摘要
为了搞清吴起油田曾岔区长6油层组沉积特征及储层物性的影响因素,结合前人研究成果,综合分析油气显示、岩心、毛管压力及测井等资料,对研究区沉积特征和储层特征进行了研究。研究区为三角洲前缘亚相沉积,主要储集体为水下分流河道砂体,砂体主要呈北东—南西方向展布。储层孔喉半径较小,孔隙连通性差,属于特低孔—特低渗储层。影响研究区储层物性的主要因素为沉积作用和成岩作用:沉积相对储层物性具有控制作用,水下分流河道砂体的储层物性最好,其次为河口坝、席状砂;成岩作用中压实作用和胶结作用使储层物性变差,而交代作用、溶蚀作用使储层物性得到了一定的改善。河道微相为下一步油气勘探开发目标区。
In order to clarity＇ the influencing factors of the sedimentary characteristics and reserwlir physical protier- lies of Oil Group Chang 6 in Zengcha Area of Wuqi Oilfield, integrating with tile previous study results and compre- hensively analyzing the hydrocarbon occurrences, core, capillary pressure, well logging data and so on, the above two characteristics and properties are researched. The study area is regarded as delta front sedimentary subfaeies, the main reservoir is underwater distributary channel sandbodies, which are distributed and spread along the NE- SW direction. There are rather smaller pore and throat radii, poorer pore connectivity, belonging to the ultra low- porosity and ultra low-permeability reservoirs. The principal influencing factors of tile reservoir physical properties in the area are deposition and diagenesis： the sedimentary facies possess the controlling action, the underwater dis- tributary channel sandbodies are the best in the properties, tile next is the mouth bars and sand sheets; the compac- tion and cementation of the diagenesis can make the physical properties become worse, on the contrary, the melaso- realism and dissolution can improve the reservoir physical properties to a certain extent. The underwater distributary channel microfacies is the next exploration and development target of tile oil and gas.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2015年第1期30-35,共6页
Petroleum Geology & Oilfield Development in Daqing
关键词
沉积特征
储层特征
储层物性
影响因素
曾岔区
吴起油田
sedimentary characteristic
reservoir feature
reservoir physical property
inlfluencing factor
Zengcha area
Wuqi Oilfield
