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孙虎地区是华北油田油气勘探的一块“硬骨头”,长期勘探未获较大突破。本文运用成藏动力学系统这一石油地质学新理论对这一勘探薄弱地区进行了研究。通过分析孔隙流体压力的纵、横向特征,划分出五个成藏动力学系统,确定了生排烃期。根据该地区油气运移的特征总结出了3种成藏模式,即垂向成藏模式、侧向成藏模式和复合成藏模式。初步探讨了孔虎地区的成藏控制因素及油气规律。
The Hu-Hu area is a “hard bones” of oil and gas exploration in Huabei Oilfield, with no major breakthrough in long-term exploration. In this paper, we use the new theory of hydrocarbon accumulation kinetics to study the weak area of exploration. By analyzing the vertical and horizontal characteristics of pore fluid pressure, five reservoir forming dynamic systems are identified and the period of hydrocarbon generation and expulsion is determined. According to the characteristics of hydrocarbon migration in the area, three kinds of accumulation models are summarized: vertical accumulation mode, lateral accumulation mode and complex accumulation mode. The controlling factors of hydrocarbon accumulation and hydrocarbon laws in Konghu area were discussed preliminarily.