二连盆地巴音都兰凹陷油气资源空间分布研究

Research on spatial distribution of petroleum resources in Bayindulan Sag of Erlian Basin

张成林 黄志龙 卢学军 罗强 丁修建 陈哲龙 高潇玉

中国石油大学（北京）地球科学学院，北京 102249 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 中国石油华北油田公司勘探开发研究院，河北 任丘 062552

College of Geosciences, China University of Petroleum, Beijing 102249, China State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China Research Institute of Exploration and Development, Huabei Oilfield Company, PetroChina, Renqiu 062552, China

二连盆地巴音都兰凹陷的重点勘探目的层阿尔善组（K1ba）构造圈闭和油藏欠发育，以岩性圈闭和油藏为主，高资源丰度的有利区难以确定，制约勘探进程。信息集成法能够综合成藏地质条件和已钻探结果，是目前预测油气空间分布较为先进的方法，运用该方法预测研究区目的层的油气空间分布，取得良好效果。结果表明：有效烃源岩厚度、有利储层指数和运聚指数等是目的层成藏有效判别的主要因素；巴音都兰凹陷K1ba预测地质资源量6 306×104 t，剩余资源量3 560×104 t；断阶带￣断槽带的扇三角洲前缘砂体，以及包楞构造带的陡坡近岸水下扇、湖底扇砂体和缓坡辫状河三角洲前缘砂体含油气概率大，资源丰度高，应是勘探岩性油藏的重点地区。

In Bayindulan Sag of Erlian Basin, few structural traps and reservoirs develop in key exploration target strata K1ba, mainly by lithologic traps and oil reservoirs. And the favorable regions with high resource abundance are hard to determine, which restricts the exploration process. Means of information integration can combine accumulation geological conditions with drilling results, which is an advanced method for predicting resource spatial distribution at present. This paper uses the means of information integration to predict the resource spatial distribution of K1ba, acquiring a good effect. The results show that the effective source rock thickness, favorable reservoir index and migration?鄄accumulation index are valid identifying factors for accumulation. The predicted in?鄄place resource amount of K1ba is 0.630,6 million tons and its remaining resource amount is 0.356,0 million tons. The fan delta front sand bodies in step?鄄fault zone and fault trough zone, as well as the coastal subsea apron and sublacustrine fan sand bodies of steep slope and the braided river delta front sand bodies of gentle slope in Baoleng tectonic zone have large oil?鄄bearing probability and high resource abundance, which should be the main targets of lithologic reservoir exploration.

10.6056/dkyqt201405002