断陷盆地致密砂砾岩储层甜点综合评价及勘探成效——以松辽盆地北部徐家围子断陷下白垩统沙河子组为例

doi:10.3969/j.issn.1672-7703.2022.05.007

摘要/Abstract

摘要： 松辽盆地北部徐家围子断陷下白垩统沙河子组物源近、相变快、非均质性强、源储叠置发育，具备形成致密气藏的地质条件。研究表明：沙河子组储层致密，结构成熟度较低，储层流动孔喉半径下限为20nm，致密储层成储孔喉半径上限为0.4μm。沙河子组样品核磁共振与高压压汞分析揭示储层物性受沉积物粒径影响较大，首先按照致密砂岩、砂砾岩等不同岩性划分储层类型；然后根据单井产量受孔隙度、储层厚度、泥质含量等因素综合影响，创新了断陷盆地致密储层先分类、后分型的甜点评价方法。全区共划分31个甜点区、识别230个甜点体，断陷北部安达地区为首选甜点区，扇三角洲前缘水下分流河道微相、席状砂微相、河口沙坝微相甜点体更发育，为勘探部署提供了指导。

关键词: 徐家围子断陷, 沙河子组, 致密砂砾岩, 甜点综合评价, 勘探成效

Abstract: Reservoir of the Lower Cretaceous Shahezi Formation in Xujiaweizi Fault Depression in the northern Songliao Basin is characterized by close provenance, rapid facies change, strong heterogeneity and superimposed source rock and reservoir, which has geological conditions for the accumulation of tight gas reservoir. The study results show that reservoir of Shahezi Formation is tight with low textural maturity. The lower limit of pore throat for fluid flow is 20 nm and the upper limit of pore throat is 0.4 μm of the tight reservoir. NMR and high pressure mercury injection experiments on core samples of Shahezi Formation indicate that the reservoir physical properties were greatly affected by sediment grain size. Firstly, the reservoir types are classified according to different lithologies such as tight sandstone and glutenite. Then the sweet spot evaluation method of “subdivision after classification” is innovatively researched for tight reservoirs in fault basin based on the comprehensive factors such as porosity, reservoir thickness, and shale content affecting on single well production. As a result, 31 sweet spot areas are divided in the entire area and totally 230 sweet spot bodies are identified. Among them, Anda area in the northern Xujiaweizi Fault Depression is an optimal sweet spot area, with sweet spot bodies of the underwater distributary channel, sheet sandstone and channel mouth bar microfacies of delta front facies are well developed, which provides guidance for the exploration deployment in this area.

中图分类号:

TE122.24

张大智, 初丽兰, 李鑫, 王晓莲. 断陷盆地致密砂砾岩储层甜点综合评价及勘探成效——以松辽盆地北部徐家围子断陷下白垩统沙河子组为例[J]. 中国石油勘探, 2022, 27(5): 73-82.

Zhang Dazhi, Chu Lilan, Li Xin, Wang Xiaolian. Comprehensive sweet point evaluation and exploration results of tight glutenite reservoir in fault basin-a case study of the Lower Cretaceous Shahezi Formation in Xujiaweizi Fault Depression in the northern Songliao Basin[J]. China Petroleum Exploration, 2022, 27(5): 73-82.

