大牛地气田回注井措施研究

Study on injection well measures in Daniudi gas field

气田产出水具有高浊度、高矿化度、高腐蚀性、高含铁量、低pH值等特点,气田产出水不能注入生产层位影响天然气开采,需选择物性好的非生产层位进行回注。回注水中固体的悬浮物会堵塞地层,造成回注压力过高,为了缓解污水处理能力不足,确保采气系统顺利运行,根据大牛地气田的实际情况,开展酸洗、重复压裂、补孔等措施,制定适合回注井的有效措施并进行现场推广应用。

Gas field fluid is high turbidity,high salinity,high corrosion resistance,high content of iron and low PH value.It could inject to non-production layers with good physical property. Solid suspensions in the fluid would fill up the formation and that will cause high injection pressure.In order to relieve inadequate capacity dispose of sewage and ensure that natural gas producing run smoothly. According to the actual situation of Daniudi gas field,it can carry out different measures through acid pickling,refracturing,perforations and so on.And then it can formulate effective measures for popularizing and applying at wellsit.