文章摘要
渤海海域渤中13-1油田沙一段生屑云岩储层特征及控制因素
Bioclastic dolomite reservoir Characteristics And Controlling Factors in S1 Formation of BZ 13-1 Oilfield in Bohai Bay
投稿时间:2018-06-29  修订日期:2018-06-29
DOI:
中文关键词: 渤海海域  沙一段  生屑云岩  控制因素
英文关键词: Bohai Bay  S1 Formation  bioclastic dolomite  controlling factors
基金项目:国家科技重大专项“海上稠油高效开发示范工程(2016ZX05058)”
作者单位E-mail
汪跃 中海石油(中国)有限公司天津分公司渤海石油研究院 15602060462@163.com 
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中文摘要:
      针对渤海海域渤中13-1油田埋深超过3900m沙一段储层依然发育高孔中渗储层的现象,利用录井、岩心、薄片、常规物性、全岩等资料,在对储层基本特征和古地貌分析的基础上,探讨了优质储层形成的控制因素。研究发现,该区沙一段优质储层主要以生屑云岩为主,平均厚度约3m,具中高孔中渗的特点,储集空间类型主要为生物体腔孔等原生孔隙为主,粒间溶蚀孔和颗粒溶蚀孔次之。宏观上,古地貌控制了优质储层的平面分布,古水深控制了优质储层纵向上的厚度。微观上,螺类的含量,碳酸盐胶结物、长石、酸性火山岩岩屑的溶解作用和方解石等胶结物的白云石化作用是形成优质储层的主要原因。勘探实践表明,生屑云岩是该区油气富集的主要主要场所。该规律为类似构造带的储层预测提供借鉴意义。
英文摘要:
      High porosity-medium permeability reservoir member 1 of Shahejie formation of BZ13-1 oilfield in Bohai Bay which is buried more than 3900m depth is still developed. Comprehensive utilization of the logging, core, thin section, conventional physical properties and bulk composition, on the basis of the basic characteristics of reservoir and palaeogeomorphology analysis, quality control factors of reservoir formation are discussed. Study found that bioclastic dolomite is the high quality reservoir of member 1 of Shahejie formation in the oilfield, with the characteristics of average thickness of about 3 m and high porosity-medium permeability.And reservoir space types are mainly biological body cavity hole of primary pore, intergranular dissolution pore and grain dissolution pore is secondary. Macro level, The main controlling factors of the planar distribution the high quality reservoirs is palaeogeomorphology, and the thickness of the high quality reservoirs vertically is influenced by ancient water depth.Micro level, the content of snails and the dissolution of carbonate cement, feldspar, acidic volcanic rock cuttings,and dolomitization is the main cause of forming high quality reservoirs. Exploration practice shows that bioclastic dolomite reservoir is the main hydrocarbon enrichment. The rule can provide reference for the similar structural belt of reservoir prediction.
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