变质岩潜山储层结构及其生产动态响应--以渤海锦州251南油田为例  

Reservoir structure and production dynamic response of metamorphic buried hill:taking JZ251S Oilfield in Bohai Sea as an example

作　　者：程奇 刘宗宾 王建立 王刚 王树涛 CHENG Qi;LIU Zongbin;WANG Jianli;WANG Gang;WANG Shutao(Tianjin Branch of China National Offshore Oil Company Limited,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《东北石油大学学报》2022年第1期26-35,I0003,共11页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2016ZX05058-001)。

摘　　要：锦州251南油田为渤海首个投入开发的大型变质岩潜山油田,发育孔隙裂缝型储层,储层非均质性强,生产动态规律复杂。根据钻井取心、薄片、测井、地震及生产动态等资料,分析变质岩潜山储层特征,建立储层结构模式,讨论储层结构对油田生产的影响。结果表明:锦州251南油田潜山储层以构造裂缝为主,可进一步划分为张性裂缝、剪切裂缝及亚断裂带(大裂缝)。潜山储层发育受褶皱作用和断裂活动影响,褶皱作用控制裂缝储层的发育,分别在核部和翼部形成张性裂缝与剪切裂缝;断裂活动主要于沙三段和东营组沉积时期派生大量亚断裂带(大裂缝)。研究区发育凸起带、高斜坡带及近断层低斜坡带三类储层结构模式,其中凸起带核部储层张性裂缝发育,采油井无水采油期最长,开发效果好;高斜坡带及凸起带翼部剪切裂缝较发育,开发效果次之;大裂缝的沟通导致近断层低斜坡带采油井易发生暴性水淹。该结果对同类型潜山油藏的高效开发具有指导意义。JZ251S Oilfield is the first large-scale metamorphic buried hill oilfield put into development in Bohai Sea.It develops pore fracture reservoir with strong reservoir heterogeneity and complex production performance law.According to the data of drilling coring,thin section,logging,seismic and production performance,the reservoir characteristics of metamorphic rock buried hill are analyzed,the reservoir structure model is established,and the effect of reservoir structure on oilfield production is discussed.The results show that the reservoir of JZ251S buried hill is mainly structural fractures,which can be further divided into tensile fractures,shear fractures and sub fault zones(large fractures).The development of buried hill reservoir is affected by folding and fault activity.Folding controls the development of fractured reservoir,forming tensile fractures and shear fractures in the core and wing respectively.The fault activity is mainly derived from a large number of sub fault zones(large fractures)in the sedimentary period of Sha 3 Member and Dongying Formation.There are three types of reservoir structure patterns in the study area:uplift zone,high slope zone and near fault low slope zone.The tensile fractures in the reservoir at the core of the uplift zone are developed,the water free oil production period of the oil production wells is the longest,and the development is effective.The wing shear fractures of high slope zone and convex zone are relatively developed,and the development effect is the second.The communication of large fractures leads to violent flooding of oil production wells in low slope zone near fault.The results are of guiding significance for the efficient development of buried hill reservoirs of the same type.

关 键 词：太古宇 变质岩 褶皱作用 断裂活动 储层结构 生产动态 锦州251南油田 渤海油田 

分 类 号：P618.13[天文地球—矿床学] TE311[天文地球—地质学]