桦甸盆地古近系桦甸组油页岩矿床沉积特征

Sedimentary Characteristics of Oil Shale Deposit of the Huadian Formation of Paleogene in Huadian Basin

桦甸盆地位于敦密断裂带主干断裂的北侧,是一个半地堑式盆地.受同生控盆断裂的控制,含油页岩段厚度和油页岩单层厚度均由北缘向南缘断裂(F1)方向逐渐增厚.盆地内古近系(下第三系)桦甸组为一个完整的三级层序,油页岩形成于水进体系域和高水位体系域的浅湖-深湖环境中.共发育可采油页岩13层,含油率较高(一般8%～13%),质量较好,具有很好的工业前景.

. In Huadian basin, there are 13 oil shale layers containing high-mobile oil （commonly 8%-13%）. These high quality oil shales may h The Huadian basin situated in southern Jilin Province of NE China is a half-graben basin and lies to north of the Dunhua-Mishan faults. The thickness of oil shale-bearing strata and monolayer increase gradually from north to south under the control of the contemporaneity fault （F1）. The fault also controlled basin filling features of the Huadian basin. The whole sequence of Huadian Formation of Paleogene in Huadian basin comprises a complete 3^rd order sequence. The oil shales within the sequence were deposited in semi-deep to deep lacustrine environments, and were developed during transgressive systems tract and highstand systems tractave the potential for industrial use.