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作 者:印森林 章彤[2] 万文胜[2] 吴承美[2] 李琛[2] 冯文杰[3] YIN Senlin;ZHANG Tong;WAN Wensheng;WU Chengmei;LIChen;FENG Wenjie(Instite of Mud Logging Technology and Engineering,Yangtze University,Jingzhou,Hubei 434023,China;Zhundong Oil Production Plant,Xinjiang Oilfield Company,PetroChina,Fukang,Xinjiang 831511,China;College of Geoseienees,Yangtze University,Wuhan,Hubei 434023,China)
机构地区:[1]长江大学录井技术与工程研究院,湖北荆州434023 [2]中国石油新疆油田分公司准东采油厂,新疆阜康831511 [3]长江大学地球科学学院,武汉430100
出 处:《新疆石油地质》2018年第4期445-454,共10页Xinjiang Petroleum Geology
基 金:国家自然科学青年基金(41502126)
摘 要:为深入研究曲流河三角洲河口坝内部构型模式及剩余油分布,以彩南油田彩10—彩参2井区生产动态及岩心资料为基础,利用层次分析、多维互动及动态验证的方法对河口坝构型进行了精细解剖,建立了研究区曲流河三角洲河口坝构型模式。研究表明,单一河口坝边界识别标志有两类,不同期单元垂向叠置与同期单元侧向拼接,其中,同期单元侧向拼接分为坝主体—坝主体、坝主体—坝缘—坝主体和坝主体—坝间泥—坝主体3种;研究区具有前积型与侧积型2种河口坝构型模式,前积型构型模式主要是分流河道在水动力较为稳定的情况下,后期沉积物顺流加积叠置于前期河口坝之上,侧积型构型模式主要是上游分流水道水动力增强,分流河道决口,在其侧缘发育新的河口坝;研究区发育单一河口坝129个,小层发育河口坝12~24个,单一河口坝长约500 m,宽约450 m,其中,前积型河口坝的倾角为0.31°~2.40°,自下而上倾角逐渐减小;剩余油分布类型主要有滞留型、单向受效型、注水受效差型及平面干扰型,可采用不同开发方案及措施来提高采收率。To study the inner architecture and remaining oil distribution in the mouth bar of meandering river delta, based on the produc-tion performance and core data in the Wellblock Cai-10 and Caican-2 of Cainan oilfield, the paper performs detailed analysis on the mouthbar architecture by using the methods of analytical hierarchy process, multi-dimensional interaction and dynamic verification, and estab-lishes mouth bar architecture models for the meandering river delta in the study area. The study shows that there are 2 categories of marksto identify single mouth bar boundary, namely vertical superposition of the units of different periods and lateral merging of the units of sameperiods, among which the latter structure can be classified into 3 types such as main body—main body of the mouth bar, main body—barmargin—main body and main body—between-bar mud. There are 2 mouth bar architecture models such as progradation and accretion. Theprogradational architecture model mainly refers to the structures in which the sediments of late stage accreted and superposed onto themouth bars of early stage when the distributary channel was under the circumstance of stable hydrodynamic force, and the lateral accretion-al architecture model mainly refers to the mouth bars which are developed at the margin of breached distributary channel when the hydrody-namic force became stronger. In the study area, there are 129 single mouth bars and 12~24 mouth bars that are developed in the single lay-ers. The single mouth bars are about 500 m long and 450 m wide. The dip angle of accretional architecture mouth bar is 0.31°~2.40°, whichdecreases from bottom to top. The remaining oil distribution can be divided into 4 patterns, namely retention, one-way effect, poor water in-jection effect and planar interference patterns. Various development programs and measures can be adopted to enhance oil recovery.
关 键 词:彩南油田 彩10井区 彩参2井区 西山窑组 河口坝 构型解剖 剩余油分布
分 类 号:TE111.3[石油与天然气工程—油气勘探]
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