褶皱型潜山内幕形态与勘探方向
——以白音查干达￣锡地区为例

Inner structure of fold￣type buried hill and hydrocarbon exploration direction: an example of Da￣Xi Area, Baiyinchagan Sag

 张放东¹ 齐仁理 2 周杰¹ 王学军¹ 孔海瑞¹

中国石化中原油田分公司勘探开发研究院，河南 濮阳 457001 中国石化中原油田分公司博士后科研工作站，河南 郑州 450017）

Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Zhengzhou 450017, China)

 基岩潜山油藏是深层油气勘探的一个重要领域。二连盆地白音查干凹陷达￣锡地区发育基岩褶皱型潜山，具有形成油气藏的良好条件。达￣锡潜山内幕结构与我国东部的潜山有较大差异，目前钻探资料较少，应用常规方法勘探难度较大。文中以定量造山动力学为指导，建立数学模型，通过模拟褶皱型潜山的形成及演化过程，发现褶皱型潜山内幕结构主要受挤压缩短量与地表剥蚀强度二因素控制。对于挤压与剥蚀较小的区域，基底的高部位是基岩油藏勘探的主要方向；对于挤压程度较大、剥蚀程度较重的地区，基岩隆起的腰部是基岩油藏勘探的主要方向。结合白音查干凹陷的实际勘探情况，BD11井西部白音翁特断裂带南段地区是未来白音查干凹陷基岩油藏的勘探方向。

 The basement reservoir is an important oil and gas exploration domain. Recent drilling shows that the fold￣type basement reservoir of inner buried hill is developed in Da-Xi Area, Baiyinchagan Sag. Because the inner structure is quite different from the buried hill in the eastern of China, and up till now there are quite few wells drilled into basement and seismic data is unable to get clear image in inner buried hill. The exploration of inner buried hill reservoir is very hard. Mathematical physics equations were built by mathematical simulation of fold structure evolution. The inner buried hill is better understood by the mathematical simulation. Mathematical model shows that inner structure is controlled by the shorten ratio caused by compression and erosion intensity. In low compression area, top of the fold is the favorable exploration direction, while in high compression area, the middle of the fold is the favorable exploration direction. Combined with regional drilling data in Baiyinchagan Sag, it is concluded that the west of BD11 is the favorable exploration area.

10.6056/dkyqt201606007