摘要
为了研究含油气盆地源储被泥岩盖层分隔型下生上储式油气分布规律,在源储被泥岩盖层分隔型油源断裂类型及其特征研究的基础上,通过断裂断穿层位拆分、源岩供烃区确定、油气成藏期确定和泥岩盖层不封闭区预测,将四者综合建立了一套源储被泥岩盖层分隔型油源断裂厘定方法,并将其应用于渤海湾盆地冀中坳陷饶阳凹陷留楚地区沙一段源岩和东一段及馆陶组储层被东一、二段泥岩盖层分隔型油源断裂厘定中。结果表明:留楚地区沙一段源岩和东一段及馆陶组储层被东一、二段泥岩盖层分隔型油源断裂仅分布在北部留楚背斜核部以及南部、西部局部地区,其附近有利于东一段和馆陶组油气聚集成藏,与目前东一段和馆陶组已发现的油气主要分布在北部留楚背斜核部(南部、西部无油气,是因为其无圈闭)相吻合。该方法用于厘定源储被泥岩盖层分隔型油源断裂是可行的。
In order to study the distribution law of the lower source rock-upper reservoir type of oil and gas in the petroliferous basin with the source and reservoir separated by the mudstone caprock, on the basis of the type of the oil-source faults with source-reservoir separated by the mudstone caprock and its characteristics, a set of calibrating methods of the oil-source faults with source-reservoir separated by the mudstone caprock were established combined with the separation of the fault cutting cross horizon, the determination of hydrocarbon supplying area of the source rock and the hydrocarbon accumulation period as well as the prediction of unsealed area of mudstone caprock. And furthermore the methods were applied to calibrate the oil-source faults separated by Ed1 and Ed2 mudstone caprock for Es1 source rock and Ed1-Ng reservoirs in Liuchu area of Raoyang Sag in Jizhong Depression of Bohai Bay Basin. The results show that the oil-source faults stated above are only distributed in the core of North Liuchu anticline and the parts in the south and west, and their vicinity is beneficial to the accumulation of the oil and gas in Ed1-Ng. It is consistent with the oil-gas found at present in Ed1-Ng, which is mainly distributed in the northern core of Liuchu anticline(no oil and gas discovered in the south and west due to no trap existed). The methods are feasible to calibrate the oil-source faults with source-reservoir separated by the mudstone caprocks.
作者
李晓敏
LI Xiaomin(No.8 Oil Production Plant of Daqing Oilfield Co Ltd, Daqing 163514, China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2020年第5期34-39,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基金项目“砂泥岩层系中油源断裂输导油气优势路径演化及识别”(41872157)。
关键词
源储分隔
泥岩盖层
油源断裂
厘定方法
渤海湾盆地
source-reservoir separation
mudstone caprock
oil-source faults
calibrating method
Bohai Bay Basin
