Characteristics of tight sandstone reservoir of Chang 4+5 oil reservoir setin Yan’an area, Ordos Basin

  • WANG Weili ,
  • GAO Hairen
Expand
  • Yongning Oil Production Plant, Yanchang Oilfield Corporation, Yan’an 716000, China

Online published: 2013-11-26

Abstract

According to the data of rock thin section, cast thin section, scanning electron microscope, X diffraction of clay minerals, high pressure mercury and properties analysis, this paper studied the characteristics of tight sandstone reservoir of Chang 4+5 oil reservoir set in Yan’an area. The results show that the rock type of Chang 4+5 sandstone reservoir is mainly fine-grained feldspar sandstone; porosity and permeability range from 6.0% to 10.0% and 0.2 mD to 2.0 mD respectively, and the reservoir belongs to typical tight sandstone reservoir; reservoir space is mainly residual intergranular pores, followed by dissolved pores in feldspar and laumontite; pore structure is dominated by small pore and fine throat type, followed by fine throat and pore tiny throat type; compaction and cementation in chlorite, calcite and laumontite are the main factor for causing poor reservoir properties, and dissolution improves reservoir properties. The results of this study provide a geological basis for rolling exploration and development for Chang 4+5 oil reservoir set in Yan’an area.

Cite this article

WANG Weili , GAO Hairen . Characteristics of tight sandstone reservoir of Chang 4+5 oil reservoir setin Yan’an area, Ordos Basin[J]. Lithologic Reservoirs, 2013 , 25(6) : 25 -29 . DOI: 10.3969/j.issn.1673-8926.2013.06.005

References

 [1] 刁帆,文志刚.鄂尔多斯盆地胡尖山油田延长组长4+52 储层特 征及综合评价[J].岩性油气藏,2011,23(2):53-58.
 [2] 白玉彬,赵靖舟,罗静兰,等.陕北斜坡东部蟠龙油田长6 油藏 形成条件及勘探方向[J].新疆石油地质,2011,32(6):594-596.
 [3] 赵靖舟.非常规油气有关概念、分类及资源潜力[J].天然气地球 科学,2012,23(3):393-406.
 [4] 国家能源局.SY/T 6832—2011 致密砂岩气地质评价方法[S]. 北京:石油工业出版社,2011. 
 [5] 赵靖舟,吴少波,武富礼.论低渗透储层的分类与评价标准—— — 以鄂尔多斯盆地为例[J].岩性油气藏,2007,19(3):28-31. 
 [6] 谢庆邦,贺静.陕甘宁盆地南部延长组低渗砂岩储层评价[J].天 然气工业,1994,14(3):16-19.
 [7] 朱国华.陕甘宁盆地西南部上三叠系延长统低渗透砂体和次生孔隙砂体的形成[J].沉积学报,1985,3(2):1-20.
 [8] 柳益群,李文厚.陕甘宁盆地东部上三叠统含油长石砂岩的成 岩特点及孔隙演化[J].沉积学报,1996,14(3):87-96. 
 [9] 罗静兰,张晓莉,张云翔,等.成岩作用对河流—三角洲相砂岩 储层物性演化的影响[J].沉积学报,2001,19(4):541-547.
 [10] 田建锋,陈振林,杨友运.自生绿泥石对砂岩储层孔隙的保护 机理[J].地质科技情报,2008,27(4):49-54. 
 [11] 杨晓萍,裘怿楠.鄂尔多斯盆地上三叠统延长组浊沸石的形成 机理、分布规律与油气关系[J].沉积学报,2002,20(4):628-632. 
 [12] 于雷,陈建文,金绍臣,等.鄂尔多斯盆地彭阳地区延安组、长 3 油层组储层特征及评价[J].岩性油气藏,2012,24(6):49-53.
 [13] 严云奎,于波,崔智林,等.鄂尔多斯盆地甘谷驿油田长4+5 储 层砂岩成岩作用[J].兰州大学学报:自然科学版,2009,45(3):8-12. 
 [14] 李克永,李文厚,陈全红,等.鄂尔多斯盆地镰刀湾地区延长组 浊沸石分布与油藏关系[J].兰州大学学报:自然科学版,2010,46(6):23-28.
 [15] 杨晓萍,赵文智,邹才能,等.低渗透储层成因机理及优质储层 形成与分布[J].石油学报,2007,28(4):57-61. 
[16] 朱如凯,邹才能,张鼐,等.致密砂岩气藏储层成岩流体演化与 致密成因机理—— —以四川盆地上三叠统须家河组为例[J].中 国科学 D 辑:地球科学,2009,39(3):327-339.
Outlines

/