鄂尔多斯盆地什社地区延长组长3<sub>1</sub>储层特征及评价

喻雅敏; 文志刚

鄂尔多斯盆地什社地区延长组长3₁储层特征及评价

喻雅敏^{1, 2,},
文志刚^{1, 2, ,}

1.
长江大学油气资源与勘探技术教育部重点实验室, 湖北武汉 430100
2.
长江大学资源与环境学院, 湖北武汉 430100

基金项目:

"十二五"国家科技重大专项项目 2011ZX05033-004

中国地质调查局地质调查项目 1212011120965

中国地质调查局地质调查项目 1212011220762

详细信息

作者简介:
喻雅敏(1992-), 女, 硕士研究生, 主要从事油气地质综合研究.E-mail:542998916@qq.com

通讯作者:
文志刚(1965-), 男, 教授, 主要从事油气地球化学和石油地质综合研究.E-mail:wzg728@sina.com

中图分类号: TE122.2
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- 被引次数: 0
出版历程
- 收稿日期: 2017-05-26
- 刊出日期: 2017-08-01

CHARACTERISTICS AND COMPREHENSIVE EVALUATION OF CHANG 3₁ RESERVOIRS OF YANCHANG GROUP IN SHISHE AREA, ORDOS BASIN

YU Yamin^{1, 2
,},
WEN Zhigang^{1, 2
, ,}

1.
Key Laboratory of Oil and Gas Resources and Exploration Technology, Ministry of Education, Yangtze University, Wuhan 430100, Hubei, China
2.
College of Resources and Environment, Yangtze University, Wuhan 430100, Hubei, China

摘要

摘要: 本文依据岩石薄片、铸体薄片、物性分析、压汞曲线等资料，对鄂尔多斯盆地什社地区延长组长3₁储层特征进行了深入的研究。研究分析认为：什社地区长3₁储层主要为长石岩屑砂岩和岩屑长石砂岩，属于低孔—特低孔、特低渗—超低渗储层，储集空间主要为粒间孔和长石溶孔。储层的分布主要受沉积相带的控制，后期成岩作用对储层的储集性能也有一定的改造。综合储层分类评价标准，将研究区储层分为3类，什社地区长3₁油层组以Ⅰ类、Ⅱ类储层为主。
- 什社地区 /
- 长3₁储层 /
- 储层特征 /
- 分类评价
Abstract: Based on the data of rock thin sections, casting thin sections, physical property analysis and intrusive mercury curves, the characteristics of Chang 3₁ reservoirs of Yanchang group in Shishe area of Ordos Basin were studied. The results show that the reservoirs of Chang 3₁ in Shishe area are mainly composed of feldspar lithic sandstone and lithic feldspar sandstone, belonging to low-ultra low porosity and low-ultra low permeability reservoir. The main pore types are intergranular pore and feldspar dissolved pore. The distribution of reservoirs is mainly controlled by sedimentary facies and the diagenesis afterwards also affects the reservoir properties. According to the evaluation criterion, the reservoirs of the study area can be divided into three types. Chang 3₁ reservoir group in Shishe area mainly are type Ⅰ reservoir and type Ⅱ reservoir.
- Shishe area /
- Chang 3₁ reservoirs /
- reservoir characteristics /
- classification evaluation

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图 1 研究区与采样点位置图

Figure 1. Location map of the study area and sample collection sites

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图 2 什社地区长3₁砂岩分类三角图

Figure 2. The sandstone classification of Chang 3₁ in Shishe area

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图 3 什社地区长3₁储层孔隙类型

Figure 3. Pore types of Chang 3₁ reservoirs in Shishe area

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图 4 什社地区长3₁储层主要发育的喉道类型

Figure 4. Main throat types of Chang 3₁ reservoirs in Shishe area

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图 5 什社地区长3₁毛细管压力曲线

Figure 5. Capillary pressure curves of Chang3₁ in Shishe area

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图 6 什社地区长3₁储层孔隙度、渗透率与砂地比相关性

Figure 6. Correlation between porosity, permeability and sand-stratum ratio respectively of Chang 3₁ reservoirs in Shishe area

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图 7 什社地区长3₁储层铸体薄片和电镜扫描照片

a—西86井1531.43 m长3₁颗粒凹凸接触，压实作用强烈，致密结构特征；b—西63井1483.6 m长3₁塑性岩屑强烈变形，具压溶现象，少量高岭石充填孔隙，可见孔不发育; c—西78井1416.0 m长3₁少量自生高岭石及绿泥石充填孔隙；d—西281井1431.14 m长3₁自生高岭石粘土充填粒间孔喉生长；e—西78井1416.0 m长3₁部分孔隙中充填自生铁白云石；f—西63井1483.6 m长3₁云母及塑性岩屑变形，石英加大常见，铁白云石和高岭石充填孔隙，具粒间孔及长石溶孔；g—西78井1416.0 m长3₁加大状石英普遍胶结充填残余孔喉连通形态；h—西89井1455.14 m长3₁全貌，粒间残余孔较发育，石英次生加大普遍可见；i—板19井1602.6 m长3₁颗粒溶蚀孔；j—西90井1502.1 m长3₁粒间孔、溶孔

Figure 7. Casting thin section and SEM photographs of Chang 3₁ reservoirs in Shishe area

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图 8 什社地区长3₁成岩相平面图

Figure 8. Diagenetic facies of Chang 3₁ in Shishe area

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图 9 什社地区长3₁储层分类综合评价

Figure 9. Classitied and comprehensive evaluation of Chang 3₁ reservoirs in Shishe area

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表 1 什社地区长3₁砂岩储层孔隙类型

Table 1. Pore types of Chang 3₁ sandstone reservoirs in Shishe area

孔隙类型	面孔率/%			所占面孔率比例/%
孔隙类型	最大值	最小值	平均值	所占面孔率比例/%
粒间孔	10	0.3	5.4	63.29
长石溶孔	3.2	0.3	1.8	21.53
岩屑溶孔	1.9	0.2	0.6	6.94
其它	2.5	0.1	0.2	8.24

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表 2 什社地区长3₁储层分类评价表

Table 2. Classification evaluation of Chang 3₁ reservoir in Shishe area

分类标准	Ⅰ	Ⅱ	Ⅲ
沉积微相	水下分流河道	河道侧翼、河口坝	分流间湾
渗透率/mD	≥3.0	3.0~1.0	1.0~0.5
孔隙度/%	≥12.0	12.0~10.0	10.0~8.0
孔隙类型	粒间孔—溶孔	粒间孔—溶孔、微孔	微孔
储层评价	优质储层	相对优质储层	一般储层

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