience, 2017, 31(1):129-141. doi:10.3969/j.issn.1000-8527.2017.01.011
[7] 李江涛,李志军,贾永禄,等. 柴达木盆地东坪基岩气藏的特殊地质条件及其开发模式探讨[J]. 开发工程, 2014, 34(8):75-81. LI Jiangtao, LI Zhijun, JIA Yonglu, et al. Special geological conditions and development modes of the Dongping basement gas reservoirs in the Qaidam Basin[J]. Development Engineering, 2014, 34(8):75-81.
[8] 曹正林,魏志福,张小军,等. 柴达木盆地东坪地区油气源对比分析[J]. 岩性油气藏, 2013, 25(3):17-20, 42. doi:10.3969/j.issn.1673-8926.2013.03.003 CAO Zhenglin, WEI Zhifu, ZHANG Xiaojun, et al. Oil-gas source correlation in Dongping Area, Qaidam Basin[J]. Lithologic Reservoirs, 2013, 25(3):17-20, 42. doi:10.3969/j.issn.1673-8926.2013.03.003
[9] 李婷,夏志远,刘小平,等. 柴达木盆地东坪地区基岩气藏成藏条件分析[J]. 特种油气藏, 2015, 22(5):69-73. doi:10.3969/j.issn.1006-6535.2015.05.014 LI Ting, XIA Zhiyuan, LIU Xiaoping, et al. Hydrocarbon accumulation condition analysis of bedrock gas reservoirs in Dongping of Qaidam Basin[J]. Special Oil and Gas Reservoirs, 2015, 22(5):69-73. doi:10.3969/j.issn.1006-6535.2015.05.014
[10] 黄继新,彭仕宓,王小军,等. 成像测井资料在裂缝和地应力研究中的应用[J]. 石油学报, 2006, 27(6):65-69. doi:10.7623/syxb200606017 HUANG Jixin, PENG Shibi, WANG Xiaojun, et al. Applications of imaging logging data in the research of fracture and ground stress[J]. Acta Petrolei Sinica, 2006, 27(6):65-69. doi:10.7623/syxb200606017
[11] 赖生华,余谦,周文,等. 楚雄盆地北部上三叠统罗系裂缝发育期次[J]. 地球科学, 2004, 31(5):25-29. doi:10.3321/j.issn:1000-0747.2004.05.006 LAI Shenghua, YU Qian, ZHOU Wen, et al. Development periods of fracture in the late Triassic-Jurassic in the north Chuxiong Basin[J]. Earth Science, 2004, 31(5):25-29. doi:10.3321/j.issn:1000-0747.2004.05.006
[12] 张审琴,段生盛,魏国,等. 柴达木盆地复杂基岩气藏储层参数测井评价[J]. 天然气工业, 2014, 34(9):52-58. doi:10.3787/j.issn.1000-0976.2014.09.008 ZHANG Shenqin, DUAN Shengsheng, WEI Guo, et al. Logging evaluation of parameters for the complex basement gas reservoir in the Qaidam Basin[J]. Natural Gas Industry, 2014, 34(9):52-58. doi:10.3787/j.issn.1000-0976.2014.09.008
[13] 丁文龙,漆立新,吕海涛,等. 利用FMI资料分析塔河油田南部中-下奥陶统储层构造应力场次J. 现代地质, 2009, 23(5):853-858. doi:10.3969/j.issn.1000-8527.2009.05.013 DING Wenlong, QI Lixin, LÜ Haitao, et al. Analysis of the lower-middle Ordovician reservoir tectonic stress field using FMI data in the south of Tahe Oilfield[J]. Geoscicence, 2009, 23(5):853-858. doi:10.3969/j.issn.1000-8527.2009.05.013
[14] 牛虎林,胡欣,徐志强,等. 基岩油气藏裂缝性储层的成像测井评价及裂缝预测[J]. 石油学报, 2010, 31(2):264-269. doi:10.7623/syxb201002014 NIU Hulin, HU Xin, XU Zhiqiang, et al. Evaluation of imaging logging and fracture prediction in fractured basement reservoirs[J]. Acta Petrolei Sinica, 2010, 31(2):264-269. doi:10.7623/syxb201002014
[15] 童亨茂. 成像测井资料在构造裂缝预测和评价中的应用[J]. 天然气工业, 2006, 26(9):58-61. doi:10.3321/-j.issn:1000-0976.2006.09.017 TONG Hengmao, et al. Applications of imaging logging data in the research of fracture and ground stress[J]. Natural Gas Industry, 2006, 26(9):58-61. doi:10.3321/j.issn:-1000-0976.2006.09.017
[16] 张攀,胡明,何冰,等. 东营凹陷太古界基岩储层主控因素分析[J]. 断块油气田, 2011, 18(1):18-22. ZHANG Pan, HU Ming, HE Bing, et al. Analysis on main controlling factors of Archaeozoic base rock reservoir in Dongying Depression[J]. Fault-Block Oil and Gas Field, 2011, 18(1):18-22.
