胜利油田东营凹陷中央隆起带断层封闭模式研究

东营凹陷中央隆起带断裂系统复杂，断层封闭性直接控制油气藏形盛分布及油气藏规模，封闭性强的断层附近可形成大规模油气藏，封闭性差的断层附近油气藏规模小，甚至无油气藏形成。以岩性配置封闭模式、主应力封闭模式和泥岩沾污带封闭模式3种最主要的封闭模式为例建立了东营凹陷中央隆起带断层封闭模式。定量分析评价了东营凹陷中央隆起带断层封闭性，认为东营凹陷中央隆起带封闭性断层的最佳断面正应力为40～50MPa，封闭性断层的泥岩沾污因子常小于2．6。针对某一具体断层判断其是否具有封闭性需多方面综合分析，不可简单地进行单因素分析。

FAULT SEAL MODEL OF THE CENTRAL UPLIFT, DONGYING DEPRESSION

Fault systems in the Central uplift of the Dongying depression are complex. The fault sealing properties directly control the formation and distribution of the oil/gas accumulation as well as its size and type. Large oil/gas accumulations may form near a fault with good sealing properties, while small accumulations or even no accumulations occur near a fault with poor sealing properties. Take for example the lithological combination seal model, principal stress seal model and shale smear zone seal model, a fault seal model is established and fault sealing properties are quantitatively analyzed and evaluated in the Central uplift of the Dongying depression. The optimal normal stress of the sealing fault in the study area is about 40 to 50 MPa and the shale smear factors for the sealing fault is commonly <2.6. To judge whether a particular fault has sealing properties requires an integrated analysis, and one must not make single-factor analysis simply.