潜江凹陷隐蔽油藏勘探技术

Exploration technology for subtle reservoirs in Qianjiang sag.

在等时地层对比的基础上 ,应用高精度层序地层学研究了潜江凹陷隐蔽油藏的分布和类型 ,建立了盐湖储集层预测地质模型。利用高分辨率二维地震资料 ,分析了盐湖地层地震速度和波阻抗特点 ,并对模型进行了正、反演及预测方法研究。采用油藏描述、油气多元综合预测评价、模式识别等方法分析了砂体含油性 ,提出了潜江凹陷隐蔽油藏勘探目标。实施结果与两个已知油田吻合较好 。

Distribution and type of subtle reservoirs in Qianjiang sag are studied and forecasting geological model of brine lake reservoirs is built using high accuracy sequence stratigraphy on the basis of isochronic stratigraphic correlation. Seismic velocity and wave impedance properties of brine lake formations are analyzed using 2D seismic data with high resolution factor, forward, inversion and forecasting method for model are studied. Oil?bearing possibility of sand body is analyzed using the methods of reservoir description, oil?gas multicompontent comprehensive forecasting and evaluation, pattern recognition and so on. Exploration target of the subtle reservoirs in Qianjiang sag is put forward. The implemented result is identical with that of two known oilfields, and new oil?bearing blocks are found.