非完全配置构造油气藏形成的新解释

Explanation to the Formation of Inconsistent Reservoir to Structural Trap

为稳定中国东部油气产量，除使东部老油区、老层系稳产增产外，同时还要加强新区、新层系的研究，渤海湾盆地深层就是新层系勘探的一个重要方面．迄今，人们对油气藏或油气圈闭的认识主要是从中、浅层油气藏研究中总结出来的，随着勘探领域的拓展，深层已成为东部稳产的一个重要的勘探目标．深层油气藏或油气分布控制因素与中、浅层不完全一致，用中、浅层研究方法来指导深层勘探常常事与愿违，影响深层开发进度．通过渤海湾盆地东淄凹陷地震、钻井和测试资料研究，发现深层存在一种新型的含油气圈闭，暂定名为非完全配置构造油气藏．通过对这种油气藏的特征进行分析，试图用孔隙压力所致压缩裂缝理论给予解释．这种新型含油气圈闭的发现，在理论和实践上具有一定的价值．

To stabilize the hydrocarbon production of eastern China, except paying attention to the development and production of old oil/gas fields and old oil/gas - bearing reservoirs, we must give a conscientious study on the new area and new oil/gas - bearing formation. The deep layers in the Gulf of Bohai is one of this kind of important research fields. So far, the reservior or trap study has been mainly within the upper and middle layers, it can not guide the deep(lower)layers exploration, otherwise it will be inefficent. With the extension 0f exoploration field, the deep layer study would become inexorable trend. The reservoir attributes of upper and ndddle layers are completely inconsistent with the deep one. Through the research of seismic and drilling data etc., a new type of oil/gas - bearing trap have been discovered in deep layer with high pressure coefficient, in it the oil and gas are distributed around the structural closure line. The features of this new reservoir will be discussed in this paper, and we try to explain itS formation process by shrinking fracture resulted from the high porosity fluid pressure. The discovery of this new type of reservoir (trap) is significant for the determination of exploraion objectives.