叠前反演追踪砂体技术的应用——以平湖油气田花港组为例

Application of pre-stack inversion technology to tracing sand body: A case study from Huagang Formation in Pinghu Oil and Gas Field

平湖油气田是一个受构造和岩性共同控制、边底水活跃的中型油气田,主要含油层系为古近系花港组。目前油田已经进入开发后期,含水达97%,采出程度达40%。为确定该区剩余油分布,文中利用叠前反演储层预测技术,优选了泊松比、拉梅系数等参数,由构造解释、储层反演、砂体追踪入手,进一步落实了各小层砂体的构造特征、平面分布、相互接触关系,从而为油田的稳产提供了有力的支撑。

Pinghu Oil and Gas Field is a medium-sized Oil and Gas Field, which is controlled by structure and lithology, with active bottom/edge water. The main oil-bearing layer is Paleogene Huagang Formation. At present, the oil field has entered late stage of the development, with 97% moisture content and recoved out by constrained seismic inversion. The result of seismic inversion and drilling practice result show that the first part of Heidimiao reservoir vertically developed well, there are many vertical sand body layers which superimpose with large gross thickness, and the sand bodies can be executed tracing contrast on the horizontal; while the sand body of the second part of Heidimiao reservoir is basically undeveloped. It is helpful to exactly predict the favorable accumulation zone and provide an important geological basis for instructing the oil and gas exploration of Heidimiao reservoir in Aonan Oilfield.