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海上油田薄储层沉积期次解剖及开发意义——以惠州油田L油藏为例

Depth analysis of sedimentary cycles of thin reservoir in offshore Oilfield and its development significance—by taking L oil reservoir of Huizhou Oilfield as an example
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摘要 针对南海东部惠州油田珠江组L油藏储层沉积特征及演化规律认识不清等问题,综合运用岩心、分析化验、测井及地震资料,分析储层沉积水动力环境及沉积微相类型,开展井震结合的薄储层沉积期次解剖,识别刻画L油藏储层沉积期次及演化过程。结果表明:L油藏属于三角洲前缘沉积,处于河流、波浪、潮汐水动力的共同作用区,三角洲沉积受海洋水动力作用改造明显;识别出古珠江与东沙滨岸砂两支物源体系,北部古珠江三角洲是主控物源体系;L油藏发育水下分流河道、河口坝及席状砂沉积微相,连片发育的水下分流河道砂体是优势储集相带类型;空间上识别出四期三角洲前缘复合沉积体,北部的三期古珠江三角洲沉积体系自西向东叠置发育,形成L油藏的主要储集砂体,南部发育的一期东沙滨岸物源三角洲沉积与L油藏主体区连为一体,是油田开发后期挖潜的目标。 In view of the unclear understandings of the sedimentary characteristics and evolution law of L reservoir of Zhujiang formation in Huizhou Oilfield,eastern South China Sea,etc.,the sedimentary hydrodynamic environment and sedimentary microfacies types of reservoir are analyzed through comprehensive application of core,analysis,logging and seismic data,and the sedimentary period of thin reservoir is analyzed by well seismic combination,so as to identify and characterize the sedimentary cycles and evolution process of reservoir L.The results show that the reservoir belongs to delta front sedimentation and is located in the joint action area of river,wave and tidal hydrodynamic forces,and the delta sedimentation is obviously transformed by marine hydrodynamic forces.Besides that,two provenance systems are identified,and the northern Paleo-pearl river delta is the main controlling one.L reservoir develops sedimentary microfacies,such as underwater distributary channel,mouth bar and sheet sand,and the continuous underwater distributary channel sand body is the dominant reservoir facies belt type.Spatially,four phases of delta front composite sedimentary bodies are identified.The three phases of ancient Paleo-pearl river sedimentary system in the north overlaps and develops from west to east to form the main reservoir sand body of L reservoir.The first phase of Dongsha shore source delta deposition developed in the south is connected with the main area of L reservoir,which is the goal of tapping potential in the later stage of Oilfield development.
作者 邓永辉 戴建文 王华 衡立群 杨娇 潘雪徵 DENG Yonghui;DAI Jianwen;WANG Hua;HENG Liqun;YANG Jiao;PAN Xuezheng(Shenzhen Company of CNOOC(China)Co.,Ltd.,Shenzhen,Guangdong 518000,China)
出处 《石油地质与工程》 CAS 2022年第4期69-74,81,共7页 Petroleum Geology and Engineering
基金 中国海洋石油集团有限公司科技重大专项“双特高海相砂岩油藏精细描述及剩余油定量预测技术”(CNOOC-KJ-135ZDXM22SZLTD02SZ2020)。
关键词 惠州油田 珠江组 薄储层 沉积特征 沉积期次 Huizhou Oilfield Zhujiang formation thin reservoir sedimentary characteristics sedimentary cycles
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