天然气水合物藏长效防砂完井探索研究  

Exploration and Research on Long-term Sand Control Completion in Natural Gas Hydrate Reservoir

作　　者：魏伟 张国强[2,3] 杨乾隆 蒋贝贝 岳广韬[1] 毛晓楠 WEI Wei;ZHANG Guoqiang;YANG Qianlong;JIANG Beibei;YUE Guangtao;MAO Xiaonan(Petroleum Engineering Technology Research Institute of Sinopec Shengli Oilfield Company,Dongying,Shandong 257000,China;Southwest Petroleum University,Chengdu,Sichuan 610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu,Sichuan 610500,China;The 10th Oil Production Plant of PetroChina Changqing Oilfield Company,Qingyang,Gansu 745100,China)

机构地区：[1]中石化胜利油田分公司石油工程技术研究院 [2]西南石油大学 [3]油气藏地质及开发工程国家重点实验室 [4]中国石油长庆油田分公司第十采油厂

出　　处：《钻采工艺》2022年第3期67-72,共6页Drilling & Production Technology

基　　金：国家科技重大专项“深层气藏气井完井优化研究”(编号:2016ZX05052003);中石化课题“天然气水合物钻完井关键技术与取心装备研制”(编号:P20040-3)。

摘　　要：近年来,中、美、加、日等国进行了多海域、多频次、多类型天然气水合物藏的防砂完井实践与探索,结果表明,砂堵问题仍是制约其长效开采的关键因素。文章基于神狐海域水合物藏储层特征、出砂机理分析、疏松砂岩防砂实践以及神狐海域防砂探索(2017和2020年)经验,研究并剖析了现有筛管完井技术在泥质粉砂岩水合物藏储层中的应用局限性,首次提出了基于井口打压井下周期解堵的“自清洁”精密复合防砂筛管设计构思,并就其自清洁原理、应用前景进行了分析说明,优化设计了筛网尺寸及挡砂精度;此外,文章还对该筛管核心部件“冲砂管”的结构、材质、开孔方式以及冲砂周期进行了优化研究。文章中的“自清洁”防砂筛管研究是长效防砂完井的一次创新探索,旨在推动水合物藏开发进程。In recent years,China,U.S.A,Canada,Japan and other countries have carried out the natural gas hydrate(NGH)exploitation for many times in multiple types of NGH reservoirs in different sea areas.However,the results show that the problem of sand plugging is still a key factor restricting its long-term efficient exploitation.In this paper,based on the NGH reservoir characteristics and the sand production mechanism analysis in Shenhu sea area,the practice experiences of sand control in loose sandstone reservoirs and the sand control experiences of NGH reservoir exploration in Shenhu sea area(2017 and 2020),the limitations of the existing technology of screen completion in NGH reservoirs with argillaceous siltstone have been analyzed and studied extensively and deeply.The design concept of"self-cleaning"precise micropore composite screen(PMC)is proposed for the first time,its self-cleaning principle and the application prospect are analyzed and explained,and the screen size and screening accuracy are optimized.Meanwhile,the structure,material,slotting type,and the periodic sand plugging removal of the sand flushing pipe,which is the core component of the new PMC,is also discussed in this paper.Finally,this research focusing on"self-cleaning"sand control screen is an innovative exploration of long-term sand control completion,which will help to promote the development process of NGH reservoir.

关 键 词：天然气水合物藏 长效防砂完井 自清洁筛管 挡砂精度 可燃冰开采 

分 类 号：TE358.1[石油与天然气工程—油气田开发工程] TE257