东营凹陷西部沙三上白云岩储层特征及成藏条件  

CHARACTERISTICS AND FORMING CONDITION OF DOLOMITE RESERVOIR OF E 2s up 3 IN WESTERN PART OF DONGYING DEPRESSION

作　　者：冯有良[1] 杨申镳[1] 范存堂[1] 

机构地区：[1]胜利石油管理局地质科学研究院

出　　处：《特种油气藏》1995年第4期9-15,共7页Special Oil & Gas Reservoirs

摘　　要：综合分析表明，东营凹陷西部沙三上白云岩层位稳定、分布广泛，是咸水—半咸水、高水温、强还原、较安静的半深湖环境下，以低有序度白云岩与高镁方解石的形式原生沉淀的产物。其储集空间以构造裂隙和溶孔为主，是较好储层。白云岩分布区有丰富油源、良好的生储组合、极好的油气运移动力学条件和多种运移通道。断层是油气运移的纵向通道和横向封堵面，油藏类型以构造油藏为主。断裂平面分维数、白云岩厚度和构造高点，是控制白云岩含油及产能的主要因素。Comprehensive analysis shows that the dolomite of E 2s up 3 in western part of Dongying depression has characteristics of stable horizon and widespread distribution. It is the product of connate deposit in the form of dolomite with low degree of order and calcite with high content of magnesium under the conditions of saline brackish water, high water temperature, strong reduction, and quiet bathyal environment. Its reserving space mainly consists of structural fissure and solutional void, and it is better reservoir. In dolomite region, oil source is plentiful, source reservoir assemblage is good, dynamic condition for migration of oil and gas is perfect and there are many kinds of migration pathways. Faults are vertical pathways and lateral pluggings for migration of oil and gas; reservoir type mainly consists of structural reservoir.Primary factors for controlling oil bearing and productivity of dolomite are fractal dimension of fault plane, thickness of dolomite and structural high.

关 键 词：白云岩储层 成藏条件 油气运移 东营凹陷 层位 储集空间 动力学条件 油藏类型 运移通道 封堵 

分 类 号：TE122[石油与天然气工程—油气勘探] P618[天文地球—矿床学]