叠合盆地油气成藏后多期构造变动与有利区预测——以塔里木台盆区奥陶系为例  

Oil and Gas Accumulation after Multiple Tectonic Changes and Prediction of Favorable Areas in Superimposed Basin——An Example from the Ordovician of Tarim Basin

作　　者：余秋华[1,2] 庞雄奇[1,2] 王怀杰 

机构地区：[1]中国石油大学(北京)盆地与油藏研究中心 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中石油煤层气有限责任公司韩城分公司,陕西韩城715400

出　　处：《石油天然气学报》2011年第4期11-16,164,共6页Journal of Oil and Gas Technology

基　　金：国家"973"规划项目(2006CB202308)

摘　　要：中国西部叠合盆地经历了多旋回的油气成藏作用和多期构造变动破坏作用,目前发现此类盆地存在着很多复杂油气藏。多期的构造变动是叠合盆地形成复杂油气藏的主要原因。通过塔里木盆地研究表明:可以用成藏期内剥蚀量和剥蚀前地层厚度比来定量表征构造变动强度,并利用地质统计的方法建立构造变动强度与油气藏保存概率之间的数学模型,根据该模型预测各期次油藏保存概率,通过地质过程叠加成藏模式理论最终预测塔里木台盆区奥陶系目的层有利勘探区带。该方法为有利勘探区带预测提供了新的途径。Superimposed basins in western China went through several cycles of hydrocarbon accumulation and multi-period destruction of structural changes,it was currently found that there existed a number of complex reservoirs in such a basin.Multi-period construction changes were the main reason of forming the complex reservoirs in the superimposed basins.Research shows that in Tarim Basin,the thickness ratio of the denudation and formation before erosion can be used to represent intensity of tectonic changes and statistical methods are used to establish the mathematical model between the tectonic changing intensity and the preservation probability of reservoirs,according to the model,the preservation probability of reservoirs is predicted,through geological superposition pattern to predict of the final forming Ordovician favorable exploration target zones is predicted in Tarim Basin.Compared with the current exploration data,it provides a new method for forecasting the favorable zones.

关 键 词：叠合盆地 构造变动强度 剥地比 地质过程叠加模式 多期构造变动 

分 类 号：P618.13[天文地球—矿床学]