临兴区块致密砂岩气3D井设计与施工  

Design and Drilling Operation of 3D Well of Tight Sand Gas in Block Linxing

作　　者：吴占民[1] 冯雷[1] 夏忠跃[1] 贾佳[1] 赵学田[1] 龚明[1] 

机构地区：[1]中海油能源发展股份有限公司工程技术分公司

出　　处：《石油机械》2016年第7期42-45,共4页China Petroleum Machinery

基　　金：中海油能源发展股份有限公司工程技术分公司科技项目"复杂钻井技术调研(第一期)"(GCJSLZBG-E1519)

摘　　要：临兴区块位于鄂尔多斯盆地东北部伊陕斜坡东段、晋西挠褶带西缘,致密砂岩气埋藏较深,地层岩性复杂是制约该区块开发的主要因素。为此,在分析该区块作业难点的基础上,以一口开双靶点定向井(3D井)为例,对井眼轨迹、井身结构和固井方法进行了设计,同时依据一开和二开所钻遇的地层特性对钻井液体系进行了优选。现场施工结果表明,3D井全井钻井周期21.07 d,作业时效96%,最大井斜角、裸眼段长度、井底水平位移及完钻井深均为临兴光导试验区记录,二开井段平均机械钻速相比邻井提高31%。所得结果可为区块的后续钻井作业提供参考。Linxing block is located at western edge of Jinxi flexible fold belt, eastern Yishan slopes of north-eastern Ordos basin. The deep buried tight sandstone gas and the complex lithology is the main factors constraining the block exploration and development. To address the issue, based on the operation difficulties analysis of the block, taking a double-target directional well （3D well） as a case, the well trajectory, wellbore configuration and cemen-ting method have been designed. The drilling fluid system has been optimized based on the formation properties of the first and the second spud. The field operation results show that the 3D well has a drilling cycle of 21. 07 d with the job time efficiency of 96%. The maximum inclination angle, the borehole length, the horizontal displacement and drilling depth have broken the records in Block Linxing. The average ROP of the second spud has increased 31%compared to the offset wells. The study could provide reference for subsequent drilling campaign in Block Linxing.

关 键 词：临兴区块 致密砂岩气 地层岩性 井身结构 钻井液体系 

分 类 号：TE242[石油与天然气工程—油气井工程]