渤海古近系复杂断块油田精细构造解释技术在J油田中的应用

随着开发工作的深入,渤海油田加大了古近系复杂断块油田的开发力度。但这类油藏受多条断层影响,平面上被分为多个断块,使油田的构造和油气水分布复杂化,因此断裂系统的精确解释直接关系到该类油田的成功开发。J油田位于渤海油田辽西低凸起北端,油田内部主要存在近南北走向和近东西走向两组断裂,相互交错,致使油田内部地质条件错综复杂。结合渤海复杂油气藏开发实践,利用地震正演、方差分析等方法,对地震资料解释的一些难点进行了探讨,较好地解决了制约J油田构造精细解释的一些关键问题,有利地指导了该复杂断块油气藏的开发。

Application of the fine structural interpretation technology about Paleogene complicated fault block oil reservoir in J oilfield of Bohai sea area

With further development of Bohai sea area, the development strength of Paleogene complex fault block oilfield in Bohai sea has been increased. However, this kind of oil reservoir is influenced by multiple faults. The complex fault block oilfield is divided into a plurality of blocks. By the fault effect, the relation of oil and gas and water become very complex in this kind of oil reservoir. So the interpretation of fault system directly relates to the successful development of the oilfield. J oilfield is located in north low bulge of western Liaodong Bay. There are two groups of nearly north-south and east-west faults in the oilfield. Because of fault intersecting, the geological conditions are very perplexing in the J oilfield. In this paper, some technologies, such as seismic forward modeling and the seismic variance analysis etc, have been applied to the seismic interpretation of the Bohai complex oil reservoir. These technologies can resolve the difficulties in the seismic interpretation of J oilfield. The successful application of these technologies are advantageously directed the complex fault block oil field development. These experiences for the similar oil reservoir research are of good reference significance for complicated fault block.