渤海湾盆地东濮凹陷上古生界潜山油气成藏条件评价

EVALUATION ON THE HYDROCARBON POOL-FORMING CONDITIONS OF THE UPPER PALEOZOIC BURIED HILLS IN THE DONGPU SAG OF THE BOHAIWAN BASIN

胡宗全 王传刚 张玉兰 张福顺 周新科

HU Zong-quan WANG Chuan-gang ZHANG Yu-lan ZHANG Fu-shun ZHOU Xin-ke

中国石化, 石油勘探开发研究院, 北京, 100083

Research Institute of Petroleum Exploration and Production, SINOPEC, Beijing 100083, China

与济阳坳陷对比,渤海湾盆地东濮凹陷具备潜山油气成藏的基本条件.以已有的钻井作控制,提取了各关键井的储层条件、烃源条件和盖层条件作为成藏条件评价的源参数,以油气显示级别作为成藏条件的指示参数,建立了神经网络数学模型,对东濮凹陷各关键井上古生界潜山的油气成藏条件进行评价.通过对3种评价源参数的分布进行平面分区,对东濮凹陷上古生界的成藏条件进行了平面预测,结果表明中央隆起带是上古生界潜山油气勘探的最有利地区.近期文古2井在上古生界的工业油气流突破证实了模型的预测结果.对该油气藏的解剖表明,在煤系之上的、埋藏较浅的、厚层粗粒的砂岩应是上古生界勘探的主要目的层.

Compared with the Jiyang Depression, the Dongpu Sag of the Bohaiwan Basin has the basic conditions of forming buried hill hydrocarbon reservoirs. Under the control of key wells, the developing conditions of source rocks, reservoirs and caprocks were extracted as input parameters, the grade of hydrocarbon shows was used as indicator parameters, and a neural network mathematical model was constructed to evaluate the hydrocarbon pool-forming conditions of the Upper Paleozoic buried hills in various key wells of the Dongpu Sag. By subdividing the distribution areas of the three types of input evaluation parameters, the pool-forming conditions of the Upper Paleozoic buried hills in the Dongpu Sag were predicted on the plane, which showed that the central uplift zone had the best prospects. Well Wengu-2 achieving industrial productivity for the first time in the Upper Paleozoic buried hills in the Dongpu Sag proved the predicting accuracy of the model. The characteristics of the Wengu-2 hydrocarbon pool indicated that the coarse and thick sandstone above coal measures had lower depth, and should be the main target layers of exploration in the Upper Paleozoic.

https://doi.org/10.11781/sysydz200406553