东营凹陷太古界储层裂缝发育控制因素及油气勘探方向

东营凹陷太古界潜山内幕油气藏属于新勘探领域,其储层具有低孔、低渗特征,属裂缝性储集类型。利用岩心观察、岩石薄片鉴定和测井资料,对太古界储层裂缝类型、特征及受控因素进行研究,并对研究区进行了有利勘探目标预测。研究表明,东营凹陷太古界潜山裂缝多为高角度张开缝,裂缝发育井段井径曲线高、低幅度交替变化,声波曲线上出现时差增大或周波跳跃。高导缝和节理缝在FMI图像上均表现为深色正弦曲线。裂缝发育的主控因素为构造作用,多期构造运动改造下2组断裂的交汇处裂缝最为发育,成为潜山内幕储层的有利发育区。据此并结合油源及盖层条件即可预测有利目标区。

Controlling factors of Archeozoic reservoir fractures development and hydrocarbon prospecting direction in Dongying depression

The reservoirs inside the Archeozoic buried hill in Dongying depression have not been drilled yet,are new exploration domain,have low porosity and permeability,and belong to fractured reservoir type. This paper studies the pattern,characteristics and controlling factors of Archeozoic reservoir fractures and anticipates favorable exploration objectives in the study area by using core observation,petrographic thin section identification and well logging data. The study indicates that the fractures in the Arch...