致密砂岩气藏水平井生产技术对策  

Countermeasures Against Production Management of Horizontal Wells in Tight Sandstone Gas Reservoirs

作　　者：金大权 杨志伦 张春雨 陈启文 张春 

机构地区：[1]中国石油长庆油田分公司第四采气厂

出　　处：《天然气勘探与开发》2016年第4期44-47,52,共5页Natural Gas Exploration and Development

摘　　要：苏里格气田二叠系盒8段、山1段主力气层属于致密砂岩储层,目前水平井是气田的主要开发方式和主力生产井,然而水平井存在生产初期压力、产量递减快,低产阶段井筒易积液、气井管理难度大等问题。针对上述问题,通过开展水平井压力、产量及井筒积液规律等研究,提出了水平井"合理控制压降、低配长稳"的技术管理思路,优化了水平井井下节流器参数配置、排水采气及间歇制度等配套工艺措施。采用上述对策措施后,有效控制了气井压降、出砂,并延长了气井连续稳定生产时间,井下节流器配产符合率提高了17%,在减少积液水平井间歇开关频次、泡排药剂用量和加注频次同时,排出了井筒积液,延长气井开井周期,水平井生产时效明显提升。As the key reservoirs in Sulige gasfield, the Permian Shihezi 8 Member and Shanxi 1 Member belong to tight sandstone gas reservoirs. Presently, horizontal wells are the major method of development and the main production ones. However, these kinds of wells have some problems such as rapid decline in pressure and output, wellbore liquid loading at low-yield stages,and management difficulties. So, based on the research of the pressure, output and liquid-loading law of horizontal wells, some countermeasures of 'reasonable control of pressure drop, low production allocation, and long-term stable yield'are made, and the parameter configuration of downhole throttler, drainage gas recovery technology and intermittence system are optimized. With these measures, the pressure drop and sand production can be effectively controlled; moreover, the continuous and stable production time should be extended. As a result, the coincidence rate of production allocation of throttler is improved by 17%. At the same time of reducing the intermittent switching frequency, and the dosage and injection frequency of foaming agent for horizontal wells with liquid loading, the wellbore liquid loading can be discharged, and the well-opening period is also prolonged, resulting in significant improvement of production efficiency.

关 键 词：苏里格 致密砂岩气藏 水平井 低压低产 井筒积液 生产管理 技术对策 

分 类 号：TE37[石油与天然气工程—油气田开发工程]