地层面约束下的精细储层格架建立

Fine Reservoir Framework Construction Confined by Geological Surface

精细地层格架是油藏表征的基础和根本,而长井段油藏对比难度大,很难取得较好的效果。针对长井段碎屑岩油藏特征,提出了用地层面和厚度分布约束地层对比的思路及三维断面校核、修正断点完善断层的地层格架建立思路。地层面约束对比基于计算机所生成的三维地层面与井点分层数据的对应关系,找出地层异常点重点校验,查明地层对比中的问题,完善地层对比方案。同时对于新井和新区的对比,也可应用拟合的地层面建立初步的对比方案,提高对比效率。断层格架通过三维断层面与断点之间关系对比,找出异常断点,查明断点异常原因,通过对断层面和断点的人机交互修改落实断点,完善断层。研究通过三维层面与二维剖面相结合,较好地解决了对比和构造中的矛盾,可准确建立起长井段油藏的精细储层格架。

A fine reservoir framework was the foundation and root of reservoir characterization,while comparison on reservoirs in long intervals was more difficult and good effect would be hard to be obtained.In allusion to the characteristics of clastic reservoirs in the long intervals.A new way to establish reservoir architecture framework was provided for a comparison under the restriction of 3Dgeologic surface and the concept of its thickness distribution and 3Dfault calibration,fault point correction and fault perfecting was proposed.The surface constraint comparison was based on the corresponding relation of 3Dsurface and well-point data stratification created by computer,the abnormal reservoir points were found out and emphatically checked,by which the problem in comparison was pointed out to perfect the comparison program,At the same time,for a new well and new area,a matched surface could be used to establish a initial comparison program for improving its efficiency.The fault framework was contrasted through the relation between the 3Dfault surface and fault point to find out the abnormal fault point and its causes,by using the computer-interface of fault surface and fault point,the fault points were determined and fault zones were perfected.In combination of 3Dsurface with 2Dsection,the contradiction between the contrast and structure is effectively solved,by which a fine framework is established for reservoir characterization in the long intervals.