参考文献

[1] 邹才能，朱如凯，吴松涛，等. 常规与非常规油气聚集类型、特征、机理及展望：以中国致密油和致密气为例[J]. 石油学报，2012，33(2):173-187.
Zou Caineng, Zhu Rukai, Wu Songtao, et al . Types,characteristics, genesis and prospects of concentional and unconventional hydrocarbon accumulations: taking tight oil and tight gas in China as an instance[J]. Acta Petrolei Sinica,2012,33(2):173-187.
[2] 张国生，邓松涛. 我国致密砂岩气资源潜力、分布与未来发展地位[J].中国工程科学，2012,14(6):87-93.
Zhang Guosheng, Deng Songtao. Resource evaluation,position and distribution of tight sandstone gas in China[J]. Engineering Sciences, 2012,14(6):87-93.
[3] 迟元林，云金表，蒙启安，等. 松辽盆地深部结构及成盆动力学与油气聚集[M]. 北京: 石油工业出版社，2002:113-221.
Chi Yuanlin, Yun Jinbiao, Meng Qi’an, et al . Deeped structure,basin-forming dynamics and hydrocarbon accumulation in Songliao Basin[M]. Beijing: Petroleum Industry Press,2002:113-221.
[4] 任延广，朱德丰，万传彪，等. 松辽盆地北部深层地质特征及天然气勘探方向[J]. 中国石油勘探，2004,9(4):12-18.
Ren Yanguang, Zhu Defeng, Wan Chuanbiao, et al . Geological characteristics of deep layers in northern part of Songliao Basin and orientation for natural gas exploration[J]. China Petroleum Exploration, 2004,9(4):12-18.
[5] 杨茜，付玲. 致密砂岩气的成藏机理及勘探前景[J]. 断块油气田，2012,19(3):302-306.
Yang Qian, Fu Ling. Accumulation mechanism of tight sandstone gas reservoir and its exploration prospects[J]. Fault-Block Oil & Gas Field, 2012,19(3):302-306.
[6] 章雄，潘和平，骆淼，等. 致密砂岩气层测井解释方法综述[J]. 工程地球物理学报，2005,2(6):431-436.
Zhang Xiong, Pan Heping, Luo Miao, et al . Summary of logging interpretation for gas-bearing tight sandstone[J].Chinese Journal of Engineering Geophysics, 2005,2(6):431-436.
[7] 李建忠，郭彬程，郑民，等. 中国致密砂岩气主要类型、地质特征与资源潜力[J]. 天然气地球科学，2012,23(4):607-615.
Li Jianzhong, Guo Bincheng, Zheng Min, et al . Main types,geological features and resource potential of tight sandstone gas in China[J]. Natural Gas Geoscience, 2012,23(4):607-615.
[8] 杨涛，张国生，梁坤，等. 全球致密气勘探开发及中国发展局势预测[J]. 中国工程科学，2012,14(6):64-68.
Yang Tao, Zhang Guosheng, Liang Kun, et al . The exploration of global tight sandstone gas and forecast of the development tendency in China[J]. Engineering Sciences, 2012,14(6):64-68.
[9] 邹才能，杨智，张国生，等. 常规—非常规油气“有序聚集”理论认识及时间意义[J]. 石油勘探与开发，2014,41(1):14-27.
Zou Caineng, Yang Zhi, Zhang Guosheng, et al . Conventional and unconventional petroleum“orderly accumulation”: concept and practical significance[J]. Petroleum Exploration and Development, 2014,41(1):14-27.
[10] 童晓光，郭彬程，李建忠，等. 中美致密砂岩气成藏分布异同点比较研究与意义[J]. 中国工程科学，2012,14(6):9-15.
Tong Xiaoguang, Guo Bincheng, Li Jianzhong, et al .Comparison study on accumulation & distribution of tight sandstone gas between China and the United States and its significance[J]. Engineering Sciences, 2012,14(6): 9-15.
[11] 张春林，李剑，刘锐娥. 鄂尔多斯盆地盒8 段致密砂岩气储层微观特征及其形成机理[J]. 中国石油勘探，2019,24(4):476-484.
Zhang Chunlin, Li Jian, Liu Ruie. Microscopic characteristics and forming mechanisms of He 8th member tight sandstone gas reservoirs in Ordos Basin[J]. China Petroleum Exploration,2019,24(4):476-484.
[12] 唐雁刚，杨宪彰，谢会文，等. 塔里木盆地库车坳陷侏罗系阿合组致密气藏特征与勘探潜力[J]. 中国石油勘探，2021,26(4):113-124.
Tang Yangang, Yang Xianzhang, Xie Huiwen, et al . Tight gas reservoir characteristics and exploration potential of Jurassic Ahe Formation in Kuqa Depression, Tarim Basin[J]. China Petroleum Exploration, 2021,26(4):113-124.
