分布式光纤井下监测水平井多级压裂方法  

Multistage Fracturing Method of Horizontal Wells Monitored by Downhole Distributed Optical Fiber

作　　者：尚琼 SHANG Qiong(Shale Gas Production Technique Service Company, Sinopec Oilfield Service Jianghan Corporation, Wuhan, Hubei, 430223, China)

机构地区：[1]中石化江汉石油工程有限公司页岩气开采技术服务公司,湖北武汉430223

出　　处：《江汉石油职工大学学报》2020年第2期53-56,共4页Journal of Jianghan Petroleum University of Staff and Workers

基　　金：国家科技重大专项大型油气田及煤层气开发(2016ZX05038-006)。

摘　　要：页岩气水平井目前多采用泵送桥塞和射孔联作工艺,该工艺能同时控制多条裂缝的起裂和延伸,但压裂成缝方位难以准确可靠地探测出。高分辨率分布式光纤声波感应(DAS)和温度感应(DTS)利用光纤中传输光的背向拉曼散射效应,可对光纤本身所处的声波场、温度场分布情况进行实时分布式的测量,利用光时域反射技术对测量点精确定位,可实现水平井多级多簇压裂施工期间裂缝起裂、扩展及延伸的实时监测。At present,pumping bridge plug+perforation technology is mostly used in horizontal shale gas wells,which can control the initiation and extension of multiple fractures at the same time,but has difficulties in detecting accurately and reliably the seam location by fracturing.High-resolution distributed optical fiber acoustic wave sensing(DAS)and temperature sensing(DTS)can measure the distribution of acoustic field and temperature field of the optical fiber in real time by taking advantage of the back direction Raman scattering effect of the transmitted light in the optical fiber.The optical time-domain reflection technique is used to accurately locate the measuring point,which can realize the real-time monitoring of the fracture initiation,propagation and extension during multistage and multi-cluster fracturing in horizontal wells.

关 键 词：分布式光纤 动态监测 多级压裂 压裂液 支撑剂 

分 类 号：TE358[石油与天然气工程—油气田开发工程] TN253[电子电信—物理电子学]