岩性油气藏 ›› 2019, Vol. 31 ›› Issue (3): 45–54.doi: 10.12108/yxyqc.20190306

• 油气地质 • 上一篇    下一篇

杭锦旗地区J58井区下石盒子组气水分布及其控制因素

段治有1,2,3, 李贤庆1,2, 陈纯芳3, 马立元3, 罗源3,4   

  1. 1. 中国矿业大学(北京)煤炭资源与安全开采国家重点实验室, 北京 100083;
    2. 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083;
    3. 中国石化石油勘探开发研究院, 北京 100083;
    4. 中国石油大学(北京)地球科学学院, 北京 102249
  • 收稿日期:2018-12-09 修回日期:2019-03-01 出版日期:2019-05-21 发布日期:2019-05-06
  • 第一作者:段治有(1992-),男,中国矿业大学(北京)在读硕士研究生,研究方向为油气地质。地址:(100083)北京市海淀区学院路丁11号中国矿业大学(北京)。Email:dzyou92@163.com
  • 通信作者: 李贤庆(1967-),男,博士,教授,主要从事煤油气地质、有机地球化学、岩石学等方面的教学和科研工作。Email:Lixq@cumtb.edu.cn。
  • 基金资助:
    国家重大科技专项“中西部重点碎屑岩层系油气富集规律与勘探方向”（编号：2016ZX05002-006）、“库车深层致密砂岩气藏成藏过程与富集规律”（编号：2016ZX05007-003）和中国石油化工股份有限公司科技部项目“杭锦旗地区上古生界气水分布规律研究”(编号：P16077)联合资助

Gas and water distribution and its controlling factors of Xiashihezi Formation in J58 well area,Hangjinqi area

DUAN Zhiyou1,2,3, LI Xianqing1,2, CHEN Chunfang3, MA Liyuan3, LUO Yuan3,4   

  1. 1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology(Beijing), Beijing 100083, China;
    2. College of Geosciences and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;
    3. SINOPEC Research Institute of Petroleum Exploration and Production, Beijing 100083, China;
    4. School of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China
  • Received:2018-12-09 Revised:2019-03-01 Online:2019-05-21 Published:2019-05-06

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摘要： J58井区下石盒子组是杭锦旗地区致密砂岩气勘探开发的重点层段，目前对其气水分布关系以及影响因素认识不清，极大地制约了天然气的有效开发。在研究区地质特征研究的基础上，通过对该区30余口井的测井资料、试气资料及地层水化学资料的综合分析，弄清了J58井区的气水分布规律及主控因素。结果表明：该区地层水矿化度为24 176~76 917 mg/L，地层水水型为CaCl2型，反映了地层水封闭性好，有利于天然气的聚集和保存。纵向上气水分异不明显，气水层连续性差，多数为气水同层，盒1段气层较发育。平面上气层集中分布于河道砂体连片区，水层主要位于砂体边部。气水分布主要受生烃强度、沉积相、有效砂体厚度及含砾砂岩厚度等因素控制，气层主要分布在生烃强度大于15亿m3/km2的区域，储集层距烃源岩越近，气层相对更发育；沉积相、有效砂体厚度和含砾砂岩厚度进一步控制着气产量及气、水层的展布范围。该研究成果对确定研究区天然气有利靶区具有指导作用。

关键词: 致密砂岩气, 气水分布, 控制因素, 下石盒子组, 鄂尔多斯盆地

Abstract: Xiashihezi Formation in J58 well area is a key section of tight sandstone gas exploration and development in Hangjinqi area. At present, the distribution of gas and water and its influencing factors are not clearly understood, which greatly restricts the effective development of natural gas. Based on the study of geological characteristics of the study area, through comprehensive analysis of logging data, gas test data and formation water chemistry of more than 30 wells in this area, the distribution law of gas and water and the main controlling factors in J58 well area were defined. The results show that the salinity of formation water in this area is 24 176-76 917 mg/L, and the formation water types are all CaCl2, which reflects that the formation water is well sealed and conducive to the accumulation and preservation of natural gas. Vertically, gas and water differentiation is not obvious, the continuity of gas and water layer is poor and most of them are coexisting gas and water zone, and the gas reservoir of He 1 member is more developed. In the plane, gas layers are concentrated in the channel sand bodies, while water layers are mainly located at the edge of sand bodies. The distribution of gas and water is mainly controlled by hydrocarbon generating intensity, sedimentary facies, effective sand body thickness and pebbly sandstone thickness. Gas reservoirs are mainly distributed in areas where hydrocarbon generation intensity is greater than 15×108 m3/km2. The closer the distance between reservoirs and hydrocarbon source rocks, the more developed the gas reservoirs are. Sedimentary facies, effective sand body thickness and pebbly sandstone thickness further control gas production and the distribution range of gas and water layers. The results of this study have a guiding role in determining the favorable target areas for natural gas in the study area.

Key words: tight sandstone gas, gas and water distribution, controlling factors, Xiashihezi Formation, Ordos Basin

中图分类号: 

  • TE132.2
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