渝东南构造复杂区常压页岩气富集高产主控因素再认识

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,高玉巧,刘明,张培先,汪凯明. 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.

HE Xipeng,QI Yanping,HE Guisong,GAO Yuqiao,LIU Ming,ZHANG Peixian,WANG Kaiming. 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.

图/表 9

图1

表1

图2

图3

图4

图5

图6

图7

图8

参考文献 21

[1]	马永生, 蔡勋育, 赵培荣 . 中国页岩气勘探开发理论认识与实践[J]. 石油勘探与开发, 2018,45(4):561-574.
[2]	马新华, 谢军 . 川南地区页岩气勘探开发进展及发展前景[J]. 石油勘探与开发, 2018,45(1):161-169.
[3]	何治亮, 聂海宽, 张钰莹 . 四川盆地及其周缘奥陶系五峰组—志留系龙马溪组页岩气富集主控因素分析[J]. 地学前缘, 2016,23(2):8-17.
[4]	方志雄, 何希鹏 . 渝东南武隆向斜常压页岩气形成与演化[J]. 石油与天然气地质, 2016,37(6):819-827.
[5]	翟刚毅, 王玉芳, 包书景 , 等. 我国南方海相页岩气富集高产主控因素及前景预测[J]. 地球科学, 2017,42(4):1057-1068.
[6]	腾格尔, 申宝剑, 俞凌杰 , 等. 四川盆地五峰组—龙马溪组页岩气形成与聚集机理[J]. 石油勘探与开发, 2017,44(1):69-78.
[7]	郭彤楼, 张汉荣 . 四川盆地焦石坝页岩气田形成与富集高产模式[J]. 石油勘探与开发, 2014,41(1):28-36.
[8]	郭旭升 . 南方海相页岩气“二元富集” 规律——四川盆地及周缘龙马溪组页岩气勘探实践认识[J]. 地质学报, 2014,88(7):1209-1218.
[9]	王志刚 . 涪陵页岩气勘探开发重大突破与启示[J]. 石油与天然气地质, 2015,36(1):1-6. doi: 10.11743/ogg20150101
[10]	何希鹏, 高玉巧, 唐显春 , 等. 渝东南地区常压页岩气富集主控因素分析[J]. 天然气地球科学, 2017,28(4):654-664.
[11]	何希鹏, 何贵松, 高玉巧 , 等. 渝东南盆缘构造复杂区常压页岩气地质特征及富集高产规律[J]. 天然气工业, 2018,38(12):1-14.
[12]	徐政语, 梁兴, 王希友 , 等. 四川盆地罗场向斜黄金坝建产区五峰组—龙马溪组页岩气藏特征[J]. 石油与天然气地质, 2017,38(1):132-143.
[13]	吴蓝宇, 陆永潮, 蒋恕 , 等. 上扬子区奥陶系五峰组—志留系龙马溪组沉积期火山活动对页岩有机质富集程度的影响[J]. 石油勘探与开发, 2018,45(5):806-816.
[14]	何希鹏, 张培先, 房大志 , 等. 渝东南彭水—武隆地区常压页岩气生产特征[J]. 油气地质与采收率, 2018,25(5):72-79.
[15]	何贵松, 何希鹏, 高玉巧 , 等. 中国南方3套海相页岩气成藏条件分析[J]. 岩性油气藏, 2019,39(1):1-12.
[16]	魏祥峰 . 四川盆地及周缘龙马溪组热页岩特征及高U值成因[J]. 油气藏评价与开发, 2017,7(3):59-66.
[17]	王思航, 田小林, 王楚柯 , 等. 模糊相似法对页岩气选区评价的应用——以四川盆地海相页岩气为例[J]. 油气藏评价与开发, 2018,8(1):71-75.
[18]	高玉巧, 蔡潇, 张培先 , 等. 渝东南盆缘构造复杂区五峰组—龙马溪组页岩气储层孔隙特征与演化[J]. 天然气工业, 2018,38(12):15-25.
[19]	刘玉霞, 王亮, 程秀梅 , 等. 高成熟度页岩有机孔隙结构与压力系数关系初探——以川东南志留统龙马溪组为例[J]. 油气藏评价与开发, 2017,7(4):77-82.
[20]	张勇 . 彭水区块页岩脆性与含气性定性预测[J]. 油气藏评价与开发, 2017,7(1):78-82.
[21]	梅廉夫, 刘昭茜, 汤济广 , 等. 湘鄂西—川东中生代陆内递进扩展变形:来自裂变径迹和平衡剖面的证据[J]. 地球科学—中国地质大学学报, 2010,35(2):161-174.

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