[13] 杨春龙，苏楠，芮宇润，等. 四川盆地中侏罗统沙溪庙组致密气成藏条件及勘探潜力[J]. 中国石油勘探，2021,26(6):98-109.
Yang Chunlong, Su Nan, Rui Yurun, et al . Gas accumulation conditions and exploration potential of tight gas reservoir of the Middle Jurassic Shaximiao Formation in Sichuan Basin[J].China Petroleum Exploration, 2021,26(6):98-109.
[14] 米立军，朱光辉. 鄂尔多斯盆地东北缘临兴—神府致密气田成藏地质特征及勘探突破[J]. 中国石油勘探，2021,26(3):53-67.
Mi Lijun, Zhu Guanghui. Geological characteristics and exploration breakthrough in Linxing-Shenfu Tight Gas Field,northeastern Ordos Basin[J]. China Petroleum Exploration,2021,26(3):53-67.
[15] 李国欣，朱如凯. 中国石油非常规油气发展现状、挑战与关注问题[J].中国石油勘探，2020,25(2):1-13.
Li Guoxin, Zhu Rukai. Progress, challenges and key issues in the unconventional oil and gas development of CNPC[J]. China Petroleum Exploration, 2020,25(2):1-13.
[16] 赵政璋，杜金虎. 非常规油气资源现实的勘探开发领域: 致密油气[M].北京：石油工业出版社，2012.
Zhao Zhengzhang, Du Jinhu. Exploration and development of unconventional oil and gas resources: tight oil and gas[M].Beijing: Petroleum Industry Press, 2012.
[17] 邹才能，杨智，陶世振，等. 纳米油气与源储共生型油气聚集[J]. 石油勘探与开发，2012,39(1):13-26.
Zou Caineng, Yang Zhi, Tao Shizhen, et al . Nano-hydrocarbon and the accumulation in coexisting source and reservoir[J].Petroleum Exploration and Development, 2012, 39(1):13-26.
[18] 董晓霞，梅廉夫，全永旺. 致密砂岩气藏的类型和勘探前景[J]. 天然气地球科学，2007,18(3):351-355.
Dong Xiaoxia, Mei Lianfu, Quan Yongwang. Types of tight sand gas accumulation and its exploration prospect[J]. Natural Gas Geoscience, 2007,18(3):351-355.
[19] 陆加敏，刘超. 断陷盆地致密砂砾岩气成藏条件和资源潜力：以松辽盆地徐家围子断陷下白垩统沙河子组为例[J]. 中国石油勘探，2016,21(2):53-60.
Lu Jiamin, Liu Chao. Accumulation conditions and resource potential of tight glutenite gas in fault depression basins:a case study on Lower Cretaceous Shahezi Formation in Xujiaweizi Fault Depression, Songliao Basin[J]. China Petroleum Exploration, 2016,21(2):53-60.
[20] 张晓东，于晶，张大智，等. 徐家围子断陷沙河子组致密气成藏条件及勘探前景[J]. 大庆石油地质与开发，2014,33(5):86-91.
Zhang Xiaodong, Yu Jing，Zhang Dazhi, et al . Accumulation conditions and exploration prospects for Shahezi Formation tight sandstone gas in Xujiaweizi Fault Depression[J]. Petroleum Geology & Oilfield Development in Daqing，2014,33(5):86-91.
[21] 张大智，初丽兰，王晓莲. 利用成像测井资料分析砂砾岩沉积特征：以徐家围子断陷安达地区下白垩统沙河子组为例[J]. 沉积学报，2018,36(3):584-595.
Zhang Dazhi, Chu Lilan, Wang Xiaolian. Using FMI data to analysis the sedimentary characteristics of glutenite: a case study from the Lower Cretaceous Shahezi Formation in the Anda area, Xujiaweizi Fault Depression, NE China[J]. Acta Sedimentologica Sinica, 2018,36(3):584-595.
[22] 郭思祺，肖佃师，卢双舫，等. 徐家围子断陷沙河子组致密储层孔径分布定量表征[J]. 中南大学学报( 自然科学版)，2016,47(11):3742-3751.
Guo Siqi, Xiao Dianshi, Lu Shuangfang, et al . Quantificational characterization of tight reservoir pore size distribution of Shahezi Formation in Xujiaweizi Fault Depression[J]. Journal of Central South University(Science and Technology), 2016,47(11):3742-3751.
[23] 王伟明，赵旭，孙计文，等. 致密砂岩气资源潜力关键参数确定方法：以吐哈盆地为例[J]. 石油与天然气地质，2014,35(2):258-265.
Wang Weiming, Zhao Xu, Sun Jiwen, et al . Key parameter selection for tight gas resource potential：a case from Turfan-Hami Basin[J]. Oil & Gas Geology, 2014,35(2):258-265.