砂砾质辫状河露头地质建模方法研究:以克拉玛依黑油山露头区35剖面为例

Geological modeling method of gravel braided river outcrop:A case from the 35 section of outcrop area of Heiyoushan in Karamay as an example

露头研究对认识地下地质情况具有举足轻重的作用,通过露头揭示的沉积规律可以更加精确地描述地下同类型的沉积特征。以克拉玛依油田黑油山露头区35剖面为例,采用RMS地质建模软件的基于目标的Composite方法,确立建模基本目标体,评估多期河流沉积的形态规律,建立与露头认识一致的辫状河砂体的空间展布模型。研究表明,通过Composite方法多次迭代得到了辫状河多期河道侧积与切割的理想结果;通过目标函数和接收概率的退火模拟方法能够解决辫状河和三角洲河道砂体的几何形态问题。

Outcrop study plays an important role in understanding underground geological conditions.The type of deposition of the same type can be described more precisely by the sedimentation law revealed by outcrops.However,it is difficult to describe the shape,scale,orientation,and scale of target body in numerical modeling.Based on the profile of black oil hill outcrop area of Karamay Oilfield,using the Composite method based on RMS,the basic object of modeling is established.The regularity of multi-period river sedimentation is evaluated and a spatial distribution model of braided river sand bodies being consistent with outcrops is established.