摘要
来凤咸丰区块地处四川盆地东缘,紧邻川东高陡褶皱带,山地地貌,地表和地下地震地质条件复杂。在研究了区域构造特征及邻区相关资料的基础上,文中主要以来凤咸丰区块采集和处理的11条二维地震剖面资料及1口资料井为研究对象,运用地质、地震及井震联合的研究手段,准确标定页岩气层底界面,确定2套重点目的层地震反射特征。研究结果表明:下寒武统牛蹄塘组Tε_(1n)波组反射特征能量强、频率低、连续性好,一般有2~4个强相位,可解释追踪多相位中较强的相位;下志留统五峰—龙马溪组TS_1l频率低,双强相位,分布稳定,可进行全区追踪。同时,确定了2套目的层的底界埋深与厚度、区域展布特征、构造特征。在此基础上,综合评价了页岩气保存条件,优选了有利构造位置,为下步页岩气勘探部署奠定了基础。
With mountainous topography and complicated seismic-geology conditions of the surface and underground, Laifeng- Xianfeng Block is located in the eastern edge of Sichuan Basin, adjacent to eastern Sichuan high and steep fold belt. Based on the regional tectonic characteristics and related data of adjacent areas, taking 11 sets of 2D seismic data and one information well as research object, using research means of geology, seismic and well-seismic combination, the reflection characteristics of the shale gas bottom interface were accurately calibrated and the seismic reflection characteristics of two key shale were determined. The result shows that the waves reflection of Niutitang Formation has the characteristics of strong energy, low frequency, good continuity, generally 2-4 phases and stronger phase are tracked in structural interpretation; the waves reflection of Wufeng-Longmaxi Formation has the characteristics of low frequency, double strong phase, stable distribution and can be regionally tracked. At the same time, the depth and thickness of shale, regional distribution characteristics and structure characteristics were determined. Finally the shale gas preservation conditions were comprehensively evaluated, and the favorable structural position was optimized, laying a solid foundation for next exploratory.
作者
洪克岩
李博
姜生玲
胡晓兰
朱亮亮
HONG Keyan;LJ Bo;JJANG Shengling;HU Xiaolan;ZHU Liangliang(Exploration and Development Division, China Huadian Green Energy Co. LTD., Beijing 100160, China;School of Energy Resources, China University of Geosciences, Beijing 100083, China)
出处
《断块油气田》
CAS
北大核心
2017年第6期779-782,804,共5页
Fault-Block Oil & Gas Field
基金
国家科技重大专项专题"来凤咸丰及鹤峰区块复杂构造区海相页岩气勘查评价应用试验"(2016ZX05034-004-004)
中国华电集团公司重点项目"华电页岩气区块产能建设目标优选及开发前期评价"(CHDKJ16-01-36)
关键词
页岩气
构造解释
保存条件
五峰-龙马溪组
来凤咸丰区块
shale gas
tectonic interpretation
preservation condition
Wufeng-Longmaxi Formation
Laifeng-Xianfeng Block
