辽河油田东、西部凹陷深层沙河街组成岩演化规律

THE DIAGENETIC EVOLUTIVE LAW OF DEEP BURIAL STRATA AT SHAHEJIE FORMATION IN EASTERN AND WESTERN DEPRESSIONS OF LIAOHE OIL FIELD

于兴河 张道建 李胜利 雷鸣 郜建军 孙洪斌 孟卫工

YU Xing-he ZHANG Dao-jian LI Sheng-li LEI Ming GAO Jian-jun SUN Hong-bin MENG Wei-gong

中国地质大学能源系, 北京100083 2. 中国新星石油公司规划研究院, 北京100083 3. 辽河油田勘探开发研究院, 辽宁盘锦124010

China University of Geosciences, Beijing 100083, China 2. Petroleum Institute, China National Star Petroleum Corporation, Beijing 100083, China 3. Exploration & Development Research Institute of Liaohe Petroleum Exploration Bureau, Panjin 124010, China

辽河油田东、西部凹陷深层沙河街组砂岩次生孔隙的发育有着明显的差异,东部凹陷为3个次生孔隙发育带,而西部为2个;东部凹陷沙二下部-沙三段顶部的次生孔隙带,即上部次生孔隙发育带,主要是受地表淡水淋滤和后期沿不整合面的开启性水循环综合作用的结果,而下部两个带与西部凹陷的两个次生孔隙发育带的形成机理类似,为封闭性水循环的有机酸水溶液对硅酸盐矿物的溶解作用所致。其形成的地质条件是温度100～130℃,压力系数1.2～1.3±,烃源岩大量排烃的阶段和深度。

The development of secondary porosity of sandstones has evidence law at deep burial strata of Shahejie Formation in eastern and western depressions of Liaohe oil field. The eastern depression has three secondary porosity zones in vertical, but western only two. The secondary porosity zone of the second member lower to the third member top of Shahejie Formation, viz the upper secondary porosity, is the result of leached by surface fresh water and integrated process along unconformity interface later period by inorganic acid in open water circulation. The mechanism of lower two zones of secondary porosity is similar to two secondary porosity in western depression which silicate mineral had been made solution by organic acid in seal water circulation. The geological conditions of these two zones forming are following as:temperature is about 100 to 130 Celsius, pressure coefficient is 1.2 to 1.3 around, the phase and depth are during source rock had made abundant expulsion hydrocarbon.

国土资源部“百名跨世纪科技人才”基金

https://doi.org/10.11781/sysydz199904291