油气地质

应用恒速压汞技术研究致密油储层微观孔喉特征———以鄂尔多斯盆地上三叠统延长组为例

  • 陈可洋
展开
  • 1.中国石油长庆油田分公司勘探开发研究院,陕西西安710018; 2.低渗透油气田勘探开发国家工程实验室,陕西西安710018
李卫成(1971-),男,工程师,硕士,主要从事油藏评价、储层综合研究方面的工作。地址:(710018)陕西省西安市未央区长庆兴隆园小区长庆油田公司勘探开发研究院油藏评价室。E-mail:liwc_cq@petrochina.com.cn

网络出版日期: 2012-12-20

基金资助

中国石油天然气股份公司重大科技专项“鄂尔多斯盆地致密油勘探开发关键技术研究”(编号:2011E-2602)资助

Application of constant-rate mercury penetration technique to study of pore throat characteristics of tight reservoir: A case study from the Upper Triassic Yanchang Formation in Ordos Basin

  • CHEN Keyang
Expand
  • 1. Research Institute of Exploration and Development, Petrochina Changqing Oilfield Company, Xi’an 710018, China; 2. National Engineering Laboratory of Exploration and Development of Low-permeability Oil and Gas Field, Xi’an 710018, China

Online published: 2012-12-20

摘要

针对常规压汞获得的孔喉数值偏低,影响对储层的正确认识及后期开发技术政策的制定等问题,应用消除毛管压力影响的恒速压汞数据对鄂尔多斯盆地延长组致密油储层微观孔喉特征进行了直观、定量的分析。结果表明:致密油储层平均孔隙半径为 153 μm,与渗透率无相关性;平均喉道半径为 0.34 μm,是影响渗透率的主要因素,与渗透率具有很强的正相关性;孔喉半径比大,平均为 556,与渗透率有较强的负相关性;汞进入阻力较小的大喉道所控制的孔隙时,总毛管压力曲线与孔隙毛管压力曲线几乎重合,喉道的影响不明显,随着进汞量的不断增加,毛管压力逐渐升高,喉道逐渐主导着进汞总量。 因此,致密油的规模开发需应用先进的储层改造工艺,充分扩大、增加喉道,降低孔喉半径比,提高储层渗流能力,才能取得更好的开发效果。

本文引用格式

陈可洋 . 应用恒速压汞技术研究致密油储层微观孔喉特征———以鄂尔多斯盆地上三叠统延长组为例[J]. 岩性油气藏, 2012 , 24(6) : 60 -65 . DOI: 10.3969/j.issn.1673-8926.2012.06.011

Abstract

The lower pore and throat radius parameters from conventional mercury penetration technique affect the reservoir evaluation and later development technique policy constituting. Based on constant-rate mercury penetration technique, the microcosmic pore throat characteristics of tight reservoir of Yanchang Formation of Ordos Basin were analyzed, and the alterations of pore throat characteristic parameters were also quantitatively and clearly characterized. The average pore radius of tight reservoir is about 153 μm and has no correlation with the permeability. The average throat radius is about 0.34 μm and there is a great positive correlation between the throat radius and permeability. The average ratio of pore and throat radius is 556, and there is a negative correlation between the ratio and permeability. While mercury enters into the bigger pores controlled by wide throats for little resistance, the influence of throats is unclear. With input mercury gradually increasing and capillary pressure rising, throats gradually control whole mercury saturation. Using advanced technique to change reservoir formation to increase or enlarge throat radius and decrease the ratioofpore and throat radius, in order to increase permeability, so the development of tight oil can have a good result.

参考文献

[1] 林森虎,邹才能,袁选俊,等.美国致密油开发现状及启示[J].岩性油气藏,2011,2(34):25-30.
[2] 贾承造,郑民,张永峰.中国非常规油气资源与勘探开发前景[J].石油勘探与开发,2012,39(2):129-135.
[3] 何顺利,焦春艳,王建国,等.恒速压汞与常规压汞的异同[J].断块油气田,2011,18(2):235-237.
[4] 付金华,郭正权,邓秀芹.鄂尔多斯盆地西南地区上三叠统延长组沉积相及石油地质意义[J].古地理学报,2005,7(1):35-42.
[5] 杨华,窦伟坦,刘显阳,等.鄂尔多斯盆地三叠系延长组长7 沉积相分析[J].沉积学报,2010,28(2):254-262.
[6] 傅强,李益.鄂尔多斯盆地晚三叠世延长组长6 期湖盆坡折带特征及其地质意义[J].沉积学报,2010,28(2):294-297.
[7] 于俊波,郭殿军,王新强.基于恒速压汞技术的低渗透储层物性特征[J].大庆石油学院学报,2006,30(2):22-25.
[8] 邹才能,杨智,陶士振,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):13-16.
[9] 何自新,贺静.鄂尔多斯盆地中生界图册[M].北京:石油工业出版社,2004:134-135.
[10] 伍小玉,罗明高,聂振荣,等.恒速压汞技术在储层孔隙结构特征研究中的应用———以克拉玛依油田七中区及七东区克下组油藏为例[J].天然气勘探与开发, 2012,35(3):28-30.
[11] 朱玉双,柳益群,赵继勇,等.不同流动单元微观渗流特征研究———以华池油田长 3 油藏华 152 块为例[J].石油实验地质,2008,30(1):103-108.
[12] 孙卫,曲志浩,李劲峰.安塞特低渗透油田见水后的水驱油机理及开发效果分析[J].石油实验地质,1999,21(3):256-259.
[13] 王瑞飞,沈平平,宋子齐,等.特低渗透砂岩油藏储层微观孔喉特征[J].石油学报,2009,30(4):560-563.
[14] 高辉,解伟,杨建鹏,等.基于恒速压汞技术的特低—超低渗砂岩储层微观孔喉特征[J].石油实验地质,2011,33(2):206-211.
文章导航

/