致密砂岩多因子储层精细分级评价方法——以东海盆地西湖凹陷渐新统花港组上段H3砂组为例

高梦天; 陆永潮; 杜学斌; 马义权; 张靖宇; 邓空

doi:10.11781/sysydz2021061097

致密砂岩多因子储层精细分级评价方法——以东海盆地西湖凹陷渐新统花港组上段H3砂组为例

doi: 10.11781/sysydz2021061097

高梦天^{1, 2,},
陆永潮²,
杜学斌³,
马义权⁴,
张靖宇^{2, 3},
邓空^{2, 3}

1.
中海石油(中国)有限公司海南分公司, 海口 570312
2.
中国地质大学(武汉) 构造与油气资源教育部重点实验室, 武汉 430074
3.
中国地质大学(武汉) 海洋学院, 武汉 430074
4.
成都理工大学沉积地质研究院, 成都 610059

基金项目:

国家重大科技专项 201605027001

国家自然科学基金 41802175

详细信息

作者简介:
高梦天(1995-), 男, 硕士, 从事沉积学、层序地层学与油气成藏研究。E-mail: gmt0520@163.com

中图分类号: TE122.2
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- 文章访问数: 432
- HTML全文浏览量: 122
- PDF下载量: 78
- 被引次数: 0
出版历程
- 收稿日期: 2021-04-08
- 修回日期: 2021-08-20
- 刊出日期: 2021-11-28

Multi-factor evaluation for fine grading of tight sandstone reservoirs: a case study from H3 sand group in the upper section of Oligocene Huagang Formation, Xihu Sag, East China Sea Basin

GAO Mengtian^{1, 2
,},
LU Yongchao²,
DU Xuebin³,
MA Yiquan⁴,
ZHANG Jingyu^{2, 3},
DENG Kong^{2, 3}

1.
Hainan Branch, CNOOC, Haikou, Hainan 570312, China
2.
Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences (Wuhan), Wuhan, Hubei 430074, China
3.
College of Marine Science and Technology, China University of Geosciences (Wuhan), Wuhan, Hubei 430074, China
4.
Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China

摘要

摘要: 东海盆地西湖凹陷西次凹渐新统花港组上段H3砂组为低孔低渗—低孔特低渗致密砂岩储层，优质储层分布成为制约开发产能的关键问题。基于岩心、测井及物性测试等资料，对该区进行了沉积微相刻画和储层物性分析，结合构造、沉积微相发育特征，对储层展开精细分级评价和优质储层预测。研究表明，H3砂组储层分布主要受构造特征、沉积微相、砂体厚度和孔渗条件四个因素影响。在综合分析各因素与含气饱和度关系的基础上，建立了受产能约束的四因子储层精细分级评价标准，把H3砂组储层划分为“甜点”储层（Ⅰ类）、中等储层（Ⅱ类）和无效储层（Ⅲ类）三种类型。优质储层预测研究区H3-3小层为可能的高产能潜力带，H3-1、H3-2和H3-4小层次之。
- 储层评价 /
- 储层分级 /
- H3砂组 /
- 花港组上段 /
- 渐新统 /
- 西湖凹陷 /
- 东海盆地
Abstract: The H3 sand group of the upper section of the Oligocene Huagang Formation in the western sub-sag of the Xihu Sag of the East China Sea Continental Shelf Basin is a tight sandstone reservoir with low porosity and low or ultra-low permeability. The distribution of high-quality reservoirs has become a key factor restricting productivity. Based on coring, well logging and physical property test data, the sedimentary microfacies and physical properties of the H3 sand group were studied, and a fine grading evaluation and "sweet spot" prediction were carried out. The reservoir distribution in the H3 sand group was mainly affected by four factors: structural characteristics, sedimentary microfacies, sand thickness and conditions of porosity and permeability. Moreover, on the basis of comprehensive analysis of the relationship among these factors and gas saturation, a four-factor reservoir fine grading evaluation method was proposed. The H3 sand group reservoirs were divided into three types: "sweet spot" reservoirs (type Ⅰ), medium reservoirs (type Ⅱ) and ineffective reservoirs (type Ⅲ).The H3-3 single sand layer has a great exploration potential, followed by the H3-1, H3-2 and H3-4 single sand layers.
- reservoir evaluation /
- reservoir grading /
- H3 sand group /
- upper section of Huagang Formation /
- Oligocene /
- Xihu Sag /
- East China Sea Basin

