吐哈盆地台北凹陷侏罗系成岩作用特征及其对油气藏形成的控制

Diagenesis and its control of oil and gas pools in Taibei depression, Tuha basin

研究了吐哈盆地台北凹陷侏罗系煤系碎屑岩储层的成岩作用 ,认为该区压实作用强烈 ;分析了次生孔隙发育的特征 ,并对成岩阶段进行了划分 ;确定了用以判断成岩时间的两种重要胶结物———自生石英和含铁方解石的主要成岩温度 ,分别为 74～ 1 38℃及 6 0～ 1 0 0℃ ;建立了可以预测次生孔隙发育带的空间分布及各点成岩阶段埋深的模型 ;指出成岩作用和孔隙演化与构造史。

Intensive compaction and secondary pore system are the main ch aracters for the Jurassic reservoir rocks in Taibei depression, Tuha Basin. The diagenetic stage and the diagenesis temperature of two important minerals-quart z and calcite-has been worked out. The model of diagenetic stage can be used to predict the distribution of the secondary pore system and the depth of the stag e. The formation of the oil and gas pools in the area is due to the appropriate matching of the diagenesis, pore evaluation, structure development and hydrocarb on generation.