渤海南部渤中34-9油田发现的勘探开发启示  

Exploration and development enlightenments from the discovery of Bozhong 34-9 Oilfield in southern Bohai Sea

作　　者：崔名喆 李超 袁勋 吴穹螈 曹龙 Cui Mingzhe;Li Chao;Yuan Xun;Wu Qiongyuan;Cao Long(Tianjin Branch of CNOOC(China)Co.,Ltd.,300452)

机构地区：[1]中海石油(中国)有限公司天津分公司,300452

出　　处：《中国石油勘探》2023年第2期57-69,共13页China Petroleum Exploration

基　　金：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05058);中海石油(中国)有限公司综合科研项目“渤海‘双高’油田挖潜关键技术研究”(YXKY-2018-TJ-04)。

摘　　要：渤中34-9油田是截至2022年渤海已发现受火成岩影响最大的新生界砂岩油藏,在我国海上油田开发中尚属首次,火成岩精细识别以及火成岩对砂岩储层侧向封堵性研究对于油田高效实施至关重要。文章充分利用岩心、微观薄片、钻测井及正演模拟资料,精细表征不同火成岩相,建立渤海地区不同火成岩相识别模板。从岩石学特征和测井物性表征等方面开展火成岩封堵性评价,明确研究区主要发育岩性—构造油藏,火成岩对含油圈闭以分割和封堵作用为主,并针对性开展火成岩对砂岩储层封堵性研究,总结火成岩侧向封堵砂岩圈闭模式,提出有利挖潜区。研究表明,研究区主要发育火山通道相、侵入相和溢流相火成岩,明确研究区岩墙侧向封堵、层状火成岩岩体侧向封堵和层状火成岩岩体侧向不封堵3种火成岩侧向封堵砂岩圈闭模式,其中前两种火成岩侧向封堵模式可作为良好的潜力评价区。油田78口开发井的成功实施,丰富了渤海地区火成岩发育区砂岩油藏勘探开发的技术手段,对渤海乃至国内外类似油田的勘探开发经验具有重要的指导意义。Bozhong 34-9 Oilfield is characterized by the first Cenozoic sandstone oil reservoir discovered in Bohai Sea by 2022 that affected by igneous rocks the most,as well as the first in offshore oilfield development in China.Therefore,the fine identification of igneous rocks and its lateral sealing capacity for sandstone reservoir are very crucial to the high-efficiency oilfield development.By fully using core,thin section,well drilling,logging,and forward modeling data,igneous rock facies are finely characterized and identification chart is established in Bohai Sea area.The sealing capacity of igneous rocks is evaluated from aspects of petrology and logging physical property characterization,which indicates that the lithologic-structural oil reservoir is dominated in the study area,and igneous rocks mainly segment and seal oil traps.Specially,the lateral sealing capacity of igneous rocks is evaluated,the pattern of igneous rocks laterally sealing sandstone trap is summarized,and potential area is proposed.The study results show that volcanic conduit facies,intrusive facies and overflow facies igneous rocks were mainly developed in the study area,and three patterns of igneous rocks laterally sealing sandstone trap are identified,i.e.,lateral sealing by dike,lateral sealing by stratified igneous rock mass or lateral non-sealing by stratified igneous rock mass.The first two types of igneous rocks lateral sealing patterns have favorable conditions for further evaluation.A total of 78 development wells have successfully been implemented in the oilfield,which enriches the exploration and development technical means of sandstone oil reservoirs in the igneous area in Bohai Sea area,and has important guiding significance for the exploration and development of similar oilfields at home and abroad.

关 键 词：火成岩 精细解剖 封堵性评价 侧向封堵模式 勘探开发启示 

分 类 号：TE122.1[石油与天然气工程—油气勘探]