伊拉克Missan油田白垩系Mishrif组碳酸盐岩储层特征  

Carbonatite of Mishrif Formation Characteristics of Missan Oilfield in southeastern Mesopotamia,Iraq

作　　者：林传立[1] 刘耀军 万欢[1] 苏本玉[3] 

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津塘沽300452 [2]中国海油伊拉克有限公司,北京100007 [3]中国矿业大学(徐州)资源与地球科学学院,江苏徐州221116

出　　处：《内蒙古石油化工》2017年第1期97-103,共7页Inner Mongolia Petrochemical Industry

基　　金：Enhanced Redevelopment Plan for the Missan Oil Fields;柬埔寨F区块地震与地质综合研究

摘　　要：结合区域沉积背景及前人认识,认识到Mishrif层以开阔台地相为主,主要发育两种沉积类型:台内滩(礁)相、开阔潮下相,以台内滩亚相为有利的储集相带,滩体主要发育于开阔台地的地貌高地。通过储层岩性类型、储集空间、物性及裂缝、孔隙发育的影响因素分析,指出Mishrif组碳酸盐岩储层岩性主要为泥晶生屑灰岩,少部分为生屑泥晶灰岩。从薄片图像分析,孔隙类型全部为次生孔隙;结合常规物性分析,认为以中孔为主,局部较差,岩石的颗粒大部分为生物碎屑,流体可在生物碎屑颗粒周边流动,在岩心内部仍具有一定的流动能力。成岩作用对Mishrif组储层物性影响也较大,起建设性改造的成岩作用有溶蚀作用、白云石化作用、生物扰动及压溶产生的缝合线、缝合面作用。储层孔隙发育微观上主要受控于岩相、成岩作用,平面上还和构造位置及沉积环境有关,位于构造高部位的台地浅滩微相往往物性较好,含油丰度较高,可作为寻找高产有利储层的方向。Combined with the regional sedimentary background and previous knowledge, show that Mishrif Formation dominant with open platform facies,two types of sedimentary developed： the terrace （reef） facies,open subtidal phase,favorable reservoir facies belt associate with the beach subfacies,beach body development mainly on geomorphic highland of open platform. Through analysis of types of reservoir litbology,reservoir space,physical property,the influence factors about the development of fracture and pore analysis ,points out that the carbonate reservoir lithology of Mishrif Formation mainly includes micritc biodetritus limestone, a few shcal microfacies. From the slice image analysis, types of pore is secondary porosity. Combined with routine petrophysical analysis,mesoporosity hole with local poorer, most of the rock is bioclastic,fluid can flow around bioclastic particles surrounding,fluid inside the core still has a cer- tain capacity. The impact that diagenesis has on Mishrif Formation is marked,the reconstructive diagenesis including denudation, dolomitizatio, biological disturbance and the effects of the sutures, suture surface pressolution. For the micros aspect,pore development of the reservoirs are mainly controlled by lithofacies and diagenesis,also related to sedimentary environment and tectonic position,high structural parts of the platform shoal microfacies often have better properties,oil--bearing abundance is higher,thus as the direc- tion to find high yield and good reservoir.

关 键 词：Missan油田 白垩系 Mishrif组 碳酸盐岩储层 开阔台地相 泥晶生屑灰岩 浅滩微相 

分 类 号：P618.130.2[天文地球—矿床学]