HTML全文

图 1 东海盆地西湖凹陷花港组构造区划(a)、古地理图(a，b)与地层柱状图(c)^[32]

Figure 1. Tectonic division (a), paleogeographic map (a, b) and stratigraphic column (c) of Huagang Formation in Xihu Sag, East China Sea Basin

下载: 全尺寸图片幻灯片

图 2 东海盆地西湖凹陷西次凹NB-1构造花港组上段H3砂组典型沉积特征

Figure 2. Typical sedimentary characteristics of H3 sand group of Upper Huagang Formation in NB-1 structure of Xihu Sag, East China Sea Basin

下载: 全尺寸图片幻灯片

图 3 东海盆地西湖凹陷NB-1构造花港组上段H3砂组储层物性特征

Figure 3. Physical properties of H3 sand group of Upper Huagang Formation in NB-1 structure of Xihu Sag, East China Sea Basin

下载: 全尺寸图片幻灯片

图 4 东海盆地西湖凹陷NB-1构造花港组上段H3砂组断层发育情况与产能关系连井对比

剖面位置见图 1。

Figure 4. Well connection contrasts of the correlation of fault development and productivity in H3 sand group of Upper Huagang Formation in NB-1 structure of Xihu Sag, East China Sea Basin

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图 5 东海盆地西湖凹陷NB-1构造花港组上段H3砂组沉积微相展布特征与产能关系连井对比

剖面位置见图 1。

Figure 5. Well connection contrasts of the correlation of sedimentary microfacies distribution characteristics and productivity in H3 sand group of Upper Huagang Formation in NB-1 structure of Xihu Sag, East China Sea Basin

下载: 全尺寸图片幻灯片

图 6 东海盆地西湖凹陷NB-1构造花港组上段H3砂组砂体厚度与油气产能关系

Figure 6. Relationship between sand body thickness and productivity in H3 sand group of Upper Huagang Formation in NB-1 structure of Xihu Sag, East China Sea Basin

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图 7 东海盆地西湖凹陷NB-1构造花港组上段H3砂组“甜点”储层预测

Figure 7. Prediction of "dessert" reservoir in H3 sand group of Upper Huagang Formation in NB-1 structure of Xihu Sag, East China Sea Basin

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表 1 东海盆地西湖凹陷NB-1构造花港组上段H3砂组储层孔渗条件与产能关系分类

Table 1. Grading table of relationship between porosity and permeability factors and productivity of H3 sand group of Upper Huagang Formation in NB-1 structure of Xihu Sag, East China Sea Basin

沉积微相	平均孔隙度/%	平均渗透率/10^-3 μm²	含气饱和度/%	储层物性分类
河道滞留沉积	7.59	1.66	46，54，56	低孔低渗
心滩	7.52	1.07	64，68	低孔低渗
湖泛改造的心滩	7.08	0.53	48	低孔特低渗
滨浅湖砂质滩坝	6.52	0.13	0	非储层

下载: 导出CSV

表 2 储层精细分级评价标准

Table 2. Evaluation criteria for fine classification of reservoirs

储层分级	构造因子	沉积微相因子	砂厚因子	孔渗因子
Ⅰ级(甜点储层)	A区	河道滞留沉积、心滩	累厚15~20 m，单层大于2 m，少夹层	低孔低渗
Ⅱ级(中等储层)	B区	湖泛改造的心滩	累厚大于20 m，单层大于1 m，多夹层(洪泛层)	低孔特低渗
Ⅲ级(无效储层)	C区	滨浅湖砂质滩坝	累厚小于15 m，单层小于1 m，多夹层(洪泛层)	非储层

下载: 导出CSV

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