| 

渝东南地区五峰组—龙马溪组页岩岩石相 及与页岩气富集关系

作    者:吴聿元, 张培先, 何希鹏, 高玉巧, 何贵松, 孙 斌, 万静雅, 高全芳, 周頔娜
单    位:中国石化华东油气分公司
基金项目:本文受国家科技重大专项课题“彭水地区常压页岩气勘探开发示范工程”等资助
摘    要:
渝东南地区五峰组—龙马溪组一段发育了一套滞留盆地半深水—深水陆棚相暗色细粒页岩。通过岩石相精细研究,五峰组—龙一段纵向上划分出9种岩石相:富碳富硅富笔石页岩相、高碳高硅富笔石页岩相、中碳高硅高含笔石页岩相、低碳中硅含笔石纹层状页岩相、中碳中硅中含笔石页岩相、低碳低硅含笔石页岩相为6种主要岩石相,低碳低硅介壳灰岩相、低碳低硅白云质页岩相、低碳含灰泥质粉砂岩相为3种次要岩石相。富碳富硅富笔石页岩相和高碳高硅富笔石页岩相具有高有机碳含量、高孔隙度、高脆性、高含气性、微裂缝发育的特点,为最优岩石相,页岩气水平井在最优岩石相穿行时单井试气产量高。明确了不同区带水平井穿行最优靶窗,从而为更好地指导水平井穿行轨迹奠定基础。
关键词:岩石相; 页岩气富集; 靶窗; 五峰组—龙马溪组; 渝东南地区

Lithofacies and shale gas enrichment of Wufeng Formation-Longmaxi Formation in Southeastern Chongqing

Author's Name: WU Yuyuan, ZHANG Peixian, HE Xipeng, GAO Yuqiao, HE Guisong, SUN Bin, WAN Jingya, GAO Quanfang, ZHOU Dina
Institution: 
Abstract:
A set of dark fine-grained shale of semi-deep water-deep water shelf developed in the Wufeng Formation-Longmaxi Formation in Southeastern Chongqing. Based on the fine study of lithofacies, nine types of lithofacies are divided from Wufeng Formation to Longmaxi Member 1: carbon-rich & silicon-rich & graptolite-rich shale facies, high-carbon & high-silicon & graptolite-rich shale facies, medium-carbon & high-silicon & high-graptolite shale facies, low-carbon & medium-silicon & graptolite-containing laminated shale facies, medium-carbon & medium-silicon & graptolite-containing shale facies, low-carbon & low-silicon & graptolite-containing shale facies are six major lithofacies; low-carbon & low-silicon shell limestone facies, low-carbon & low-silicon dolomitic shale facies, and low-carbon lime argillaceous siltstone facies are three secondary lithofacies. Carbon-rich & silicon-rich & graptolite-rich shale facies and high-carbon & high-silicon & graptolite-rich shale facies are the optimal lithofacies, which have the characteristics of high organic carbon content, high porosity, high brittleness, high gas content, and development of micro fractures. When horizontal well pass through the optimal lithofacies, the gas production of single well is high. The optimal target window for horizontal well in different zones is clarified, which lays a foundation for better guiding the trajectory of horizontal wells.
Keywords: lithofacies; shale gas enrichment; target window; Wufeng Formation-Longmaxi Formation; Southeastern Chongqing
投稿时间:2020-12-22  
查看pdf文件    


 
版权所有《海相油气地质》编辑部 苏ICP备09078051号-5
地址:浙江省杭州市西溪路920号 邮编:310023 电话:0571-85224922,85224923,85224960 传真:0571-85229509
本系统由南京杰诺瀚软件科技有限公司设计开发