泌阳凹陷张扭性区域构造精细解释

泌阳凹陷内发育张扭性构造,油区主要集中在这些构造复杂区域,对这些区域的构造精细解释显得非常重要。文中结合泌阳凹陷内张扭性断层特征,提出了在地震和地质上的识别方式以及张扭性区域的构造精细解释方法,较好地解决了断层两盘地震同相轴可对比性差、层位追踪和构造解释困难的难题,使得油区的沉积微相平面分布、断层组合和一些地质假象得到合理解释;并通过区内张扭性走滑断层的解释和平面归位,使沉积微相分布和地层厚度变化上具有了很好的可对比性,为后续油气开发奠定了坚实基础。

Fine structural interpretation of extensional-shear region in Biyang Depression

There is an extensional-shear region in Biyang Depression. The oil zones within the basin mainly concentrate in the complex structure area. It＇s very important to finely interpret the structure. Combined with the characteristics of extensional-shear fault in Biyang Depression, this paper puts furward the identification way on the seismic and geological and the fine interpretation method of extensional-shear region, which can solve the pmhlems such as the poor c.omparison of seismic event at both sides of fault and the difficuh horizon tracing and structural interpretation, making the plane distribution of sedimentary microfacies, fault combination and some geological illusions get reasonable explanation. Through the fauh-restoration and interpretation of strike-slip faults in extensional-shear region, the distribution of sedimenlary microfacies and the change of strata thickness have strong eomparative, which can laid a solid foundation for subsequent oil and gas development.