地址:四川省成都市高新区天府大道北段12号中国石油科技大厦

电话:028-86015441;028-86015319

邮箱:gaskk@petrochina.com.cn

QQ群:489323588

您所在位置:首页->过刊浏览->天勘2020.3


黔北地区五峰组—龙马溪组页岩储层特征分析
Characteristics on shale reservoirs of Wufeng-Longmaxi formations, northern Guizhou Province
张 福1 黄 艺2 戴岑璞3 李刚权1 蓝宝锋1 杜 洋4 唐柯夫4
点击:12次 下载:3次
DOI:
作者单位:1. 贵州乌江新能源开发有限责任公司 2. 贵州省土地矿产资源储备局  3. 中国石油川庆钻探工程有限公司地质勘探开发研究院 4. 成都华兴世纪能源公司
中文关键字:黔北地区 晚奥陶世 早志留世 五峰组 龙马溪组 页岩气 储层特征 脆性矿物含量
英文关键字:Northern Guizhou Province; Late Ordovician; Early Silurian; Wufeng Formation; Longmaxi Formation; Shale gas; Reservoir characteristics; Brittle mineral content.
中文摘要:    伴随国内页岩气勘探开发的深入,四川盆地勘探开发逐渐由盆内转向盆缘区域,尤其在黔北地区正安区块获得的勘探突破,更是使得该区域成为新的热点区。基于此,针对黔北地区上奥陶统五峰组—下志留统龙马溪组页岩储层,通过对钻井岩心观察及野外露头剖面地质调查,结合岩石薄片分析、扫描电镜观察和地球化学分析资料进行研究,对该区储层特征进行分析总结,以对该区域页岩气未来勘探开发提供相关依据和支持。研究结果表明:①储层有机碳含量集中分布于0.65% ~ 6.50% ;干酪根类型以腐泥型为主,已进入高成熟—过成熟早期演化阶段;②脆性矿物含量64.1% ~ 86.5%,平均79.4% ;孔隙度平均4.1%,基质渗透率平均0.002 mD ;③储层孔隙以有机质孔、矿物颗粒粒间微孔、晶间孔和次生溶蚀孔为主,裂缝较为发育;④岩心比表面平均为21.7 m2/g,微孔隙较为发育;⑤总含气量一般大于1 m3/t,最高达6.5 m3/t。同四川盆地内建产区块对比,该区储层具有高有机碳含量、高成熟度、高含气量、高脆性的特征,虽储层性质略差,但埋深较浅,具有较大的勘探潜力。
英文摘要:    As China shale-gas exploration and development advances further, its exploration and development in Sichuan Basin has gradually transited from inside the basin to the basin marginal area. In particular, an exploration breakthrough in Zheng'an block of northern Guizhou Province drives this area to be a new hot spot. So, the shale reservoirs of Upper Ordovician Wufeng Formation to Lower Silurian Longmaxi Formation in this area were studied by drilling core observation, field outcrop investigation, thin-section identification, SEM (scanning electron microscope) observation, and geochemical analysis. Then, the reservoir characteristics were summarized so as to provide the basis and support for next shale-gas exploration and development in this area. Results show that, for these reservoirs, (1) the total organic carbon (TOC) is concentrated in the range of 0.65%-6.50%, the kerogen is mainly I type and has entered the stage of high maturity-overmature early evolution; (2) the content of brittle mineral ranges from 64.1% to 86.5%, averaging 79.4%. The average porosity and matrix permeability are 4.1% and 0.002 mD, individually; (3) the pores are dominated by organic, intergranular, intercrystalline, and secondary dissolution pores, and fractures are relatively developed; (4) the specific surface area of cores averages 21.7 m2/g, and micropores are relatively developed; and (5) the total gas content is generally greater than 1 m3/ t, with the maximum of 6.5 m3/t. Compared with some productivity construction blocks in Sichuan Basin, the reservoirs in this study area are characterized by high TOC, maturity, gas content, and brittleness. Though their physical properties are poorer, the burial depth is smaller, resulting in a great exploration potential.
读者评论

      读者ID: 密码:   
我要评论:
国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
主管单位:中国石油西南油气田公司  主办单位:中国石油西南油气田公司勘探开发研究院
版权所有©2020天然气勘探与开发》编辑部 蜀ICP备10004100号
本系统由北京菲斯特诺科技有限公司设计开发
您是本站第3011653名访问者