渝东南地区常压页岩气勘探开发进展及下步攻关方向

云露; 高玉巧; 高全芳

doi:10.11781/sysydz2023061078

渝东南地区常压页岩气勘探开发进展及下步攻关方向

doi: 10.11781/sysydz2023061078

1.
中国石化华东油气分公司, 南京 210019
2.
中国石化华东油气分公司勘探开发研究院, 南京 210019

基金项目:

国家重大科技专项 2016ZX05061

中国石化科技部项目 P21087-6

详细信息

作者简介:
云露(1972—)，男，博士，正高级工程师，从事石油地质综合研究。E-mail: yunl.xbsj@sinopec.com

中图分类号: TE132.2
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出版历程
- 收稿日期: 2023-09-08
- 修回日期: 2023-10-19
- 刊出日期: 2023-11-28

Progress and research direction of normal-pressure shale gas exploration and development in southeastern Chongqing

1.
SINOPEC East China Oil & Gas Company, Nanjing, Jiangsu 210019, China
2.
Research Institute of Exploration and Development, SINOPEC East China Oil & Gas Company, Nanjing, Jiangsu 210019, China

摘要

摘要: 四川盆地及其周缘发育高压和常压2种页岩气藏类型。近年来，中国石化华东油气分公司立足于渝东南盆缘复杂构造区及盆外褶皱带开展常压页岩气技术攻关，经过十余年的探索攻关，常压页岩气勘探开发取得了重大进展，形成了相对完善的常压页岩气地质理论认识及工程工艺技术系列。与高压页岩气相比，常压页岩气具有构造复杂、保存条件差异大、地应力变化快等特点，为加快对该类页岩气的勘探开发，从地质特征、富集规律、勘探开发效果等方面，系统总结了渝东南地区常压页岩气勘探开发进展及认识：①深水陆棚相控制常压页岩气优质页岩展布，多期构造作用控制了构造样式、裂缝及地应力差异性分布，保存条件具有自东向西、由南往北逐渐变好的变化规律；②构建了4种常压页岩气聚散模式，有效指导了勘探部署，盆缘地区落实了平桥、东胜、阳春沟3个千亿立方米增储区带，发现了南川常压页岩气田，盆外地区明确了武隆、道真、老厂坪等一批有利目标；③制定了常压页岩气开发技术政策，明确产能主控因素，实现了效益开发。通过系统总结渝东南地区前期成果认识和勘探开发经验，分析面临的挑战，明确了下步攻关方向，可为中国南方同类地区常压页岩气效益开发提供借鉴。
- 勘探开发进展 /
- 油气富集规律 /
- 勘探攻关方向 /
- 常压页岩气 /
- 渝东南
Abstract: There are high-pressure shale gas reservoirs and normal-pressure shale gas reservoirs in the Sichuan Basin and its periphery. In recent years, SINOPEC East China Oil & Gas Company takes technical research for normal-pressure shale gas in the complex tectonic regions of basin margin and the fold belt outside Sichuan Basin in southeastern Chongqing, makes significant progress in exploration and development of normal-pressure shale gas, and forms relatively perfect geological theory and technology series of normal-pressure shale gas after more than ten years of research. The normal-pressure shale gas has the characteristics of complex structure, very different preservation condition, and complex in-situ stress compared with high-pressure shale gas. The exploration and development progress and cognition of normal-pressure shale gas in southeastern Chongqing are systematically summarized from geological characteristics, enrichment laws and exploration and development efficiency: (1)The continental shelf facies in deep-water shelf controls the high-quality shale distribution of normal-pressure shale gas, the multistage tectonism controls the differential distribution of tectonic types, fractures and in-situ stress, and the preservation condition becomes better from east to west and from south to north; (2)Four accumulation-dispersion modes of normal-pressure shale gas were established to guide exploration deployment. In the basin margin area, three 100 billion cubic meters increasing reserves zones of Pingqiao, Dongsheng and Yangchungou were completed in the basin margin, and Nanchuan normal-pressure shale gas field was found. In the basin outside area, some favorable exploration targets were confirmed, such as Wulong Syncline, Daozhen Syncline, and Laochangping Anticline; (3)The development technology policy of normal-pressure shale gas was formulated, controlling factors of productivity were defined, and benefit development was realized.Through systematic summary of previous achievement understanding, exploration and development experience, the challenge was analyzed, and the research direction was cleared, to provide reference for normal-pressure shale gas benefit development in similar areas of South China.
- exploration and development progress /
- oil and gas enrichment laws /
- research direction of exploration /
- normal-pressure shale gas /
- southeastern Chongqing
注释:

利益冲突声明/Conflict of Interests

所有作者声明不存在利益冲突。

All authors disclose no relevant conflict of interests.

作者贡献/Authors’Contributions

云露提出论文整体构思, 负责常压页岩气富集规律分析及论文的统稿；高玉巧负责常压页岩气地质特征研究；高全芳负责常压页岩气勘探开发进展调研；所有作者均参与论文的写作和修改；所有作者均阅读并同意最终稿件的提交。

YUN Lu proposed the overall concept of the paper and was responsible for analyzing the enrichment laws of normal-pressure shale gas and compiling the paper. GAO Yuqiao was responsible for the research on geological characteristics of normal-pressure shale gas. GAO Quanfang was responsible for the research on the progress of normal-pressure shale gas exploration and development. All the authors have participated in the writing and the revision of the paper. All the authors have read the last version of paper and consented for submission.

HTML全文

图 1 渝东南地区位置

Figure 1. Location of southeastern Chongqing

下载: 全尺寸图片幻灯片

图 2 渝东南地区常压页岩气勘探开发历程

Figure 2. Exploration and development history of normal-pressure shale gas in southeastern Chongqing

下载: 全尺寸图片幻灯片

图 3 渝东南地区及周边重点钻井五峰组—龙马溪组一段连井剖面

剖面位置见图 1。

Figure 3. Well connection profile of important wells in Wufeng Formation-Member 1 of Longmaxi Formation in southeastern Chongqing and surrounding area

下载: 全尺寸图片幻灯片

图 4 渝东南地区五峰组—龙马溪组一段沉积微相连井对比

Figure 4. Well connection contrasts of sedimentary microfacies in Wufeng Formation-Member 1 of Longmaxi Formation in southeastern Chongqing

下载: 全尺寸图片幻灯片

图 5 渝东南地区不同构造带岩性组合特征

Figure 5. Lithology combination characters in different tectonic zones of southeastern Chongqing

下载: 全尺寸图片幻灯片

图 6 渝东南南川地区五峰组底面构造及地应力平面图

Figure 6. Structural map and distribution of in-situ stress of the bottom of Wufeng Formation in Nanchuan area of southeastern Chongqing

下载: 全尺寸图片幻灯片

表 1 渝东南南川地区平桥开发分区特征

Table 1. Characteristics of Pingqiao development zonation in Nanchuan area of southeastern Chongqing

项目			背斜主体	背斜两翼	南斜坡
地质特征		埋深/m	2 500~3 700	3 700~4 200	2 500~3 700
		压力系数	1.2~1.32	1.3~1.32	1.1~1.2
		地应力/MPa	60~80	80~110	70~80
生产特征	初期	日产气/10⁴ m³	8.6	7.9	9.2
	初期	套压/MPa	27.5	15.3	16.2
	稳产期	日产气/10⁴ m³	6.8	5.3	4.6
		压降/(MPa/d)	0.15	0.18	0.22
		稳产期/年	3	1.4	1
		阶段累产/10⁴ m³	6 954	2 628	1 920
	递减期	初始递减率/%	34.8	46.8	59.3
		压降/(MPa/d)	0.009	0.007	0.005
		阶段累产/10⁴ m³	6 646	4 472	4 800
		递减期占比/%	48.5	62.9	73.8
	平均EUR/10⁸ m³		1.36	0.71	0.65

下载: 导出CSV

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