[17] 吴颜雄,马达德,刘君林,等. 柴西地区基岩油藏形成的石油地质条件分析[J]. 天然气地球科学, 2014, 25(11):1689-1696. doi:10.11764/j.issn.-1672-1926.2014.11.1689 WU Yanxiong, MA Dade, LIU Junlin, et al. Geological conditions of basement oil pools in western Qaidam Basin[J]. Earth Science, 2014, 25(11):1689-1696. doi:10.11764/j.issn.1672-1926.2014.11.1689
[18] 任德生. 松辽盆地火山岩裂缝形成机理及预测研究——以徐家围子断陷芳深9井区为例[D]. 吉林:吉林大学, 2003.
[19] 曹正林,孙秀建,汪立群,等. 柴达木盆地阿尔金山前东坪——牛东斜坡带天然气成藏条件[J]. 天然气地球科学, 2013, 24(6):1125-1131. CAO Zhenglin, SUN Xiujian, WANG Liqing, et al. The gas accumulation conditions of Dongping-Niudong slope area in front of Aerjin Mountaion of Qaidam Basin[J]. Natural Gas Geoscience, 2013, 24(6):1125-1131.
[20] 曾联波,周天伟. 塔里木盆地库车坳陷储层裂缝分布规律[J]. 天然气工业, 2004, 24(9):23-28. doi:10.3321/-j.issn:1000-0976.2004.09.007 ZENG Lianbo, ZHOU Tianwei. Reservoir fracture distribution law of Kuche Depression in Talimu Basin[J]. Natural Gas Industry, 2004, 24(9):23-28. doi:10.3321/j.issn:-1000-0976.2004.09.007
[21] 彭渊,马寅生,刘成林,等. 柴达木盆地北缘晚海西-印支期古构造应力分析[J]. 地球学报, 2015, 36(1):51-59. doi:10.975/cagsb.2015.01.06 PENG Yuan, MA Yansheng, LIU Chenglin, et al. An analysis of late Hercynian-Indosinian paleotectonic stress on the northern margin of the Qaidam Basin[J]. Acta Geoscientica Sinica, 2015, 36(1):51-59. doi:10.975/cagsb.-2015.01.06
[22] 曾联波,巩磊,祖克威,等. 柴达木盆地西部古近系储层裂缝有效性的影响因素[J]. 地质学报,2012,86(11):1809-1814. doi:10.3969/j.issn.0001-5717.2012.11.010 ZENG Lianbo, GONG Lei, ZU Kewei, et al. Influence fractors on fracture validity of the Paleogene reservoir, western Qaidam Basin[J]. Acta Geologica Sinica, 2012, 86(11):1809-1814. doi:10.3969/j.issn.0001-5717.2012.-11.010
[23] 康治. 升平气田白垩系营城组火山岩储层特征与预测[J]. 世界地质, 2002, 21(2):130-134. doi:10.3969/-j.issn.1004-5589.2002.02.005 KANG Zhi. Reservoir Bed's Characteristics and forecast of volcanic rocks in Yingcheng Group of Cretaceous in Shengping Gas Field[J]. World Geology, 2002, 21(2):130-134. doi:10.3969/j.issn.1004-5589.2002.02.005