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渤中凹陷中深层储层具有埋藏深、储集性能差以及预测难度大等特点,储集层质量是制约中深层油气勘探成效的关键。在QHD36-3油田沙二段中发现的生屑云岩和含陆源碎屑云岩等白云岩储层,其储集性能明显优于相同深度的碎屑岩储层,将成为中深层高产油气层勘探的新领域之一。研究表明,生屑云岩等白云岩储层的形成主要受古地貌、古水深等因素控制,同时距离物源区的远近影响其发育程度。建立相应的沉积模式,对以生屑云岩和含陆源碎屑云岩等白云岩为目的储层的油气勘探至关重要。
The middle and deep reservoirs in Bozhong Depression are characterized by deep burial, poor reservoir performance and high prediction difficulty. The quality of the reservoir is the key factor restricting the exploration of mid-deep oil and gas reservoirs. The dolomite reservoirs found in the second member Shahejie of QHD36-3 oilfield and the dolomite reservoirs containing terrigenous clastic dolomite are obviously superior to the clastic reservoirs of the same depth in reservoir performance and will become the medium- One of the new areas of exploration. The research shows that the formation of dolomite reservoirs such as bioclastic dolomite is mainly controlled by such factors as paleogeomorphology, palaeo-depth and other factors, and the distance from the provenance area affects its development. The establishment of the corresponding sedimentary model is crucial for oil and gas exploration in reservoirs aiming at dolomite such as breccia dolomite and terrigenous clastic dolomite.