湘鄂西低勘探程度区构造解释及页岩气保存条件——以来凤咸丰区块为例

发布时间：2018-04-22 16:55

本文选题：页岩气 + 构造解释　；参考：《断块油气田》2017年06期

【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。
[Abstract]:Laifeng Xianfeng block is located in the eastern margin of Sichuan basin, adjacent to the high and steep fold belt of eastern Sichuan basin, and the mountainous geomorphology, surface and underground seismic geological conditions are complex. Based on the study of regional structural characteristics and related data of adjacent areas, 11 2D seismic profile data and 1 data well collected and processed in Laifeng Xianfeng block are taken as research objects and applied geology is used in this paper. In this paper, the seismic and well shock combined research methods are used to accurately calibrate the bottom interface of shale gas reservoir and to determine the seismic reflection characteristics of two important target layers. The results show that the reflection characteristic energy, frequency and continuity of the T 蔚 ~ (1 n) wave group in Niulitang formation of Lower Cambrian are strong, and there are generally 2 ~ 4 strong phases, which can explain the strong phase in tracking multi-phase, and the TS_1l frequency of Wufeng Longmaxi formation in Lower Silurian is low. Double strong phase, stable distribution, can be traced to the whole area. At the same time, the depth and thickness of the bottom boundary, the regional distribution and the structural characteristics of the two sets of target layers are determined. On this basis, the condition of shale gas preservation is evaluated synthetically, and the favorable structural location is selected, which lays the foundation for the next shale gas exploration and deployment.
【作者单位】：中国华电集团清洁能源有限公司勘探开发事业部;中国地质大学(北京)能源学院;
【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)
【分类号】：P618.13

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