准噶尔盆地西北缘中拐-五八区佳木河组储层主控因素及发育区预测  

PREDOMINANT FACTOR AND FORECASTING OF RESERVOIR OF ZHONGGUAI-5-8 ZONE'S PERMIAN JIAMUHE FORMATION IN NORTHWEST MARGIN,ZHUNGGER BASIN

作　　者：吴晓智[1,2] 蒋宜勤[3] 李佰华[2] 唐勇[3] 常秋生[3] 

机构地区：[1]中国地质大学(北京),北京100083 [2]中国石油勘探开发研究院,北京100083 [3]新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆地质》2010年第2期174-179,共6页Xinjiang Geology

摘　　要：准噶尔盆地西北缘中拐-五八区二叠系佳木河组发育火山岩、砂砾岩两类储集层.应用储层静态宏观岩相、岩性、微观结构及动态成岩与孔隙演化相结合方法,着重探讨储层主控因素.据储层主控因素,提取相应地震属性,有效开展储层横向预测,达到有利勘探区带优选目的.二叠系佳木河组储层为特殊岩类储集层,属溶蚀孔隙占主导的低孔、低渗双重介质类型,火山岩具强酸敏性,砂砾岩具强水敏性,对气层钻井与试油保护要求较高.二叠系佳木河组储层主控因素为岩性、岩相和溶蚀作用.岩性决定储层基质孔隙发育程度,岩相决定储层规模,溶蚀决定储层优劣,沿断裂带与流体疏导体系溶蚀作用较强,形成有效储层.中拐-五八区构造位置有利,佳木河组形成自生自储,是天然气勘探重要区带.勘探区上亚组有利区位于八区白碱滩断裂带,沿断裂带展布;中亚组有利区位于中拐凸起东翼五区,沿尖灭线展布;下亚组有利区围绕中拐凸起南北两翼断裂发育区展布.Zhongguai 158 Zone＇s Permian Jiamuhe Formation includes two types＇reservoirs which are igneous rock and sandy conglomerate in Northwest Margin,Zhungger Basin.This paper discuss predominant factor of this reservoir through analyzing the character of lithofacies and lithology,the character of microstructure and dynamic diagenesis and porosity evolution,and then,on this base,forecasting the spatial distribution of Jiamuhe Formation＇s reservoir through extracting seismic attribute.Jiamuhe reservoir is a special type,which is a double-porosity media with low permeability and low porosity reservoir predominating by dissolution pore.Igneous rock reservoir is strong acid sensitivity, while clastic rock reservoir is water sensitivity.On this condition,protecting gas reservoir is a pivotal technology during drilling.The reservoir of Jiamuhe Formation is predominated by 3 factors,which are lithology,lithofacies and dissolution.The development degree of matrix pore of reservoir is predominated by lithology;lithofacies controlled the scale of reservoir and dissolution determined the reservoir＇s good or bad.Effective reservoir often develops along fault belts and passage system where dissolution zone are strongly.Jiamuhe Formation in Zhongguai 158 Zone has a advantageous structural locality with the easily developing self-source and self-reservoir pool.Tt is also an important nature gas exploring potential area.The important potential regions fellow as： Upper Jiamuhe Formation is spreading along Baijiantan fault in the 8th zone; Middle Jiamuhe Formation is distributed along depositional termination in the 5th zone of Zhongguai Salient＇s east fling;Lower Jiamuhe Formation is in north and south fling of Zhongguai Salient＇s fault block.

关 键 词：准噶尔盆地 中拐-五八区 佳木河组 主控因素 储层预测 

分 类 号：P618.130.21[天文地球—矿床学]