摘要
苏里格气田东区具有多层系含气特征,其中盒8段、山1段、山2段是该区主力产层,都呈现出低孔-特低孔,特低渗-超低渗这一典型致密储集层特征,由于差异性致密化,三层段的物性参数、孔隙结构等表现出较大的差异。综合应用岩石铸体薄片、扫描电镜、高压压汞、常规物性、X射线衍射、流体包裹体测温、成岩演化序列重建,以及多元回归分析等方法,对三层段的储集层特征、成岩作用、成岩演化序列及储集层致密化影响因素进行了定性、定量评价。结果表明,三层段储集层砂岩主要为富岩屑砂岩,经历的成岩演化序列具有一定相似性,孔隙演化与各段强度差异较大的成岩作用密切相关;储集层致密化时间盒8段为中成岩A期末,山1段为中成岩B期初,山2段为中成岩B期中期;定量分析了影响孔隙度和渗透率对各段物性的影响程度,并以此结果指导优选勘探区带。
The Eastern Sulige Gas Field has multilayers of gas-bearing strata,especially the sandstone reservoir of the He8,Shan 1 and Shan 2 members are the main producing strata. All these three members are characterized by low to ultra-low porosity,ultra-low to extra-low permeability. Due to different densification,these members have variable physical property and pore structure. Qualitative/quantitative evaluation the difference in characteristic of reservoir,diagenesis,diagenetic evolution process,controlling factors of sandstone densification by analytical techniques including casting slice,scanning electron microscope,high pressure mercury injection,physical properties analysis,X-ray diffraction,fluid inclusion and multivariate regression analysis method. The result show that the reservoir of these three members are lithic sandstone with abundant lithic fragment,Although these sandstone had experienced similar diagenetic process,the porosity evolution is closely related to the strength of diagenesis. The densification time of reservoir of three member is different,the He 8,Shan 1 and Shan 2 members were completely compacted at the end of middle diagenetic A stage,the early of middle diagenetic B stage,and the middle of middle diagenetic B stage,respectively. This study also quantitatively evaluated effect ofcontrolling factors on physical property of different member to reveal the role of porosity and porosity. The research achievements could provide a new guidance for predicting favorable exploration areas.
作者
王猛
唐洪明
卢浩
李林泽
王家敏
赵峰
郭红光
杨勇
WANG Meng;TANG Hong-ming;LU Hao;LI Lin-ze;WANG Jla-mm;ZHAO Feng;GUO Hong-guang;YANG Yong(School of Geoscieace and Technology, Southwest Petroleum University, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu 610500, China;Sulige Gas Field Project Management Department, Xibu Drilling Engineering Company Limited, CNPC, Ordos, Inner Mongolia Autonomous Region, E＇erduosi 017300, China;Changqing Division, Logging Limited Company, Petro China, Xi＇an 710021 ,China;PetroChina Changqing Oilfield Changbei Operating Company,Xi＇an 710021, China)
出处
《矿物岩石地球化学通报》
CSCD
北大核心
2017年第5期855-866,共12页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金重点项目(51534006
51674211)
关键词
影响因素
致密化
成岩序列
苏里格气田东区
鄂尔多斯盆地
main controlling factor
densification
diagenetic evolution
the Eastern Sulige Gas Field
Ordos Basin
