新疆石油地质 ›› 2021, Vol. 42 ›› Issue (4): 410-417.doi: 10.7657/XJPG20210403

• 油气勘探 • 上一篇    下一篇

鄂尔多斯盆地胡154区块长4+5段孔隙结构定量表征及分类

丁强1a(), 成健1a, 杨博1a, 靳紫馨1b, 刘菲2, 赵子文3, 于景维3()   

  1. 1.中国石油 长庆油田分公司 a.第六采油厂;b.第一采气厂,陕西 西安 710016
    2.中国石油 西南油气田分公司 重庆气矿,重庆 400700
    3.中国石油大学(北京)克拉玛依校区,新疆 克拉玛依 834000
  • 收稿日期:2021-03-05 修回日期:2021-05-07 出版日期:2021-08-01 发布日期:2021-08-09
  • 通讯作者: 于景维 E-mail:154890709@qq.com;yyjjww-1985@163.com
  • 作者简介:丁强(1984-),男,四川绵阳人,工程师,油气田开发,(Tel)15769221984(E-mail) 154890709@qq.com
  • 基金资助:
    国家科技重大专项(2011ZX05001-005-01);新疆自治区自然科学基金面上项目(2021D01A201);中国石油大学(北京)克拉玛依校区人才引进项目(RCYJ2016B-01-010);克拉玛依市科技局项目(2019RC001A)

Quantitative Characterization and Classification of Pore Structures in Chang 4+5 Member in Block Hu-154, Ordos Basin

DING Qiang1a(), CHENG Jian1a, YANG Bo1a, JIN Zixin1b, LIU Fei2, ZHAO Ziwen3, YU Jingwei3()   

  1. 1. PetroChina Changqing Oilfield Company, a.The Sixth Oil Production Plant; b.The First Gas Recovery Plant, Xi’an, Shaanxi 710016, China
    2. Chongqing Gas Field, Southwest Oil and Gas Field Company, PetroChina, Chongqing 400700, China
    3. Karamay Campus, China University of Petroleum (Beijing), Karamay, Xinjiang 834000, China
  • Received:2021-03-05 Revised:2021-05-07 Online:2021-08-01 Published:2021-08-09
  • Contact: YU Jingwei E-mail:154890709@qq.com;yyjjww-1985@163.com

摘要:

鄂尔多斯盆地胡尖山油田胡154区块三叠系延长组长4+5段属于低孔低渗储集层,孔隙结构相关研究较少,缺乏详细定量化分析,导致胡154区块产量下降较快,水驱控制程度不高。为定量表征研究区目的层孔隙结构,利用岩心、薄片、铸体薄片、扫描电镜、高压压汞及相渗实验资料,对孔隙结构进行定量表征及分类,结合测井曲线,对不同类型孔隙结构储集层在平面上的分布进行研究。结果表明,研究区长4+5段孔隙类型以剩余粒间孔为主,喉道类型主要为片状和弯片状。孔隙结构划分为3类:Ⅰ类孔隙结构分形维数分布于2.57~2.61,排驱压力平均为1.62 MPa,日产油量2 t以上;Ⅱ类孔隙结构分形维数分布于2.61~2.66,排驱压力平均为2.61 MPa,日产油量1~2 t;Ⅲ类孔隙结构分形维数分布于2.66~2.71,排驱压力平均为3.52 MPa,日产油量小于1 t。具有Ⅱ类孔隙结构和Ⅲ类孔隙结构的储集层在平面上分布较广,长(4+5)2孔隙结构相对好于长(4+5)1

关键词: 鄂尔多斯盆地, 胡尖山油田, 胡154区块, 延长组, 储集层, 长4+5段, 孔隙结构, 定量表征

Abstract:

In Block Hu-154 of Hujianshan oilfield in the Ordos basin, the reservoirs of Chang 4+5 member in the Triassic Yanchang formation are of low porosity and low permeability, and there are few researches on the pore structures of the reservoirs and detailed quantitative analysis, which may be the cause for the rapid production decline and less waterflooding control in this block. Based on the data of cores, slices, cast thin sections, SEM, high-pressure mercury intrusion and phase permeability experiments, quantitative characterization and classification of the pore structures have been carried out, and the plane distribution of the pore structures has been studied by combining with well logging curves in the study area. The results show that residual intergranular pores and flake-like and curved flake-like throats are dominant in the Chang 4+5 member in the study area. According to the structure, the pores can be divided into three types: (1) Type Ⅰ pores: the fractal dimension is 2.57~2.61, the average displacement pressure is 1.62 MPa and the oil production rate is over 2 t/d; (2) Type Ⅱpores: the fractal dimension is 2.61~2.66, the average displacement pressure is 2.61 MPa and the oil production rate is higher than 1~2 t/d; (3) Type Ⅲ pores: the fractal dimension is 2.66~2.71, the average displacement pressure is 3.52 MPa and the oil production rate is lower than 1 t/d. Reservoirs with Type II and III pores are distributed on a large scale, and the pore structure in the Chang (4+5)2 is better than that in the Chang (4+5)1 in the study area.

Key words: Ordos basin, Hujianshan oilfield, Block Hu-154, Yanchang formation, reservoir, Chang 4+5 member, pore structure, quantitative characterization

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