李承龙,韩昊
LI Chenglong,HAN Hao

• 1:大庆油田有限责任公司勘探开发研究院
• 2:大庆油田有限责任公司第三采油厂

摘要(Abstract)：

CO_2驱初期易出现见气早、采出井含碳率高、气体突进严重等问题,严重影响注气开发效果。从储层发育特征及动态特征出发,利用数值模拟方法对气窜影响因素进行分析,应用灰色关联度和模糊综合评判法对注气井是否存在气窜趋势进行评判,制定了气窜通道趋势分类界限;根据采出井气油比指标、注采井间连通关系、射孔数据及相带明确气窜通道发育方向,建立了一套气窜通道评判方法并进行矿场验证。结果表明:当模糊评判值G≥0. 35时,注入井存在气窜通道趋势;评判结果与气体示踪剂结果基本吻合。该方法为现场采取气窜防控措施、改善注气开发效果提供了理论基础。
In the early stage of CO_2 flooding,the gas is prone to be seen early and its rate is rather higher in the well,and more seriously the gas breaks through along the gas channeled path,and furthermore the gas injection development effects are seriously influenced. From the viewpoints of the reservoir development characteristics and dynamic performances,with the help of the numerical simulating method,the influencing factors of the gas channeling were analyzed,and moreover by means of grey correlation degree and fuzzy comprehensive judging method,whether there exists the gas channeling trend or not was judged,and the trend classification limits were formulated,the developmental direction of the gas channeled path was made clear according to the gas-oil ratio of the producing well,the connectivity between the injection and production wells,the perforation data and the facies belt,a set of the judging method of the gas channeled path were established,finally the field test was identified and verified. The results show that when the fuzzy judgement value is more than 0. 35,there exists the trend of the gas channeled path the gas channeled path; the judged results are basically consistent with the ones of the gas tracer. It is proves that the accuracy of the method can provide the theoretical bases for the control measures on the gas channeling in the field and the improvement in the development effects of the gas flooding.

关键词(KeyWords)： CO2驱;气窜通道;灰色关联度;模糊综合评判法;发育方向
CO2 flooding;gas channeling;grey correlation degree;fuzzy comprehensive judging method;developmental direction

Abstract:

Keywords:

基金项目(Foundation): 国家重大科技专项“大型油气田及煤层气开发”(2017ZX05013006)

作者(Author): 李承龙,韩昊
LI Chenglong,HAN Hao

DOI: 10.19597/j.issn.1000-3754.201801094

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