准噶尔盆地沙湾凹陷风城组储层特征及物性控制因素分析  

Controlling Factors on Physical Property and Reservoir Characters of Fengcheng Formation in Shawan Depression,Junggar Basin

作　　者：贾春明 潘拓 余海涛 岳喜伟 张洁 况昊[2] 于景维 JIA Chunming;PAN Tuo;YU Haitao;YUE Xiwei;ZHANG Jie;KUANG Hao;YU Jingwei(Research Institute of Petroleum Exploration and Development of Xinjiang Oilfield Company,Urumchi 830014,Xinjiang,China;Chongqing University of Science and Technology,Chongqing 401331,China;Petroleum Institute of China University of Petroleum(Beijing)at Karamay,Karamay 834000,Xinjiang,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院,新疆乌鲁木齐830014 [2]重庆科技学院,重庆401331 [3]中国石油大学(北京)克拉玛依校区,新疆克拉玛依834000

出　　处：《西北地质》2023年第4期49-61,共13页Northwestern Geology

基　　金：新疆维吾尔自治区自然科学基金项目“砂砾岩致密储层甜点成因机理”(2021D01A201);国家重大专项“大型油气田及煤层气开发”(2011ZX05001-005-01)联合资助。

摘　　要：为进一步挖掘沙湾凹陷风城组油气勘探开发潜力,需要针对储层基本特征以及物性控制因素进行详细研究。通过岩心观察、薄片分析等多种研究手段,分析储层特征以及物性控制因素,为优质储层的预测奠定基础。结果表明,风城组储集岩性以砂砾岩为主,储集空间以微裂缝为主,普遍见片状片弯状喉道,孔隙结构较差,属于特低孔特低渗储层。构造、沉积和成岩作用为储层物性主要控制因素,断裂的发育以及异常压力的形成为微裂缝的发育提供基础条件,古地貌对沉积水动力条件起到重要控制作用,岩石成分和结构差异加剧储层物性平面的非均质性。成岩作用控制储层最终物性,压实和胶结作用造成储层物性变差,溶蚀作用的发育极大改善储层的物性。研究区北部凹槽内断裂带附近的风城组砂岩类储层为下一步勘探的重点目标。It is important to search controlling factors on physical property and reservoir characters of Fengcheng Formation in Shawan depression,where need to excavate large oil and gas potential.Petrology,reserve characters and controlling factors on physical property of Fengcheng Formation were analysesed in detail through core observation,microscope image analysis,SEM,electro probe micro-analysis,physical property and oil testing data.Rock type of Fengcheng Formation was dominated by sandy conglomerate,and micro cracks were main reserve spaces with bending throats;The reservoir belonged to low porosity and low permeability with complex pore structures;Tectonic,sedimentary and diagenetic were controlling factors on physical property,development of faults and abnormal pressure built basic formation for micro cracks,ancient landscape had an important control on hydrodynamic conditions,differences on composition and construction of rocks intensified plane heterogeneity of physical property.Diagenetic controlled final physical property,compaction and cementation made physical property of reservoirs poorer,while corrosion made it better.

关 键 词：风城组 储层特征 控制因素 沙湾凹陷 准噶尔盆地 

分 类 号：P536[天文地球—古生物学与地层学] TE132[天文地球—地质学]