川东南丁山地区五峰—龙马溪组页岩储层特征及影响因素

油气藏评价与开发 ›› 2019, Vol. 9 ›› Issue (4): 61-67.

川东南丁山地区五峰—龙马溪组页岩储层特征及影响因素

何顺¹,秦启荣^1,³,范存辉^1,³,周吉羚²,钟城¹,黄为¹

^1. 西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500
^2. 中国石油西南油气田分公司,四川成都 629000
^3. 四川省页岩气资源与环境协同创新中心,四川成都 610500

收稿日期:2018-07-05 出版日期:2019-08-26 发布日期:2019-08-28
作者简介:何顺（1993 —）,男,在读硕士研究生,从事非常规油气地质研究工作。通讯地址：四川省成都市新都区新都大道8号西南石油大学,邮政编码：610500。E-mail： 2535081975@qq.com
基金资助:
国家科技部重大专项“四川盆地重点地区应力与裂缝发育规律及评价方法研究”(2017ZX05036-003-003);西南石油大学油气藏地质及开发工程国家重点实验室开放基金“川东南地区龙马溪组富有机质页岩裂缝表征及地质意义”(PLN201718)

Shale Reservoir characteristics and influencing factors of Wufeng-Longmaxi formation in Dingshan area, Southeast Sichuan

HE Shun¹,QIN Qirong^1,³,FAN Cunhui^1,³,ZHOU Jiling²,ZHONG Cheng¹,HUANG Wei¹

1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
^2. Southwest Oil and Gas Field Company, CNPC, Chengdu, Sichuan 629000, China
^3. Collaborative Innovation Center of Shale Gas Resources and Envieonment of Sichuan Province, Chengdu, Sichuan 610500, China

Received:2018-07-05 Online:2019-08-26 Published:2019-08-28

摘要/Abstract

摘要：

川东南丁山地区五峰—龙马溪组页岩勘探潜力巨大,明确页岩储层特征及其控制因素具有重要意义。通过全岩“X”衍射和Maps显微扫描对页岩矿物组分及微观孔隙结构进行分析,对页岩矿物组成、储集空间类型、孔隙度、渗透率及其控制因素进行研究,从沉积环境和构造运动两方面剖析储层发育控制因素。结果表明,丁山地区页岩储层具备有机质高、脆性矿物含量高的特点,孔隙直径发育范围在10~100 nm,不同层段孔隙度、渗透率等物性参数不一,下部6~9小层孔隙度和渗透率高,裂缝和页理发育处渗透率出现陡增现象。储层发育受沉积和构造运动的双重影响,沉积环境是页岩储层形成的基础,与埋藏演化共同决定原生储集空间的发育,后期构造运动对储集空间组成和结构进行改造,一方面微裂缝增加储集空间和渗流能力,另一方面,过于发育的裂缝破坏储层的有效性。

关键词: 丁山地区, 沉积环境, 构造运动, 五峰—龙马溪组;, 页岩储层特征

Abstract:

The shale exploration potential of Wufeng-Longmaxi formation in Dingshan area of southeastern Sichuan is huge, and it is important to clarify the characteristics of shale reservoirs and their controlling factors. Through the “X” diffraction and Maps microscopic scanning of the whole rock, the shale mineral composition and microscopic pore structure were analyzed, and the shale mineral composition, reservoir space type, porosity, permeability and its controlling factors were studied. Then the sedimentary environment and tectonic movements was used to analyze reservoir development control factors. The results showed that the shale reservoirs in the Dingshan area were characterized by high organic matter and high brittle mineral content. The pore diameter development range was between 10 nm and 100 nm. The physical parameters such as porosity and permeability of different intervals were different. The porosity and permeability of the small layer 6~9 in lower part were high, and the permeability of cracks and phylogenetic development steeply increased. Reservoir development was affected by both sedimentary and tectonic movements. The sedimentary environment was the basis for the formation of shale reservoirs. Together with the burial evolution, the development of the primary reservoir space was determined. The later tectonic movements transformed the composition and structure of the reservoir space. On one hand, the micro fractures increased the reservoir space and seepage capacity, and on the other hand, the overdeveloped cracks destroyed the effectiveness of the reservoir.

Key words: Dingshan area, sedimentary environment, tectonic movement, Wufeng-Longmaxi formation, shale reservoir characteristics

中图分类号:

TE132

何顺,秦启荣,范存辉,周吉羚,钟城,黄为. 川东南丁山地区五峰—龙马溪组页岩储层特征及影响因素[J]. 油气藏评价与开发, 2019, 9(4): 61-67.

HE Shun,QIN Qirong,FAN Cunhui,ZHOU Jiling,ZHONG Cheng,HUANG Wei. Shale Reservoir characteristics and influencing factors of Wufeng-Longmaxi formation in Dingshan area, Southeast Sichuan[J]. Reservoir Evaluation and Development, 2019, 9(4): 61-67.

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井号	石英+长石		碳酸盐岩		黏土矿物		黄铁矿,%
井号	含量范围,%	平均含量,%	含量范围,%	平均含量,%	含量范围,%	平均含量,%	黄铁矿,%
DY1	18.03~83.99	58.56	4.24~26.73	9.2	7.69~46.75	27.6	1.1
DY2	31.4~56.5	43.8	8.8~26.0	16.0	22.9~48.4	39.7	1.2
DY3	39.3~62.6	50	15.1~21.8	17.5	20.4~40.9	32.4	2
DY4	40.8~66.1	51.6	13.7~19.7	16.0	18.2~42.3	32 .3	2.4

井号	小层号	有机质含量, %	孔隙度分布范围,%	平均孔隙度, %
丁页 1井	1号层	1.5~5.6	1.8~4.89	3.4
	2号层	1.5~2.3	1.5~3.0	2.3
	3号层	0.1~1.9	0.1~2.5	1.5
	4号层	0.1~1.7	0.1~2.0	1.2
丁页 3井	1号层	3.1~5.5	1.8~6.2	5.3
	2号层	4.9	2.3~5.2	5.2
	3号层	2.4~5.2	2.7~5.1	4.8
	4号层	1.3~4.2	3.0~5.0	4.3
	5号层	1.7~3.1	0.5~4.0	3.3
	6号层	0.1~1.9	0.5~3.4	2.4
	7号层	0.1~1.5	0.5~3.5	2.8
	8号层	0.2~1.9	0.5~2.6	2.5
	9号层	0.1~1.6	0.5~2.6	1.9

孔隙类别	直径
宏观大孔	>1cm
宏观中孔	1mm~1cm
微米级微观孔隙	1μm~1mm
纳米级微观孔隙	1nm~1μm
?级孔隙	<1nm