The Beach Area, Northwest Of The Pile Guantao Formation Composed Of The Accumulation Conditions

The reservoir of Guantao formation has several characteristics, such as complex structure, scattered layers distribution, uncleared sedimentary laws in the northern offshore area of Zhuangxi Oilfield. And the reservoir has disadvantage to drill the straight well because of locating in the offshore. There have 4 faults controlling the structure, which are named Chengdong fault, Changdi fault, Chengbei fault and Chengbei 30 fault. There was born the structure-lithology reservoir, which moved landscape orientation. The techniques including 3D seismic data, slice plat, 3D vision and coherent analysis were applied to describe the fluvial. The influences of the structure characteristics and the structure evolvement on the scattered sedimentary were analyzed. The single well sedimentary facies was established based on the core well, and the fluvial sedimentary laws were confirmed by combing the seismic facies with logging facies. The sand body was described and traced by the qualitative and quantitative synthesis describing technology. The main reservoir styles of Guantao formation in this area, formed conditions and the control factors were analyzed through anatomizing the representative reservoir. The slope reservoir collective zone and fracture reservoir collective zone were analyzed mainly. The key condition of this style reservoir formed and distributed structure characteristic were gotten. Thus it offers the practiced experience and theory gist for the same style reservoir.