西湖凹陷探井压裂实践与认识  

Practice and knowledge of exploration well fracturing in West Lake sag

作　　者：郭布民[1] 王杏尊[1] 鲍文辉[1] 黄杰[1] 李艳丽 

机构地区：[1]中海油田服务股份有限公司油田生产研究院,天津300450 [2]中海油采油技术服务公司钻采工程研究院地质油藏所,天津300457

出　　处：《石油钻采工艺》2012年第B09期70-72,共3页Oil Drilling & Production Technology

基　　金：中国海洋石油总公司"海上低渗透油气田钻完井技术研究"(编号:2010-YXZHKY-011)

摘　　要：A1井是一口位于东海盆地西湖凹陷A构造的低渗气田探井,该井地层埋藏深(3 970 m),地层温度高(150℃),必须通过压裂改造才能达到认识和评价储层的目的。针对储层特点和压裂改造难点,进行了压裂层位优选、高温压裂液体系优选、压裂测试一体化管柱设计、压裂工艺方案和施工参数优选、小型压裂等研究,以此为基础,进一步优化压裂施工方案、钻井平台压裂设备摆放方案和现场配液方案。主压裂施工排量3.5 m3/min,井口压力51～61 MPa,最高砂比40%,前置液比例39.6%,累计入井液量333m3,砂量35m3,是国内海上压裂施工加砂规模最大的一次。压后增产效果明显,为东海低渗油气田开发提供了强有力的技术支持。The A1 well is a low permeability gas well located in the West Lake sag A structure of the East China Sea Basin, the well deeply lies hidden in the earth （ 3 970 m ） , underground temperature is high （ 150℃） , in order to achieve the recognition and evalua- tion of reservoirs there is a must by fracture and reform. Aimed at the difficulty of the reservoir＇ s characteristics and fracture, transform, we took a prior research, such as fracturing layer selection, high temperature fracturing fluid system selection, fracturing test integrated with pipe string design, fracturing process scheme, construction parameter selection and small scale fracturing, etc.. On this basis, we furthermore optimize the fracturing construction concept, fracturing equipment display plan on the drilling platform and on-site mixing liquid plan. The out flowing rate of the main fracturing construction is 3.5 m3/min, wellhead pressure is 51-61 MPa, maximum sand ratio is 40%, pad fluid proportion is 39.6 %, accumulative total injected dose into well is 333 m3, sand volume 35 m3, is the largest time to add sand in scale by fracturing construction in domestic offshore. After fracturing the production increment effectiveness is obvious, it is confirmed the use of hydraulic fracturing technology can successfully emancipate the low permeability blocks in East China See, this provides the powerful technical support for the future low permeability gas well oilfield in East China Sea.

关 键 词：东海 低渗透 探井 压裂测试一体化 

分 类 号：TE357[石油与天然气工程—油气田开发工程]