以海泛面进行垂向流动单元划分的方法--以琼东南盆地崖13-1气田陵三段为例

The method of adopting flooding surface in dividing vertical flow zones:an example from the 3rd member of Lingshui formation of QDN Basin

以层序地层划分为基础,把崖13-1气田主力产层陵三段划分为8个四级层序,并以四级层序的海泛面为控制边界,在气田南区与北II区划分出8个垂向流动单元,而在北I区划分为7个垂向流动单元。崖13-1气田东南部广海海泛对南部地区影响更大,使南区与北II区多沉积了一套海泛面泥岩隔层,导致这两个区块垂向流动单元比北I区多出一个。这一流动单元划分方案得到了气田压力测试的验证,对今后气田开发有指导作用。

Marine flooding surface is an isochronous geological boundary in the study of oil and gas reservoir in sea areas. The stable shale interlayer formed by every marine flooding is a critical factor in dividing and correlating flow zones of a reservoir. Based on sequence division, eight sequences of 4th order were subdivided in the 3rd member of the Lingshui formation in the gas field Yal3-1. Then, controlled by the flooding surface of 4th order sequence, eight vertical flow zones were distinguished in the southern area and in the second part of the northern area; however, there are only seven vertical flow zones in the first part of the northern area. The reason for this difference is that the southeast open sea influenced the south area more seriously leading to the deposition of one more flooding surface mudstone in the southern area and in the second part of the northern area. This division of flow zones was proved by the pressure test of the gas field, which would be profitable to the exploitation of the gas field.