金湖凹陷火山岩断块油藏地质特征与开发规律

Geologic Characteristics and Exploitation Rules of Volcanic Rock Fault Block Reservoirs in Jinhu Depression

在研究金湖凹陷火山岩断块的构造特征、岩石类型与岩相分布、储集空间类型与组合规律的基础上,提出了6种储集空间类型和4种岩相-构造类型的孔洞缝组合模式,指出了在火山岩储层中孔洞缝发育的有利部位,并对研究区火山岩断块油藏在开发过程中表现出的特殊性及其形成原因进行了论述,指出了油井产量受控于岩相和构造部位,油井初期产量高、含水上升快是小型裂缝型火山岩断块油藏的固有特性。

Based on the study of structural characteristics, type of rocks and distribution of lithofacies, type of reservoir space and rule of combination of volcanic rock fault block in Jinhu Depression, 6 types of reservoir spaces and combination modes of 4 types of lithofacies and fractured and vuggy structures were put forward, the favorable location of fractured and vuggy reservoirs in volcanic rock fault block were pointed out;the particularity and the reason of volcanic rock reservoir in exploitation process were dissertated. It is pointed out that the oil production rate is controlled by structural location. High original production rate,high water cut increase rate are the inherent characteristics of such fractured volcanic fault block reservoirs.