渝东南构造复杂区常压页岩气富集高产主控因素再认识

油气藏评价与开发 ›› 2019, Vol. 9 ›› Issue (5): 32-39.

渝东南构造复杂区常压页岩气富集高产主控因素再认识

何希鹏¹,齐艳平²,何贵松¹,高玉巧¹,刘明¹,张培先¹,汪凯明¹

^1. 中国石化华东油气分公司勘探开发研究院,江苏南京 210011
^2. 中国石化石油勘探开发研究院,北京 100083

收稿日期:2019-08-09 发布日期:2019-10-26 出版日期:2019-10-26
作者简介:何希鹏（1970 —）,男,硕士,高级工程师,本刊第二届编委会委员,从事油气地质综合研究及勘探评价。通讯地址：江苏省南京市鼓楼区热河南路37号,邮政编码：210011。E-mail：hexp. hdsj@sinopec.com
基金资助:
“十三五”国家科技重大专项“彭水地区常压页岩气勘探开发示范工程”(2016ZX05061);中国石化科技开发部项目“渝东南盆缘转换带页岩气富集主控因素研究”(P18057-2、“南川复杂构造带页岩气勘探开发关键技术”P19017-3)

Further understanding of main controlling factors of normal pressure shale gas enrichment and high yield in the area with complex structure of the southeast area of Chongqing

HE Xipeng¹,QI Yanping²,HE Guisong¹,GAO Yuqiao¹,LIU Ming¹,ZHANG Peixian¹,WANG Kaiming¹

^1. Research Institute of Exploration and Development, Sinopec East China Oil and Gas Company, Nanjing, Jiangsu 210011, China
^2. Sinopec Petroleum Exploration and Production Research Institute, Beijing 100083, China

Received:2019-08-09 Online:2019-10-26 Published:2019-10-26

摘要/Abstract

摘要：

渝东南构造复杂区五峰组—龙马溪组页岩气勘探开发取得了积极进展。为了进一步深化该区页岩气成藏认识,在前期研究成果基础上,利用实验分析、物探、钻井、压裂、试气等资料,从控制页岩气富集和高产的关键因素方面入手,通过典型目标解剖和机理分析,总结了页岩气富集高产规律,提出了页岩气富集高产受沉积相带、保存条件、地应力场三因素控制,即深水陆棚相控制资源规模,保存条件控制页岩气富集程度,地应力场影响压裂改造效果、控制单井产量。复杂构造区开展页岩气甜点目标优选和井位部署,首先,评价控制页岩气富集的资源基础,即深水陆棚相优质页岩发育程度及指标;其次,评价构造作用强度,以明确页岩气保存条件及富集程度;最后,优选地应力适中的中等曲率带部署实施页岩气井,利于获得高产稳产。研究结果对复杂构造区页岩气勘探开发具有重要的指导和借鉴意义。

关键词: 渝东南构造复杂区, 五峰组—龙马溪组;, 常压页岩气, 地应力, 保存条件, 深水陆棚

Abstract:

Recently, positive progress has been made in the exploration and development for shale gas of the Wufeng-Longmaxi formation in the area with complex structure of the southeast area of Chongqing. In order to further deepen the understanding of shale gas accumulation in this area, based on the previous research results, by using the data such as experimental analysis, geophysical exploration, drilling, fracturing and gas testing, and starting from the key factors of controlling shale gas enrichment and high yield, typical target anatomy and mechanism analyses are carried out to summarize the rules of shale gas enrichment and high yield. Meanwhile, it is found that the enrichment and high yield of shale gas are controlled by three factors: sedimentary facies, preservation conditions and in-situ stress field, concretely speaking, deep-water shelf facies controls the scale of resources; preservation conditions control the degree of shale gas enrichment; in-situ stress field influences the effect of fracturing transformation and controls the yield of single well. To optimize shale gas sweet spot targets and well location deployment in complex structural areas, firstly, the resource basis for controlling shale gas enrichment should be evaluated, that is, the development degree and indicators of high-quality shale in deep-water shelf facies. Secondly, the intensity of tectonic movements is evaluated to determine the preservation conditions and enrichment degree of shale gas. Finally, it is preferred to deploy a shale gas well with a medium-curvature zone of moderate in-situ stress to facilitate high and stable yield. The research results have important guidance and reference significance for the exploration and development of shale gas in complex structural areas.

Key words: area with complex structure of the southeast area of Chongqing, Wufeng-Longmaxi formation, normal pressure shale gas, in-situ stress, preservation condition, deep-water shelf

中图分类号:

TE122

何希鹏,齐艳平,何贵松等. 渝东南构造复杂区常压页岩气富集高产主控因素再认识[J]. 油气藏评价与开发, 2019, 9(5): 32-39.

Xipeng HE,Yanping QI,Guisong HE, et al. Further understanding of main controlling factors of normal pressure shale gas enrichment and high yield in the area with complex structure of the southeast area of Chongqing[J]. Reservoir Evaluation and Development, 2019, 9(5): 32-39.

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沉积亚相	沉积微相	厚度/ m	铀/钍含量	TOC/ %	硅质含量/ %	黏土矿物含量/%	孔隙度/ %	含气量/ （m³·t^-1）
浅水陆棚		269~272	0.23~0.48	0.6~1.0	28.5~36.5	50.2~62.5	1.8~2.0	1.0~1.3
半深水陆棚		81~85	0.37~0.56	1.1~1.8	33.4~39.2	43.4~52.3	2.5~2.9	1.9~2.3
深水陆棚	中碳高硅高含笔石硅质页岩相	13~14	0.58~0.76	2.3~2.8	40.5~49.8	32.6~39.4	3.0~3.4	3.6~4.4
	高碳高硅富笔石硅质页岩相	8~9	0.65~0.92	3.0~3.6	42.4~52.3	31.5~37.2	3.1~3.5	4.8~5.4
	高碳富硅富笔石硅质页岩相	5~6	1.10~1.31	3.1~3.5	51.2~57.2	28.9~34.5	3.2~3.8	4.3~5.2
	富碳富硅富笔石硅质页岩相	1~1.5	1.28~1.52	4.0~5.5	55.5~68.5	22.7~30.5	3.1~4.7	5.8~7.8
	富碳富硅富笔石放射虫硅质页岩相	3~5	0.75~0.92	4.0~5.2	45.5~56.5	29.8~40.7	3.5~4.5	5.5~7.2