辽河断陷大民屯凹陷曹台地区太古宇潜山储层分析

Analysis of the reservoirs in the buried archaezoic hills in Caotai area of Damintun depression,Liaohe rift

曹台潜山位于辽河断陷大民屯凹陷东侧,为一整体含油气构造,地层为太古宇潜山,其岩性主要为混合花岗岩,储层为裂缝型储层.利用综合地质研究、储层测井识别和地震技术对储层进行精细研究,分析潜山储层岩性、电性、物性、孔隙成因类型、孔隙发育影响因素、裂缝展布等特征,根据测井曲线特征对有利储层进行识别,根据地震属性特征及应力场分布特征等对储层展布进行研究,认为该区储层发育,有利于油气聚集成藏.在此基础上部署曹605井,取得较好的滚动勘探效果,展示了该区潜山带具有良好的勘探前景,预计可探明石油地质储量2.0×107t.

Caotai buried hills are located in the east side of Damintun depression in Liaohe rift,and it is an integrative oil bearing structure,its formation being archaezoic buried hill,its lithology mainly mixed granite,and the reservoir fractured reservoir.Accurate study has been conducted in the three aspects including reservoir features,logging identification and seismic techniques.In the study,various reservoir properties and logging curve features are analyzed,such as reservoir lithology,electric properties,pore origin types,the factors affecting the pore development,fracture features,and logging curve feature identification.The seismic attribute feature and stress field features are analyzed,it is found that the in the area the reservoir is well-developed and favorable for oil and gas accumulation,indicating that it is promising for exploration and it is expected to report proved reserves of 2 000×104 t in the area.