循环洗井工艺在延川南煤层气田的应用  

Application of circulating well flushing technology in southern Yanchuan CBM Field

作　　者：邵小平 崔彬[1] 刘亚茹 谢昕翰 宋关伟[1] 任立昌 徐杰华 SHAO Xiaoping;CUI Bin;LIU Yaru;XIE Xinhan;SONG Guanwei;REN Lichang;XU Jiehua(Sinopec Linfen Coalbed Methane Branch,Linfen,Shanxi 041000,China)

机构地区：[1]中国石化临汾煤层气分公司,山西临汾041000

出　　处：《油气藏评价与开发》2022年第4期651-656,共6页Petroleum Reservoir Evaluation and Development

摘　　要：煤层气开发在排水采气过程中由于压降作用易产生煤粉及带入压裂砂,目前煤粉产出及压裂砂沉积已经成为制约煤层气连续稳定排采的关键性因素。以延川南煤层气田为研究区块,该区块因煤粉、砂沉积泵堵和卡泵造成的检泵作业比例较高。为了有效减少该类作业发生,延长气井免修期,保证气井生产连续性,降低运行成本,研制了循环洗井装置并制定了配套工艺。经过现场实际检验,明确了自动循环洗井工艺可有效降低气井检泵次数,空心杆自动循环洗井工艺可有效延长气井免修期,泵下洗井工艺可有效提高泵效,增加气井日产液量。应用结果表明,煤层气循环洗井装置和配套工艺矿场应用情况良好,可有效提高油管内的液流速度,将油管内的砂和煤粉携至地面,解决了泵卡、泵堵、泵漏,为现场控制煤粉提供了新的思路。During the drainage and gas production process of coalbed methane development,due to the pressure drop,the pulverized coal is prone to appear and brought into fracturing sand.At present,the pulverized coal and the deposition of fracturing sand have become the key factors restricting the continuous and stable drainage and production of coalbed methane.As the proportion of pulverized coal pump blockage in southern Yanchuan CBM Field is high,in order to effectively reduce the occurrence of this kind of operation,prolong the maintenance free period of gas wells,ensure the continuity of the production of the gas wells and cut the operation cost,a circulating well flushing device is developed and the supporting process is formulated.After the field tests,it is clear that the automatic circulation well flushing process can effectively reduce the pump inspection times of the gas well,the hollow rod automatic circulation well flushing process can effectively prolong the maintenance-free operating period of the gas well,and the pump down well flushing process can effectively improve the pump efficiency and increase the daily liquid production of the gas wells.The application results show that the CBM circulating well flushing device and supporting process are well applied in the mine,which can effectively improve the liquid flow velocity in the oil pipe,carry the sand and pulverized coal in the oil pipe to the ground,solve the pump sticking,pump plugging and pump leakage,and provide a new idea for on-site control of pulverized coal.

关 键 词：煤粉 自动循环洗井工艺 空心杆自动洗井工艺 泵下洗井工艺 免修期 

分 类 号：TE37[石油与天然气工程—油气田开发工程]