东营凹陷孔二段源岩有利烃源分布及南坡深层潜山气藏勘探

东营凹陷南坡深层潜山勘探程度较低,孔二段烃源岩的生烃潜力及有利烃源分布是制约其勘探的重要成藏因素。首先从孔二段烃源岩的岩性颜色、生烃潜力地化指标、生物标志化合物特征等方面分析了其生烃潜力及发育特征;在此基础上,结合东营凹陷构造演化背景及孔二段地层发育特征,利用地震资料对孔二段烃源岩有利烃源分布进行了预测;同时,通过已钻井分析,建立了南坡深层潜山成藏模式,并在其指导下,结合孔二段有利烃源分布,对东营凹陷南坡深层潜山进行了综合评价。

The Favorable Hydrocarbon Source Rock Distribution of the Ek2 Formation and the South Slope Deep Buried Hill Gas Reservoir Exploration in Dongying Depression

The exploration degree of the south slope deep buried hill is very low. The hydrocarbon generation potential of the Ek2 formation hydrocarbon source rock and the favorable hydrocarbon source rock distribution are the important accumulation factors restricting its exploration. Firstly, the hydrocarbon generation potential and the developmental characteristics were analyzed from the lithology color and hydrocarbon generation potential geochemical indicadors, biomarker compound characteristics and so on three aspects. On this base, combined with the background of Dongying depression tectonic evolution and the formation developmental characteristics of the Ek2 formation, the favorable hydrocarbon source rock distribution of the Ek2 fomation was predicted using the seismic data. At the same time, the south slope of deep buried hill reservoir model was established by analyzing drilled wells. And under its guidance, combined with the favorable hydrocarbon source rock distribution of the Ek2 formation, the south slope deep buried hill of Dongying depression was carried on the comprehensive evaluation.