基于动静态响应特征的水平井剖面流体识别及评价

发布时间：2018-12-15 23:40

【摘要】：低孔渗油气层的复杂油气藏越来越多,而这些区块又具有良好的资源开发潜力,是油田上产的主力区。这些区块不仅油藏复杂,而且水平井技术应用广泛,对于水平井而言,其钻井方式相当特殊,且受到其他各种因素的综合影响,使得测井响应特征更加复杂,致使油水层识别更难,同时给油藏评价带来很大困难。然而油水层识别出后,不仅可以为后期投产的油井有效厚度的划分和一些缓钻井是否实施提供一定的依据,而且为油田新区射孔方案及井别方案编制提供了较为准确的基础数据。因此,以泾河油田17井区长8油藏为例,针对该研究区的典型水平井提取多个常规测井响应特征参数,利用图版法建立交会图,先划分出水平井剖面流体类型的电性参数识别标准,在上述研究基础之上再根据P1/2正态概率法进一步划分水平井油水层识别标准,编制计算机代码,执行宏命令对研究区典型水平井进行油水层识别,并结合生产动态数据进行验证;其吻合度较高,说明该套综合性流体类型识别方法在水平井中行之有效,在地质条件相当的区块此方法可以推广运用。
[Abstract]:There are more and more complex oil and gas reservoirs in low porosity and permeability reservoirs, and these blocks have good potential for resource development and are the main production areas in oil fields. These blocks are not only complex reservoirs, but also widely used in horizontal wells. For horizontal wells, their drilling methods are very special and affected by various other factors, which make logging response more complex. Therefore, it is more difficult to identify oil and water layers, and at the same time, it brings great difficulties to reservoir evaluation. However, the identification of oil and water layers can not only provide a basis for the division of effective thickness of oil wells put into production at the later stage and whether some slow drilling can be carried out. It also provides more accurate basic data for perforation scheme and well design in the new area of oil field. Therefore, taking Chang8 reservoir of well 17 in Jinghe Oilfield as an example, for typical horizontal wells in this research area, several conventional logging response characteristic parameters are extracted, and cross plot is established by chart method. The electric parameter identification criteria of fluid type in horizontal well profile are divided first, and then, according to the P1 / 2 normal probability method, the identification standard of oil and water layer in horizontal well is further divided, and the computer code is compiled. The typical horizontal wells in the study area are identified by macro command and verified with the production dynamic data. It is proved that the method is effective in horizontal wells and can be popularized in areas with similar geological conditions.
【作者单位】：成都理工大学能源学院;成都理工大学"油气藏地质与开发工程"国家重点实验室;
【基金】：中国石油化工股份有限公司华北分公司科研项目(34550436-14-FW2099-0022)资助
【分类号】：TE33

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