长庆油田井下作业关键环保技术及应用  

Key Environmental Protection Technologies and Applications for Downhole Operations in Changqing Oilfield

作　　者：江智强[1,2] 王尚卫[1,2] 罗有刚[1,2] 赵鹏玉 陈晓丽[1,2] Jiang Zhiqiang;Wang Shangwei;Luo Yougang;Zhao Pengyu;Chen Xiaoli(Petroleum Technology Research Institute,PetroChina Changqing Oilfield Company;National Engineering Laboratory for Exploration and Development of Low-Permeability Oil&Gas Fields)

机构地区：[1]中国石油长庆油田分公司油气工艺研究院 [2]低渗透油气田勘探开发国家工程实验室

出　　处：《油气田环境保护》2020年第4期9-11,74,共4页Environmental Protection of Oil & Gas Fields

基　　金：中国石油天然气股份有限公司采油采气工程技术推广与试验项目“清洁作业技术”(编号:1803-4-2)。

摘　　要：井下作业过程中会产生大量返排液和含油污泥,易造成井场环境污染。文章梳理了长庆油田井下作业存在的环保问题,提出了采油管柱密闭清洗技术、油管连续循环密闭洗井技术、分段压裂上提油管防喷技术、液压式防喷泄油器和带压作业5项井下作业关键环保技术。自2017年以来,现场应用井下作业环保技术150余井次,单井平均减少废液28.2m3,减少含油污泥0.2t,实现作业过程零污染,有效地抑制了环境污染。Changqing Oilfield is located in the Ordos Basin.The ecological environment is fragile and there are many environmentally sensitive areas.During the downhole operation,a large amount of backflow liquid and sludge will be generated,which will easily cause environmental pollution in the well site and bring many challenges to the clean production of oilfields.To this end,the environmental protection problems in the entire underground operation of Changqing Oilfield were sorted out,and the closed cleaning technology of oil production pipe column,the continuous closed circulation well washing technology of oil pipe,the anti-spraying technology of oil pipe in sectional fracturing,and the hydraulic anti-spraying oil discharge are summarized.And key environmental technologies such as pressure work.The field test applied more than 150 wells,the average single well reduced the return discharge liquid by 28.2 square meters,reduced the oil sludge by 0.2 tons,effectively inhibited the occurrence of environmental pollution problems during the operation,realized zero pollution in the operation process,and scientifically studied the underground operation of the oilfield in China.Green and civilized development have certain reference significance.

关 键 词：井下作业 环保技术 密闭清洗 连续循环密闭洗井 油管内防喷 

分 类 号：TE358[石油与天然气工程—油气田开发工程]