南方海相深层页岩气储集空间差异化发育及保持机理探讨

杨振恒; 陶国亮; 鲍云杰; 卢龙飞; 孙永革; 刘伟新; 申宝剑; 聂海宽

doi:10.11781/sysydz202205845

南方海相深层页岩气储集空间差异化发育及保持机理探讨

doi: 10.11781/sysydz202205845

杨振恒^{1, 2, 3, 4,},
陶国亮^{1, 2, 3, 4},
鲍云杰^{1, 2, 3, 4},
卢龙飞^{1, 2, 3, 4},
孙永革⁵,
刘伟新^{1, 2, 3, 4},
申宝剑^{1, 2, 3, 4},
聂海宽⁶

1.
中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126
2.
中国石化油气成藏重点实验室, 江苏无锡 214126
3.
页岩油气富集机理与有效开发国家重点实验室, 江苏无锡 214126
4.
国家能源页岩油研发中心, 江苏无锡 214126
5.
浙江大学地球科学学院, 杭州 310014
6.
中国石化石油勘探开发研究院, 北京 102206

基金项目:

国家科技重大专项 2015ZX05061001

国家自然科学基金项目 41690133

详细信息

作者简介:
杨振恒(1979-), 男, 高级工程师, 从事非常规油气研究工作。E-mail: yangzh.syky@sinopec.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: 2022-02-13
- 修回日期: 2022-08-01
- 刊出日期: 2022-09-28

Differential development and maintenance mechanism of reservoir space for marine shale gas in South China's deep strata

YANG Zhenheng^{1, 2, 3, 4
,},
TAO Guoliang^{1, 2, 3, 4},
BAO Yunjie^{1, 2, 3, 4},
LU Longfei^{1, 2, 3, 4},
SUN Yongge⁵,
LIU Weixin^{1, 2, 3, 4},
SHEN Baojian^{1, 2, 3, 4},
NIE Haikuan⁶

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China
2.
SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China
3.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu 214126, China
4.
State Energy Center for Shale Oil Research and Development, Wuxi, Jiangsu 214126, China
5.
School of Earth Sciences, Zhejiang University, Hangzhou, Zhejiang 310014, China
6.
Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 102206, China

摘要

摘要: 我国南方海相深层(主体埋深大于3 500 m)页岩气具备良好的地质条件，资源潜力巨大，但由于埋深大，研究程度低，不同位置的水平井之间产能差异比较明显，勘探开发面临诸多挑战。在调研国内外深层页岩气现状及发展动态的基础上，重点梳理我国南方海相深层页岩气储集空间差异化发育、石英等刚性矿物抗压保孔和储层流体超压保孔等研究进展和存在问题。就川东南上奥陶统五峰组—下志留统龙马溪组深层页岩气而言，储集空间差异化发育及其是否有效保持是控制含气量、产能和单井EUR的主要原因之一，但差异化发育特征及保持机理并不明确，储层近深层原位条件下的差异化响应过程及机理仍需要深入研究；石英等刚性矿物在抗压保孔过程中具有重要的作用，但关于“石英抗压保孔”对不同储集空间类型的差异化作用仍不十分明确；“储层流体超压”作用对于深层页岩气储集空间保持具有重要的意义，但对“储层流体超压”究竟如何作用于深层页岩储集空间了解甚微。解决上述问题的关键在于研究典型富有机质页岩处于近深层原位状态下(多重应力加载和高温)不同类型储集空间类型差异化发育、响应及保持特征和作用机理。
- 深层页岩气 /
- 差异化发育 /
- 保持机理 /
- 五峰组—龙马溪组 /
- 南方海相
Abstract: The deep marine strata with burial depth greater than 3 500 m in South China have good geological conditions and huge potential for shale gas resource. However, due to the burial depth and relative poor understanding, the productive difference between horizontal wells in different positions is obvious, and exploration and development are still challenging. On the basis of investigating the current situation and development trends of global deep shale gas, this paper focuses on the differential development of reservoir of marine deep shale gas in South China, the pore preservation by pressure resistance of rigid minerals such as quartz, and the pore preservation of reservoir fluid overpressure. The differential development of reservoir space and effectiveness is one of the main factors for the controlling of gas content, productivity and EUR per well of deep shale gas of the Wufeng-Longmaxi formations in the southeastern part of Sichuan Basin, but the characteristics of differential development and maintenance mechanism is unclear, and the differentiated response process under in-situ conditions of near-deep reservoirs and the mechanism still need to be studied. Although it is recognized that rigid minerals such as quartz play an important role for the pressure resistance and pore preservation, its varied effect on different types of storage spaces is still unclear. It has been shown that the effect of reservoir fluid overpressure is of great significance to the preservation of deep shale gas storage space, it is still limited understanding of how reservoir fluid overpressure affects deep shale reservoir space. The key factor to answer the problems above is to study the characteristics and mechanism of differential development, response and maintenance of different types of reservoir space in a typical organic-rich shale in a near-deep in-situ state with multiple stress loading and high temperature.
- deep shale gas /
- differential development /
- maintenance mechanism /
- Wufeng-Longmaxi formations /
- marine strata in South China

HTML全文

图 1 川南地区深层X井岩心样品孔渗随压力变化曲线

Figure 1. Variation curves of porosity and permeability with pressure of core samples from deep strata, well X, southern Sichuan Basin

下载: 全尺寸图片幻灯片

图 2 四川盆地WY23-1井、DYS1井和YZ1井富有机质层储集空间发育特征镜下对比

Figure 2. Microscopic comparison of reservoir space development characteristics of organic-rich reservoirs of wells WY23-1, DYS1 and YZ1 in Sichuan Basin

下载: 全尺寸图片幻灯片

表 1 南方各地区上奥陶统五峰组—下志留统龙马溪组深层优质页岩段储集空间发育及含气性数据

Table 1. Reservoir space development and gas-bearing data of high-quality shale section in deep strata, Upper Ordovician Wufeng Formation to Lower Silurian Longmaxi Formation, South China

序号	井号	埋深/m	脆性矿物/%	孔隙度/%	比表面积/(m²·g^-1)	含气量/(m³·t^-1)	压力系数	初始产能/(10⁴ m³·d^-1)
1	DYS1井	4 278	50.4	6.34	25.50	5.06	1.58	31.00
2	WY23-1井	3 856	61.4	6.97	26.50	4.23	1.88	26.10
3	WY29-1井	3 715	67.4	6.96	32.00	3.83	1.91	23.82
4	JY1井	2 415	56.5	4.65	18.90	5.85	1.55	20.30

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